Class Definition for Class 335 - ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

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CLASS 335,	ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS
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SECTION I - CLASS DEFINITION

This class is restricted to the structure of electric current switching devices or relays of general application for closing or opening electrical circuits which devices are magnetically operated or to magnet structure, per se, either electromagnets or permanent magnets, adapted for use as a source of magnetic flux for performing external work.

The devices classified in this class are for the most part of the electromagnetic type utilizing magnetic cores and armatures. However, included also are devices of the electrodynamic type wherein mutually coupled conductors are caused to move relative to each other by the interaction of the magnetic fields produced by the flow of electric currents in the conductors.

Combinations of magnetically actuated circuit makers and breakers or work magnets and electromagnets with electrical connector plugs, sockets or other special type housings or casings are in this class.

Electrical systems or circuits which include the magnetically controlled switches or relays or work magnet and electromagnet structures comprising the subject matter of this class, are excluded from this class. These systems or circuits are classified in the various electrical or art classes depending upon the type of electrical system or apparatus controlled.

This class also includes subcombinations of magnetically actuated switches and relays classified in this class and which are either claimed as used in a magnetically actuated switch or relay or which are by disclosure peculiar to such use.

SECTION II - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

29,	Metal Working, subclasses 602.1+ for methods of manufacturing transformers and inductances, and residual methods of manufacturing magnets and electromagnets which do not fall elsewhere, and see the extensive notes to subclass 602.1 for the lines between Class 29 and other classes.
140,	Wireworking, subclasses 71+ for wireworking apparatus, some of which can be used to manufacture electromagnets.
148,	Metal Treatment, subclasses 100 through 122for processes of improving the magnetic properties of material having at least one component which is a free metal or alloy, other than by mere magnetization, and subclasses 31.55 and 31.57 for stock resulting from such processes; subclass 100, notes, for lines between Class 148 and other classes.
174,	Electricity: Conductors and Insulators, for miscellaneous conductors and insulator structure, some of which is applicable in the electromagnet.
178,	Telegraphy, appropriate subclasses for magnets and electromagnets utilized in telegraph communication systems.
198,	Conveyors: Power-Driven, subclasses 381 , 439 and 619 for magnetic type conveyors.
204,	Chemistry: Electrical and Wave Energy, subclasses 155+ for processes for producing chemical changes by the use of magnetic devices and subclass 193 for corresponding apparatus.
210,	Liquid Purification or Separation, subclasses 222+ for such subject matter having magnetic means to effect the purification or separation.
219,	Electric Heating, subclasses 600+ for inductive heating, subclasses 678+ for microwave heating, and subclasses 764+ for capacitive dielectric heating.
221,	Article Dispensing, appropriate subclasses and see especially subclass 212 for magnetic article holding discharge assistants and the controls therefor.
234,	Selective Cutting (e.g., Punching), appropriate subclasses, and particularly subclasses 59+ for a pattern-controlled selective cutting machine wherein the pattern senser may involve electrical circuit-controllers.
242,	Winding, Tensioning, or Guiding, subclasses 430+ for winding of motor cores, inductances, and resistances.
246,	Railway Switches and Signals, appropriate subclasses for electric railway signaling systems utilizing magnets and electromagnets.
250,	Radiant Energy, subclasses 281+ for ionic separation or analysis methods and apparatus which use magnets or electromagnets, subclasses 396+ for electron or ion beam deflection or focusing systems utilizing magnets or electromagnets.
252,	Compositions, subclasses 62.51+ for processes of making magnetic compositions and the resulting product when it is claimed as stock or bulk material, and subclasses 500+ for electrically conductive compositions and devices defined solely in terms of the composition of which they are composed. Included are contacts and switches defined solely in terms of their composition or stock.
292,	Closure Fasteners, subclass 251.5 for magnetic closure fasteners.
294,	Handling: Hand and Hoist-Line Implements, subclasses 65.5 and 88 for magnetic lifting and grappling devices.
307,	Electrical Transmission or Interconnection Systems, particularly subclasses 38 , 55+, 96+, 100, 326+ for switching systems and subclass 101 for the control or removal of residual or remnant magnetism.
310,	Electrical Generator or Motor Structure, subclasses 10+ for electric motor and generator structure utilizing magnets or electromagnets.
313,	Electric Lamp and Discharge Devices, is the generic class for the structure of space discharge devices; subclasses 153+ for space discharge devices and lamps utilizing magnets or electromagnets; subclasses 146+ for Class 313 for discharge devices which are provided with a movable electrode. Some discharge devices are closely analogous in structure to some types of circuit makers and breakers. See Class 313, class definition, Lines With Other Classes and Within This Class, "Distinction Between Discharge Devices and Electric Switches," for the distinction between a space discharge device and a circuit maker and breaker.
314,	Electric Lamp and Discharge Devices: Consumable Electrodes, appropriate subclasses for arc lamps having magnets and electromagnets for controlling the feed of arc electrodes. Note particularly subclasses 113+ .
315,	Electric Lamp and Discharge Devices: Systems, appropriate subclasses for electric lamp and space discharge device systems having electromagnets and magnets.
318,	Electricity: Motive Power Systems, appropriate subclasses for electric motor control systems utilizing magnets, electromagnets or relays, particularly subclasses 789+ for induction motor systems operating from a single phase source with start winding removal under the control of an electromagnetic switch; and subclasses 821+ for induction motor systems having the impedance of the secondary circuit under the control of an electromagnetic switch.
320,	Electricity: Battery or Capacitor Charging or Discharging, appropriate subclasses for battery and condenser charging and discharging systems utilizing magnets and electromagnets or relays.
322,	Electricity: Single Generator Systems, appropriate subclasses for generator systems utilizing magnets, electromagnets or relays.
323,	Electricity: Power Supply or Regulation Systems, appropriate subclasses for voltage control or phase control systems utilizing magnets, electromagnets or relays.
324,	Electricity: Measuring and Testing, subclasses 415+ for contact, relays and switch testing, subclass 200 for magnetic testing devices utilizing magnets and electromagnets or inductors, and subclasses 76.11+ for electric meters utilizing magnets and electromagnets.
332,	Modulators, appropriate subclasses for modulators utilizing magnets and electromagnets.
333,	Wave Transmission Lines and Networks, appropriate subclass for wave transmission lines and networks utilizing magnets, electromagnets or relays, subclasses 101+ for plural channel systems including branched circuits with switching, subclass 13 for resonator type breakdown discharge system, e.g., T-R or R-T systems, and 245+ subclasses for long line elements and components which may perform a switching or blocking function, e.g., long line short circuiting switches and long line shorting plugs.
334,	Tuners, appropriate subclasses for a variable tuner comprising an inductor and a capacitor, with the inductor and/or capacitor being variable, subclasses 47+ for tuners which are varied or adjusted by a switching operation which usually involves a make and break type switch of the electromagnetically actuated type.
336,	Inductor Devices, appropriate subclasses for the structure of transformers and inductive reactors of general utility.
340,	Communications: Electrical, appropriate subclasses for miscellaneous electrical communication systems utilizing magnets, electromagnets or electromagnetically actuated switches.
343,	Communications: Radio Wave Antennas, for radio wave energy systems such as radar and directive systems, which have an antenna, some of which systems utilize magnets, electromagnets or relays and for antennas which may utilize electromagnetically actuated switches, note particularly subclass 768 for slot type antennas with periodic control of the slot or coupling; subclass 777 for plural wave guide type antennas with control of the individual antenna; subclass 876 for antennas with switching between the antennas and lines; and subclass 904 for antennas which may be combined with a switch.
346,	Recorders, appropriate subclasses for recording devices utilizing magnets, electromagnets or relays.
361,	Electricity: Electrical Systems and Devices, subclasses 245+ for polarity reversing systems; subclasses 2+ for safely systems involving circuit interruption; subclasses 139+ for relay and electromagnetic switching systems; and subclasses 600+, especially subclass 376 for arrangements of circuit-closer structures on a mounting or combinations of circuit-closers with conductors or busbars, including enclosed or housed switchboards.
362,	Illumination, subclass 398 for electric illumination device having magnetic supporting means.
363,	Electric Power Conversion Systems, appropriate subclasses for conversion systems utilizing electromagnets, magnets, or relays.
373,	Industrial Electric Heating Furnaces, particularly subclasses 138+ for heating inductors combined with electric furnace structure.
422,	Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, subclasses 186.01+ for apparatus for producing chemical changes in electromagnetic fields.
427,	Coating Processes, subclasses 58+ for coating processes, per se, wherein the product in useful as an electrical product.
428,	Stock Material or Miscellaneous Articles, subclasses 375+ for coated electrical conductors which may include contacts and switches, but which are merely recited as a base with a particular coating thereon.
439,	Electrical Connectors, subclass 12 for electrical connectors having magnetic holding means.
455,	Telecommunications, subclasses 352+ for remotely controlled radio receivers which may use electromagnets; and subclasses 170.1+ for radio receivers for tuning or wave selection using electromagnets.
505,	Superconductor Technology: Apparatus, Material, Process, subclasses 150+ for high temperature (T_c > 30 K) superconducting devices, and particularly subclasses 211+ for electrical energy storage devices, magnetic coils, wires, cable, etc.
600,	Surgery, subclasses 9+ for permanent magnets or electromagnets utilized in surgery and diagnostics.

SUBCLASSES

[List of Patents for class 335 subclass 1]

This subclass is indented under the class definition. Devices including at least one contact actuating switch means of the type classifiable in this class in combination with a diverse type switching means of a type classifiable elsewhere in another art class. The two or more switching means may be physically located in the same housing or casing and may have cooperative features as long as each one is operative independently of the other. Some examples of diverse type switches are the mechanical, thermal and thermal current actuated type.

(1) Note. In order to be classifiable in this subclass the claimed subject matter must include means whereby at least one set of main contacts are opened or closed entirely under the influence of magnetic means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

141+,	for single switch devices having a principal actuating means which is magnetically controlled in combination with thermal current responsive means.
159+,	for patents claiming a plurality of independent switch devices under the class definition.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 5 for devices, other than magnetically actuating, comprising a plurality of switches, each being separately operated whereby a plurality of contacts are actuating to control at least two or more circuits; subclasses 175+ for nonmagnetically controlled telephone type switches, not restricted to the telephone art by claimed subject matter, wherein a plurality of contacts are automatically selected; subclass 50 for a plurality of nonmagnetically operated switches adapted to be operated in a predetermined sequence; subclass 51.04 for plural switches selectively controlling multiple circuits and combined with or actuated by connector coupling; subclass 81.4 for devices comprising a plurality of fluid pressure actuated switches.
307,	Electrical Transmission or Interconnection Systems, particularly subclasses 29 , 38, 113+, and 326+ for switching systems which may include plural switches.
337,	Electricity: Electrothermally or Thermally Actuated Switches, subclasses 2+ for electrothermal or thermally actuated circuit makers and breakers.
361,	Electricity: Electrical Systems and Devices, subclasses 139+ for electric circuits for relays and electromagnets which may include a plurality of switches.

[List of Patents for class 335 subclass 2]

This subclass is indented under the class definition. Devices including operating or actuating means for opening or closing the switch contacts and in which at least one of such operating or actuating means is an electromagnet. For purposes of classification in this subclass an electrical circuit is considered to be the equivalent to a single continuous conductor joining a source to a load through a device capable of interrupting or completing the continuity of the conductor.

(1) Note. The subject matter to be found in this and the indented subclasses includes devices known as "electromagnetic switches", "circuit breakers", "relays" and "electromagnetic interrupters".

(2) Note. Devices commonly known as "relays" and which, by enclosure, contain all the essential structure to make a switch, but in which the claimed subject matter does not include actual contact structure are in this class in subclasses 209+ below.

(3) Note. For electromagnetically actuated switches forming an element of an electrical control circuit for a particular art device search should be extended to the art class relating to the particular art device to be controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

209+,

below, for subject matter relating to electromagnet with armature and for electromagnet or magnet structure, per se.

SEE OR SEARCH CLASS:

178,	Telegraphy, appropriate subclasses for electromagnetically operated switching devices and keying devices or other code transmitters especially adapted for the telegraph art.
200,	Electricity: Circuit Makers and Breakers, subclass 12 for pivoted contact dial type switches with electromagnetic release, subclasses 402+ for double snap switches utilizing magnetic means to improve the snap action, subclass 83 for diaphragm type, fluid pressure actuated switches with a magnet.
218,	High-Voltage Switches With Arc Preventing and Extinguishing Devices, subclasses 22+ for electromagnetic or permanent magnetic blow out means for extinguishing an arc.
246,	Railway Switches and Signals, appropriate subclasses, especially subclasses 218+ for electrically actuated electromagnetic switch and signal devices peculiar to the railway art.
307,	Electrical Transmission or Interconnection Systems, subclasses 112+ for switching systems in which the individual switches may be wholly or in part electromagnetically controlled.
310,	Electrical Generator or Motor Structure, subclasses 10+ for dynamo-electric machine structure, particularly subclasses 31+ for reciprocating devices with self-actuated interrupter, and subclasses 40+ for rotary machines, which may include switching devices in the form of commutators.
318,	Electricity: Motive Power Systems, appropriate subclasses for motor control systems which may include electromagnetic control switch means, see especially subclasses 445+ .
324,	Electricity: Measuring and Testing, subclasses 415+ for contact, relay and switch testing.
340,	Communications: Electrical, appropriate subclasses for electromagnetic switches utilized in electrical signaling or communication systems in general.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for electromagnetic switches used in safety and protection systems, subclasses 139+ for control circuits for electromagnetic devices, and subclasses 247+ for igniting system using magnets or electromagnetic control means.

[List of Patents for class 335 subclass 3]

This subclass is indented under subclass 2. Devices including at least one element of the contact actuating or control means which consists of ferromagnetic material whose physical dimensions are subject to change in the presence of a magnetic field.

SEE OR SEARCH THIS CLASS, SUBCLASS:

215+,

for magnetostrictive device actuator structure, per se.

SEE OR SEARCH CLASS:

310,	Electrical Generator or Motor Structure, especially subclass 26 for the structure of magnetostrictive type, reciprocating, dynamoelectric machines.
318,	Electricity: Motive Power Systems, especially subclass 118 for magnetostrictive motor with control system therefor.
361,	Electricity: Electrical Systems and Devices, subclasses 139+ for control circuits for electromagnetic devices.

[List of Patents for class 335 subclass 4]

This subclass is indented under subclass 2. Subject matter in which the device includes structure which peculiarly adapts or restricts its use to radio-frequency or microwave frequency conductive circuitry.

(1) Note. The switching devices found in this and indented subclass 5 below comprise contact means whereby a continuous physical path is established in one or more conductors of the circuit to be controlled.

SEE OR SEARCH CLASS:

333,	Wave Transmission Lines and Networks, for high frequency wave transmission line and network switching systems, particularly subclasses 2+ for automatically controlled plural channel systems, subclasses 101+ for branched circuit switching, subclass 13 for resonator breakdown systems (e.g., TR or RT systems), subclass 15 for pilot line controlled systems; subclass 16 for pilot current controlled systems, subclasses 17.1+ for automatically controlled systems and subclasses 245+ for wave transmission components that may include switches.
343,	Communications: Radio Wave Antennas, subclass 777 for plural wave guide antennas with lobe switching and subclasses 876 and 904 for antennas with switch.
455,	Telecommunications, subclasses 78+ for so-called T. R. switches connecting first the transmitter and then the receiver selectively to an antenna.

[List of Patents for class 335 subclass 5]

This subclass is indented under subclass 4. Subject matter wherein the device includes structure which peculiarly adapts it for use in the completion or disconnection of circuitry consisting of coaxial conductors.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 1+ , for multiple circuit control devices in which a plurality of contacts; which are not electromagnetically actuated, are arranged to switch two or more circuits.

[List of Patents for class 335 subclass 6]

This subclass is indented under subclass 2. Subject matter wherein the device comprises means whereby normally closed contacts are automatically interrupted upon the occurrence of an abnormal circuit condition in a circuit with which the device is designed to be used. The circuit interrupting device may be, by way of example, of any one of the types known as "air circuit breakers" or "oil circuit breakers", which circuit breakers may be of the "single-throw", "double-throw" or "multiple circuit breaker" type; provided, that at least one electromagnet is utilized as a means for operating the contacts to an open position upon the occurrence of an abnormal condition.

SEE OR SEARCH CLASS:

218,	High-Voltage Switches With Arc Preventing and Extinguishing Devices, subclasses 1+ and 22+, for circuit interrupting devices with nonmagnetic control means combined with magnetic blow out.
307,	Electrical Transmission or Interconnection Systems, particularly subclasses 39 , 86, 97, 116+, and 328 for condition responsive switching systems.
320,	Electricity: Battery or Capacitor Charging or Discharging, appropriate subclass for a circuit making or breaking device responsive to a predetermined condition in a battery charging or discharging circuit or a battery itself.
337,	Electricity: Electrothermally or Thermally Actuated Switches, appropriate subclasses for similar devices electrothermally or thermally controlled.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for devices similar to those to be found in Class 335 utilized in circuit safety or protective systems, particularly subclasses 91.1+ and 93.1+ which includes specific circuit breaker or relay structure.

[List of Patents for class 335 subclass 7]

This subclass is indented under subclass 6. Subject matter wherein the automatic circuit interrupting device comprises means responsive to plural diverse abnormal circuit conditions such as overload under voltage, etc. Usually the actuating means comprises separate devices each of which responds to a given predetermined condition and is operative either independently or in cooperation with another means. Some examples; (1) plural electromagnets one of which is voltage responsive and one of which is current responsive or (2) overload and underload coils.

SEE OR SEARCH THIS CLASS, SUBCLASS:

35+,	for significant trip structure of a combined nature such as magnetic and thermal, for instance.

SEE OR SEARCH CLASS:

307,	Electrical Transmission or Interconnection Systems, subclass 116 for condition responsive switching systems which may or may not be responsive to a plurality of conditions.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ and appropriate subclasses, for safety and protection systems and devices which may be responsive to a plurality of conditions in the systems.

[List of Patents for class 335 subclass 8]

This subclass is indented under subclass 6. Subject matter wherein the circuit interrupting device comprises a plurality of individual conductors with contact pairs associated with each conductor a contact pair actuating means for each contact pair, each contact pair completing a circuit through one conductor of a polyphase or plural conductor transmission line. Devices which are known as bipole or double pole and which complete the circuit in each conductor of a direct current circuit will also be found here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

102,	for polyphase switches designed to be actuated by alternating or fluctuating current and having a plurality of contacts whereby one polyphase input is connected to a similar polyphase output.
106,	for devices of the multiple contact type wherein a plurality of external circuits may be completed or opened either selectively or simultaneously by a magnetically actuated switch means.

SEE OR SEARCH CLASS:

307,	Electrical Transmission or Interconnection Systems, subclasses 13+ for polyphase systems in general which may include phase switches and subclasses 112+ for plural phase switching systems, especially subclass 127 for phase sequence responsive type.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for similar switching or circuit interrupting devices combined with safety and protective systems, particularly subclass 76 for such systems with phase sequence analyzer means.

9
	This subclass is indented under subclass 8. Subject matter wherein the device comprises individual latching or tripping means associated with each separate phase or leg contact pair thereof. The individual latch or trip means may operate individually on its corresponding contact pair of the circuit, or, may upon operation, actuate a tripping bar whereby the remaining contact pairs are opened.

10
	This subclass is indented under subclass 8. Subject matter wherein the interrupting device comprises a single latch or trip means whereby the plurality of phase or leg contacts pairs are simultaneously maintained in a first position until released whereupon the plurality of contact pairs are allowed to open simultaneously.

[List of Patents for class 335 subclass 11]

This subclass is indented under subclass 6. Subject matter wherein the automatic circuit interrupting means consists of two or more separate and distinct devices adapted to jointly or separately interrupt the continuity of a circuit to be controlled. The devices may be connected in series, tandem or any other desired arrangement provided there is single continuous circuit from a source to a load through the switch means. For example, each switch may be in one leg of a two conductor circuit.

(1) Note. The devices to found here differ from the multiple or polyphase devices in subclasses 8+ above, in that the subject matter relates to devices for interrupting a single polyphase circuit by a single switch means having at least one pair of contacts for each phase.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+,	for multiple or polyphase switches. See (1) Note above.
88+,	for plural periodic switches.
152,	for plural vacuum or hermetically sealed switches.
159+,	for plural electromagnetically actuated switches not specifically recited as automatic circuit interrupter devices and each being operative independently of the other.
206,	for plural permanent magnet actuated switches.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 5 for multiple circuit control devices constituting a plurality of switches.
307,	Electrical Transmission or Interconnection Systems, subclasses 113+ for switching systems comprising plural switches.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for safety and protection systems and devices which may include a plurality of interrupter devices and subclasses 139+ for electric circuits for relays and electromagnets particularly subclasses 160+ for plural relays and electromagnets.

[List of Patents for class 335 subclass 12]

This subclass is indented under subclass 6. Subject matter wherein the interrupting device structure includes auxiliary contacts or other significant means whereby an electrical shunt circuit is established to bypass either the main circuit contacts or the operating coil of the device, prior to the opening or closing of the main contacts, thereby preventing arcing and damage to either the main contacts or the operating coil.

SEE OR SEARCH THIS CLASS, SUBCLASS:

156,	for electromagnetically actuated switches combined with protective means.
201,	for magnetic switches with arc prevention means.
236+,	for electromagnetic relays with a shunt path for the magnetic flux.

SEE OR SEARCH CLASS:

218,	High-Voltage Switches With Arc Preventing and Extinguishing Devices, subclasses 1+ for nonmagnetically controlled switches with arc prevention means.
307,	Electrical Transmission or Interconnection Systems, subclasses 134+ , for switching systems with arc prevention or other switch contact operation facilitating means.
337,	Electricity: Electrothermally or Thermally Actuated Switches, subclasses 15+ for electrothermally actuated shunt circuit completion devices.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for protective devices with arc prevention, subclasses 54+ and 58 for electromagnetic device protection circuits with shunting or impedance insertion means.

[List of Patents for class 335 subclass 13]

This subclass is indented under subclass 6. Subject matter wherein the interrupting device structure includes at least one auxiliary switch means operative independently of the main circuit contacts whereby a circuit is completed through the electromagnetic operating coil of the contact actuating means or through some other operative element of the device such as a holding or tripping coil.

SEE OR SEARCH THIS CLASS, SUBCLASS:

12,	for similar structure wherein the auxiliary switch comprises shunting contacts.
157,	for electromagnetically actuated switches with holding magnets which may be actuated by a circuit extending through holding contacts.

[List of Patents for class 335 subclass 14]

This subclass is indented under subclass 6. Devices wherein the circuit interrupting means is directly connected to the movable contact or contacts and operable by the effect of a magnetic field through a movable armature, or other mechanical means responsive to the magnetic field of a flux source. That is the devices found in this subclass do not utilize a motion converting mechanism between the movable armature or core and the contacts. The devices classified here are, for the most part, of the class or apparatus generally shown as "cut outs".

(1) Note. To complete the search the various classes listed in the search notes under Class 317, subclass 9 should be consulted.

SEE OR SEARCH THIS CLASS, SUBCLASS:

68+,	for devices in which the contacts are motor operated.
78+,	for polarity responsive devices where at least one of the contacts may be directly carried by the armature.
87+,	for periodic switches where at least one movable contact is carried by a flexible armature.
147+,	for electrodynamically operated switches which cause the contacts to open directly.
203,	for armature structure significant to switches, in which the armature may comprise a contact bridging means.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclasses 1+ for safety and protection systems which may in general include cutouts.

[List of Patents for class 335 subclass 15]

This subclass is indented under subclass 6. Subject matter wherein the interrupting device comprises significant structure whereby the movable contact or contacts are biased either open or closed, the pressure between the contacts is controlled or regulated or by which the contacts are held in the operative condition and which structure is separate and distinct from the conventional latching devices customarily in use.

SEE OR SEARCH THIS CLASS, SUBCLASS:

157+,	for switching devices, not restricted to the automatic circuit opening function, having significant locking or holding structure.
188,	for snap action contact actuating means.
192,	for contact carrying on actuating structure with biasing means.
193,	for contact actuators with vibration, bounce or chatter prevention means.
194+,	for contact pressure maintaining or adjustment means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Maker and Breakers, appropriate subclasses for similar contact biasing or holding means for nonmagnetically actuated switches, especially subclass 170 for contact pressure adjustment switches.
307,	Electrical Transmission or Interconnection Systems, subclass 142 for miscellaneous switches having locking, holding or breaking means for the switch.
361,	Electricity: Electrical Systems and Devices, subclasses 170+ for relay systems having relays with contact pressure increasing means, and subclass 194 for relay systems having relays with holding means such as a locking contact.

16
	This subclass is indented under subclass 15. Subject matter wherein the significant biasing, holding or pressure control means consists of either a magnet or other device which depends for its operation on the reaction between current in one part of an electric circuit and the current in another part, such as a current loop for creating electrodynamic forces tending to separate or close the relatively movable contacts.

[List of Patents for class 335 subclass 17]

This subclass is indented under subclass 6. Subject matter wherein the circuit interrupting device includes signalling, indicating or alarm structure whereby the condition of the switch, whether open or closed, physically inoperative, etc., is automatically communicated to an operator or other interested observer by visual or audible means. In order to be classifiable in this subclass the signalling or indicating means must include structure in addition to an operating lever or other operating means whose position is dependent upon whether the contacts are open or closed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

156,	for electromagnetically operated switches with significant protective means for the switch itself or its contacts.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 167 for switches in general with indicators.
337,	Electricity: Electrothermally or Thermally Actuated Switches, appropriate subclasses for various types of electrothermal and thermally actuated switches with indicators.
340,	Communications: Electrical, subclasses 480+ for electromagnetically operated mechanical traffic or vehicle signals, subclass 523 for signalling devices responsive to the sequence of operation of plural circuit breakers, subclass 644 for a switch or relay condition signalling device without significant switch or relay structure, and subclasses 652 and 366+ for visual signals electromagnetically actuated.

[List of Patents for class 335 subclass 18]

This subclass is indented under subclass 6. Subject matter wherein the structure includes means automatically responsive specifically to predetermined current values in the circuit to be controlled or to some abnormal current condition in the circuit, such as current reversal, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

155,	for switching devices, which are not specifically claimed as automatic circuit interrupting devices, and having operative means responsive to predetermined current or voltage value.

SEE OR SEARCH CLASS:

307,	Electrical Transmission or Interconnection Systems, appropriate subclasses, particularly subclasses 125+ for miscellaneous switching systems responsive to electrical conditions.
318,	Electricity: Motive Power Systems, appropriate subclasses for motor control switches which may be responsive to predetermined condition or abnormal current or voltage value in a motor circuit.
337,	Electricity: Electrothermally or Thermally Actuated Switches, appropriate subclasses for electrothermal and thermally actuated switches, which may be set to operate at a predetermined current value.
340,	Communications: Electrical, subclasses 635+ for signals and alarms responsive to a predetermined condition of electrical apparatus.
361,	Electricity: Electrical Systems and Devices, subclasses 91.1+ and 93.1+ for safety and protection systems and devices responsive to predetermined condition such as voltage or reverse current.

19
	This subclass is indented under subclass 18. Subject matter wherein the automatically responsive means is designed to be actuated when the current in the circuit to be controlled falls to a zero value.

[List of Patents for class 335 subclass 20]

This subclass is indented under subclass 6. Subject matter wherein the structure includes means automatically responsive specifically to predetermined values, or some abnormal condition, of the voltage existing in the circuit to be controlled, such as, for example, over-voltage under-voltage or no voltage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

155,	for electromagnetic switches, not specifically claimed as automatic circuit interrupters, having means responsive to a predetermined voltage value.

SEE OR SEARCH CLASS:

307,	Electrical Transmission or Interconnection Systems, appropriate subclasses, particularly subclass 130 for switching systems which are voltage responsive.
361,	Electricity: Electrical Systems and Devices, subclasses 88+ for voltage responsive safety or protection systems, and subclasses 139+ for relay systems which may be responsive to predetermined voltage levels.

[List of Patents for class 335 subclass 21]

This subclass is indented under subclass 6. Subject matter wherein the structure includes significant details of operating means whereby the contacts may be restrained in a closed condition by a latch or detent which may be tripped by the action of a magnet or other means. The contacts are usually held in circuit closing position and tripped to open position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

167+,	for significant latch devices.
172+,	for tripping devices peculiarly adapted for use with electromagnetic switches but not restricted to automatic interrupters.
253+,	for electromagnet and armature in general with armature latch.

SEE OR SEARCH CLASS:

74,	Machine Element or Mechanism, for automatically controlled mechanisms.
200,	Electricity: Circuit Makers and Breakers, subclasses 12+ for dial type switches with electromagnetic release, subclasses 39+ for clock train operated switch with retarded latch trip, subclasses 411+, 415+, 470, 471, and 424 for snap switches with latch trip.
337,	Electricity: Electrothermally or Thermally Actuated Switches, subclasses 70+ for bimetallically controlled electrothermal switches with thermally controlled latch or trip means, 150+ for fusible element controlled switches with latch or trip means, 174 for fusible cut out devices with latch or trip means and 356 for thermally controlled switches with latch or trip means.

[List of Patents for class 335 subclass 22]

This subclass is indented under subclass 21. Subject matter wherein the significant latching or tripping structure comprises two or more separate means, whereby the contacts are maintained in a closed position until released or whereby the latching means is released and the contacts allowed to open, and each acting independently of the other. Devices in which the latching means comprises a main latch under the control of an auxiliary latch and in which the actuation of the main latch depends upon the condition of the auxiliary latch will not be found here but in the generic subclass 21 above.

SEE OR SEARCH THIS CLASS, SUBCLASS:

169,	for details of plural or combined latch means adapted for use with electromagnetic switches.
173,	for details of plural tripping means adapted for use with electromagnetic switches.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 39+ for nonmagnetically activated retarded switches with latch trip means, subclasses 70+ for double snap switches with latch trip, subclass 470, 471 for single snap with latch trip, subclass 78 for reciprocating contact snap switches with latch trip, and subclass 169 for latch structure.
337,	Electricity: Electrothermally or Thermally Actuated Switches, subclasses 71 and 175 for electrothermally actuated switches with combined latching or tripping means.

23
	This subclass is indented under subclass 22. Subject matter wherein the latching or tripping means consists of a plurality of means, each of which is operable upon a different principle, as for instance, one may be magnetic and the other mechanical, or one thermal and the other manual.

[List of Patents for class 335 subclass 24]

This subclass is indented under subclass 21. Subject matter wherein the device comprises, other than in name only, significant details of structure which is operative, upon the occurance of abnormal condition in the controlled circuit, to prevent the main contacts from remaining closed or the latch from functioning regardless of the operation of a closing means, or wherein the main contacts are automatically opened upon the occurrence of an abnormal circuit condition independently of the position of a manual or other contact closing means. One example of a device to be found here consists of a manually closed switch in which a mechanical latch is operated by a handle to maintain the contacts in closed condition, the latch being operated or tripped automatically by some overload condition even though the closing lever remains in the actuated condition.

(1) Note. Where the claim recites that the device is "trip-free", without any specific details of such a feature and then recites specific details of structure which would cause the patent to be placed in a more restricted subclass below, the original patent will be placed in the more restricted subclass and officially cross-referenced back in this subclass.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclasses 1+ for safety and protection systems may employ circuit interrupters which are nonreclosable.

[List of Patents for class 335 subclass 25]

This subclass is indented under subclass 24. Subject matter wherein the device includes significant structure whereby the operative connection between the main contact actuating means and the means for maintaining the contacts in a closed condition (latch) is disabled. The disabling means may include manual, gravity actuated, lost motion or magnetic devices.

SEE OR SEARCH THIS CLASS, SUBCLASS:

157+,

for switches with lock open structure for preventing the contacts from being actuated.

[List of Patents for class 335 subclass 26]

This subclass is indented under subclass 21. Subject matter wherein the structure includes significant means whereby after an automatic disconnection of the main contacts, upon the occurrence of a fault or surge in the circuit, the contacts are automatically reclosed to restore service in the event that the fault has been removed; or means whereby the latching mechanism is reset to an operative condition whereby the contact actuating means will be rigidly held in an operated condition upon the contacts being reclosed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

166,	for electromagnetically actuated switches in general with latch or trip resetting means.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclasses 71+ for safety and protective systems with means for subsequent automatic restoration of the system to a normal operative condition.

[List of Patents for class 335 subclass 27]

This subclass is indented under subclass 26. Subject matter wherein the structure includes significant means whereby the tripping operation is accomplished automatically and the reclosing or resetting operation is accomplished by manual means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

164,	for manual or gravity actuated latch with electromagnetic trip.

SEE OR SEARCH CLASS:

361,

Electricity: Electrical Systems and Devices, subclass 93.4 for abnormal current condition protection including automatic circuit reset after interruption of electric system, and subclass 114 for protective systems including means for manual and automatic opening of a breaker with manual reclosing means.

[List of Patents for class 335 subclass 28]

This subclass is indented under subclass 26. Subject matter wherein the reclosing or resetting structure is automatically operated and is combined with significant means whereby one or both operations take place after a time interval longer than the normal operating interval or after a fixed or predetermined interval which may be shorter than the normal interval.

SEE OR SEARCH THIS CLASS, SUBCLASS:

39+,	for magnetic latch or trip means with time delay means.
59+,	for electromagnetically actuated switches of the retarded or delayed type.
139,	for step-by-step switches with timing or index means.
218,	for temperature responsive magnets and electromagnets with time delay means.
239+,	for electromagnet with armature time delay movement control means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 33+ for nonmagnetically actuated switches of the retarded type.
307,	Electrical Transmission or Interconnection Systems, subclasses 14+ for switching systems with time delay or retardation means.
318,	Electricity: Motive Power Systems, and subclasses 445+ for automatic stopping and/or starting means with time delay.
361,	Electricity: Electrical Systems and Devices, subclass 91.3 for overvoltage protection with time delay means and subclasses 195+ for relay systems with time delay features.
388,	Electricity: Motor Control Systems, art collection 921 for motor control systems including time delay means.

[List of Patents for class 335 subclass 29]

This subclass is indented under subclass 28. Subject matter wherein the significant timing or delay means is fluid controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61,	for electromagnetically operated switches in general with pneumatic delay means.
62,	for electromagnetically operated switches in general with hydraulic delay means.
240,	for electromagnet with an armature movement control by the dashpot.

SEE OR SEARCH CLASS:

188,	Brakes, subclasses 266+ , for a fluid-resistance brake or shock absorber of general utility.
200,	Electricity: Circuit Makers and Breakers, subclass 34 for nonmagnetically actuated switches with dashpot retarding means and subclasses 81+ for fluid pressure actuated switches.
361,	Electricity: Electrical Systems and Devices, subclass 116 for systems utilizing pneumatically operated breakers.

[List of Patents for class 335 subclass 30]

This subclass is indented under subclass 28. Subject matter wherein the delay structure includes means whereby the time interval between the opening of the contacts and the reclosing thereof, the resetting of the latch, or the permanent opening (lockout) of the main contacts is controlled by a mechanical motor means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

64+,	for electromagnetically actuated switches of the retarded or delayed type utilizing a motor or motor controlled means.
139,	for step-by-step switch clock mechanism timing means.
239+,	for electromagnets with time delay armature movement control means.

SEE OR SEARCH CLASS:

178,	Telegraphy, subclass 76 for retarded circuit closers peculiar to telegraph circuits.
200,	Electricity: Circuit Makers and Breakers, subclasses 35+ for nonelectromagnetically operated switches of the retarded type and utilizing clocks, clock trains or similar gearing as a retarding means.
307,	Electrical Transmission or Interconnection Systems, subclasses 141+ for a switching system including a time delay or retardation means for controlling a switch actuation and which may include motor means.
337,	Electricity: Electrothermally or Thermally Actuated Switches, subclasses 51 , 81, 88, 127, 163, and 301 for electrothermal or thermally controlled switches with timing means which may be time controlled.
361,	Electricity: Electrical Systems and Devices, subclasses 71+ for systems including circuit breakers with time delay means including clock work.

[List of Patents for class 335 subclass 31]

This subclass is indented under subclass 28. Subject matter wherein the timing or delay structure includes means whereby the time interval between the opening of the contacts and the reclosing thereof, resetting of the latch or permanent opening (lockout) of the main contacts is controlled either wholly or in part by thermal means, such as a bimetallic element, for example.

SEE OR SEARCH THIS CLASS, SUBCLASS:

39+,	for circuit interrupters with magnetic latch or trip means which may include thermal time delay means.
66,	below for switches of the retarded or delayed type including thermally responsive delay means.
217+,	for electromagnet and armature with temperature responsive type delay means.

SEE OR SEARCH CLASS:

337,	Electricity: Electrothermally or Thermally Actuated Switches, subclass 301 for time controlled thermally responsive switches.
361,	Electricity: Electrical Systems and Devices, subclass 99 for safety protective systems utilizing combined thermal-electromagnetic devices.

[List of Patents for class 335 subclass 32]

This subclass is indented under subclass 28. Subject matter wherein the timing or delay structure includes counting or integrating means whereby the time interval between the initial opening and the final reclosing operation or final opening (lockout) of the main contacts comprises a cycle of opening and reclosing operations or whereby the circuit completing contacts are normally latched in closed condition and released by a counting mechanism adapted to respond to successive fault current impulses until a predetermined number of such pulses after which the latch is released allowing the contacts to open.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclasses 71+ for safety protective systems utilizing subsequent automatic restoring means.

33
	This subclass is indented under subclass 32. Subject matter wherein the timing or delay means includes significant structure whereby at least two of the cycles between the initial opening of the main contacts and the final opening or, lockout thereof, are of different duration. For example, the initial opening may be instantaneous while the succeeding cycles may be of longer duration or the initial opening may be delayed while the succeeding cycles may be of short duration.

[List of Patents for class 335 subclass 34]

This subclass is indented under subclass 32. Subject matter wherein the timing or delay means comprises significant structure whereby the main contacts are positively restrained from being reclosed after a given sequence of opening and reclosing operations.

SEE OR SEARCH THIS CLASS, SUBCLASS:

77,	for motor operated switches with significant locking means.
113,	for automatically actuated plural contact switches with locking or latching means.
157+,	for other electromagnetically actuated switches with lockout (open) means.

[List of Patents for class 335 subclass 35]

This subclass is indented under subclass 21. Subject matter wherein the trip structure contains significant details of more than a single tripping device each one of which is responsive to a different condition or in which each is actuated by means operating upon a different principle. Also devices in which the current in the winding of a magnetic trip device is controlled by a bimetal, or other thermal means, which may be heated in response to current flow are also classified here.

(1) Note. Generally the combination of a magnetic trip with a bimetallic means results in an instantaneous tripping action upon a large surge of current and a time delayed tripping action following a sustained overload.

SEE OR SEARCH THIS CLASS, SUBCLASS:

173,	for other electromagnetically actuated switches with plural significant diverse tripping means.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclasses 1+ for miscellaneous circuit breaker systems, and subclass 114 for safety and protective systems utilizing manual and automatic opening of a breaker.

36
	This subclass is indented under subclass 35. Subject matter wherein the combined trip structure includes at least one element of structure common to or forming an integral part of each one of the plural separate tripping means.

[List of Patents for class 335 subclass 37]

This subclass is indented under subclass 35. Subject matter wherein the trip structure includes at least one thermal element, which element acts as a winding or flux source for a magnetic device. Usually, in the patents classified here, the thermal element acts as a delayed tripping device while the magnetic device operates instantly upon excessive current in the thermal device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

141+,

for other electromagnetically operated switches with additional thermal current responsive means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 3 for multiple circuit control switches with thermal current responsive means.
361,	Electricity: Electrical Systems and Devices, subclass 99 for safety and protective systems including devices with combined thermal electromagnetic relay means, one of which may act instantaneously.

[List of Patents for class 335 subclass 38]

This subclass is indented under subclass 21. Subject matter wherein the trip structure consists wholly or exclusively of magnetically operated means. The trip means may consist of plural magnets acting conjointly, single magnet means with a plurality of armatures or any other magnetic structure so long as the operating means consists of magnetic means only.

(1) Note. For magnetic trip structure in general which performs the additional function of arc suppression or blow-out, the search should be extended to subclass 201 below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

174,	for electromagnetically actuated switches in general with significant magnetically actuated tripping means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 12+ for dial type multiple circuit controllers with electromagnetic release, subclass 404 for double snap switches with magnetic latch trip, subclass 404 for single switches with magnetic latch trip.
219,	Electric Heating, subclass 519 for automatically operated current connection or disconnection means for heating devices comprising electromagnetic relay means.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ and appropriate subclasses for safety and protective systems employing electromagnetic protective devices.

[List of Patents for class 335 subclass 39]

This subclass is indented under subclass 38. Subject matter wherein the trip structure includes significant means whereby the tripping operation is delayed for a predetermined interval of time after the occurrence of the circuit condition tending to cause such a tripping action. The significant time delay means may consist of a thermal or other restraining means, provided that, it acts directly upon the magnetically operated tripping means to thereby prevent the said magnetic means from performing a tripping operation during the period of restraint.

SEE OR SEARCH THIS CLASS, SUBCLASS:

35+,	for plural trips or combined operating means for a single trip.

[List of Patents for class 335 subclass 40]

This subclass is indented under subclass 39. Subject matter wherein the significant time delay structure includes means responsive to the degree of overload occurring in the controlled circuit. For instance, the device may contain a first magnetic winding or armature actuated instantaneously upon a short circuit occurring and another winding or armature responsive to a continuous overload.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclasses 94+ for safety and protective systems employing a device having time delay actuating means combined with instantaneous control (e.g., responsive to the extent of the fault).

41
	This subclass is indented under subclass 38. Subject matter wherein the magnetic flux producing winging of the magnetic trip structure either comprises a section of a conductor, which is directly in the controlled circuit or is connected in series with the main contacts.

[List of Patents for class 335 subclass 42]

This subclass is indented under subclass 38. Subject matter wherein the magnetic tripping means includes significant structure whereby the trip operating characteristics thereof may be adjusted or calibrated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

45,	for electromagnetic switch with adjustment or calibrating means for thermally actuated latch or trip means.
176,	for other electromagnetically actuated switches with adjustable magnetic tripping means.

[List of Patents for class 335 subclass 43]

This subclass is indented under subclass 21. Subject matter wherein the trip structure consists wholly or exclusively of thermally actuated means. The thermal member or members in the device may be inductively heated or directly heated by current in the controlled circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

35+,	for trip actuating means comprising thermal means plus some additional means such as magnetic, mechanical or manual, operating means.
141+,	for other electromagnetically actuated switches combined with thermal current responsive means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 3 for multiple circuit control switches with thermal current combined actuating means.
219,	Electric Heating, subclasses 494+ for automatically regulated or controlled power supply systems for electric heaters with thermally responsive control means and subclasses 510+ for thermally responsive automatic current connection or disconnection means for heating devices.
337,	Electricity: Electrothermally or Thermally Actuated Switches, appropriate subclasses for thermal current actuated switches with latch trip means.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for safety and protective systems with thermal control means and subclasses 161+ for electric circuits for relays and electromagnets utilizing thermally actuated means.

[List of Patents for class 335 subclass 44]

This subclass is indented under subclass 43. Subject matter wherein the significant tripping structure includes means whereby the thermal actuating means is compensated for changes in ambient temperature to prevent unwanted change in the operating characteristics thereof.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclass 140 for electric circuits for relays and electromagnets including means for compensating for thermal changes.

[List of Patents for class 335 subclass 45]

This subclass is indented under subclass 43. Subject matter wherein the trip structure includes means whereby the current value necessary to cause a response of the control device, of the trip means, or the electromagnetic force necessary to permit the actuation of the contacts to open or closed condition, may be regulated, readily adjusted or calibrated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

42,	for electromagnetic circuit interrupters with adjustment or calibration of magnetic latch or trip actuating means.
176,	for electromagnetic switches in general with adjustable magnetically operated trip means.

[List of Patents for class 335 subclass 46]

This subclass is indented under subclass 6. Subject matter wherein the interrupting device includes significant structure whereby (1) rebound of the contacts upon opening or closing (2) any undesirable actuation of the contacts from one condition to another, either in response to abnormal circuit conditions or by jar or shock, is prevented, or (3) whereby the operating mechanism may be positively locked against undesirable circuit opening and/or closing movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

157+,	for other electromagnetically actuated switches with locking or holding means.
193,	for significant contact actuating structure with vibration, bounce or chatter prevention means.
271,	for electromagnet with armature mounting means with bounce or vibration preventing means.
277,	for electromagnet with armature with shock absorption, vibration or bounce preventing means in general.

[List of Patents for class 335 subclass 47]

This subclass is indented under subclass 2. Subject matter wherein the structure includes means whereby at least one electrical circuit is completed through a conductive liquid, usually mercury.

(1) Note. For purposes of classification a conductive fluid comprising a fluid dielectric with copper or other electrical conductive particles in suspension therein is considered as a conductive liquid classifiable in this or the indented subclasses.

SEE OR SEARCH CLASS:

200,

Electricity: Circuit Makers and Breakers, subclass 32 for periodic switches of the liquid contact type; subclass 81.6 for fluid pressure operated switches of the liquid contact type; and subclass 152 for nonelectromagnetically controlled switches in general utilizing liquid contacts.

(1) Note. Class 200, subclass 152 is the generic place for liquid contact (mercury) switches. To complete the search for this subject matter the search notes under that subclass definition should be consulted.

324,

Electricity: Measuring and Testing, subclasses 92+ for devices for measuring, testing or sensing electricity, per se, and utilizing fluid conductors.

337,

Electricity: Electrothermally or Thermally Actuated Switches, subclasses 21, 114+, 306+, particularly subclasses 331 and 373 for electrothermal or thermally controlled switches utilizing liquid contacts.

361,

Electricity: Electrical Systems and Devices, subclasses 500+ for electrolytic current interrupting systems and devices.

[List of Patents for class 335 subclass 48]

This subclass is indented under subclass 47. Subject matter wherein the structure includes a plurality of three or more electrodes through which a current may enter or leave the liquid or other contact means whereby at least two or more external electrical circuits may be completed through the device.

(1) Note. Devices which, in fact constitute a plurality of separate mercury switches supported in a single group and which, may or may not depend upon a single magnet for actuation, are considered to come within the above subclass definition as special mercury switches. Devices of this type will have the original placed here and an official cross-reference placed in subclasses 159+ below.

(2) Note. Normally patents having the original classified here or in any other of the special type groups below will not be crossed down into the general multiple contact subclasses 106+ below, unless the disclosed subject matter discloses contact structure which may be of general utility in switches other than the special type with which it is disclosed or claimed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+,	for automatic circuit interrupters of the polyphase or multiple type.
11,	for automatic circuit interrupters of the plural switch type.
60,	for retarded or delayed type electromagnetically actuated switches which complete plural circuits alternately, consecutively or selectively.
72,	for switches with plural contacts.
88+,	for periodically operative switches with means for completing plural circuits.
106+,	for multiple type switching devices not restricted to the specific types listed above.
152,	for plural vacuum or sealed switches.
159+,	for plural switches.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 1+ , for multiple circuit switches in general, subclasses 19.06+ for periodic switches of the multiple contact type, and subclass 32 for periodic switches with liquid contact.

[List of Patents for class 335 subclass 49]

This subclass is indented under subclass 47. Subject matter wherein the structure includes means whereby an electrical circuit, or circuits, is completed when the conductive liquid is displaced from a first position in which the continuity of a conductive path between two or more electrodes is interrupted to a second position in which the path is completed through the liquid, the condition of the controlled circuit at all times being dependent upon the position of the liquid. The displacement means is generally of the magnetically controlled plunger type but may consist of means for tilting the chamber holding the liquid.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 32 for periodic switches with liquid contacts, subclass 80 for centrifugal switches which may use a displaceable liquid conductor for performing circuit controlling operations, and subclass 152 for nonelectromagnetically operated mercury switches in general.
337,	Electricity: Electrothermally or Thermally Actuated Switches, subclass 21 for electrothermal switches utilizing physical changes in a conductive fluid.

[List of Patents for class 335 subclass 50]

This subclass is indented under subclass 49. Subject matter wherein the structure includes at least two separate wells or containers each of which is adapted to hold at least a portion of the conductive fluid and in which the condition of the external circuit depends upon the presence of, or the amount of, liquid in one or the other or both containers.

SEE OR SEARCH CLASS:

338,	Electrical Resistors, subclasses 80+ for liquid resistor devices, especially subclass 81 wherein an electrode is separable from the liquid for switching and subclass 94 for devices for varying a resistance by means of a device having contacts adapted to be closed by a liquid.

51
	This subclass is indented under subclass 49. Subject matter wherein the liquid displacement structure includes magnetic flux generating means acting either directly upon the liquid or upon other means such as a piston or plunger which in turn acts to displace the liquid.

[List of Patents for class 335 subclass 52]

This subclass is indented under subclass 51. Subject matter wherein the magnetically actuated liquid displacement means comprises a plunger or piston acting upon the liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56,	for conductive liquid activities utilizing an armature structure comprising a freely floating slug or mass.

[List of Patents for class 335 subclass 53]

This subclass is indented under subclass 52. Subject matter wherein the structure includes a means in addition to the plunger whereby the circuit to be controlled may be maintained open or closed for predetermined interval of time.

SEE OR SEARCH THIS CLASS, SUBCLASS:

28+,	for automatic circuit interrupters with latch or trip with timing means for reclosing or resetting.
39+,	for automatic circuit interrupters with magnetic latch or trip control of the time delay type.
59+,	for other electromagnetically actuated switches with time delay means.
139,	for step-by-step switches with timing or indexing means.
218,	for magnets or electromagnets of the temperature responsive type with time delay means.
239+,	for electromagnet with time delay armature movement control means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 33+ for nonmagnetically actuated switches with time delay.

[List of Patents for class 335 subclass 54]

This subclass is indented under subclass 49. Subject matter wherein the liquid displacement means includes structure whereby liquid displacement is accomplished by tilting or rotating a chamber containing the liquid.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 17 for operating devices for plural circuit control switches which may utilize tiltable mercury tube means, subclass 32 for periodic switches (flashers) utilizing tiltable liquid conductor tube means, subclass 84 for float type switches having tiltable switches which may be of the liquid contact type, actuated by the motion of the float and subclass 152 for liquid contact switches which may be tiltable.
318,	Electricity: Motive Power Systems, subclasses 119+ for oscillating motors which may be controlled by a tiltable mercury switch.
340,	Communications: Electrical, subclass 331 for flashers which may utilize tiltable mercury switches.
361,	Electricity: Electrical Systems and Devices, subclasses 160+ for thermal switches which may utilize tiltable mercury devices and forming an element of electrical circuits for relays or electromagnets.
455,	Telecommunications, subclasses 230+ for selective control mechanism for radio receivers which may utilize tiltable mercury switch means.

[List of Patents for class 335 subclass 55]

This subclass is indented under subclass 47. Subject matter wherein the device includes significant armature structure, not comprised of the liquid itself, and whereby at least one movable contact is caused to complete an electrical circuit through the medium of a conductive liquid. The liquid may comprise the fixed contacts or electrodes or may be retained in a reservoir from which the fixed contacts are wetted by capillary or other action.

SEE OR SEARCH CLASS:

313,	Electric Lamp and Discharge Devices, subclass 150 for space discharge devices with at least one movable contact cooperating with a liquid electrode and subclasses 163+ for liquid electrode discharge devices.

[List of Patents for class 335 subclass 56]

This subclass is indented under subclass 55. Subject matter wherein the armature structure comprises a globule, a metallic slug or other mass of material movable in a fluid and responsive to a magnetic field and freely movable within the magnetic field in such a manner as to complete or open an electric circuit between contacts and entirely free of any mechanical securing means. The fluid may be air, nonconductive liquid or the conductive liquid itself.

SEE OR SEARCH THIS CLASS, SUBCLASS:

49+,	for liquid displacement type conductive liquid switches, especially subclasses 52+ wherein magnetically moved piston or plungers are utilized.
82,	for polarity responsive electromagnetic switches with floating armature (i.e., no fixed pivot).
280,	for armature structure comprising balls, filings or granular material.

[List of Patents for class 335 subclass 57]

This subclass is indented under subclass 47. Subject matter wherein the device includes significant contact or electrode structural details.

SEE OR SEARCH THIS CLASS, SUBCLASS:

83,	for polarized switches with significant contact structure.
97,	for periodic switches with significant contact structure.
133+,	for multiple contact type switches with significant contact structure.
154,	for vacuum (reed) switches with significant contact or contact actuating means.
196+,	for significant contact structure not peculiar to any of the specialized types above.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 166 for switch contact details.

58
	This subclass is indented under subclass 57. Subject matter wherein the significant contact or electrode structure includes a mercury pool or a metallic member wetted with liquid mercury.

[List of Patents for class 335 subclass 59]

This subclass is indented under subclass 2. Subject matter wherein the device includes significant structure whereby the timing of the opening or closing of the switch contacts of the device takes place at an appreciable interval or intervals of time after an actuating force is applied to the contact actuating means or the timing is effected by varying the energizing current applied to the magnetic winding of the device.

(1) Note. For devices which automatically interrupt an electrical circuit upon the occurrence of an abnormal condition arising in the circuit to be controlled and having timing or delay means, see subclasses 6+ above.

SEE OR SEARCH THIS CLASS, SUBCLASS:

28+,	for automatic circuit interrupters with latch or trip means with timing means for reclosing or resetting.
39+,	for automatic circuit interrupters with magnetic latch or trip control of the time delay type.
139,	for step-by-step switches with timing or indexing means.
218,	for magnets or electromagnets of the temperature responsive type with time delay means.
239+,	for electromagnet with time delay armature movement control means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 33+ for nonmagnetically actuated switches with time delay means.
219,	Electric Heating, subclasses 492+ for automatic regulating or control systems for heating devices utilizing timing or cycling means.
307,	Electrical Transmission or Interconnection Systems, subclasses 141+ for switch actuation means with time delay or retardation means.
315,	Electric Lamp and Discharge Devices: Systems, subclass 360 for time controlled electric lamp and discharge device systems.
318,	Electricity: Motive Power Systems, subclasses 141 , 283+, 484+, 700+, and 727+ for various motor control switching systems with time delay means.
320,	Electricity: Battery or Capacitor Charging or Discharging, subclasses 155+ for a battery charging circuit with time control.
322,	Electricity: Single Generator Systems, subclass 18 for automatic control of generator or driving means having time delay in response.
337,	Electricity: Electrothermally or Thermally Actuated Switches, subclasses 301+ for thermally actuated switches with time control means.
340,	Communications: Electrical, subclass 815.3 for visual signalling devices with means for self cancelling after a fixed time interval.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for safety and protective systems with time delay means, and subclasses 160+ for electric circuits for relays and electromagnets with time delay.
388,	Electricity: Motor Control Systems, art collection 921 for motor control systems including time delay means.

[List of Patents for class 335 subclass 60]

This subclass is indented under subclass 59. Subject matter wherein the device comprises means whereby a plurality of two or more electric circuits are adapted to be energized alternately, consecutively or selectively.

(1) Note. For multiple contact switches in general, such as automatic telephone switches, but not involving time delay, search subclasses 107+ below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+,	for automatic circuit interrupters of the multipole or polyphase type.
11,	for automatic circuit interrupters of the plural switch type.
48,	for conductive liquid switches with three or more contacts.
72,	for motor actuated switches with three or more contacts.
88+,	for periodic or vibratory switches with plural pairs of contacts.
107+,	for multiple contact switches in general of the selectively sequentially, alternatively or intermittently actuated type. See (1) Note above.
152,	for vacuum or hermetically sealed type plural switches.
159+,	for plural independently operative switches in general.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 37 for multiple contact rotary retarded switches.

[List of Patents for class 335 subclass 61]

This subclass is indented under subclass 59. Subject matter wherein the delay structure comprises pneumatic means such as a dashpot, bellows, suction cup, etc., utilizing air or other gaseous fluids.

SEE OR SEARCH THIS CLASS, SUBCLASS:

29,	for automatic circuit interrupters with latch or trip reclosing or resetting means utilizing fluid delay means.
62,	for retarded or delayed switches utilizing hydraulic delay means.
240,	for electromagnet with associated dashpot delayed armature.

SEE OR SEARCH CLASS:

188,	Brakes, subclasses 266+ , for a fluid-resistance brake or dashpot of general utility.
200,	Electricity: Circuit Makers and Breakers, subclass 34 for nonmagnetically actuated switches with dashpot retarding means.
318,	Electricity: Motive Power Systems, and subclass 485 for automatic motor control means with dashpot control.
388,	Electricity: Motor Control Systems, art collection 921 for motor control systems including time delay means.

[List of Patents for class 335 subclass 62]

This subclass is indented under subclass 59. Subject matter wherein the delay structure comprises means, operable under the influence of a liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

29,	for automatic circuit interrupters with latch or trip reclosing or resetting means utilizing fluid delay means.
61,	for retarded switches utilizing pneumatic delay means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 81+ for fluid pressure operated switches.
307,	Electrical Transmission or Interconnection Systems, subclass 118 for switching systems with fluid condition responsive means and subclass 144 for fluid pressure switch actuating means.
318,	Electricity: Motive Power Systems, and subclass 485 for other automatic motor control means with dashpot or other mechanical delay means.
388,	Electricity: Motor Control Systems, art collection 921 for motor control systems including time delay means.

[List of Patents for class 335 subclass 63]

This subclass is indented under subclass 59. Subject matter wherein the delay structure comprises magnetic means, per se, or mechanical elements which are magnetically controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

38+,	above, for automatic circuit interrupter devices with magnetic trip means with time delay.

SEE OR SEARCH CLASS:

318,	Electricity: Motive Power Systems, and subclass 487 for automatic motor control switches with electromagnetic time delay means.
388,	Electricity: Motor Control Systems, art collection 921 for motor control systems including time delay means.

[List of Patents for class 335 subclass 64]

This subclass is indented under subclass 59. Subject matter wherein the delay structure comprises mechanical or inertia means or a mechanical movement.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 33+ for mechanically retarded switches in general.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for electromagnetic safety and protection systems with mechanical time delay means and subclasses 160+ for electric circuits for relays and electromagnets with mechanical time delay means.

[List of Patents for class 335 subclass 65]

This subclass is indented under subclass 64. Subject matter wherein the mechanical delay means comprises separate and independent motor means. The motor may be either electric or spring driven.

(1) Note. Delay devices which are operated by an induction vane driven by the contact actuating magnet, or other magnet means forming a component of the switch, are classified in subclass 63 above.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30,	for automatic circuit interrupters with trip reclosing or resetting means utilizing mechanical motor delay control.
68+,	below, for switches wherein the actuation of the main contacts is under the control of an electric motor.

SEE OR SEARCH CLASS:

185,	Motors: Spring, Weight, or Animal Powered, appropriate subclasses for mechanical motors, per se, of the weight or spring actuated type.
200,	Electricity: Circuit Makers and Breakers, subclasses 35+ for switches of the retarded type with motor driven clock train means.
318,	Electricity: Motive Power Systems, and subclass 486 for automatic stopping or starting switches with pilot or servo-motor time delay means.
388,	Electricity: Motor Control Systems, art collection 921 for motor control systems including time delay means.

[List of Patents for class 335 subclass 66]

This subclass is indented under subclass 59. Subject matter wherein the delay structure comprises means whereby the desired time interval transpiring between the application of a control signal and the contact actuation is determined by the heating of a thermal element, such as a bimetallic element for example, by an electric current.

(1) Note. The subject matter to be found here is directed to the delay means for electromagnetically actuated switches. Where the switch actuator is thermal, classification of the thermal current actuated switches is in Class 200, subclasses 113+ and of the thermal actuated switches, is in Class 337, appropriate subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

31,	for automatic circuit interrupters with latch or trip reclosing or resetting means utilizing thermal delay means.
35+,	above, for combined trip structure, for circuit interrupting devices, with one means being thermal.
39+,	for magnetic trip structure with thermal delay means.
43+,	for thermal trip structure.
141+,	for electromagnetic switch control means combined with thermal means.

SEE OR SEARCH CLASS:

307,	Electrical Transmission or Interconnection Systems, subclass 117 for condition responsive switching systems responsive to light, heat, vibratory or radiant energy.
322,	Electricity: Single Generator Systems, subclass 33 for automatic control means for a generator or driving means which is responsive to thermal conditions.
337,	Electricity: Electrothermally or Thermally Actuated Switches, appropriate subclasses. See (1) Note above.
361,	Electricity: Electrical Systems and Devices, subclasses 23+ for thermal protective devices, subclass 99 for safety and protection devices with combined thermal and electromagnetic relay delay means, and subclasses 160+ for thermal control means in electric circuits for relays and electromagnets.
374,	Thermal Measuring and Testing, subclasses 187+ for expanding solid type and subclasses 201+ for expanding fluid thermometric devices in general.

[List of Patents for class 335 subclass 67]

This subclass is indented under subclass 59. Subject matter wherein the delay structure includes adjusting or regulating means whereby the time delay interval transpiring before the opening and or closing operation may be varied or controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

45,	for automatic circuit interrupters with latch or trip means utilizing adjustable thermal actuators.

[List of Patents for class 335 subclass 68]

This subclass is indented under subclass 2. Subject matter wherein the electromagnetic switch operating mechanism comprises or includes an electric motor or the combination of electromagnetic means with at least one rotating motor means, in addition to the electromagnetic means, whereby the main contacts are caused to be operated to either the open or closed position. The additional motor means may consist of a spring motor operatively connected with an electromagnet.

(1) Note. The electric motor structure to be found in this and the indented subclasses may be either of the direct current or alternating current variety. No effort has been made to distinguish between A.C. and D.C. in this subclass, the motor being merely the significant means for driving a particular class of switch. For alternating current switches of general utility without motor means the search will be in subclasses 99+ below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30,	for automatic circuit breakers with mechanical motor controlled trip or latch.
65,	for switches with motor controlled delay means.
118,	for automatically actuated multiple contact switches of the telephone type which are motor driven.

SEE OR SEARCH CLASS:

185,	Motors: Spring, Weight, or Animal Powered, for mechanical motors, per se, of the weight or spring actuated type.
200,	Electricity: Circuit Makers and Breakers, subclasses 17+ for nonmagnetically operated multiple circuit control devices with motor operating means, subclasses 19.03+, 19.07+ and 19.18+ for rotary periodic switches, subclass 48 for significant structure comprising motor and related mechanisms rotatable to operate high potential electric switches, subclass 80 for centrifugal switches which may be motor driven and subclass 155 for rotating mechanical switches.
246,	Railway Switches and Signals, subclass 99 for automatic railway block signalling systems which are clock work controlled, subclasses 221+ for electric motor systems for signal switch actuation, e.g., see also subclasses 102, 103 and 263 for mechanical motor systems.
310,	Electrical Generator or Motor Structure, appropriate for specific electric motor structures.
315,	Electric Lamp and Discharge Devices: Systems, appropriate subclasses for specific electric motor control systems.

[List of Patents for class 335 subclass 69]

This subclass is indented under subclass 68. Subject matter wherein the motor structure is reversible in direction or oscillates cyclically about a center position first in one direction and then the other.

SEE OR SEARCH CLASS:

318,

Electricity: Motive Power Systems, appropriate subclasses for motor reversing systems. For example, see subclass 10 for particular motor driven load devices with reversible drive mechanism, subclasses 119+ for reciprocating or oscillating motor control systems and subclasses 280+ for motive power systems with motor reversing means.

[List of Patents for class 335 subclass 70]

This subclass is indented under subclass 68. Subject matter wherein the motor structure is either responsive to a predetermined frequency of the signalling or actuating current or operates at a speed corresponding to the frequency of the actuating current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

94,	for periodic switches with vibratory reeds tuned or resonant at a particular frequency.
101,	below, for alternating current responsive switches which are synchronous frequency responsive.

SEE OR SEARCH CLASS:

318,	Electricity: Motive Power Systems, appropriate subclasses, for electric motors having means for varying or adjusting frequency of the current applied thereto usually for speed control. See subclass 503 and the search notes thereunder for the general field of search for motors with armature current frequency or pulsation control.
334,	Tuners, subclasses 20+ for motor operated tuners, particularly subclass 21 for predetermined frequency selector tuners.
361,	Electricity: Electrical Systems and Devices, subclass 113 for safety and protective systems which are frequency responsive and subclasses 182+ for relay systems which are frequency responsive.

[List of Patents for class 335 subclass 71]

This subclass is indented under subclass 68. Subject matter wherein the device includes significant structure operated by the motor whereby the main contacts are actuated to or from an opened or closed condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

114,	for plural contact telephone type switches with automatic rotary contact selecting means.
118,	for motor driven automatic selector means.
121+,	for significant means for actuating a plurality of contacts selectively, cyclically, alternately or intermittently.
185+,	for other significant contact actuating structure.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, appropriate subclasses for rotary type contact actuating mechanisms, particularly subclasses 178+ for automatic telephone type switches with rotary contact selecting or actuating means.

[List of Patents for class 335 subclass 72]

This subclass is indented under subclass 71. Subject matter wherein the significant contact actuating structure comprises means whereby a plurality of external electrical circuits may be selectively completed by the device or in which a plurality of fixed contacts are selectively connected to one or more movable contacts by motor driven means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

118,	for multiple contact telephone type selector switch devices which are motor driven.
121+,	for plural contact type electromagnetically operated switches with other significant contact actuating means.

SEE OR SEARCH CLASS:

200,

Electricity: Circuit Makers and Breakers, subclasses 4 and 6+ for multiple circuit pivoted contact switches; subclasses 19.07+ for nonmagnetically actuated periodic switches with plural contacts; subclass 37 for clock train actuated rotary switches of the multiple contact type and subclasses 178+ for telephone type selector switches having a plurality of contacts adapted to be actuated by a motor driven selector means.

[List of Patents for class 335 subclass 73]

This subclass is indented under subclass 71. Subject matter wherein the contact actuating structure includes eccentric or cam means whereby at least one movable contact is actuated directly.

(1) Note. For devices in which the movable contact or contacts are actuated by a spring or other energy storage means after the spring has been wound or cocked by means of a motor driven cam the search is in subclass 76 below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

190,	below, for other significant contact actuating structure comprising cam, roller or eccentric means.

SEE OR SEARCH CLASS:

200,

Electricity: Circuit Makers and Breakers, subclasses 19.03+ for combined rotary and cam operated periodic switches, subclasses 19.13+ for cam operated multiple contact periodic switches, subclasses 19.20+ for cam operated periodic switches, subclass 38 for clock train, cam actuated retarded switches.

[List of Patents for class 335 subclass 74]

This subclass is indented under subclass 71. Subject matter wherein the contact actuating structure includes braking, clutch or detent means between the driving motor and the driven movable contact or contacts whereby the speed of the opening or closing operation, the interval during which the driving and the driven means are connected or the degree of contact pressure may be controlled or whereby the device may be independently manually controlled.

SEE OR SEARCH CLASS:

188,	Brakes, appropriate subclasses for mechanical brake structures and operating means therefor.
192,	Clutches and Power-Stop Control, appropriate subclasses for clutches, motor and clutch control and power stop controls.
200,	Electricity: Circuit Makers and Breakers, subclass 180 for telephone type selector switches with clutch controlled rotary motion.
307,	Electrical Transmission or Interconnection Systems, subclass 142 for switching systems including switch actuating structure with braking means.
310,	Electrical Generator or Motor Structure, subclasses 92+ for torque transmitting clutches or brakes.

[List of Patents for class 335 subclass 75]

This subclass is indented under subclass 74. Subject matter wherein the brake, clutch or detent means is magnetically operated.

SEE OR SEARCH CLASS:

310,	Electrical Generator or Motor Structure, subclasses 103+ for torque transmitting clutches or brakes of the magnetic field type.

[List of Patents for class 335 subclass 76]

This subclass is indented under subclass 71. Subject matter wherein the contact actuating structure includes, mechanical energy storage means whereby the movable contact or contacts are actuated to or from the closed position, the energy storage taking place through the agency of a motor wound spring or other kinetic energy device. The energy storage means may actuate the contacts through mechanical gearing which comprises in itself all the elements of a spring motor; for example, a clock movement actuated switch is considered a motor driven switch for classification here provided the spring is recharged by electric motor means. The storage means may also consist of inertia means released by a motor and transmitting energy via the force of gravity.

SEE OR SEARCH THIS CLASS, SUBCLASS:

14,	for automatic circuit interrupting devices which may utilize a core armature moving under the influence of the force fo gravity.
30,	for automatic circuit interrupters with mechanical motor controlled latch or trip reclosing or resetting means.
65,	for motor controlled (e.g., clockwork) switch actuation delay means.
116,	for multiple contact telephone type switches with gravity actuated selector restoring means.

SEE OR SEARCH CLASS:

185,	Motors: Spring, Weight, or Animal Powered, subclasses 4+ for plural weight actuated motors, subclasses 9+ for plural spring actuated motors, subclasses 27+ for weight actuated motors, per se, and subclasses 37+ for spring motors, per se.
200,	Electricity: Circuit Makers and Breakers, subclasses 17+ for plural circuit control switches with significant operating means, subclasses 35+ for clock train actuated retarded switches, subclasses 85+ for weight actuated switches and subclasses 502+ for mechanical switch actuating means.
246,	Railway Switches and Signals, subclasses 221+ for motor systems for railway electric switch and signal actuation which may employ energy storage means.
307,	Electrical Transmission or Interconnection Systems, subclasses 139+ for switching systems having switches with particular actuation means which may include energy storage means.
318,	Electricity: Motive Power Systems, subclasses 445+ especially subclasses 457 and 462, for automatic motor control switches with energy storage means.

[List of Patents for class 335 subclass 77]

This subclass is indented under subclass 68. Subject matter wherein the structure includes significant means whereby the contacts or the contact actuating means may be positively locked or latched to prevent any desired movement during the existence of a predetermined condition of the switch, such as open or closed. The locking or latching means will generally be provided with tripping structure to allow the latch to be released upon the termination of the predetermined condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

21+,	above, for automatic circuit interrupters with significant latch or trip means.
113,	for multiple contact switches with holding, locking or latching means.
157+,	for significant locking or holding structure.
167+,	for other electromagnetically actuated switches with significant latch means.
172+,	for switches with tripping means.
253+,	for electromagnet and armature with armature latch means.

[List of Patents for class 335 subclass 78]

This subclass is indented under subclass 2. Subject matter wherein the structure comprises circuit connection devices in which the movement of an armature depends upon the direction of the voltage or current flowing in the circuit controlling the armature. Usually the devices comprise an operating magnet associated with a permanent magnet or a constantly-energized electromagnet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

179,	for electromagnetic actuated switches employing a permanent magnet in addition to an electromagnet.
222,	for relatively movable coil and permanent magnet.
229+,	for magnets and electromagnets with armature utilizing permanent magnets, especially subclasses 230+ for the polarized type.

SEE OR SEARCH CLASS:

178,	Telegraphy, subclass 93 for polarized code receivers and subclasses 101+ for telegraph keys involving a polarized relay.
310,	Electrical Generator or Motor Structure, subclasses 152+ for the structure of rotary dynamo-electric machines with permanent magnets.
318,	Electricity: Motive Power Systems, subclasses 555+ for three or more position motor controlled systems which may be electromagnetically actuated and may employ polarized relays.
361,	Electricity: Electrical Systems and Devices, subclass 76 for protective systems with phase sequence analyzer; subclass 77 for protective systems responsive to reverse phase; subclasses 78+ for protective systems of the reverse energy or reverse current type; and subclass 208 for electrical control circuits for polarized relays and electromagnets.

[List of Patents for class 335 subclass 79]

This subclass is indented under subclass 78. Subject matter wherein the switch comprises within itself or forms an essential component of, a device into which information, in the form of an electric signal, can be introduced for extraction at a latter time, the switch being transferred to one or the other of its conditions depending upon the polarity of the energization current and remains in that condition subsequent to deenergization until reset.

(1) Note. The subject matter to be found here relates only to devices which essentially comprise a switching means whereby an interval of time occurs between the application of an input signal and the eventual completion of a circuit between input and output terminals or wherein the contacts are closed upon the application of a pulse of one polarity and held closed until the subsequent application of a pulse of another polarity.

SEE OR SEARCH THIS CLASS, SUBCLASS:

157+,

for other electromagnetically actuated switches with locking or holding means.

SEE OR SEARCH CLASS:

307,	Electrical Transmission or Interconnection Systems, subclasses 401+ for magnetic storage devices.
326,	Electronic Digital Logic Circuitry, appropriate subclasses for a transistorized logic circuit.
327,	Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, subclasses 185+ for a miscellaneous stable state circuit such as a bistable circuit.
365,	Static Information Storage and Retrieval, appropriate subclass for read/write storage systems comprising magnetic storage elements.

[List of Patents for class 335 subclass 80]

This subclass is indented under subclass 78. Subject matter wherein the device includes significant armature structure specifically adapted for use in a polarity responsive device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

95+,	for armature structure for periodic switches.
203,	for significant armature structure for electromagnetically actuated switches.
232+,	234 and 235, for significant armature structure in polarized electromagnet with armature.
279+,	for armature shape, structure and material.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclass 208 for electric circuits for a polarized relay which relay may have significant armature structure.

[List of Patents for class 335 subclass 81]

This subclass is indented under subclass 80. Subject matter wherein the significant armature structure includes means whereby the armature is supported in such a manner as to be freely movable within an axial cavity of a coil or within the flux field set up between pole faces. The motion may be rotary around an axis or may be generally parallel with the axis of the coil or in a plane in the direction of the axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

270+,

for relays with significant armature mounting means.

[List of Patents for class 335 subclass 82]

This subclass is indented under subclass 80. Subject matter wherein the armature is not permanently attached at a fixed point, therefore, being free to move in each of several directions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56,	for conductive liquid switches having armature comprising a freely movable floating slug or mass.
280,	for significant armature structure comprising a ball, granular material or magnetic filings.

[List of Patents for class 335 subclass 83]

This subclass is indented under subclass 78. Subject matter wherein the device includes significant contact structure or composition particularly adapted for use in a polarized type switch.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56+,	for switches utilizing conductive liquid with particular contact or electrode structure.
94,	for periodic switches with particular contact arrangement or composition.
133+,	for multiple contact switches with particular contact structure or arrangement.
196+,	for other significant contact structure not peculiarly adapted to a particular type switch.

[List of Patents for class 335 subclass 84]

This subclass is indented under subclass 78. Subject matter wherein the device includes significant magnetic structural elements or materials of construction and which are particularly applicable to polarized systems.

SEE OR SEARCH THIS CLASS, SUBCLASS:

227,	for saturable electromagnet with armature.
230+,	for permanent magnet polarized electromagnet with armature.
296+,	for significant magnetic structure or compositions and not peculiarly adapted for a specific type switch or relay.

[List of Patents for class 335 subclass 85]

This subclass is indented under subclass 84. Subject matter wherein the significant magnetic structure recited comprises particular pole structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

281,	below, for other significant magnetic pole structure.

[List of Patents for class 335 subclass 86]

This subclass is indented under subclass 78. Subject matter wherein the structure includes means whereby some feature of the device, such as the air gap, pole pieces, contacts, value of the actuating current or armature neutral position, may be adjusted or regulated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

212,	for electronic and ionic beam deflecting magnets or electromagnets with adjustable magnetic element.
298,	for magnet core structure in general with movable or adjustable core.

[List of Patents for class 335 subclass 87]

This subclass is indented under subclass 2. Subject matter wherein the device comprises means whereby a circuit is completed and broken intermittently or cyclically at constantly recurring intervals under the influence of a magnetic flux field.

(1) Note. The switches found here and in the indented subclasses below are analogous to the converters (choppers) utilized in Class 363, subclasses 106+ and subclass 124 where the circuit interrupter forming a component of a Class 363 system is defined as a "periodic switch".

SEE OR SEARCH THIS CLASS, SUBCLASS:

107+,	below, for multiple contact type switches having plural contacts which are selectively, cyclically, alternately or intermittently actuated.
151+,	for hermetically sealed reed switches which may be cyclically actuated.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 19.01+ for periodic circuit breakers generally.
307,	Electrical Transmission or Interconnection Systems, subclass 132 for repetitive make and break switching systems.
310,	Electrical Generator or Motor Structure, subclasses 15+ for reciprocating or vibrating electric motors comprising a magnet, an armature and a contact arrangement causing vibration or periodic motion of the armature when the magnet circuit is closed.
315,	Electric Lamp and Discharge Devices: Systems, subclasses 209+ for systems having a periodic switch in the supply circuit of a load or loads.
318,	Electricity: Motive Power Systems, subclass 37 for plural reciprocating or oscillating electric motor systems and subclasses 119+ for single reciprocating or oscillating motor systems, especially indented subclass 134 for motor systems with circuit making or breaking devices in the energizing circuit.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for circuit interrupting systems, subclasses 139+ for periodic circuits for relays and electromagnets, and subclasses 245+ for automatic pole changers.
363,	Electric Power Conversion Systems, subclass 110 for an inverter system comprising a vibrator means.

[List of Patents for class 335 subclass 88]

This subclass is indented under subclass 87. Subject matter wherein the structure includes a plurality of devices falling under the definition of subclass 87 but forming a single assembly or single entity under the class definition or a single device having a plurality of pairs of contacts whereby two or more separate and distinct electrical circuits may be completed through the device. This subclass does not include those devices which comprise a single movable contact which alternately contacts each of two fixed contacts thereby varying the direction of current in the two conductors of a single circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107+,

for plural contact alternating current operated type switches under the class definition for actuating a plurality of external circuits cyclically or successively.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 23+ for periodic switches in general and having plural contacts.

[List of Patents for class 335 subclass 89]

This subclass is indented under subclass 88. Subject matter wherein the structure includes means whereby the plurality of contacts are actuated in such a manner as to complete each one of a plurality of circuits selectively, alternately or consecutively.

SEE OR SEARCH CLASS:

315,	Electric Lamp and Discharge Devices: Systems, subclasses 209+ , especially subclass 217, for plural load device systems having a periodic switch in the supply circuit.

[List of Patents for class 335 subclass 90]

This subclass is indented under subclass 87. Subject matter wherein the structure includes means whereby the amplitude of the vibrator or periodic motion, the natural resonant frequency of the vibratory element, or equalization of the periods between the engagement of the movable contact and each one of fixed contacts is controlled or set.

SEE OR SEARCH THIS CLASS, SUBCLASS:

46,	for automatic circuit interrupters with contact rebound prevention means.
104,	for alternating current operated type switches with chatter, bounce or vibration prevention means.
193,	for contact vibration, bounce or chatter prevention means in general.
271,	for armature bounce or vibration preventing means in general.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 19.05 , 19.11, 19.19, and 19.21+ for other periodic switches with adjusting means.

[List of Patents for class 335 subclass 91]

This subclass is indented under subclass 87. Subject matter wherein the structure comprises significant magnetic structure or material peculiarly adapted for use in a periodic or cyclic switch.

SEE OR SEARCH THIS CLASS, SUBCLASS:

205+,	for switch structure, not restricted to a specialized subclass, utilizing a permanent magnet or magnets.
296,	significant magnet structure not specifically restricted to use in electromagnetic switches.

[List of Patents for class 335 subclass 92]

This subclass is indented under subclass 91. Subject matter wherein the magnetic structure includes at least two or more distinct magnetic means which may or may not be of diverse type and each of which performs its particular function independently of the other. For example, one magnetic means may consist of fluctuating magnetic field generating means for actuating an armature or reed while the other consists of a permanent magnet providing a biasing means for the armature or reed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

177+,	below, for other electromagnetic switches utilizing plural magnets.
266+,	for magnets or electromagnets and armatures with plural coils or magnets.
306,	for the structure of plural permanent magnets, per se.

[List of Patents for class 335 subclass 93]

This subclass is indented under subclass 87. Subject matter wherein the structure includes significant vibratory reed or other periodically actuated means whereby a movable contact or contacts is periodically caused to engage one or more fixed contacts. The vibratory reed or other actuating structure may be unitary with or comprise the armature of the magnet means and still be classified here as long as the motion of the movable contact is directly responsive to or proportional to the movement of the armature.

(1) Note. Armature structure peculiar to the subclass 87 special type switch and separate from the contact actuating reed, or other means, is classified in subclasses 95+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

154,	for reed switches with significant contact actuating structure where the reed may also act as an armature.
185+,	for other electromagnetic switches with significant contact actuating means.
235,	for polarized electromagnet with vibrating reed or spring bar armature.

SEE OR SEARCH CLASS:

84,	Music, subclass 409 for tuning forks, per se.
178,	Telegraphy, subclasses 47+ for telegraph transmitters or receivers utilizing vibrating reeds.
310,	Electrical Generator or Motor Structure, subclass 25 for reed type reciprocating motor structures and subclasses 32+ for self actuated interrupter devices utilizing flat spring armatures.
324,	Electricity: Measuring and Testing, subclass 76.49 for frequency meters utilizing tuned reeds.
331,	Oscillators, subclass 156 for oscillators with vibrating reed or string type electromechanical resonators.
333,	Wave Transmission Lines and Networks, subclasses 186+ for electromechanical transducer type (tuning fork) electric wave filters.

[List of Patents for class 335 subclass 94]

This subclass is indented under subclass 93. Subject matter wherein the vibratory reed or other contact actuating means is pretuned or inherently resonant at a particular predetermined frequency or band of frequencies.

(1) Note. Tuned mechanical resonators such as reed or piezo crystal devices when used as means for measuring the frequency of a cyclic current will be found in Class 324, especially subclass 76.49, and electrical wave filters of the electro mechanical transducer type will be found in Class 333, subclasses 186+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

101,	below, the alternating current responsive switches which are responsive to a predetermined or synchronous frequency.

[List of Patents for class 335 subclass 95]

This subclass is indented under subclass 87. Subject matter wherein the structure includes significant and specific details of the armature element or material of construction distinct from the vibratory reed or contact actuating means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

55+,	for conductive fluid type switches with particular armature structure.
80+,	for polarity responsive switches with particular armature structure.
93,	for significant vibratory reed structure.
124,	for multiple contact switches with particular armature structure.
154,	below, for armature structure for plural vacuum switches of the reed type.
203,	below, for armature details, per se.
249,	for alternating current electromagnet with special armature construction or mounting means.
261,	for electromagnet with plunger type armature of particular structure or material.
279,	for armature shape, structure or material in general.

[List of Patents for class 335 subclass 96]

This subclass is indented under subclass 95. Subject matter wherein the structure includes means whereby some operating characteristic, physical dimension or element of the armature is adjustably variable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

144,	for electromagnetic switch combined with an electrothermal actuator and having means to position or adjust the armature.
258,	for electromagnet and plunger armature with stroke adjustment for the armature.
273,	for electromagnet and armature with armature biasing means or bias adjustment means.

[List of Patents for class 335 subclass 97]

This subclass is indented under subclass 87. Subject matter wherein the structure includes significant and specific details of the contact structure or material of construction thereof. For purposes of classification in this subclass, contact supporting, holding and adjusting means are considered contact structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

57+,	for conductive liquid switches with particular contact or electrode structure.
83,	for polarity responsive switches with particular contact structure or composition.
133+,	for multiple contact switches with particular contact structure or arrangement.
154,	for reed switches with significant contact structure.
196+,	for contact structure applicable to electromagnetic switches in general.

[List of Patents for class 335 subclass 98]

This subclass is indented under subclass 97. Subject matter wherein the contact structure includes adjustment means whereby some operating characteristic, physical mounting or element may be adjustably varied.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194+,	for contact actuating means with contact pressure maintaining or adjusting means.
197,	below, for adjustable contact structure which is not peculiarly adapted for use with any particular type switch means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 166 for details of contact structure for nonmagnetically actuated switches.

[List of Patents for class 335 subclass 99]

This subclass is indented under subclass 2. Subject matter wherein the device is specifically adapted for operation by an alternating, pulsating or fluctuating current. The actuating current may be a periodic current, the average value of which over a given period is zero and which varies according to a sinusoidal function, a bi-directional current which has both positive and negative values, or a periodic current which is the sum of a direct current and an alternating current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

68+,	for switch actuating means comprising an induction motor whose armature comprises a vane making at least one complete revolution about its axis.
231,	for polarized electromagnet responsive to the varying amplitude of an alternating current.
243+,	for electromagnets and armature of the alternating current type.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclasses 1+ and appropriate subclasses, for safety and protective systems which may be AC responsive and subclasses 139+ for alternating current circuits for relays and electromagnets.

[List of Patents for class 335 subclass 100]

100

This subclass is indented under subclass 99. Subject matter wherein the contact actuating means comprises, or is responsive to, a device which derives its operative torque by magnetic induction from a winding or windings carrying alternating current, by the magnetic reaction between a current flowing in a rotor and an external flux path or by the magnetic repulsive force between magnetic flux sources.

SEE OR SEARCH THIS CLASS, SUBCLASS:

68+,	especially indented subclass 70, for induction or synchronous type switch contact operators of the continuously rotating motor type (e.g., induction or synchronous motor).
224+,	for magneto-mechanical motive device of dynamometer type utilizing an induced current movable conductor (e.g., eddy current number).

SEE OR SEARCH CLASS:

310,	Electrical Generator or Motor Structure, subclasses 105+ for torque transmitting clutches or brakes with induced or eddy current magnetic field and subclasses 166+ for the structure of induction type dynamo-electric machines in general.
318,	Electricity: Motive Power Systems, subclasses 727+ for induction motor control systems in general.
324,	Electricity: Measuring and Testing, subclasses 137+ for eddy current rotor meters (e.g., AC integrating watt hour meter type instruments).

[List of Patents for class 335 subclass 101]

101

This subclass is indented under subclass 99. Subject matter wherein the device is adapted to selectively operate at a predetermined frequency of the alternating operating current or wherein resonant vibration of a tuned reed armature will only occur when the cyclic period of the alternating current is the same as the resonant frequency of the tuned reed.

(1) Note. A large number of the patents found here are analogous to those to be found in subclass 94 above, the difference residing in the fact that in this subclass the vibrating member is comprised of the armature itself while in the vibrator group above the armature is generally separate from the vibratory contact actuating means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

70,	for frequency responsive or synchronous motor switch actuating means.
78,	for polarized relays which may utilize in alternating current source for the magnetic coil.
93+,	for switches of the vibratory type which may or may not be restricted to alternating current operation.
243+,	for alternating current responsive electromagnets with vibrating armature structure.

SEE OR SEARCH CLASS:

178,	Telegraphy, subclasses 47+ , for harmonic or vibrating reed type telegraph transmitter or receiver means.
307,	Electrical Transmission or Interconnection Systems, particularly subclass 87 for frequency responsive connecting and disconnecting plural supply systems and subclass 129 for frequency responsive switching systems in general.
310,	Electrical Generator or Motor Structure, subclass 25 , for tuned reed type motors or generators and subclasses 162+, for synchronous motor or generator structures.
318,	Electricity: Motive Power Systems, subclasses 700+ for synchronous motor control systems.
361,	Electricity: Electrical Systems and Devices, subclasses 160+ for frequency responsive relay systems, particularly subclasses 171+ for code responsive electric circuits for relays, and subclass 183 for plural relays that are frequency responsive.

[List of Patents for class 335 subclass 102]

102

This subclass is indented under subclass 99. Subject matter wherein the device is specifically adapted to operate in response to the currents in the respective phases of a multiphase or polyphase system, whereby one polyphase network is connected to another similar polyphase network through the device or wherein the device consists of a plurality of magnetic windings and having supplied to each winding an operating current at a phase angle different from that applied to each of the others.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+,	for polyphase automatic circuit interrupter devices.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, appropriate subclasses for nonmagnetically operated switches of the multiphase type.
307,	Electrical Transmission or Interconnection Systems, subclasses 13+ for polyphase systems in general that may include phase switches. An subclasses 112+ for plural phase switches especially indented subclass 127 for phase sequence responsive type.
361,	Electricity: Electrical Systems and Devices, subclasses 1+ for safety and protection systems which may utilize plural phase type devices.

[List of Patents for class 335 subclass 103]

103

This subclass is indented under subclass 99. Subject matter wherein the electromagnetic operating means includes a plurality of magnetic flux sources.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+,	for automatic circuit interrupters of the multipole or polyphase type.
92,	for vibratory type switches with plural magnets.
136,	for multiple contact type switches with plural magnet or coil means.
149,	for electrodynamic type switch operators utilizing plural relatively movable coils.
177+,	for electromagnetically operated switches generally employing plural magnets.
207,	for permanent magnet actuated switches utilizing plural permanent magnets.
222,	for relatively movable coil and permanent magnet.
223+,	for plural relatively movable coil devices (e.g., dynamometer type).
230+,	for permanent magnet polarized electromagnet and armature.
246,	for alternating current type electromagnetic motive devices with plural windings.

[List of Patents for class 335 subclass 104]

104

This subclass is indented under subclass 99. Subject matter wherein the structure includes means whereby the contacts of the device are prevented from chattering due to counter electromotive forces in the circuit or other causes, rebounding upon closing or whereby the armature is prevented from rocking or vibrating due to the pulsating force in the operating coil when energized by alternating current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

46,	for automatic circuit interrupting devices with rebound or chatter prevention means.
193,	for significant contact actuating structure including vibration, bounce or chatter prevention means.
247+,	for alternating current electromagnet and armature, per se, with chatter or noise preventing means.
271,	for electromagnet and armature mount in general with armature bounce or vibration preventing means.
277,	for magnetomechanical motive device in general with shock absorption, vibration or bounce preventing means.

[List of Patents for class 335 subclass 105]

105

This subclass is indented under subclass 99. Subject matter wherein the structure includes means whereby at least one element of the device, or some operating characteristic is adjustable either at will or permanently, the extent of movement of either the armature or the movable contact is adjusted or regulated, or whereby the speed of such movement is controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

67,	for retarded or delayed type switches with adjustable or regulatable features.
86,	for polarity responsive switches with regulating means.
90,	for periodic switch with adjustable vibrating element.
132,	for multiple contact type with adjustable or replaceable structure.
144,	for electromagnetically combined with electrothermal actuator and having means to position or adjust the armature.
197,	for adjustable or readily detachable contact structure.
212,	250, 273, 287, 295, and 298, for various electromechanical motive devices or holding magnets with adjustable features.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 170 for nonmagnetically actuated switches with contact pressure adjusting means.
361,	Electricity: Electrical Systems and Devices, subclass 206 for relay systems having relays with contact pressure increasing means.

[List of Patents for class 335 subclass 106]

106

This subclass is indented under subclass 2. Subject matter wherein the switch structure includes a plurality of fixed contacts each one of which, either singly or in a common group, is adapted to be connected to a separate independent external electrical circuit in such a manner that upon being contacted by a movable contact, or contacts, operated by the magnetic control means, a separate distinct electrical circuit is completed therethrough.

(1) Note. For purposes of classification in this or the indented subclasses auxiliary contacts, whose purpose is to control some function of the switch itself, in addition to main circuit controlling contacts, are not considered as comprising plural contacts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+,	for automatic circuit interrupters of the multiple or polyphase type.
11,	for plural switch structures of the automatic circuit interrupter type.
48,	for liquid contact switches with three or more contacts.
60,	for retarded switches with plural sets of contacts.
72,	for motor actuated switches of the plural contact type.
88,	for periodic switches with plural pairs of contacts.
102,	for alternating current switches of the polyphase type.
152,	for the combination of plural of vacuum or sealed type switches.
206,	for the combination of plural permanent magnet actuated switches.

SEE OR SEARCH CLASS:

178,	Telegraphy, particularly subclass 102 for multiple contact devices peculiarly adapted for telegraph keying.
200,	Electricity: Circuit Makers and Breakers, subclasses 1+ for multiple circuit control devices generally.
307,	Electrical Transmission or Interconnection Systems, appropriate subclasses for plural circuit switching systems in general, particularly subclasses 33+ for selectively connected load circuits, subclasses 85+ for selectively connected electric sources, and subclasses 112+ for miscellaneous switching systems, indented subclasses 113+ for providing for plural switches.
314,	Electric Lamp and Discharge Devices: Consumable Electrodes, subclass 2 for current shifting switches.
315,	Electric Lamp and Discharge Devices: Systems, subclasses 211+ for a periodic switch in the supply circuit of a plurality of load devices.
338,	Electrical Resistors, subclasses 92+ for a multipart resistor with switch means whereby portions of the resistive material may be short circuited.
361,	Electricity: Electrical Systems and Devices, subclasses 139+ for systems for selectively controlling a plurality of relays or electromagnets.
370,	Multiplex Communications, subclasses 304+ for multiplexing systems which include rotary distributor switches, and subclass 531 for multiplexing systems which include magnetic core switching.

[List of Patents for class 335 subclass 107]

107

This subclass is indented under subclass 106. Subject matter wherein the structure includes significant means whereby individual contacts connected to external circuits may be actuated in such a manner that a plurality of individually controlled circuits are completed through the device selectively, sequentially, or alternately.

SEE OR SEARCH THIS CLASS, SUBCLASS:

60,	for delayed operation switches with plural sets of contacts alternately or selectively opened or closed.
89,	for periodic switch devices with plural pairs of selectively or alternately actuatable.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 19.06+ for nonmagnetically actuated periodic switches with multiple contacts.
307,	Electrical Transmission or Interconnection Systems, especially subclass 29 for plural source systems with selectively connected loads of sources, subclass 37 for serially connected load circuits with selective series parallel connections, subclasses 38+ for selectively connected load circuits and indented subclass 41 for sequential or alternating connected load circuits, and subclasses 80+ for selectively connected sources.
315,	Electric Lamp and Discharge Devices: Systems, subclass 226 for a periodic multiple contact switch in the supply circuit of an electric lamp or other discharge device.
340,	Communications: Electrical, subclasses 806+ , for systems wherein a plurality of contacts are selectively actuated, to control energization of a display system.
341,	Coded Data Generation or Conversion, subclasses 22+ for a selective switch array controlling a pulse code transmitter.
361,	Electricity: Electrical Systems and Devices, subclasses 166+ for selectively or sequentially actuated relays.

[List of Patents for class 335 subclass 108]

108

This subclass is indented under subclass 107. Subject matter wherein the contact actuating structure comprises self-acting means, operating by its own self-contained mechanism when actuated by some impersonal influence, as for example, a change in current strength or a signalling current or voltage transmitted from a distance, which is not manual and requiring personal intervention, i.e., not requiring the presence of an operator. The art to be found in this and the indented subclasses is analogous to the automatic telephone type switching arrangements to be found in Class 379, subclasses 16+; but which is of general application and not restricted to any one art device specifically otherwise classifiable. The devices classified here may utilize mechanical structure for the actuation of the main contacts which are to be controlled, provided that the primary instigating means comprises electromagnetic or other magnetic means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 175+ for multiple contact switches analogous to those found here and in the indented subclasses but not claimed as electromagnetically actuated.

[List of Patents for class 335 subclass 109]

109

This subclass is indented under subclass 108. Subject matter wherein the contact actuating structure comprises a movable contact or wiper means movable in more than a single direction whereby the contacts are selectively chosen. The movement may comprise any combination of vertical, rotary, radial or other motions. The two or more directional movements are usually accomplished by means of separate magnet devices each operating separately in response to a given condition in the device.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 176+ for similar switching devices not specifically claimed as electromagnetically controlled.

[List of Patents for class 335 subclass 110]

110

This subclass is indented under subclass 109. Subject matter wherein the device includes means, in addition to the directional driving mechanism, whereby motion in a first direction is converted to a motion in a second direction.

SEE OR SEARCH CLASS:

74,	Machine Element or Mechanism, appropriate subclasses for mechanical motion conversion means, per se.

[List of Patents for class 335 subclass 111]

111

This subclass is indented under subclass 109. Subject matter wherein the structure includes details of at least one device which, in response to the appropriate control signals, connects one input path to one of a number of output paths, or alternatively, one of a number of input paths to one output path.

(1) Note. To complete the search for this subject matter consult the search notes for subclass 109, above.

[List of Patents for class 335 subclass 112]

112

This subclass is indented under subclass 111. Subject matter wherein the structure includes a device having a plurality of contacts arranged in a vertical path, a plurality of contacts arranged in a plurality of horizontal paths and an electromagnetically operated means for interconnecting any one or any group of the vertically arranged contacts with any one or any group of the horizontally arranged contacts.

SEE OR SEARCH CLASS:

340,	Communications: Electrical, subclasses 14.1 through 14.69for selective systems utilizing decoder matrix type (e.g., crossed gratings) switching devices.

[List of Patents for class 335 subclass 113]

113

This subclass is indented under subclass 108. Subject matter wherein the device includes holding, latching or locking means whereby a selected set of movable contacts or a brush is caused to lock onto a particular bank of contacts or a single contact in a given bank when moved to an operated condition and remain in the operated condition until released by some external actuating means or signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

21+,	for automatic circuit interrupters with latch or trip means.
77,	for motor actuated switches with locking latch or tripping structure.
164,	for switches having manually or force of gravity operated latch with electromagnetic trip.
166,	for switches with reset means for latch or trip.
167+,	for switches with latching means.
172+,	for switches with tripping means.
253+,	for electromagnet and armature with latch means.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 175+ for similar switching devices not peculiarly adapted for telephone systems and not claimed as being electromagnetically actuated.

[List of Patents for class 335 subclass 114]

114

This subclass is indented under subclass 108. Subject matter wherein the structure includes significant means whereby contact selection is accomplished by movement of a selector mechanism movable in a rotary manner in a single plane, as for example, circular movement in a horizontal plane.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72,	for motor driven switches of the plural contact type.
122,	for plural contact selective switches with contact actuator of the rotary type.
130,	for simultaneously actuated plural contact switches with movable contacts on a circular card or comb structure.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 1+ for similar switches not utilizing electromagnetic control means and periodic switches having plural contacts with rotary selector means.

[List of Patents for class 335 subclass 115]

115

This subclass is indented under subclass 108. Subject matter wherein the structure includes means whereby one or more carriers for the contact selecting means is caused to move or reciprocate in a single plane. The motion is usually in a vertical plane.

SEE OR SEARCH THIS CLASS, SUBCLASS:

126,	for multiple contact switches in general wherein the contact actuator reciprocates or slides.
129,	for switches comprising simultaneously actuated movable contacts on a slidable card or comb.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 16 for multiple circuit control switching, device with reciprocating contact means.

116
	This subclass is indented under subclass 108. Subject matter wherein the structure includes positive acting means whereby, after the completion of a contact selection operation, the selector is automatically returned to an initial position in readiness for a further selection operation.

117
	This subclass is indented under subclass 108. Subject matter wherein the structure comprises means whereby the wiper or contact selector is caused to be advanced in steps of different lengths or intervals covering variable numbers of terminals or contacts. The structure included here includes devices having a single operating mechanism for moving a brush set in one direction in steps of one length and in another direction in steps of another different length.

[List of Patents for class 335 subclass 118]

118

This subclass is indented under subclass 108. Subject matter wherein the structure includes significant electric motor means whereby the selector actuating means is driven in response to an input signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

68+,	for electric motor driven switches, especially subclass 72 for switches including plural contacts.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 17 for multiple control switches with significant operating means which may comprise an electric motor.

[List of Patents for class 335 subclass 119]

119

This subclass is indented under subclass 107. Subject matter wherein the contact control operation is accomplished through the actuation of a plurality of armatures either acting conjointly to operate a single contact actuating means or each individually operating a separate contact actuating means. The structure found in this subclass may include a plurality of magnetic coils each operating one of the plurality of armatures or a single coil driving two or more armatures.

SEE OR SEARCH THIS CLASS, SUBCLASS:

177+,	for switches utilizing plural coils or flux sources or armatures.
232+,	for polarized electromagnet with plural armatures.
242,	for electromagnet having plural armatures with means to selectively retard them.
259,	for electromagnet with plural plunger armatures.
265,	for electromagnets having plural armatures actuated by a single coil.
267,	for electromagnets having plural coils driving plural armatures.

[List of Patents for class 335 subclass 120]

120

This subclass is indented under subclass 119. Subject matter wherein the structure includes interlocking or mechanical means whereby the armatures are caused to be operated in unison or whereby one or both are adapted to exercise control over the other thereby causing the completion of selected electrical circuits through the device in the proper sequence.

SEE OR SEARCH THIS CLASS, SUBCLASS:

160+,	for plural independently operative switches with interlocking means.
233,	for polarized electromagnet with plural armatures having armature locking means.

SEE OR SEARCH CLASS:

361,	Electricity: Electrical Systems and Devices, subclasses 160+ for relays or electromagnets with plural armatures having interlocking means, particularly subclasses 191+.

[List of Patents for class 335 subclass 121]

121

This subclass is indented under subclass 107. Subject matter wherein the structure includes significant means, operatively connected to or combined with an armature, whereby the plurality of contacts are actuated from a first to a second or subsequent condition thereby completing selected circuits through the device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

71+,	for motor operated switches with significant contact actuating means.
138+,	for step-by-step switches with significant contact actuating means.
185+,	for significant contact actuating means not specifically adapted for use in any particular type switch.

[List of Patents for class 335 subclass 122]

122

This subclass is indented under subclass 121. Subject matter wherein the significant contact actuating means comprises at least one member which is moved in a circular arc by a rotating member or a plurality of members which collectively transpose a motion of a first type to a second motion of another type; as for example, a reciprocating motion is converted to a rotary motion, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

114,	for automatic telephone type switches with rotary selector motion.
130,	for plural contact switches with movable contacts on a circular card or comb structure.

SEE OR SEARCH CLASS:

74,	Machine Element or Mechanism, appropriate subclasses for various compound mechanical movements.
200,	Electricity: Circuit Makers and Breakers, subclass 4 for multiple circuit control switches utilizing combined pivoted and reciprocating contacts and subclasses 175+ for automatic multiple contact selective switches utilizing combined or compound motions.

[List of Patents for class 335 subclass 123]

123

This subclass is indented under subclass 122. Subject matter wherein the contact actuating means comprises significant structural details of a pawl and ratchet device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

140,	for switches of the step-by-step type utilizing pawl and ratchet mechanism.

SEE OR SEARCH CLASS:

74,	Machine Element or Mechanism, subclass 575 for pawl and ratchet devices of general utility.

[List of Patents for class 335 subclass 124]

124

This subclass is indented under subclass 121. Subject matter wherein the contact actuating structure is combined with armature structure which within itself comprises significant means whereby the actuating means is controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

187,	below for significant contact actuating means not specifically utilized in any special type switch and combined with an armature.

[List of Patents for class 335 subclass 125]

125

This subclass is indented under subclass 124. Subject matter wherein the armature structure comprises an armature pivoted or otherwise supported at a point in such a manner as to be alternately attracted by different poles of a magnet structure for producing motion in a rotary or oscillatory manner whereby the contacts are caused to be selectively opened or closed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72,	for plural contacts actuated by rotary electric motor.
181,	for plural magnets actuating a single pivoted armature.
272,	for rotary disc or cylinder armatures. 276, for pivoted armature structure for electromagnets.

[List of Patents for class 335 subclass 126]

126

This subclass is indented under subclass 121. Subject matter wherein the contact actuating means consists of a device which is linearly slidable or reciprocable in alternate reverse directions along a single fixed axis or in a single plane, e.g., sliding bar or comb.

SEE OR SEARCH THIS CLASS, SUBCLASS:

112,	for automatic telephone type switches of the cross bar type.
115,	for automatic telephone type switches with reciprocating sliding motion.
129,	for multiple contact switches with movable contacts on slidable card, bar or comb.

SEE OR SEARCH CLASS:

178,	Telegraphy, subclass 86 for telegraph code transmitter with reciprocating contacts.
200,	Electricity: Circuit Makers and Breakers, subclass 4 for combined pivoting and reciprocating contact switches and subclass 16 for multiple circuit switch structures with reciprocating contact.

[List of Patents for class 335 subclass 127]

127

This subclass is indented under subclass 106. Subject matter wherein the structure includes at least one group of contacts adapted to operate as a unit, and means whereby all of the contacts of at least one group are actuated in a manner such that all of the plurality of external circuits connected to the contacts of the group are completed or opened simultaneously.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+,	for automatic circuit interrupting multipole or polyphase switches.
88,	above, for cyclic or periodical switches with plural contacts which may or may not be operated simultaneously.

128
	This subclass is indented under subclass 127. Subject matter wherein the structure includes at least one armature; rockable about an axis coinciding with the coil axis or otherwise pivoted for rotation about a fixed axis and combined with means, depending upon the attraction or nonattraction of the armature, whereby at least a group of the plurality of contacts are actuated as a group.

[List of Patents for class 335 subclass 129]

129

This subclass is indented under subclass 128. Subject matter wherein the structure includes at least one slidable card, bar or comb means actuatable by the armature and adapted to embrace a plurality of movable contacts simultaneously.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115,	for automatic telephone type multiple contact switches with sliding selector motion.
126,	for selective multiple contact switches with linear sliding contact actuation means.

[List of Patents for class 335 subclass 130]

130

This subclass is indented under subclass 128. Subject matter wherein the structure includes at least one circular plate, comb or other means whereby either first plurality of contacts, a second such plurality, or both are caused to be moved in a circular path having a common axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

114,	for automatic telephone switches with rotary selector motion.
122,	for selective multiple contact switches with rotary motion contact actuator.

[List of Patents for class 335 subclass 131]

131

This subclass is indented under subclass 127. Subject matter wherein the structure includes a sliding core armature reciprocal in a linear manner, along the axis of, or in a plane parallel with the axis of the controlling magnet coil. The contact actuating means may be directly attached to the core armature or may be otherwise attached by mechanical structure which is actuatable by the motion of the armature.

SEE OR SEARCH THIS CLASS, SUBCLASS:

14,	for automatic circuit interrupting devices which have a movable contact, or contacts, directly operable by a sliding core armature.
251,	for alternating current magnets or electromagnets with plunger type armature.
255+,	for magnets or electromagnets with plunger type armatures.

[List of Patents for class 335 subclass 132]

132

This subclass is indented under subclass 106. Subject matter wherein the structure includes at least one structural unit which is specifically described as adapted to be adjusted, interchangeable, removable or replaceable without effecting the operativeness of the device as a whole or whereby some operative characteristic of the device may be varied.

SEE OR SEARCH THIS CLASS, SUBCLASS:

42,	and 45, for automatic circuit interrupting devices with adjustable trip structure.
67,	for retarded or delayed action type switches with adjustable delay means.
86,	for adjustable polarized switches.
96,	and 98, respectively, for armature or contact adjusting means in vibrator type switches.
176,	for magnetically actuated tripping means not specifically claimed in an automatic circuit interrupter.
197+,	for adjustable contact structure.
212,	237, 258, 287, 295, and 298, respectively for magnets or electromagnets with various adjustable features.

[List of Patents for class 335 subclass 133]

133

This subclass is indented under subclass 106. Subject matter wherein the structure includes significant details of the contact arrangement or structure; for example, a matrix or cross bar arrangement, which particularly adapts the contact assembly to operate in a predetermined manner or sequence.

SEE OR SEARCH THIS CLASS, SUBCLASS:

15+,	for automatic circuit interrupters with contact biasing, holding or pressure control means.
57+,	for contact or electrode structure for conductive liquid type switches.
83,	for polarity responsive switch contact structure or composition.
97+,	for periodic switch contact arrangement or composition.
196+,	for significant contact composition or structure not specifically adapted for use in any particular special type switch.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 166+ for significant contact details.
340,	Communications: Electrical, subclasses 14.1 through 14.69for decoder matrix-type crossed gratings with selectively energized conductors.
361,	Electricity: Electrical Systems and Devices, subclass 822 for wire bank assemblies.

[List of Patents for class 335 subclass 134]

134

This subclass is indented under subclass 133. Subject matter wherein the contacts are arranged in coordinate rows in planes which are at an angle to each other (usually a right angle) or in a grid arrangement, whereby contact is made by displacing one contact perpendicularly to another. The switches found here are for the most part those known as crossbar or coordinate types, similar to those found in Class 379, subclass 25, but not limited by the claim language to use in a telephone system.

SEE OR SEARCH CLASS:

340,	Communications: Electrical, subclasses 2.2 through 2.31for a channel selecting matrix and subclasses 14.1-14.69 for decoder matrix-type contact arrangements in selective signalling systems.

[List of Patents for class 335 subclass 135]

135

This subclass is indented under subclass 133. Subject matter wherein the contacts are specifically arranged in a pile or stack.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 166+ for miscellaneous contact structure.

[List of Patents for class 335 subclass 136]

136

This subclass is indented under subclass 106. Subject matter wherein the structure includes a plurality of magnet or coil means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+,	for automatic circuit interrupters for the polyphase or multipole type having plural electromagnets.
92,	for periodic switches with plural magnets.
102,	for alternating current switches of the polyphase type.
103,	for alternating current switches with plural magnetic actuators.
149,	for electrodynamically operated switches of the moving coil type with plural coils.
177+,	for electromagnetically controlled switches in general utilizing plural magnets or other flux sources.
207,	for permanent magnet actuated switches with plural magnets.
223+,	for magnetomechanical motive devices of the relatively moving conductor type.
246,	for alternating current magnetomotive device with plural windings.
266+,	for electromagnet structure comprising plural coils or magnets.

[List of Patents for class 335 subclass 137]

137

This subclass is indented under subclass 136. Subject matter wherein the plural magnets are of diverse magnetic characteristics, as for example, electromagnet and permanent magnet or comprise diverse type windings.

SEE OR SEARCH THIS CLASS, SUBCLASS:

159+,	for plural independent switches each of which may utilize one or more windings.
179,	for magnetic switches in general utilizing plural diverse type magnets.
229+,	for magnetomotive devices having permanent magnet and electromagnet structure.

[List of Patents for class 335 subclass 138]

138

This subclass is indented under subclass 2. Subject matter wherein the device comprises means whereby plural successive energizations of a control magnet by pulses of control signal current produce a sequential or step-by-step operation of a contact actuation means whereby a single set of main contacts are opened or closed at the end of the sequence of pulsations sequence of actuating pulses may comprise any number of pulses from two or more.

(1) Note. The subject matter to be found in this and the indented subclasses should be distinguished from that classified in subclasses 107+, above, wherein a plurality of contacts are actuated in sequence in such a manner as to complete a plurality of circuits sequentially through the devices. While the contact actuating means in the above group may be similar to those found here the fundamental distinction between the two groups is that in the subclasses 107+ group there are a plurality of circuits controlled while in this group only a single set of main contacts is utilized.

[List of Patents for class 335 subclass 139]

139

This subclass is indented under subclass 138. Subject matter wherein the structure includes means whereby the successive steps take place at definite intervals, after a predetermined time or in a given order or whereby it is possible to determine the interval during which the contacts are held in the make or break condition after arrival in that condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30,	for automatic circuit interrupters with mechanical motor controlled (e.g., clock movement) latch or trip setting delay means.
64+,	for retarded or delayed type switches wherein the contact actuation takes place after a predetermined interval governed by a motor of clock work mechanism.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 410 for rotating contact type snap switches operating in a step-by-step manner whereby the movable contact member is rotated by a series of pulses.
236,	Automatic Temperature and Humidity Regulation, subclass 76 for control and regulating systems utilizing step-by-step actuation of an electric motor.
307,	Electrical Transmission or Interconnection Systems, subclass 141 for switch actuation means with time delay which may employ step-by-step switch actuation means.

[List of Patents for class 335 subclass 140]

140

This subclass is indented under subclass 138. Subject matter wherein the structure includes ratchet and pawl type mechanical operating means under the control of an armature or armatures whereby the contacts are actuated to and from a closed condition in a step-by-step manner.

SEE OR SEARCH THIS CLASS, SUBCLASS:

123,	for devices in which a plurality of sets of contacts are actuated selectively or sequentially operated by ratchet and pawl means.

SEE OR SEARCH CLASS:

74,	Machine Element or Mechanism, appropriate subclasses, particularly subclasses 575+ , for specific machine elements and mechanisms of the pawl and ratchet type.
200,	Electricity: Circuit Makers and Breakers, subclass 61.69 for a circuit maker or breaker whose cycle of operation corresponds to more than one opening and closing of a closure means.
340,	Communications: Electrical, subclasses 825.65+ for remote controlled signalling devices with pulse counting means, subclasses 309.1+ for systems which are timer controlled.
361,	Electricity: Electrical Systems and Devices, subclasses 160+ for electric circuits for relays or electromagnets utilizing a time delayed operating switch.

[List of Patents for class 335 subclass 141]

141

This subclass is indented under subclass 2. Subject matter wherein the subject matter includes the combination of magnetic responsive control means combined with terminal-current responsive means, such as fuses, cut-outs, latching or other means effecting the operation of the device as a result of heating by current flow. Usually, both diversely responsive devices operate upon the same contact actuation or control means. The heating current may comprise the entire current flowing in the controlled circuit or a proportionate part thereof flowing in a shunt circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

31,	for thermal controlled latch or trip delay means in automatic circuit interrupters.
35+,	for automatic circuit interrupting devices with combined magnetic and thermal current trip means.
39+,	for automatic circuit interrupter with magnetic latch or trip including thermal delay means.
43+,	for automatic circuit interrupters with thermally actuated latch or trip means.
66,	for retarded or delayed type switches with thermal delay means.
156,	for switches with protective means responsive to heat.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 3 for multiple circuit control devices with thermal current control means.
219,	Electric Heating, subclass 110 for resistance heating systems with current supply responsive to current voltage or temperature and subclasses 510+ for heating systems including automatically controlled switches with thermally responsive means.
236,	Automatic Temperature and Humidity Regulation, subclass 68 for systems with relay structure combined with auxiliary heater means.
307,	Electrical Transmission or Interconnection Systems, subclass 117 for switching systems responsive to heat.
318,	Electricity: Motive Power Systems, subclasses 471+ for electric motor systems including automatic control switches with thermal control means for the switch.
337,	Electricity: Electrothermally or Thermally Actuated Switches, subclass 14 for nonmagnetically actuated switches which are responsive to heat generated by the current in a protected circuit and subclass 298 for switches which are responsive to heat from an external source.
361,	Electricity: Electrical Systems and Devices, subclass 99 for safety and protective systems including combined thermal-electromagnetic relays in a time delay means, and subclasses 160+ for electric circuits for relays and electromagnets with thermal control means.