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 [Search a list of Patent Appplications for class 337]   CLASS 337,ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATEDSWITCHES
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SECTION I - CLASS DEFINITION

This class is restricted to the structure of electric current switching devices of general application for closing or opening electrical circuits which devices depend upon the heating effect of a current or of the ambient temperature of the surrounding medium for their operation.

This class also includes miscellaneous elements, or subcombinations of elements, restricted for use in and with the class type switches and which have not reached the status of separate classification elsewhere.

This class also includes implements or handling devices specifically adapted for use with the class type switches and not provided for elsewhere in a separate class.

Electrical systems or circuits which include electrothermally or thermally operated switches, 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 system or apparatus controlled.

SECTION II - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

52, Static Structures (e.g., Buildings),   subclass 232 for combined building and fuse.
60, Power Plants,   subclasses 513 , 523 and 528 for expansion and contraction type thermoelectric motors.
62, Refrigeration,   subclasses 132+ for automatic controls utilizing thermostatic devices.
74, Machine Element or Mechanism,   appropriate subclasses for mechanical operators of general application particularly subclasses 519+ for toggle arrangements and 527+ for detents and related mechanism.
81, Tools,   subclass 3.8 for special tools adapted as fuse pullers.
99, Foods and Beverages: Apparatus,   subclasses 324+ for cooking apparatus with thermostatic control.
102, Ammunition and Explosives,   appropriate subclasses for detonators in general.
116, Signals and Indicators,   subclasses 101+ for thermal alarms and subclasses 216+ for thermal indicators, such as fuses.
122, Liquid Heaters and Vaporizers,   subclasses 451.1+ for thermally controlled automatic feeders and subclass 504.1 for fused safety devices for liquid heaters and vaporizers.
137, Fluid Handling,   subclass 457 for valves with thermostatic cut off.
140, Wireworking,   subclass 71.5 for wireworking apparatus for manufacturing space discharge device electrodes.
149, Explosive and Thermic Compositions or Charges,   appropriate subclasses for explosive fusible material compositions.
165, Heat Exchange,   subclasses 200+ for temperature or pressure actuated automatic control devices for heating and cooling.
169, Fire Extinguishers,   subclass 23 for alarm or signal devices combined with extinguishing systems and subclass 42 for fusible elements, per se, and subclass 61 for systems having condition responsive electrical controls.
174, Electricity: Conductors and Insulators,   subclasses 50 through 64for boxes and housings with electric device or mounting means for housings or casings with fuse receptacles.
200, Electricity: Circuit Makers and Breakers,   subclasses 81+ for fluid pressure responsive mechanical switches where the operating means is responsive to the flow of a fluid as distinguished from those which are responsive to the static pressure of the fluid and those in which the pressure is generated by expansion of the fluid by heat.
219, Electric Heating,   subclasses 509+ for electric heating devices automatically controlled by thermally responsive switching means.
236, Automatic Temperature and Humidity Regulation,   subclasses 79 through 87,especially 86 and 87 for thermostatic fluid operating motors utilizing expanding fluid and expanding solids and subclasses 91-104 for thermostatic controls generally.
252, Compositions,   subclass 70 for thermostatic compositions.
307, Electrical Transmission or Interconnection Systems,   subclasses 117+ for heat responsive switching systems.
313, Electric Lamp and Discharge Devices,   appropriate subclasses, and 314, Electric Lamp and Discharge Devices: Consumable Electrodes, appropriate subclasses for electric space discharge devices designed to pass an electric current (e.g., spark, arc, etc.,) between two electrodes spaced apart in a vacuum or a gas or vapor atmosphere (including in atmospheric air). See Class 314 where the discharge device is provided with an electrode which is consumed during the operation and has means to feed the electrodes together to compensate for the consumption of the electrode. Class 313 is the generic class for space discharge devices. See Class 313, subclasses 146+ 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 section the class definition of Class 313 for the distinction between a space discharge device and circuit maker and breaker.
314, Electric Lamp and Discharge Devices: Consumable Electrodes,   see the reference to Class 313, above.
315, Electric Lamp and Discharge Devices: Systems,   subclasses 56+ and the subclasses specified in the notes to the definitions of those subclasses, for other electric space discharge devices which have structurally combined therewith a circuit maker and breaker. See the reference to Class 200, Electricity: Circuit Makers and Breakers, in the class definition of Class 315, particularly the reference to subclass 113.5 for the line between Class 315 and Class 337.
318, Electricity: Motive Power Systems,   subclass 117 for thermo-electric motors comprising a member which undergoes substantial changes in shape, position and/or dimensions when heated, and means for electrically heating the member, subclasses 471+ for thermally controlled automatic starting or stopping of a motor.
320, Electricity: Battery or Capacitor Charging or Discharging,   subclasses 166+ for charging or discharging a capacitor, per se.
322, Electricity: Single Generator Systems,   subclasses 33+ for thermally responsive systems for automatic control of the generator or driving means.
324, Electricity: Measuring and Testing,   subclass 106 for testing devices (meters) having means whose temperature is varied in accordance with the electricity being measured.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 1 for combined diverse switches where the diverse switch may be of the thermal or thermal current type, subclass 23 for automatic circuit breakers with combined magnetic and thermally actuated latch or trip means, subclass 31 for latching means with thermally actuated resetting or reclosing means, subclass 39 for magnetic tripping means with thermally actuated time delay, subclasses 43+ for thermally actuated tripping or latching means, subclass 66 for electromagnetically controlled switches, with electrothermal delay means and subclasses 141+ for combined electromagnetic and electrothermal actuating means.
338, Electrical Resistors,   appropriate subclasses for electrical resistors, particularly subclasses 7+ for resistors whose resistance value is temperature compensated and 25+ for resistors whose resistance value is ambient temperature responsive.
340, Communications: Electrical,   subclasses 593+ for a thermal alarm circuit having a switch-type sensor.
361, Electricity: Electrical Systems and Devices,   subclasses 161+ for electric circuits for relays with thermal control.
373, Industrial Electric Heating Furnaces,   subclasses 102+ and 136 for electric furnaces with thermal control means.
374, Thermal Measuring and Testing,   subclasses 187+ and 201+ for temperature measuring devices utilizing expanding solid or expanding fluid elements respectively.
428, Stock Material or Miscellaneous Articles,   subclasses 375+ for coated electrical conductors which may include contacts and switches, but which are recited solely as a base with a particular coating thereon, and subclasses 616+ for composite metallic thermostat material having heat-deflectable characteristics.
439, Electrical Connectors,   appropriate subclasses for an electrical connector, generally; including a connector for use with an electrothermally or thermally actuated switch. A switch of this class (Class 337) is distinguished from a connector of Class 439 in that, a switch is a "permanent" assembly of component parts fixed together so that each time a contact is brought into mating engagement with a cooperating contact, it moves along the same predetermined path; whereas, an electrical connector is a member that mates with a distinct mating part from which it is physically removed each time the connection is broken.

SUBCLASSES

[List of Patents for class 337 subclass 1]    1WITH DIVERSE ART‐TYPE DEVICE:
 This subclass is indented under the class definition.  Subject matter wherein an electrothermal or thermally actuated switch is combined with another device having an added purpose or utility independent of the switch and in which the utility of the other art device is not destroyed by the removal of or deactivation of the switching device and which claimed combination does not include sufficient specific structure of the other art device as to be classified either with the other art device, per se, or elsewhere.
(1) Note. See the appropriate other art class in the Manual of Classification for specific other art devices which may be combined with switching means.
  
[List of Patents for class 337 subclass 2]    2WITH SEPARATE DISTINCT DIVERSE ART‐TYPE SWITCHING DEVICE (E.G., FLUID‐ OR MECHANICAL‐ACTUATED):
 This subclass is indented under the class definition.  Subject matter wherein the structure includes at least two independent separate and distinct switches, one or more of which is of the type classifiable in this class combined with at least one diverse art type switch classifiable in another art class.
(1) Note. Example (1) Fuses connected or associated with automatic circuit breakers of the mechanical type. The fused means being adapted to open an electric circuit breaker means opens or closes the same circuit independently of the fuses under certain other conditions.

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1,for specific art type electrothermal device combined with other art type.

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62, Refrigeration,   subclass 4 , for refrigerator devices utilizing combined expansible fluid actuated switches with other art types.
74, Machine Element or Mechanism,   subclasses 471+ for control lever and linkage systems controlling multiple elements and utilizing multiple switches.
123, Internal‐Combustion Engines,   subclass 198 for control devices utilizing combined electrothermal and magnetic switches.
200, Electricity: Circuit Makers and Breakers,   subclass 3 for mechanical multiple circuit control devices with thermal current means.
219, Electric Heating,   subclasses 482+ for power supply and voltage or current regulatory systems for electric heaters which may utilize plural diverse switches.
236, Automatic Temperature and Humidity Regulation,   appropriate subclasses particularly subclasses 2+ for electric heaters of different art types combined with an operative in an incubator and subclasses 91+ for various thermostatic controls which may combine two or more types.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 1 for magnetically actuated switches combined with electrothermal or thermally actuated switch, subclasses 141+ for magnetically actuated switches with additional electrothermal means.
  
[List of Patents for class 337 subclass 3]    3Bimetallic device with other:
 This subclass is indented under subclass 2.  Subject matter wherein the art type switch comprises or utilizes at least one thermally responsive element consisting of a composite of two dissimilar metals which expand different amounts under the influence of heat and whereby associated circuit contacts are opened or closed as a result of the bending of the element.

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13,for thermally actuated switches utilizing a bimetallic element combined with other diverse actuating means such as a magnet.
16,for shunt circuit completion devices with bimetallic elements.
35,for plural bimetallic actuating means in a single switch.
36,for electrothermal switches in general using bimetallic elements.
  
[List of Patents for class 337 subclass 4]    4Fusible element device with other:
 This subclass is indented under subclass 2.  Subject matter wherein the art type switch comprises or utilizes a device capable of melting and thereby causing the interruption of an electric circuit when abnormally heated by the current in the electrical circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

142+,for electrothermal switches of the fusible type.
299,for thermally actuated fuses combined with diverse similar art type devices.
401+,for thermal switches utilizing fuses for the principal operating means.

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218, High‐Voltage Switches With Arc Preventing or Extinguishing Devices,   subclasses 22+ for mechanical magnetic blowout switches which may employ fusible elements.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 142 for magnetically operated switches with fuses.
361, Electricity: Electrical Systems and Devices,   appropriate subclasses for safety and protection devices which may utilize fuses combined with mechanical means.
  
[List of Patents for class 337 subclass 5]    5Diverse art‐type switching device responsive to the condition of fusible element:
 This subclass is indented under subclass 4.  Subject matter including structure whereby the operative condition of the other art switching device is directly controlled by the condition of the fusible element.
(1) Note. Example: A spring controlled mechanical circuit closing device the operation of which takes place upon the rupture of a fusible device which normally completes the circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

143,for electrothermal switches having a fuse controlling mechanical contact control means.
402,for thermally actuated fuses controlling mechanical contact control means.
  
[List of Patents for class 337 subclass 6]    6With automatic circuit‐interrupting device:
 This subclass is indented under subclass 4.  Subject matter wherein the other art switching device comprises means whereby normally closed contacts are automatically opened upon the occurrence of an abnormal circuit condition.
(1) Note. This subclass also includes patents where the fusible element device is claimed in detail and the other art type switch is specifically described as a circuit breaker, providing plural distinctive switches are in fact claimed and the combination is not classifiable in another art.

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361, Electricity: Electrical Systems and Devices,   subclasses 103+ for automatic circuit breakers, and subclasses 161+ for thermal controls for relays.
  
[List of Patents for class 337 subclass 7]    7Multiphase of multipole:
 This subclass is indented under subclass 6.  Subject matter wherein the other art switching device is further described as comprising a plurality of individual conductors which comprise the conductors of a polyphase or plural conductor transmission line.
(1) Note. See the note to the definition of subclass 6 above.

SEE OR SEARCH THIS CLASS, SUBCLASS:

45+,for bimetallic element operated electrothermal switches of the multipole or polyphase type with manual control.
146,for fusible element actuated electrothermal switches of the multipole or polyphase type.
  
[List of Patents for class 337 subclass 8]    8Manually operable mechanical device:
 This subclass is indented under subclass 4.  Subject matter wherein the other art switch device is recited as comprising a manually operated circuit controller.

SEE OR SEARCH THIS CLASS, SUBCLASS:

143+,for electrothermally actuated fuses combined with and controlling manual or other mechanical contact operating means.
402+,for thermally actuated fuses controlling manually operated contact control means.
  
[List of Patents for class 337 subclass 9]    9Knife or blade switch:
 This subclass is indented under subclass 8.  Subject matter wherein the manually operable other art device is specifically recited as a knife or blade switch wherein the movable element, a hinged blade, enters or embraces the contact clips.

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200, Electricity: Circuit Makers and Breakers,   subclasses 554+ for mechanical knife switches which may be protected by fuses.
  
[List of Patents for class 337 subclass 10]    10Rotary or reciprocating mechanism:
 This subclass is indented under subclass 8.  Subject matter wherein the manually operated other art device is specifically recited as comprising rotary or reciprocating mechanical contact actuating structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

64,for bimetallic element electrothermal switch with reciprocating spring actuated actuating device.
111,and 149, respectively, for reciprocating or rotary mechanical actuators for fusible element type electrothermal switches.
200+,and 410, respectively, for reciprocating or rotary mechanical actuators of thermal switches of the fusible, combustible or explosive material type.
238,for bimetallic element electrothermal switch with rotary or oscillatory motion spring actuated operator.
347+,and 348, respectively, for rotary or reciprocating mechanical actuators for bimetallic element thermally operated switches.
398+,and 401, respectively, for reciprocating or rotary mechanical actuators for expansible or vaporizable fluid actuated thermal switches.

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200, Electricity: Circuit Makers and Breakers,   subclasses 465+ for mechanical switches with rotating contact control means which may be protected by fuses.
  
[List of Patents for class 337 subclass 11]    11With multiple circuit connector device (e.g., multiple mechanical):
 This subclass is indented under subclass 4.  Subject matter wherein the other art device is specifically described as a device in which a plurality of contacts are arranged to control two or more independent electrical circuits.
(1) Note. The subject matter in this subclass should not be confused with the other art type devices in subclass 7 above in which a plurality of conductors comprise a single circuit.

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59+,for electrothermal bimetallic element switch with multiple contacts and mechanical actuator.
145,for electrothermal fuse means controlling multiple contact or plural circuit control means.
337+,for thermal bimetallic element switches of the multiple contact type and with mechanical actuator.
406,for thermally actuated fuses controlling multiple contacts or plural circuit control means.

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200, Electricity: Circuit Makers and Breakers,   subclasses 1+ for mechanical multiple circuit control devices which may be protected by fuses.
361, Electricity: Electrical Systems and Devices,   subclasses 1+ and 114+ for mechanical safety and protective devices which may control a multiplicity of circuits.
  
[List of Patents for class 337 subclass 12]    12WITH DIVERSE ART‐TYPE ACTUATOR FOR SINGLE SWITCH:
 This subclass is indented under the class definition.  Subject matter including at least one contact actuating means of the type classifiable in this class in combination with a diverse type actuating means of a type classifiable elsewhere in another art class and each one acting singly or conjointly to control the same single set of switch contacts. The two or more actuating means may be physically located in the same housing or casing and may have cooperative features as long as each one is operative independent of the other. Some examples of diverse type switch actuating means are the mechanical special application switches in Class 200.
(1) Note. For similar subject matter including the combination of electromagnetic or magnetic control means combined with thermal‐current responsive means, search will be in Class 335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, subclasses 141+ and in the classes and subclasses referred to in the search notes under the subclass definition.

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54,and 90, for electrothermally actuated bimetallic switches which operate with a snap action and have additional magnetic flux sources to act as holding or biasing means.
134,for longitudinally expansible element devices with magnetic biasing or holding means.
344,and 366, for thermally actuated bimetallic switch devices with magnetic holding or biasing means.

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200, Electricity: Circuit Makers and Breakers,   appropriate subclass for special application switches which may also include electrothermal or thermal actuating means.
219, Electric Heating,   subclass 491 for heating devices with combined regulating or control means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 141+ for electromagnetically actuated switches which include additional electrothermal or thermal actuating means.
  
[List of Patents for class 337 subclass 13]    13Bimetallic with other:
 This subclass is indented under subclass 12.  Subject matter wherein one of the claimed thermally responsive elements is specifically recited as being a bimetallic element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3,above for a bimetallic element actuated switch combined with a diverse art type switch (e.g., fluid actuated).
  
[List of Patents for class 337 subclass 14]    14ELECTROTHERMALLY ACTUATED SWITCHES:
 This subclass is indented under the class definition.  Devices relating to structure operative to open or close an electric circuit or circuits and the combination of those devices; the operating means whereby the opening or closing function is accomplished by a thermal device directly inserted in the circuit and traversed by the controlling current. The circuit generally is the circuit which is to be controlled.
(1) Note. The electrothermal actuated switches of subclasses 14+ are distinguished from the thermally actuated switches in subclasses 298+ in that in the latter group the devices are principally responsive to heat from an external source, for instance the heat in a surrounding medium.

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2+,for electrothermal switches combined with diverse art type switches.

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99, Foods and Beverages: Apparatus,   subclasses 324+ for cooking apparatus with electrothermal control.
219, Electric Heating,   subclasses 482+ for electrothermally controlled heating devices and subclasses 507+ for heating devices.
313, Electric Lamp and Discharge Devices,   appropriate subclasses, especially subclasses 11+ for discharge devices with temperature modifying means.
314, Electric Lamp and Discharge Devices: Consumable Electrodes,   subclasses 89+ for glow discharge devices with thermostatic operator means.
315, Electric Lamp and Discharge Devices: Systems,   appropriate subclasses for discharge device systems with electrothermal control means combined with a discharge device load.
318, Electricity: Motive Power Systems,   and subclasses 471+ for thermally controlled automatic starting and/or stopping systems.
320, Electricity: Battery or Capacitor Charging or Discharging,   subclasses 166+ for charging or discharging a capacitor, per se.
322, Electricity: Single Generator Systems,   subclasses 33+ for thermally responsive automatic control means for a single generator.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 23 for circuit breakers with combined magnets and thermal latch or trip means and subclasses 141+ for electromagnetically actuated switches combined with electrothermal actuating means.
340, Communications: Electrical,   subclasses 584+ for alarms and signal systems which are temperature controlled.
361, Electricity: Electrical Systems and Devices,   subclasses 161+ for thermal controls for relays, subclasses 247+ for ignition systems with a spark gap igniter, and subclasses 627+ for distribution boards with fuse means.
388, Electricity: Motor Control Systems,   art collections 934 for motor control systems responsive to a thermal condition.
  
[List of Patents for class 337 subclass 15]    15Shunt or short circuit completion devices:
 This subclass is indented under subclass 14.  Subject matter including means whereby upon the failure of any selected portion of an electrical circuit or a device within the selected portion, an electrical conducting shunt circuit is automatically established around the device or the selected portion of the circuit.
(1) Note. The devices found here are especially adapted for use in closing a shunt circuit around a translating device or a loop circuit when such translating device becomes inoperative or the loop circuit is broken. These devices are generally used in series lighting circuits so that in case a lamp breaks or burns out a shunt circuit is completed around the lamp in order to keep the main circuit closed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

125,for electrothermal switch with longitudinally expansible element type with electrical shunting means.
221,for electrothermal switch of the fusible element type with electrical shunt circuit means.

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200, Electricity: Circuit Makers and Breakers,   for shunt circuit closing devices for multiple control (loop), subclass 51.5 for short circuit closing devices actuated by the separation of coupling members and subclass 51.11 for shunt circuit closing devices wherein the switch is in parallel with the coupling contacts.
315, Electric Lamp and Discharge Devices: Systems,   subclasses 74+ and 119+ for electric lamp and electric space discharge device systems, provided with automatic shunt circuit closing means.
  
[List of Patents for class 337 subclass 16]    16Bimetallic means:
 This subclass is indented under subclass 15.  Subject matter wherein the shunt circuit completing means comprises at least one bimetallic device, i.e., an element consisting of at least two solid strips or bars formed of materials having different coefficients of expansion.

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290, Prime‐Mover Dynamo Plants,   subclass 38 for electrical starting motors which may have bimetallic means shunting the starting resistance.
315, Electric Lamp and Discharge Devices: Systems,   appropriate subclasses, especially subclasses 74 and 83 for load devices with electrical circuits and temperature modifying means utilizing bimetallic shunting means.
324, Electricity: Measuring and Testing,   subclasses 105+ for electrical measuring devices with bimetallic shunting means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 12 for automatic circuit interrupting devices with shunting contacts and subclasses 35+ for plural means for operating automatic trip means one of which may be a shunt contact operated by bimetallic means.
338, Electrical Resistors,   subclass 31 for resistors with mechanical variation means which is thermally responsive and subclass 215 for a resistance with a switch, i.e., shunt.
361, Electricity: Electrical Systems and Devices,   subclasses 139+ for electric circuits for relays and electromagnets, especially subclasses 163+ for bimetallic elements shunting a resistance.
  
[List of Patents for class 337 subclass 17]    17Fusible material combined with gap:
 This subclass is indented under subclass 15.  Subject matter relating to a device wherein during normal conditions of a circuit at least two contacts or electrodes are separated by an insulating gap which is bypassed by a fuse and upon the occurrence of abnormal conditions in the circuit causing failure of the fuse current is allowed to pass directly between the contacts or electrodes. The thermo responsive fusible means usually comprises latching or holding means releasable, when subject to overheating, to allow the main contacts to close.

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31,for fusible structure combined with a spark gap or lighting arrester means.

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338, Electrical Resistors,   subclass 215 for fusible elements shunting a resistance.
  
[List of Patents for class 337 subclass 18]    18Gaseous space discharge gap (e.g., air gap):
 This subclass is indented under subclass 17.  Subject matter wherein the insulating gap is an air gap.

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361, Electricity: Electrical Systems and Devices,   subclasses 115+ , especially subclasses 124+ for lightning arresters with fusible links.
  
[List of Patents for class 337 subclass 19]    19Gap with thin film dielectric (e.g., voltage‐responsive):
 This subclass is indented under subclass 15.  Subject matter including contacts or electrodes separated from one another by a film of dielectric material which is adapted to break down upon the impression thereof of an abnormal voltage thereby allowing the setting up of a conductive arc.
  
[List of Patents for class 337 subclass 20]    20With significant housing or casing structure:
 This subclass is indented under subclass 15.  Subject matter relating to a device under the definition of subclass 15 with significant details of a housing or casing structure peculiarly adapted for the claimed device.

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34,for electrothermal switches of the space discharge type with housing or casing.
112+,for electrothermal switches of the bimetallic type with housing or casing.
121,for electrothermal switches of the expansible fluid actuated type with housing or casing.
186+,for electrothermal switches of the fusible element actuated type with housing or casing.
327+,for thermally actuated switches of the expansible fluid type with housing or casing.
380+,for thermally actuated switches of the bimetallic type with housing or casing.
398,for thermally actuated switches of the longitudinally expansible solid element type with housing or casing.
414+,for thermally actuated switches of the fusible element type with housing or casing.
  
[List of Patents for class 337 subclass 21]    21Conductive fluid devices:
 This subclass is indented under subclass 14.  Subject matter wherein the continuity of an electrical circuit is normally maintained through a conductive liquid. Upon the occurrence of an excessive current in the circuit the liquid is vaporized or otherwise dispersed or displaced whereupon the circuit is interrupted. In this subclass the conductive liquid comprises the electrothermal element which is directly in the circuit to be controlled which circuit is completely opened when the liquid is in its operated state.

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80,for electrothermally responsive bimetallically actuated switches with mercury or other conductive liquid contact means.
331,for thermally responsive expansible or vaporizable fluid actuated switches with a conductive liquid comprising the contact material.

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200, Electricity: Circuit Makers and Breakers,   appropriate subclasses, especially subclasses 61.47 , 81.6, and 182+ for mechanical switches with mercury or other liquid contacts.
219, Electric Heating,   subclasses 510+ for automatically operated heating device current supply means with thermally responsive means.
315, Electric Lamp and Discharge Devices: Systems,   appropriate subclasses, especially subclass 362 for a discharge device with a mercury switch in the circuit.
  
[List of Patents for class 337 subclass 22]    22Fluorescent lamp‐starting devices:
 This subclass is indented under subclass 14.  Subject matter relating to structure whereby the voltage or current applied to a fluorescent lamp device is controlled in such a manner as to establish a discharge through the lamp device.

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315, Electric Lamp and Discharge Devices: Systems,   subclasses 94+ , especially subclass 100 for discharge devices with a thermostatic switch in the cathode heater supply circuit.
  
[List of Patents for class 337 subclass 23]    23With significant heating means:
 This subclass is indented under subclass 22.  Subject matter including at least one metallic resistance or other heating means whereby a thermostatic contact actuating means is heated by the current passing through the resistor or other heating means.
(1) Note. For other heating means employed in the devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclasses 103+.
  
[List of Patents for class 337 subclass 24]    24With shunt or short‐circuiting means (for resistor):
 This subclass is indented under subclass 23.  Subject matter including significant structure whereby an electrical shunt circuit is established around the heating means or whereby the heater contacts may be short circuited.

SEE OR SEARCH THIS CLASS, SUBCLASS:

15+,for electrothermal switches with electrical shunt or short circuit completion devices.
125,for electrothermal switches of the longitudinally expansible solid element type with electrical shunting means.
221,for electrothermal switches of the fusible element type with electrical shunting means.
  
[List of Patents for class 337 subclass 25]    25Electric discharge means (e.g., electron‐emissive):
 This subclass is indented under subclass 22.  Subject matter including at least two switch contacts designed to contact with each other to open and/or close an electrical circuit, one of the switch contacts being mounted so as to be moved by a thermostatic element, the contacts, their supports, or lead‐in means being electron emissive so that an electric space discharge can be established between the electron emissive substance and the cooperating contact, when the switch contacts are in open circuit position, to heat the thermostatic element thereby actuating the movable contact or contacts.
(1) Note. In some of the patents in this subclass the switch contacts are normally separated when no current is being supplied to the circuit which includes the switch contacts. The electric space discharge being established when the current is supplied to the circuit, the space discharge then heating the thermostatic element so that the switch contacts are moved to circuit closing position to establish a conductive path through the electrodes and thereby short circuiting the electric space discharge. This subclass also includes patents where the switch includes means other than the glow discharge, such as electric heating means, the glow discharge being used in conjunction with the other heating means to cause the switch contacts to be moved into open or closed circuit condition.
(2) Note. The circuit makers and breakers in this subclass are often used with glow discharge lamps which require preheating of the filamentary electrodes before an electric space discharge can be established between such filamentary electrodes.
(3) Note. The circuit makers and breakers in this subclass are somewhat analogous in structure to electric space discharge devices of the arc drawing type having two electrodes, at least one of which is electron emissive, which are normally in contact when the supply circuit is open and which are separated by any suitable means, such as thermostatic means, to establish the space discharge when potential is applied to the discharge device. For such discharge devices, Search Classes 313 and 314 in the appropriate subclasses.
  
[List of Patents for class 337 subclass 26]    26With significant contact structure or composition:
 This subclass is indented under subclass 22.  Subject matter including specific details of contact arrangement, structure or composition of material.
(1) Note. Contact structure or composition will also be found in the following subclasses of this class.

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109,electrothermally actuated switches of the bimetallic type.
122,electrothermal switches of the expansible fluid type.
137,electrothermally actuated switches of the longitudinally expansible solid type.
251+,electrothermally actuated switches of the fusible element cartridge or tube type.
268+,electrothermally actuated switches of the fusible element plug type.
273+,thermally actuated switches of the bimetallic type.
329+,thermally actuated switches of the expansible fluid type.
399+,thermally actuated switches of the longitudinally expansible solid type.
413,thermally actuated switches of the fusible element type.
  
[List of Patents for class 337 subclass 27]    27Bimetallic element:
 This subclass is indented under subclass 26.  Subject matter wherein the contact structure includes at least one bimetallic element whereby an electrical path through the switch is controlled by the heating and/or cooling of the bimetallic element functioning directly as one of the current carrying contact.

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85+,for electrothermally actuated switches of general application wherein the movable contact, or contacts, is directly attached to the bimetallic element.
  
[List of Patents for class 337 subclass 28]    28Space discharge device (gaps, lightning arrester, etc.):
 This subclass is indented under subclass 14.  Subject matter relating to the structure of an electrothermal current device under the class definition combined with further protective means comprising a normally open gap whereby a discharge may take place between the line contacts when open or between one of the line contacts and ground.

SEE OR SEARCH CLASS:

313, Electric Lamp and Discharge Devices,   appropriate subclasses for electric space discharge devices in general.
315, Electric Lamp and Discharge Devices: Systems,   subclasses 56+ for discharge devices acting as a load and combined with an impedance and subclasses 119+ for discharge devices with a cut out.
361, Electricity: Electrical Systems and Devices,   subclasses 117+ for lightning arresters generally.
439, Electrical Connectors,   subclass 182 for a lamp or electron tube socket including arc suppressing means, which means may comprise a protective air gap type discharge device; and subclass 620.26 for an electrical connector combined with a named fuse or comprising a casing, housing, or holder for receiving and fully enclosing a fuse.
  
[List of Patents for class 337 subclass 29]    29Plural:
 This subclass is indented under subclass 28.  Subject matter including at least two or more electrothermal switching devices combined with at least one protective gap or at least two or more protective gaps combined with a single art type switching device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

42+,for electrothermally actuated plural switches of the bimetallic type.
338+,for thermally actuated plural switches of the bimetallic type.
  
[List of Patents for class 337 subclass 30]    30With explosive or combustible material:
 This subclass is indented under subclass 28.  Subject matter including structure comprising an arc gap in combination with an explosive charge whereby should the arc gap fail to interrupt the current flow the explosive charge will be detonated. The subject matter to be found here may include (a) arresters with an explosive or (b) an arrester in combination with any art type circuit interrupter such as fuses, bimetallic means, etc., with the further addition of an explosive charge.

SEE OR SEARCH THIS CLASS, SUBCLASS:

243,for electrothermally fusible link actuated switches with chemical (e.g., explosive) indicating means.
401+,for thermally actuated switches of the fusible combustible or explosive material.

SEE OR SEARCH CLASS:

315, Electric Lamp and Discharge Devices: Systems,   subclasses 111.01+ for discharge device load with fluent material supply to the discharge space.
361, Electricity: Electrical Systems and Devices,   subclasses 124+ for lightning arrester with electrothermal fusible or explosive material.
  
[List of Patents for class 337 subclass 31]    31With fusible element (e.g., cutout means):
 This subclass is indented under subclass 28.  Subject matter relating to significant spark gap structure in combination with fusible cut out means or a fusible material controlled switch means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4+,for fusible element device and diverse art type switching device.
17+,for electrothermal switch having fusible material combined with gap.
142+,for electrothermal switches of the fusible element actuated type in general.
401+,for thermally actuated switches in general of the fusible, combustible or explosive material type.

SEE OR SEARCH CLASS:

361, Electricity: Electrical Systems and Devices,   subclasses 124+ for lightning arrester with fusible means.
  
[List of Patents for class 337 subclass 32]    32With grounding means:
 This subclass is indented under subclass 31.  Subject matter including a plate or other grounding terminal means, whereby, upon the occurrence of an abnormal voltage, a current discharge takes place to ground with the gap resuming a nonconducting condition when the voltage returns to normal value.

SEE OR SEARCH THIS CLASS, SUBCLASS:

199,for electrothermal, fusible element actuated switch having a housing, casing or support with electrical ground, shield or barrier.

SEE OR SEARCH CLASS:

361, Electricity: Electrical Systems and Devices,   appropriate subclasses, particularly subclasses 38+ , 117+ 124+, and 131+ for protective devices of the discharge gap type with grounding means in addition to a fused cut out.
  
[List of Patents for class 337 subclass 33]    33With common structural elements (e.g., fuse provides support or element of spark gap structure):
 This subclass is indented under subclass 31.  Subject matter including structural elements forming an integral part of or common to both the fusible element cut out means or fusible element controlled switch and the space discharge device. For example; the spark gap structure may provide a mounting or support for the fuse or one fuse cap may also be an electrode in the spark gap circuit.
  
[List of Patents for class 337 subclass 34]    34Housing, casing, mounting or support means:
 This subclass is indented under subclass 28.  Subject matter including significant structural details of housing, casing, mounting or support means peculiarly adapted for use with the subclass 28 type switch or switches.
(1) Note. Housings, casings or supports for devices of this class are provided for in many subclasses herein. For the list of such subclasses, see subclass 20 under SEARCH THIS CLASS, SUBCLASS.
  
[List of Patents for class 337 subclass 35]    35Plural diverse similar art‐type devices in single switch:
 This subclass is indented under subclass 14.  Subject matter including significant details of two or more thermal current responsive devices cooperatively acting to control a single switch whereby an electrical circuit is opened or closed as a result of existing conditions in both or all of the thermal current responsive devices.

SEE OR SEARCH THIS CLASS, SUBCLASS:

38+,for plural electrothermal bimetallic elements combined with a single mechanical contact operating means.
144,for plural electrothermal fuses in a single switch.
335+,for plural thermal actuated bimetallic devices in a single switch.

SEE OR SEARCH CLASS:

60, Power Plants,   subclasses 516+ for expansion and contraction type power plants with plural diverse electrothermal switches in the control circuit.
200, Electricity: Circuit Makers and Breakers,   appropriate subclasses, especially subclasses 81+ for fluid pressure control switches with plural operators.
219, Electric Heating,   subclasses 510+ for electrical heating devices with plural electrothermal operated switches in the supply circuit.
236, Automatic Temperature and Humidity Regulation,   subclasses 91+ for thermostatic control or regulating means with plural thermally operated elements.
340, Communications: Electrical,   subclasses 584+ for alarm systems with diverse temperature sensors.
  
[List of Patents for class 337 subclass 36]    36With bimetallic elements (i.e., motion takes place in a plane at right angles to its major axis):
 This subclass is indented under subclass 14.  Subject matter including at least one electrothermal temperature responsive composite element consisting of two different metals, bonded together, and having different coefficients of expansion such that when heated by a thermal current a bending motion of the composite element results. The resultant motion is utilized either directly or through an intermediate mechanical means to control the opening and/or closing of an electrical circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3,for electrothermal responsive switching means combined with a diverse art switching means.
13,for an electrothermal element combined with a diverse art control means cooperatively operating the same set of contacts.
35,for plural diverse similar art type electrothermal operating means in a single switch.
333+,for thermally actuated bimetallic actuated switches.

SEE OR SEARCH CLASS:

219, Electric Heating,   subclass 494 for heaters with current control means including bimetallic elements and subclass 510 for electric heaters with bimetallic element actuated switch means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 145 for electromagnetically actuated switches with bimetallic elements.
361, Electricity: Electrical Systems and Devices,   subclasses 1+ , especially subclasses 23+ for electrical safety and protective systems including bimetallic switch means, and subclasses 161+ for electric circuits for relays and electromagnets including bimetallic switches.
  
[List of Patents for class 337 subclass 37]    37With manual or other mechanical contact controlling means:
 This subclass is indented under subclass 36.  Subject matter comprising manual or other mechanical means acting conjointly or cooperatively with at least one bimetallic device, or which acts as an intermediary between an electrothermal responsive bimetallic element and at least one movable contact thereby opening or closing an electrical circuit. The manual means may be a handle or push button actuated means, for instance, or the other mechanical means may be a motor, for example.

SEE OR SEARCH THIS CLASS, SUBCLASS:

334+,for thermally responsive bimetallic actuating means combined with manual or other contact control means.

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219, Electric Heating,   subclass 491 for electric heaters with combined bimetallic and electro‐mechanical automatic control means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 23 for magnetically actuated circuit breakers having combined bimetallic latch trip means, and subclass 43 for bimetallic latching or tripping means combined with mechanical contact actuating means.
  
[List of Patents for class 337 subclass 38]    38Plural elements combined with single mechanical means:
 This subclass is indented under subclass 37.  Subject matter including at least two or more electrothermal current responsive bimetallic elements, combined with a further single mechanical contact controlling means. The bimetallic elements may operate jointly or individually to control the movable contact or contacts through the agency of the mechanical means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

335,for plural thermally actuated bimetallic elements in a single switch.

SEE OR SEARCH CLASS:

99, Foods and Beverages: Apparatus,   subclasses for cooking apparatus of the electric heater type having electrothermal control or switch means.
200, Electricity: Circuit Makers and Breakers,   subclass 3 , for multiple circuit control devices with plural electrothermal means, and subclasses 81+ for fluid pressure actuated switched with plural operators of which two or more may be temperature responsive.
361, Electricity: Electrical Systems and Devices,   subclasses 62+ , 71+, 88+, and 103+ for electrical protective devices with plural operators which may be bimetallic.
  
[List of Patents for class 337 subclass 39]    39Independently operative bimetallic elements:
 This subclass is indented under subclass 38.  Subject matter wherein each of the electrothermal current responsive elements is adapted to operate independently of each of the others in a manner to cause the operation of the movable contact or contacts.
  
[List of Patents for class 337 subclass 40]    40Individually responsive to diverse conditions or diverse characteristics:
 This subclass is indented under subclass 38.  Subject matter wherein each of the electrothermal current responsive elements is responsive to diverse environmental conditions; such as, thermal current and atmospheric conditions, or of diverse operating characteristics whereby the opening or closing of an electrical circuit is a resultant of the operative condition of all the elements.
  
[List of Patents for class 337 subclass 41]    41Multiple contact or plural circuit control means:
 This subclass is indented under subclass 37.  Subject matter including a plurality (three or more) of contacts associated with a single continuous electric circuit to be controlled or includes means whereby two or more continuous electric circuits are controlled by the contact controlling means.
(1) Note. This subclass includes subject matter under subclass 37 wherein the structure includes a plurality of devices falling under the definition of subclass 37 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 with each of two fixed contacts whereby varying the direction of current in the two conductors of a single circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

11,for fusible element switching device with multiple circuit connector and diverse art type switch.
145,for electrothermal fusible element multiple contact switches.
338+,for thermally actuated switches of a similar construction.
406,for thermally actuated fusible, combustible or explosive material switches with multiple contacts.
  
[List of Patents for class 337 subclass 42]    42Plural switches:
 This subclass is indented under subclass 41.  Subject matter comprising at least two or more separate distinct and independently operative switch devices whereby two or more separate and distinct electrical circuits may be controlled.
(1) Note. For devices wherein one set of contacts or one electrical circuit controls a heater means for one or more electrothermal current responsive actuating means. See subclasses 102+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

29,for plural electrothermal switches with space discharge devices.
144,for electrothermal fuses with single mechanical control means.
338,for similar devices actuated by thermally responsive bimetallic elements.
  
[List of Patents for class 337 subclass 43]    43With interlocking means:
 This subclass is indented under subclass 42.  Subject matter including means whereby the plural switching devices are rendered interdependent, one or the other, thereby being caused to operate alternately, successively, or selectively, the operation of each depending upon conditions in at least one other. For example, one device is prevented from operation while another is in an operated position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

339,for similar devices with thermally responsive bimetallic means.
  
[List of Patents for class 337 subclass 44]    44Selectively or alternately actuated:
 This subclass is indented under subclass 41.  Subject matter including significant means whereby each of a plurality of contact pairs may be actuated selectively, alternately or sequentially. The movable contact may be a single contact common to each pair, i.e., may constitute the movable contact for each pair selectively.

SEE OR SEARCH THIS CLASS, SUBCLASS:

340,for switches of similar type with thermally responsive bimetallic element actuator.

SEE OR SEARCH CLASS:

99, Foods and Beverages: Apparatus,   subclasses 325+ for cooking apparatus with automatic control utilizing thermoelectric means controlling a plurality of circuits.
200, Electricity: Circuit Makers and Breakers,   subclasses 35+ for mechanical clock train operated switches with plural contacts and bimetallic latching or holding means.
219, Electric Heating,   subclasses 510+ for electric heating devices with thermally controlled switching means having plural contacts.
307, Electrical Transmission or Interconnection Systems,   subclasses 112+ , especially subclasses 116+, for electrical switching systems having heat responsive means which may be bimetallic.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 106+ for magnetically actuated switches of the plural contact type.
  
[List of Patents for class 337 subclass 45]    45Single multipole or polyphase control devic:
 This subclass is indented under subclass 41.  Subject matter comprising a plurality of individual conductors with contact pairs associated with each conductor, a contact actuating means for each contact actuating means for each contact pair, each contact pair completing a circuit through one branch of a polyphase or plural conductor electrical circuit. 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:

7,for diverse art type switch and multipole circuit breaker with bimetallic device.
146,for similar electrothermal multipole or polyphase switches of the fusible element actuated type.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   subclass 3 for multiple circuit control devices of the mechanical type with bimetallic elements, subclasses 411+, 415, and 424 for snap type circuit breakers with thermally actuated latch trip means.
307, Electrical Transmission or Interconnection Systems,   subclass 117 for switching systems with electrothermally actuated means.
318, Electricity: Motive Power Systems,   appropriate subclasses for automatic electric motor control devices operating from three phase sources and including electrothermal elements.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 8+ for electromagnetically circuit breakers with thermally actuated latch or trip means subclasses 35+ for plural latch or trip means including thermally actuated means.
361, Electricity: Electrical Systems and Devices,   subclasses 1+ for protective systems and devices of special types which may be combined with the bimetallic elements.
  
[List of Patents for class 337 subclass 46]    46With common mechanical actuating or tripping means:
 This subclass is indented under subclass 45.  Subject matter including a single means whereby the plurality of phase or leg contact pairs are simultaneously actuated to or from a closed circuit condition or maintained in a first position until released whereupon the plurality of contact pairs are allowed to move to another condition simultaneously.

SEE OR SEARCH THIS CLASS, SUBCLASS:

55,for electrothermal snap action bimetallic element switches with latch.
70,for electrothermal bimetallic element switch with latch.
128+,for electrothermal switches of the longitudinally expansible element type with latching or tripping means.
150+,for electrothermal switches of the fusible element type with latch, trip or holding means.
174+,for electrothermal switches of the fusible element type with cut out or drop out having latch, trip or holding means.
356+,for thermally actuated bimetallic element switches with latch.
385,for thermally actuated expansible element switches with latch.
411,for thermally actuated fusible, combustible or explosive material actuated switches with latch, trip or holding means.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   appropriate subclasses, especially subclass 401 , for polyphase mechanical circuit breakers with a common operating means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 6+ for electromagnetically actuated polyphase circuit breakers with a common control means.
361, Electricity: Electrical Systems and Devices,   subclasses 23+ and 103+ for circuit breakers systems in general which may be combined with electrothermal means.
  
[List of Patents for class 337 subclass 47]    47With separate latching or tripping means in each phase:
 This subclass is indented under subclass 45.  Subject matter including individual latching or tripping means associated with each separate phase or leg contact pairs thereof. Each individual latch or trip means may operate individually on its corresponding contact pair or may upon operation actuate a tripping bar whereby the remaining contact pairs are permitted to move to another position.
(1) Note. Latches, trips or holding means therefore for devices of this class are provided for in many subclasses herein. See SEARCH THIS CLASS, SUBCLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

46,for a list of subclasses providing for latches, trips or holding means therefor for devices of this class.

SEE OR SEARCH CLASS:

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 9 for electromagnetically controlled circuit breakers with individual separate latch or trip means in each phase.
  
[List of Patents for class 337 subclass 48]    48With common trip‐bar means:
 This subclass is indented under subclass 47.  Subject matter including a single bar or other device operatively connected to each of the individual latching or tripping means whereby upon actuation of any one of the means all of the contact pairs are allowed to move to another position.
  
[List of Patents for class 337 subclass 49]    49Slidable or reciprocal bar:
 This subclass is indented under subclass 48.  Subject matter wherein the tripping structure comprises a bar means operable in a slidable or reciprocal manner in a fixed path common with the longitudinal axis of the bar.
  
[List of Patents for class 337 subclass 50]    50Rotatable:
 This subclass is indented under subclass 48.  Subject matter wherein the tripping structure comprises a means whose primary motion is a circular or rotating motion about a fixed axis.
  
[List of Patents for class 337 subclass 51]    51Cyclically or periodically actuated:
 This subclass is indented under subclass 37.  Subject matter including significant details of means whereby a circuit is intermittently or cyclically opened and closed at constantly recurring intervals under the influence of a thermal current responsive bimetallic device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

92+,for electrothermally actuated bimetallic elements directly actuating the movable contact of a switch in a cyclic or periodic manner.
369,for thermally actuated bimetallic, cyclic or periodic type switch.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   subclasses 19.01+ for periodic switches which may include electrothermal elements.
219, Electric Heating,   subclasses 490+ for heating devices with automatic timing or cycling control means.
236, Automatic Temperature and Humidity Regulation,   subclass 46 for automatic temperature control devices with timing means and subclasses 91+ for thermostatic controls which may be cyclic or periodically operative.
307, Electrical Transmission or Interconnection Systems,   subclass 132 for electrical switching systems with repetitive operation and subclass 141 for switch operating means with time delay.
315, Electric Lamp and Discharge Devices: Systems,   subclasses 209+ for systems comprising a lamp or discharge device with a periodic switch in the supply circuit.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 87+ for electromagnetically actuated periodic switches, for instance vibrators.
340, Communications: Electrical,   subclasses 914+ for time cycling traffic systems, subclasses 81+ for flashing signal light systems.
  
[List of Patents for class 337 subclass 52]    52With spring or other energy storage device:
 This subclass is indented under subclass 37.  Subject matter including spring or other potential energy storage means whereby a major portion of the force exerted in actuating the contacts of the switch from one condition to another is derived.
(1) Note. The actuating force is usually transmitted to the movable contact structure through mechanical means upon the spring being released from its energy storage position. Devices in which the spring means acts only as a biasing means or a source of contact pressure will not be classified here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

67,for devices in which the spring means acts only as a biasing means or a source of contact pressure.
239+,for electrothermal fuse with spring tensioned fuse link.
317+,for thermal expansible fluid switch with spring means.
342+,for similar type switches with thermally responsive bimetallic actuating means.
388+,for thermal expansible element switch with spring means.
407,for thermal fusible element switch with spring means.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   subclasses 402+ for mechanical snap action switches with spring means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 6+ for electromagnetically operated automatic circuit breakers utilizing a tensioned spring in the contact actuating means and subclass 188 for specifically claimed snap acting contact control structure.
  
[List of Patents for class 337 subclass 53]    53Snap‐action:
 This subclass is indented under subclass 52.  Subject matter comprising means whereby a movable contact or contacts, may be operated from a first position to a second position quickly, as by a snap action, the contacts motion being independent of the rate of movement of the operator. This is usually accomplished by a spring connection between the operator and the contact carrier so arranged that the initial movement of the operator places the spring under tension whereby upon release of a holding means the contact is snapped from one position to another by action of the spring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89+,for electrothermal bimetallic element switch with snap action.
131+,for electrothermal longitudinally expansible element switch with snap action means.
147,for electrothermal fusible element switch with snap action means.
318,for thermally actuated expansible fluid snap action switch.
343,for similar devices with thermally responsive bimetallic actuating means.
365+,for thermally actuated bimetallic element snap action switches.
390+,for thermally actuated longitudinally expanding element snap action switch.
  
[List of Patents for class 337 subclass 54]    54With magnetic flux source (e.g., magnetic armature):
 This subclass is indented under subclass 53.  Subject matter including means for setting up a field of magnetic flux whereby the actuation of the movable contact, or contacts, is at least in part influenced by magnetic force operative within the flux field.

SEE OR SEARCH THIS CLASS, SUBCLASS:

90,for electrothermal, bimetallic element snap action switch with magnetic armature.
134,for electrothermal, longitudinally expansible element snap action switch with magnetic biasing or holding means.
344,for similar devices with thermally actuated bimetallic elements.
366,for thermally actuated bimetallic snap action switch with magnetic flux source.
  
[List of Patents for class 337 subclass 55]    55With latching or holding means:
 This subclass is indented under subclass 53.  Subject matter including means whereby at least one set of contacts may be restrained in one of the two normal conditions (open or closed). The latching or holding means usually consists of a thermal current responsive bimetallic element adopted for mechanically maintaining a snap acting contact actuating means, such as a toggle arrangement, in a given position independently of other control means so that once the contacts are opened closed they will be constrained to remain in this position until the occurrence of an abnormal condition causes the actuating means to be released.
(1) Note. Latches or trips for devices of this class are provided for in many subclasses herein. See under SEARCH THIS CLASS, SUBCLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

46,for a list of subclasses providing for latches, trips or holding means therefor for devices of this class.
343+,for similar devices utilizing thermally responsive bimetallic devices.

SEE OR SEARCH CLASS:

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 167+ for latching means for electromagnetically operated switches.
  
[List of Patents for class 337 subclass 56]    56With reclosing or reset means:
 This subclass is indented under subclass 53.  Subject matter including significant means whereby after the movable contact, or contacts, of the device has been actuated from one original condition to another operated condition, due to an abnormal thermal current condition in the device, or by manual manipulation, the contacts may be returned to the original condition either automatically or manually, or means whereby a latching or holding mechanism is reset to an operative condition wherein the contact control means will be rigidly held in the original condition until released by operation of the thermal current responsive device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

91,for electrothermal bimetallic element snap action switch with reset means.
348,for similar art devices utilizing thermally responsive bimetallic devices.
367,for thermally actuated bimetallic snap action switch with reset means.

SEE OR SEARCH CLASS:

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 26+ for electromagnetically operated circuit breakers with reclosable or resetting means.
  
[List of Patents for class 337 subclass 57]    57With adjusting or calibration means:
 This subclass is indented under subclass 53.  Subject matter including means whereby some operative characteristic of the specific snap acting contact controlling structure or the thermal current responsive element may be adjusted at will or calibrated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

319,for thermal, expansible fluid, snap action switch with adjusting, calibrating or compensating means.
347,for similar devices utilizing thermally responsive bimetallic elements.
368,for thermally actuated bimetallic element snap action switch with adjustment or calibration means.
  
[List of Patents for class 337 subclass 58]    58Compound motion means:
 This subclass is indented under subclass 52.  Subject matter wherein the mechanical contact controlling means consists of structure comprising a mechanical linkage whereby the movement of a movable contact or contacts results from a force applied thereto as a final result of a conversion of a force applied in a first direction to a force applied in a second direction; for example, a linear first motion may be converted to a rotary motion about a fixed origin or pivot as by a toggle linkage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

313,for thermal expansible fluid actuated switch with compound motion linkage.
350,for similar devices utilizing thermally responsive bimetallic elements.

SEE OR SEARCH CLASS:

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 191 for compound motion contact actuating means for electromagnetic switches.
  
[List of Patents for class 337 subclass 59]    59Toggle:
 This subclass is indented under subclass 58.  Subject matter relating specifically to toggle mechanism.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53,for snap acting switches which may employ toggle mechanisms.
132,for longitudinally expansible element actuated snap switches with toggle spring.
345,for thermally responsive, bimetallic element switch actuating means operating a toggle linkage.

SEE OR SEARCH CLASS:

74, Machine Element or Mechanism,   subclasses 520+ for mechanical movements comprising toggle structure.
  
[List of Patents for class 337 subclass 60]    60Floating lever:
 This subclass is indented under subclass 58.  Subject wherein at least one structural element, comprising the mechanical contact controlling means, consists of a lever of the first, second or third class with no fixed pivot, that is, when forces are applied at two points motion takes place about a third point, the third point being movable in space, the torque about the third point being variably related to its position.

SEE OR SEARCH CLASS:

74, Machine Element or Mechanism,   subclasses 519+ for mechanical movements comprising lever structure.
  
[List of Patents for class 337 subclass 61]    61Rotary or oscillatory motion device (e.g., spring motor):
 This subclass is indented under subclass 52.  Subject matter including means whereby contact opening or closing is accomplished by operation of a mechanical device moving in a rotary or oscillatory manner in a single plane; for example, circular movement in a horizontal or vertical plane with a reversal of direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10,for electrothermal or thermal switch of this class with diverse art type switch including rotary mechanism.
149,for electrothermal fusible element switch with rotary actuator.
316,for thermal expansible fluid operated switch with rotary or oscillatory device.
351,for similar devices utilizing thermally responsive bimetallic elements.
410,for thermal switches of the fusible element type with rotatable contact actuator.

SEE OR SEARCH CLASS:

185, Motors: Spring, Weight, or Animal Powered,   subclasses 37+ for spring motors, per se.
200, Electricity: Circuit Makers and Breakers,   subclasses 19.01+ for periodic mechanical switches utilizing a rotary motion and subclasses 465+ for mechanical rotary switches.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 76 for electromagnetically operated switches with spring motor means.
  
[List of Patents for class 337 subclass 62]    62Reciprocating or slidable motion device:
 This subclass is indented under subclass 52.  Subject matter wherein the mechanical actuating means comprises structure whereby contact opening or closing results from a sliding or reciprocating motion in a single plane by the contact carrier. The contact carrier or actuating means is generally spring biased to open position and held closed by a latch under the influence of a bimetallic element, which upon heating releases the latch and allows the contact control means to move the contacts to open position under the influence of the spring means.
(1) Note. Reciprocating or slidable motion mechanisms of this class are provided for in many subclasses herein. See under SEARCH THIS CLASS, SUBCLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10,for a list of such subclasses providing for reciprocating or slidable motion mechanisms of this class.
335,below, for similar devices utilizing thermally responsive bimetallic elements.
  
[List of Patents for class 337 subclass 63]    63With lost motion coupling means:
 This subclass is indented under subclass 62.  Subject matter wherein the mechanical contact controlling structure includes significant details of means whereby upon application of force to a driver element a certain interval of time elapses, or a certain amount of motion of the driver takes place, before the driving force becomes effective to actuate the movable contact means.
  
[List of Patents for class 337 subclass 64]    64With camming or wedging means:
 This subclass is indented under subclass 62.  Subject matter wherein the mechanical contact controlling structure includes camming or wedging means whereby a force is transmitted from a driver element to a driven element through the principle of friction in such a manner that the contacts are positioned from a first or operated condition to a second nonoperated condition as a direct result of the frictional force generated.
  
[List of Patents for class 337 subclass 65]    65With contact guiding or alignment means:
 This subclass is indented under subclass 62.  Subject matter wherein the mechanical contact controlling structure includes guiding means whereby the movable contact carrier is restricted to a fixed reciprocatory path.
  
[List of Patents for class 337 subclass 66]    66With push‐button actuating means:
 This subclass is indented under subclass 62.  Subject matter wherein the manual or other mechanical contact controlling means is specifically recited as comprising manual push button means.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   subclasses 520+ for mechanical push button switches.
  
[List of Patents for class 337 subclass 67]    67With contact pressure maintaining or adjusting means:
 This subclass is indented under subclass 37.  Subject matter wherein the contact controlling structure includes significant details of means whereby a predetermined or constant pressure is applied to the contacts while in the circuit closing position or whereby such contact pressure may be adjusted at will.

SEE OR SEARCH THIS CLASS, SUBCLASS:

349,for similar devices utilizing thermally responsive bimetallic devices.

SEE OR SEARCH CLASS:

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 194+ for contact pressure maintaining or adjusting means for electromagnetically operated switches.
  
[List of Patents for class 337 subclass 68]    68With direct contact separating means (e.g., plunger camming means):
 This subclass is indented under subclass 37.  Subject matter wherein the manual or other mechanical contact controlling means includes plunger or other means whereby the electrical circuit is completed or interrupted by the insertion between or withdrawal of an intermediate member directly between the contacts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

148,for electrothermally actuated switches with fusible elements combined with a plunger or striker pin for separating the contacts.
  
[List of Patents for class 337 subclass 69]    69Independently operative (nontrip‐free):
 This subclass is indented under subclass 37.  Subject matter including significant structure of both bimetallic and either manual or other contact actuating or controlling means, the different means being operative separately and distinctly to open and close the contacts, independently each of the other.
(1) Note. Subclass 74 provides for mechanisms of the so called trip free type where the mechanical means actuates the contacts into open or closed position and the bimetallic means controls the mechanical means via latching or tripping means. In that type of device the actual control of the contacts is by mechanical means the relationship being such that the contacts cannot be independently manually reclosed as in the device set forth in this subclass (69) while an overload condition exists.
(2) Note. The mechanical operating means to be actuated by the bimetallic element may comprise means released by the bimetallic means acting as a latch whereby the contacts are mechanically operated or closed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

355,for similar devices with thermally responsive bimetallic actuating means.
  
[List of Patents for class 337 subclass 70]    70Latch or latch‐release means:
 This subclass is indented under subclass 37.  Subject matter wherein the mechanical structure includes significant details of operating means whereby the contacts may be retained in a first condition by a latch or detent adapted to be released by the operation of an electrothermal current actuated device. The contacts are usually held latch in a circuit closing position and tripped to open position.
(1) Note. Latches or trips for devices of this class are provided for in many subclasses herein. See under SEARCH THIS CLASS, SUBCLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

46,for a list of subclasses providing for latches, trips or holding means therefor for devices of this class.
128+,for similar devices with longitudinally expansible electrothermal responsive actuating elements.
356+,for similar devices with thermally responsive bimetallic elements.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   appropriate subclasses, especially subclasses 3 , 81, and 318+, for mechanical switch operators with thermally responsive latch trip means.
219, Electric Heating,   subclasses 510+ for electrical heaters with electrothermally actuated switches in the supply circuit utilizing mechanical operating means with a latch.
236, Automatic Temperature and Humidity Regulation,   appropriate subclasses, especially subclasses 3+ , 32, 41+, 46, and 91+, for automatic temperature control circuits utilizing thermostatic latch or trip means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 21+ , 141+, 167+, and 172+ for electrothermally responsive bimetallic latch or trip means for operation with electromagnetic switches.
  
[List of Patents for class 337 subclass 71]    71Plural or responsive to diverse effects:
 This subclass is indented under subclass 70.  Subject matter wherein the latching or latch releasing structure includes significant details of a bimetallic device cooperatively combined with another art or a similar art device or wherein the device is responsive to more than a single actuating condition. For example; the latch means may be actuated by or released by a thermal current responsive device assisted by a mechanical impact member, or by a magnetic field means.

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335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   appropriate subclasses for electromagnetically actuated latch or trip means combined with electrothermal elements in a magnetic circuit breaker.
  
[List of Patents for class 337 subclass 72]    72With reclosing or reset means:
 This subclass is indented under subclass 70.  Subject matter including significant details of means whereby the claimed latch or latch tripping device may be returned to its normal operative condition after having completed the transition to an unoperative condition.

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335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   appropriate subclasses for similar devices combined with or adapted for use with an electromagnetic switch.
  
[List of Patents for class 337 subclass 73]    73Automatic:
 This subclass is indented under subclass 72.  Subject matter wherein the reclosing or reset structure includes significant details of means whereby the reclosing or resetting action takes place automatically.
  
[List of Patents for class 337 subclass 74]    74Trip‐free:
 This subclass is indented under subclass 70.  Subject matter wherein the latch or latch release structure includes significant details of means which is operative, upon the occurrence of an 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 contact 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.

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335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 24+ for similar devices combined with or particularly adapted for use in electromagnetic circuit breakers.
  
[List of Patents for class 337 subclass 75]    75Bimetallic element unitary with or comprising latch means:
 This subclass is indented under subclass 70.  Subject matter wherein the latch structure comprises at least one bimetallic element which directly constitutes the latching means by which the main switch contacts are prevented from moving from one condition to another. The actual detent means may be rigidly attached to the bimetallic element in such a manner as to form a continuation thereof.

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359,for similar devices utilizing thermally actuated bimetallic elements.
  
[List of Patents for class 337 subclass 76]    76Performs dual functions (e.g., main contact):
 This subclass is indented under subclass 70.  Subject matter wherein the bimetallic element is specifically described as performing another function other than the primary or latching function. For example, the element may constitute a contact bridging means or even one of the main switch contacts.
(1) Note. The line between the apparatus found in this subclass and that to be found in the subclasses 85+ and 362+ is: in this subclass the latch and/or trip comprises a part of a mechanical operating means interposed between the bimetallic actuating means and the main contacts while in the subclasses 85+ and 362+ the bimetallic element actuates at least one movable contact directly without the intervention of any mechanical means.
  
[List of Patents for class 337 subclass 77]    77With external or auxiliary heater:
 This subclass is indented under subclass 70.  Subject matter including auxiliary heating means whereby the bimetallic element is heated from an external source in addition to the current passing directly therethrough.
(1) Note. For other heating means employed in devices of this class, see SEARCH THIS CLASS, SUBCLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

102+,for bimetallic elements in general used as actuating elements and having auxiliary heating means.
103+,for other heating means employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS.
  
[List of Patents for class 337 subclass 78]    78Utilizing plural bimetallic elements:
 This subclass is indented under subclass 70.  Subject matter wherein the latch or latch release structure includes significant details of at least two or more bimetallic elements acting conjointly on a single latch or trip device.
(1) Note. Subclass 101 provides for those devices where the second bimetallic element serves only as an ambient temperature compensating device for the first.
  
[List of Patents for class 337 subclass 79]    79With signal or indicating means:
 This subclass is indented under subclass 37.  Subject matter including significant details of audible or visual means whereby the operative condition, i.e., opened or closed, of the switch is readily ascertainable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

206,for electrothermal fusible element switch with operational condition indicator.
241+,for electrothermal cartridge or tubular fuses with indicating or inspecting means.
265+,for electrothermal plug fuses with indicator.
332,for thermal expansible fluid actuated switch with signal, alarm, or visual indicator.
376,for thermal bimetallic element switch with signal or indicator.
417,for indicators in general specifically adapted for use with electrothermal and thermally actuated switches.

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200, Electricity: Circuit Makers and Breakers,   subclasses 308+ for indicators peculiar to circuit makers and breakers of the mechanical type.
340, Communications: Electrical,   subclasses 635+ for signals and indicators which are automatically responsive to the condition of electrical apparatus.
  
[List of Patents for class 337 subclass 80]    80With mercury or other conductive liquid circuit completion means:
 This subclass is indented under subclass 37.  Subject matter wherein the mechanical contact controlling structure includes significant details of means whereby at least one electrical circuit is completed by means of a conductive liquid such as mercury.

SEE OR SEARCH THIS CLASS, SUBCLASS:

21,for electrothermal actuated switches in in which the electrothermal element itself comprises a conductive fluid.
331,for thermal expansible fluid actuated switch utilizing conductive liquid (e.g. mercury) contact means.

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200, Electricity: Circuit Makers and Breakers,   subclasses 182+ for mercury switches in general.
313, Electric Lamp and Discharge Devices,   subclasses 163+ for electric discharge devices which have a liquid electrode.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 47+ for electromagnetic switches with liquid contacts.
  
[List of Patents for class 337 subclass 81]    81Retarded or delayed action type:
 This subclass is indented under subclass 37.  Subject matter including significant details of means whereby the act of opening or closing of the main switch contacts takes place at an appreciable interval or intervals of time after an actuating force is applied to the contact actuating means or the operative interval is controlled by varying the energizing current applied to the thermal current responsive device; i.e., bimetallic element.

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88,for electrothermal bimetallic element switch with operation retarding or delaying means.
127,for electrothermal longitudinally expansible element switch with delayed action or timing means.
163+,for electrothermal fusible element switch of the delayed action type.
301+,for thermal switches with mechanical timing means.
341,for thermal bimetallic element switch with time delay.

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200, Electricity: Circuit Makers and Breakers,   subclasses 33+ for retarded or delayed acting mechanical switches.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 59+ for retarded or delayed type electromagnetic switches.
361, Electricity: Electrical Systems and Devices,   subclasses 89 , 91.3, and 94+ for safety systems and devices of the time delay type of actuators, and subclasses 195+ for electric circuits for relays and electromagnets with time delay means.
  
[List of Patents for class 337 subclass 82]    82With operating range calibration or adjustment means:
 This subclass is indented under subclass 37.  Subject matter including significant details of means whereby the operative current value, or range of values, sufficient or necessary to actuate the main contact control means and thereby produce an opening or closing thereof action is predeterminedly fixed, varied at will or calibrated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2,for thermal longitudinally expansible element switch with operating range calibration or adjusting means.
57,for snap acting contact operating means with adjusting or calibration means.
94,for similar devices where the contacts are directly operated by a thermal current responsive bimetallic element.
129,for electrothermal longitudinally expansible element switch with latch or trip calibration means.
319,for thermal expansible fluid element snap action switch with adjusting or calibrating means.
323,for thermal expansible fluid actuated switch with operating calibration or adjustment means.
347,for thermal bimetallic element snap action switch with adjusting or calibration means.
360+,for similar devices with thermally responsive bimetallic elements.
368,for thermal bimetallic element snap switch with adjustment or calibration means.

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219, Electric Heating,   subclass 515 for electric heaters with adjustable thermally responsive operative means in the current supply circuit.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 45 for electromagnetic tripping means having regulating, adjusting or calibrating means.
  
[List of Patents for class 337 subclass 83]    83Comprising electric shunt or short‐circuiting means:
 This subclass is indented under subclass 82.  Subject matter wherein the calibration or adjustment means whereby an electrical shunt circuit is established in parallel with the current path through the bimetallic element or whereby the electrothermal controlling means is short circuited, thereby determining the amount of operative current necessary to actuate the main circuit contacts.

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15+,for electrothermal switches with shunt or short circuit completion devices.
  
[List of Patents for class 337 subclass 84]    84Comprising mechanical means:
 This subclass is indented under subclass 82.  Subject matter wherein the calibration or adjustment means comprises mechanically adjustable elements of structure adapted to be adjusted at will.
  
[List of Patents for class 337 subclass 85]    85Bimetallic element unitary with or directly actuates movable contact means:
 This subclass is indented under subclass 38.  Subject matter wherein the bimetallic element operated switch consists of at least one bimetallic element with direct connection to a movable contact; which contact makes or breaks an electrical circuit under the influence of, or as a result of, the thermal current through the element. Generally, both the bimetallic element and the fixed contact are series connected in the controlled circuit when in a closed circuit condition.

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362+,for similar devices with thermally actuated bimetallic elements.

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219, Electric Heating,   subclasses 510+ for electric heaters with thermally responsive automatic switch means in the supply circuit which may comprise a bimetallic element directly controlling a movable contact.
307, Electrical Transmission or Interconnection Systems,   subclass 117 for heat responsive switching systems utilizing bimetallic elements directly operating a movable contact.
361, Electricity: Electrical Systems and Devices,   subclasses 23+ , 26, 99, 103+, and 161+ for protection systems and devices or electric circuits for relays and electromagnets which utilize bimetallic elements directly controlling at least one movable contact.
  
[List of Patents for class 337 subclass 86]    86Plural contacts or external circuit connection means:
 This subclass is indented under subclass 85.  Subject matter including significant details of at least three or more contacts operative in such a manner that at least two or more separate and distinct electrical circuits may be controlled by the bimetallic contact actuating means. One of the plurality of contacts may be common to more than a single contact pair.

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41,for electrothermally responsive bimetallic means combined with mechanical means for actuating a plurality of contacts or controlling a plurality of circuits.
362,for similar devices utilizing thermally responsive bimetallic elements.
  
[List of Patents for class 337 subclass 87]    87Alternately or selectively actuated:
 This subclass is indented under subclass 86.  Subject matter including significant details of means whereby individual contact pairs connected to external circuits may be actuated in such a manner that a plurality of individually controlled circuits are completed through the switching device selectively, sequentially or alternately.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44,for similar devices utilizing an electrothermally actuated bimetallic device combined with mechanical contact control means.
364,for similar devices utilizing thermally responsive bimetallic actuating means.

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200, Electricity: Circuit Makers and Breakers,   subclass 3 for mechanical multiple circuit control with thermal current actuated means and subclasses 175+ for telephone type automatic multiple contact selection means which may include electrothermally operated means.
315, Electric Lamp and Discharge Devices: Systems,   subclass 154 for plural load devices selectively controlled by radiant energy (heat) responsive devices.
  
[List of Patents for class 337 subclass 88]    88Retarded or delayed type:
 This subclass is indented under subclass 85.  Subject matter including means whereby the opening or closing, of the switch contacts takes place at an appreciable interval of time after an actuating force (overcurrent) is applied to the bimetallic contact actuating means or the timing of the contact open or contact closed interval is effected by varying the energizing current applied to the devices.
(1) Note. For other retarding or delaying means employed in devices of this class, see SEARCH THIS CLASS, SUBCLASS.

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81,for other retarding or delaying means employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS.

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99, Foods and Beverages: Apparatus,   appropriate subclasses particularly subclass 325 for cooking apparatus with thermally actuated automatic control means with timing or time delay means.
200, Electricity: Circuit Makers and Breakers,   particularly subclasses 33+ for mechanically actuated switches with time delay means.
219, Electric Heating,   subclass 329 for electric water heaters with bimetallic switch control means including time delay means, subclass 334, for water heaters with automatic power supply or current control means including timing means and subclasses 492+ for automatic power supply or control means for electric heaters in general with timing or cycling means.
315, Electric Lamp and Discharge Devices: Systems,   appropriate subclasses, especially subclass 77 for electric discharge device systems with thermostatically operated time delay means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 66 for electromagnetically operated switches with electrothermal time delay means.
361, Electricity: Electrical Systems and Devices,   appropriate subclasses, especially subclasses 89 , 91.3, 94+ and subclasses 161+ for thermally actuated control devices with timing or delay means.
  
[List of Patents for class 337 subclass 89]    89Snap‐action:
 This subclass is indented under subclass 85.  Subject matter including means whereby the movable contact, or contacts, may be operated from a first position to a second position quickly, as by a snap action, with the contact motion being independent of the rate of movement of the operator. This may be accomplished by means of a spring, by a permanent magnet or other appropriate means such as an inherent characteristic or structure of the bimetallic element itself.
(1) Note. See the search this class, subclass note below for the line between this subclass and others in this class.
(2) Note. For other snap action mechanisms employed in devices of this class, see SEARCH THIS CLASS, SUBCLASS.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53+,the structure to be found in this subclass (89) is distinguished from that in subclasses 53+ as follows: In the snap actions provided for in subclasses 53+ the contacts are operated by some manual or mechanical means in addition to being operated by the bimetallic element, the contacts not being directly attached to the bimetallic elements in this and the indented subclasses, that is to say the circuit is either open or closed depending entirely on the operative condition of the element. For other snap action mechanisms employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 53.
365,for similar devices utilizing thermally responsive bimetallic elements.
  
[List of Patents for class 337 subclass 90]    90With magnetic armature or holding means:
 This subclass is indented under subclass 89.  Subject matter including means for establishing a field of magnetic flux whereby the actuation of the movable contact, or contacts, is at least in part influenced by magnetic force operative within the flux field. The magnetic flux source is usually a permanent magnet.
(1) Note. For other snap action mechanisms with magnetic control or holding means employed in devices of this class, see SEARCH THIS CLASS, SUBCLASS.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54,for other snap action mechanisms with magnetic control or holding means employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS.
344,for similar devices utilizing thermally actuated bimetallic elements.

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200, Electricity: Circuit Makers and Breakers,   subclasses 402+ for mechanical snap switches with holding means.
236, Automatic Temperature and Humidity Regulation,   appropriate subclasses, especially subclasses 1 , 9, 46, 68, and 91+ for automatic temperature control systems employing bimetallic actuating means with holding means.
290, Prime‐Mover Dynamo Plants,   subclass 38 for electric starting motors employing snap switches with holding means.
313, Electric Lamp and Discharge Devices,   appropriate subclasses, especially subclasses 153+ for electric discharge devices with electrothermal snap switches in the control circuit which employ magnetic means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 141+ for electromagnetically operated switches having electrothermal means which may comprise bimetallic snap switches.
  
[List of Patents for class 337 subclass 91]    91With reset means:
 This subclass is indented under subclass 89.  Subject matter wherein the claimed structure includes significant means whereby; after the movable contact, or contacts, has been actuated from one condition to another condition, the contacts may be returned to the original condition either automatically or manually.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56,above for similar devices employing electrothermal bimetallic actuating means combined with mechanical snap acting means.
368,below for similar devices employing thermally actuated bimetallic means.
  
[List of Patents for class 337 subclass 92]    92Cyclic or repetitively operative (e.g., flashing):
 This subclass is indented under subclass 85.  Subject matter including significant details, specifically recited, of means whereby the contacts of at least one electrical circuit control device are intermittently or cyclically (at regular intervals) opened and closed directly under the influence of a bimetallic actuating element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

51,for similar devices utilizing thermally responsive bimetallic actuating means.
116,for electrothermal expansible fluid actuated switch of the cyclically or periodically operated type.
138,for electrothermal expansible solid element switch of the cyclically or periodically operated type.
302+,for thermal switch with mechanical timing means of the periodic or cyclic type.
369,for similar devices utilizing thermally responsive bimetallic actuating means.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   subclasses 19.01+ for periodically actuated mechanical switches, subclasses 61.27+ for turn indicator type switches with flashing means and subclasses 402+ for cyclically operated snap switches.
219, Electric Heating,   appropriate subclasses, especially subclasses 492+ , for electric heaters with automatic regulating or control means employing cyclically operative switches.
307, Electrical Transmission or Interconnection Systems,   subclass 132 for repetitive make and break switches.
315, Electric Lamp and Discharge Devices: Systems,   subclass 72 for discharge device loads combined with a periodic electric switch.
340, Communications: Electrical,   subclasses 468+ for vehicle signal light systems including those with cyclic light flasher switches.
  
[List of Patents for class 337 subclass 93]    93With interval predetermining or adjustment means:
 This subclass is indented under subclass 92.  Subject matter including significant details of means whereby the period of the complete operational cycle of the switch device may be predetermined or adjusted at will by an operator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

303,for thermal switch with mechanical timing means of the periodic or cyclic type with means for adjusting the period or timing of the cycle of operation.
  
[List of Patents for class 337 subclass 94]    94With operating range, calibration or adjusting means:
 This subclass is indented under subclass 85.  Subject matter including significant details of means whereby the operative current value, or range of values, sufficient or necessary to operate the main contacts from a first (open) to a second (closed) position, predetermined, varied at will or calibrated.
(1) Note. For other calibration or range adjusting means employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 82.

SEE OR SEARCH THIS CLASS, SUBCLASS:

82,for similar devices employing electrothermal responsive bimetallic elements combined with mechanical contact operating means. See (1) Note above.
360,for similar devices employing thermally responsive bimetallic elements.
  
[List of Patents for class 337 subclass 95]    95With plural or combined elements:
 This subclass is indented under subclass 85.  Subject matter including significant details of at least two or more separate and distinct bimetallic elements acting conjointly or cooperatively to control a set of electrical contacts from a first condition to a second condition.
(1) Note. Subclass 101 provides for plural bimetallic element switches in which one or more bimetallic elements act simply as a means for compensation for ambient temperature, or for other external conditions to which the switch is subjected.

SEE OR SEARCH THIS CLASS, SUBCLASS:

38+,above for plural electrothermally responsive bimetallic elements controlling a single switch through mechanical contact operating means.
335+,for similar devices utilizing plural thermally responsive bimetallic elements combined with mechanical contact control means.
370+,for similar devices having the contacts directly controlled by a plurality of thermally responsive bimetallic elements.
  
[List of Patents for class 337 subclass 96]    96Responsive to diverse conditions or of diverse operative characteristics:
 This subclass is indented under subclass 95.  Subject matter wherein at least two of the claimed electrothermal responsive bimetallic elements are described as responsive to diverse environmental conditions, such as operating temperature (e.g., thermal circuit) and atmospheric conditions, or as being of diverse operating characteristics whereby the opening or closing of an electrical circuit takes place as a result of the operating condition of all the elements, acting as a whole.

SEE OR SEARCH THIS CLASS, SUBCLASS:

336,for plural bimetallic elements thermal switches wherein the elements are individually responsive to diverse conditions.
  
[List of Patents for class 337 subclass 97]    97With switch structure protective means:
 This subclass is indented under subclass 36.  Subject matter including significant details of means whereby the switch device is protected from electrical or physical damage; such as contact welding, burning or pitting, physical breakage or damage due to jar, overheating, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

222+,for electrothermal fusible element switches with switch protective means.

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307, Electrical Transmission or Interconnection Systems,   subclasses 134+ for electrical switching systems with self protective features.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 156+ for electromagnetically operated switches with protective means for the switch or contacts and subclass 193 for significant contact actuating with means for preventing vibration, bounce or chatter.
  
[List of Patents for class 337 subclass 98]    98With contact operation inhibiting means (e.g., meltable or magnetic):
 This subclass is indented under subclass 36.  Subject matter including significant details of positive locking or holding means whereby the main contacts are inhibited or restrained from movement by external sources or influence; for instance shock, or accidental motion. The locking devices to be found here generally comprise either mechanical or magnetic devices which may be either manually or automatically operated independent of any latching means which may be present in the device.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   subclasses 6+ for pivoted contact switches with holding coil means and subclasses 43.01+ for switches with unauthorized use prevention devices comprising locks.
307, Electrical Transmission or Interconnection Systems,   subclass 142 for switch actuating means with locking, holding or breaking features.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 77 for motor actuated switches with lock, latch or trip means, subclass 113 for multiple contact automatic telephone switches with holding, locking or latching means, subclasses 157+ for electromagnetic switches with operation inhibiting means and subclasses 167+ for latching means with unwanted contact actuation prevention means.
361, Electricity: Electrical Systems and Devices,   subclass 194 for electric circuits for relays and electromagnets and including holding means.
379, Telephonic Communications,   subclass 195 for automatic telephone switching systems with lockout.
  
[List of Patents for class 337 subclass 99]    99With voltage or ambient temperature compensation means:
 This subclass is indented under subclass 36.  Subject matter including significant details of means whereby any tendencies toward variation of the operative characteristics of a switch device; due to changes in voltage applied to or in external condition, such as the temperature of the surrounding atmosphere, are prevented.

SEE OR SEARCH THIS CLASS, SUBCLASS:

124,for electrothermal, longitudinally expansible solid element switch with voltage or ambient temperature compensation means.
378,for similar devices utilizing thermally responsive bimetallic elements.

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335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 44 for thermally controlled latch or trip means with ambient temperature compensation means.
361, Electricity: Electrical Systems and Devices,   subclass 140 and 164 for electric circuits for relays and electromagnets including means for compensating for thermal changes.
  
[List of Patents for class 337 subclass 100]    100Auxiliary heating means:
 This subclass is indented under subclass 99.  Subject matter wherein the compensating structure includes at least one auxiliary heating means whereby the operating characteristics of the switch are prevented from changing due to variations in the ambient medium.
(1) Note. For other heating means employed in devices of this class, see SEARCH THIS CLASS, SUBCLASS.

SEE OR SEARCH THIS CLASS, SUBCLASS:

102+,for electrothermally operated switches employing bimetallic elements and including further external or auxiliary heating means in addition to the thermal current whereby the operative characteristics of the switch are controlled. Also, for other heating means employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS
377,for similar devices utilizing thermally responsive bimetallic elements.
  
[List of Patents for class 337 subclass 101]    101Bimetallic means:
 This subclass is indented under subclass 99.  Subject matter wherein the compensating structure includes at least one bimetallic element which is wholly responsive to the ambient surroundings.
  
[List of Patents for class 337 subclass 102]    102With external or auxiliary heating means:
 This subclass is indented under subclass 38.  Subject matter including significant details of structure comprising heat generating or concentrating means; such as heating coils or high resistance elements, serving to augment the heating effect of the thermal current traversing the switch.

SEE OR SEARCH THIS CLASS, SUBCLASS:

23+,for fluorescent lamp starting device with heating means.
77,for electrothermal bimetallic switch with latch means having an auxiliary heater.
100,for electrothermal bimetallic switch with voltage or temperature compensation means.
120,for electrothermal expansible fluid actuated switch with external heating means.
182+,for electrothermal fusible element switch with auxiliary or external heating means.
324,for thermal expansible fluid actuated switch with auxiliary heater.
377,for similar devices utilizing thermally responsive bimetallic elements and including electrical heating means which augments the heat derived from the ambient space surrounding the bimetallic element.

SEE OR SEARCH CLASS:

60, Power Plants,   subclass 529 for the combination of a bimetallic thermostatic bar with electric heating means, per se.
62, Refrigeration,   subclass 4 for refrigerator control systems utilizing a bimetallic thermal element with electric heater means.
99, Foods and Beverages: Apparatus,   subclasses 324+ for cooking apparatus with automatic control systems utilizing bimetallic elements with heaters.
123, Internal‐Combustion Engines,   subclass 146.5 for bimetallic sparking devices with electric heaters.
200, Electricity: Circuit Makers and Breakers,   appropriate subclasses, especially subclasses 3 and 52+ for mechanical switches utilizing thermal current responsive bimetallic elements with heater means.
219, Electric Heating,   subclass 511 for automatically operated switching devices for electric heaters, utilizing bimetallic elements with heaters.
236, Automatic Temperature and Humidity Regulation,   appropriate subclasses, particularly subclasses 1 , 46, and 68 for automatic temperature control systems utilizing bimetallic elements with external heating means.
290, Prime‐Mover Dynamo Plants,   subclass 38 for electric starting motors with bimetallic switches with external heaters.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 145 for electromagnetically operated switches, with bimetallic actuating means and having an external heater.
  
[List of Patents for class 337 subclass 103]    103With heater‐adjusting, shunting or short‐circuiting means:
 This subclass is indented under subclass 102.  Subject matter wherein the heating means includes significantly recited structure whereby the operating characteristics of the heater may be varied as by adjusting, shunting or short circuiting means.
  
[List of Patents for class 337 subclass 104]    104Plural heating means:
 This subclass is indented under subclass 102.  Subject matter wherein the heating means consists of at least two or more separate and distinct heating devices capable of acting individually or coordinately to influence the action of at least one bimetallic element.
  
[List of Patents for class 337 subclass 105]    105With electrical power supply or current control means:
 This subclass is indented under subclass 102.  Subject matter wherein the heater structure includes means whereby the current traversing the heating device is maintained at a value between predetermined limits, is caused to flow at predetermined intervals of time or is caused to flow or to be cut off when certain predetermined conditions occur in the switch device.
  
[List of Patents for class 337 subclass 106]    106Inductive means (e.g., transformer):
 This subclass is indented under subclass 105.  Subject matter wherein the power supply or current control means comprises an inductive current source. The inductive current source may comprise inductor windings whose excitation current is derived from the current traversing the bimetallic element.
  
[List of Patents for class 337 subclass 107]    107Significant heating element structure or composition:
 This subclass is indented under subclass 102.  Subject matter wherein the heating structure includes significant details of a basic heating unit adapted to form an element or a subcombination of a more comprehensive combination and adapted for use in a thermal current switch under the class definition.

SEE OR SEARCH CLASS:

29, Metal Working,   subclasses 610.1+ for processes of mechanical manufacture of electrical resistors, per se.
338, Electrical Resistors,   appropriate subclasses for electrical resistors, per se.
  
[List of Patents for class 337 subclass 108]    108Arc or spark gap:
 This subclass is indented under subclass 107.  Subject matter including means whereby the bimetallic element is heated by the arc or discharge current occurring between two electrodes separated by an open gap.

SEE OR SEARCH CLASS:

313, Electric Lamp and Discharge Devices,   appropriate subclasses, especially subclasses 118+ for spark plug type discharge devices.
361, Electricity: Electrical Systems and Devices,   subclasses 117+ for high voltage dissipating gaps to the lightning arrester type, and subclasses 253+ for electric spark gap igniters.
  
[List of Patents for class 337 subclass 109]    109Contact composition or structure:
 This subclass is indented under subclass 36.  Subject matter including significant details of contact structure, composition of material or arrangement peculiarly adapted to be operated through the agency of at least one bimetallic electrothermal current responsive element. The structure usually includes adjustment screw or other means whereby the relative position of the contacts may be varied automatically or at the will of an operator.
(1) Note. For other contact structure or contacts of particular composition employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 26.

SEE OR SEARCH THIS CLASS, SUBCLASS:

373+,for significant contact structure particularly adapted for use in switches utilizing thermally responsive bimetallic devices.

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29, Metal Working,   subclasses 874+ for processes of mechanical manufacture of electrical contacts.
178, Telegraphy,   subclasses 79+ for telegraph transmitters with particular contacts and subclasses 101+ for telegraph keys with significant contact means.
200, Electricity: Circuit Makers and Breakers,   subclasses 275+ for contact structural details.
252, Compositions,   subclasses 500+ for electrically conductive compositions.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 57+ for electromagnetic switches with liquid contacts, subclass 83 for polarity responsive switches with particular contact structure, subclasses 97+ for periodic switches with particular contact structure, subclasses 133+ for particular contact structure or arrangement in multiple contact switches, subclass 154 for vacuum switches with particular contact structure and subclasses 196+ for significant details of the composition of matter or mechanical structure of contact assemblies peculiarly adapted for use in electromagnetic switches.
  
[List of Patents for class 337 subclass 110]    110With arc‐suppression or blowout means:
 This subclass is indented under subclass 36.  Subject matter including significant details of means for preventing the formation of an electric arc when a circuit is broken or smothering such an arc once it forms.

SEE OR SEARCH THIS CLASS, SUBCLASS:

273+,for electrothermally responsive fusible element actuating switches with arc suppression or extinguishing means.

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218, High‐Voltage Switches With Arc Preventing or Extinguishing Devices,   subclasses 1+ for mechanical switches with arc preventing and extinguishing means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 201 for electrothermally controlled switches with arc suppression or extinguishing means.
361, Electricity: Electrical Systems and Devices,   subclasses 2+ for protective devices with arc‐suppression, and subclasses 117+ for high voltage dissipator, per se.
  
[List of Patents for class 337 subclass 111]    111Bimetallic structure or composition of material:
 This subclass is indented under subclass 36.  Subject matter relating specifically to the physical structure of or the composition of matter utilized in the bimetallic element or elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

379,for particular bimetallic structure or composition of material for thermally responsive switches.

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428, Stock Material or Miscellaneous Articles,   subclasses 577+ for an intermediate metallic article or blank, and subclasses 615+ for plural layered metallic stock defined in terms of the composition of its layers.
  
[List of Patents for class 337 subclass 112]    112Housing, casing or support means:
 This subclass is indented under subclass 36.  Subject matter including significant details of housing, casing or support structure, peculiarly adapted for use with electrothermal bimetallic actuated switches.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20,for electrothermal shunt or short circuit switches with housing or casing.
34,for electrothermal switch and space discharge device with housing or casing.
121,for expansible or vaporizable fluid actuated switches with significant housing, casing or support structure.
186+,for fusible element actuated switches with housing, casing or support means.
327+,for thermal, expansible fluid actuated switch with housing or casing.
380+,for similar type switches with significant housing, casing or support means.
398,for thermally responsive longitudinally expansible solid actuated switches with housing, casing or support.
414+,for thermally actuated fuses with housing, casing or support.

SEE OR SEARCH CLASS:

174, Electricity: Conductors and Insulators,   appropriate subclasses, especially subclasses 17 , 18, and 50+ for electrical boxes and housings not limited to use with switches.
200, Electricity: Circuit Makers and Breakers,   subclasses 293+ for mechanical switches with particular casings or bases.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 151+ for vacuum or hermetically sealed electromagnetic switches.
  
[List of Patents for class 337 subclass 113]    113With external circuit connection means:
 This subclass is indented under subclass 112.  Subject matter including significant means associated with the housing or casing whereby an external electrical circuit; which is to be protected, is completely through the switch via housing or casing. As an example the housing may be similar in construction to a fuse cartridge or plug.

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187+,for housing, casing or support means for electrothermally actuated fusible switches with significant external circuit connection means.
381,for thermally responsive bimetallically operated switches with housing, casing or support with external circuit connector means.

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307, Electrical Transmission or Interconnection Systems,   subclasses 112+ for switching systems comprising a switch with terminals.
439, Electrical Connectors,   appropriate subclasses for a detachable electrical connector.
  
[List of Patents for class 337 subclass 114]    114Expansible or vaporizable fluid‐actuated (e.g., mercury vapor):
 This subclass is indented under subclass 14.  Subject matter wherein the electrothermal responsive circuit opening or closing means consists of at least one element which utilizes a fluid medium capable of expanding or vaporizing upon the application of a voltage, potential or heating current thereto, the operation of the contact controlling means being accomplished either directly or through additional means, thereby opening or closing a circuit to be controlled.

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306+,below for similar devices with thermally responsive means.

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60, Power Plants,   subclasses 632+ for one shot explosion actuated expansible chamber type motors.
92, Expansible Chamber Devices,   appropriate subclasses for an expansible chamber device, per se.
99, Foods and Beverages: Apparatus,   subclass 325 for cooking apparatus with automatic control actuated by an expansible fluid.
200, Electricity: Circuit Makers and Breakers,   subclasses 81+ , for switches in which the operating means is responsive to pressure of a liquid, gas or vapor, the pressure being caused by a confined fluid or fluid flow.
219, Electric Heating,   subclasses 490+ (particularly subclass 496) for electric heating devices with current regulation or current control means which may include pressure responsive devices and subclass 513 for electric heaters with automatic switching means comprising temperature responsive expansible fluid actuated devices.
236, Automatic Temperature and Humidity Regulation,   subclasses 79+ for fluid operated motor means for automatic regulation systems.
307, Electrical Transmission or Interconnection Systems,   subclass 118 for fluid pressure actuated switching systems and subclass 144 for fluid pressure switch actuator, per se.
318, Electricity: Motive Power Systems,   subclass 481 for automatic motor control systems which are responsive to pressure in a fluid.
322, Electricity: Single Generator Systems,   subclass 35 for automatic generator control devices which are responsive to a fluid pressure.
340, Communications: Electrical,   subclass 592 for automatic alarm systems with an expanding fluid sensor.
374, Thermal Measuring and Testing,   subclasses 201+ for expanding fluid type thermometers.
  
[List of Patents for class 337 subclass 115]    115With manual or other mechanical contact actuating means:
 This subclass is indented under subclass 114.  Subject matter including at least one electrothermally responsive device combined with further manual or other mechanical contact actuating means, both said device and means controlling the same contacts. Usually the contacts are directly controlled by the manual or mechanical means which is in turn under the control of the electrothermally responsive device. However, devices in which the contacts may be opened or closed by the separate means independently are also classified here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

37+,for electrothermal bimetallic element switches having manual or mechanical contact controlling means.
126+,for electrothermal, longitudinally expansible element switch with manual or mechanical contact actuating means.
143+,for electrothermal, fusible element switches with manual or mechanical contact control means.
312+,below for similar type devices with thermally responsive actuating means.
334+,for thermal, bimetallic element switches with manual or other mechanical contact control means.
384+,for thermal, longitudinally expansible solid element switch with manual or other mechanical contact control means.
402+,for thermal, fusible, combustible or explosive material actuated switch with manual gravity actuated, or other mechanical contact control means.
  
[List of Patents for class 337 subclass 116]    116Cyclically or periodically operative:
 This subclass is indented under subclass 115.  Subject matter including significant details of means whereby a circuit is intermittently or cyclically opened and closed at constantly recurring intervals under the influence of an electrothermally responsive vaporizable or expansible fluid device.
(1) Note. For other intermittently or cyclically controlled means employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 92.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   subclasses 19.01+ for periodic mechanical switches and subclasses 81+ for fluid pressure responsive switches which may be periodically operated.
219, Electric Heating,   subclass 492 for automatic regulating and control means for electric heaters with timing or cycling means.
236, Automatic Temperature and Humidity Regulation,   subclasses 99+ for thermostatic controls utilizing expanding fluid and which may be periodically operative.
307, Electrical Transmission or Interconnection Systems,   subclass 132 for repetitive make and break switches.
315, Electric Lamp and Discharge Devices: Systems,   subclass 72 for a load device with periodic electric switch.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 87+ for periodically operated electromagnetic switches.
340, Communications: Electrical,   subclasses 468+ for vehicle signal light systems including those with cyclic light flasher switches.
  
[List of Patents for class 337 subclass 117]    117Utilizing diaphragm or bellows means:
 This subclass is indented under subclass 115.  Subject matter including specific details of at least one expansible bellows or diaphragm device whereby a thrust force is transmitted to a contact control means upon a change of state or dimension of the actuating fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

320+,for similar devices utilizing thermally actuated fluid means.

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73, Measuring and Testing,   subclasses 715+ , especially subclass 729, for fluid pressure gauges utilizing diaphragm or bellows structure.
74, Machine Element or Mechanism,   subclass 17.8 for devices for the transfer of motion through a flexible seal or diaphragm and subclasses 18+ for devices where the motion transfer takes place through a moving rod or casing.
91, Motors: Expansible Chamber Type,   appropriate subclasses for expansible chamber motors with diaphragm or bellows.
92, Expansible Chamber Devices,   appropriate subclasses, especially subclasses 34+ for bellows structure.
200, Electricity: Circuit Makers and Breakers,   subclass 83 for fluid pressure actuated switches with diaphragm.
381, Electrical Audio Signal Processing Systems and Devices,   subclasses 355+ for telephone type transmitters with diaphragm and subclasses 176, 186, and 398+ for diaphragm structure, per se.
  
[List of Patents for class 337 subclass 118]    118With restoring or resetting means:
 This subclass is indented under subclass 115.  Subject matter including significant details of means whereby a continuous electrical connection through the switch device may be re‐established either automatically or at the will of an operator, after having been broken through the action of the switch.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56,for electrothermal, bimetallic element switch with mechanical snap action having reclosing or reset means.
72,for electrothermal, bimetallic element switch with latch means having reclosing or reset means.
91,for electrothermal, bimetallic element switch having snap action with reset means.
130,for longitudinally expansible solid element switch having latch or trip with reset means.
155,for electrothermal, fusible element switch with mechanical reclosing or resetting means.
348,for thermal, bimetallic element switch having snap action means with reclosing or reset means.
367,for thermal, bimetallic unitary contact type switch having snap action means with reset means.
  
[List of Patents for class 337 subclass 119]    119Utilizing capillary tube or bore means:
 This subclass is indented under subclass 114.  Subject matter including significant details of a capillary tube or bore at least partially filled by a vaporizable liquid conductor the bore being of such caliber that the liquid is either caused to vaporize at a predetermined current value or to shift its position within the bore thereby disconnecting the contacts of the device. Generally the devices act in a similar manner to a conventional fuse, acting to open a circuit between contacts upon the vaporization of the liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

321,for similar devices utilizing thermally responsive liquid actuating means.

SEE OR SEARCH CLASS:

219, Electric Heating,   subclasses 510+ , especially subclass 511, for automatic thermally responsive fluid actuated switches for electric heaters utilizing capillary tube means.
236, Automatic Temperature and Humidity Regulation,   subclasses 95 and 99+ for thermally responsive expanding fluid actuated temperature regulating systems utilizing capillary tubes.
361, Electricity: Electrical Systems and Devices,   subclasses 161+ for a mercury column type thermostat in an electrical circuit for relays and electromagnets.
  
[List of Patents for class 337 subclass 120]    120With external heating means (external from fluid; may be the container):
 This subclass is indented under subclass 114.  Subject matter including heat concentrating or generating means, such as heating coils or high resistance elements, responsive to the current in a circuit to be controlled, and whereby the change in condition of the contact controlling fluid is brought about.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324,for similar devices utilizing thermally responsive fluid actuating means.

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60, Power Plants,   subclasses 516+ for expansion and contraction power plants with expansible fluid heated by external means.
165, Heat Exchange,   subclasses 200+ , especially subclasses 223+ and 257, for anticipating type thermostatic controls with auxiliary heater.
200, Electricity: Circuit Makers and Breakers,   subclasses 81+ for fluid pressure switch which may have auxiliary heating means.
219, Electric Heating,   subclass 511 for thermally responsive expansible fluid actuated switches for electric heaters and having auxiliary heating means.
236, Automatic Temperature and Humidity Regulation,   subclass 86 for thermostatic expanding operated motor type temperature regulators which may have auxiliary heaters.
361, Electricity: Electrical Systems and Devices,   subclasses 161+ for thermoelectric switch in the control circuit of a relay or electromagnet and having external heater means.
  
[List of Patents for class 337 subclass 121]    121With housing or casing:
 This subclass is indented under subclass 114.  Subject matter including significant structural details of housing, casing, mounting or support means peculiarly adapted for use with the subclass 114 type switch or switches.
(1) Note. For other housings or casings employed in devices of this class, see the subclasses listed, under SEARCH THIS CLASS, SUBCLASS in subclass 20.

SEE OR SEARCH THIS CLASS, SUBCLASS:

327+,for similar devices utilizing thermally responsive fluid actuating means.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   subclasses 293+ for details of casing or bases for mechanical switches.
  
[List of Patents for class 337 subclass 122]    122With contact or electrode structure or material (e.g., carbon):
 This subclass is indented under subclass 114.  Subject matter including significant details of the mechanical structure, or material of construction, of the contact assembly, or its attachment to or support on the thermally responsive switch device.
(1) Note. For other contact structures, or contact composition, employed in devices of this class, see subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 26.

SEE OR SEARCH THIS CLASS, SUBCLASS:

329,for similar contact structure utilized with thermal responsive liquid actuated switches.

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29, Metal Working,   subclasses 874+ for the process of manufacturing of electrical contacts and terminals.
200, Electricity: Circuit Makers and Breakers,   subclasses 238+ for details of contact construction for mechanical switches.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 133+ for contact structure for use in multiple contact switches of the electromagnetic type and subclasses 196+ for contact composition of structure in general for use in electromagnetic switches.
439, Electrical Connectors,   especially subclasses 884+ for a contact of particular configuration.
  
[List of Patents for class 337 subclass 123]    123With longitudinally expansible solid element (e.g., rod, wire strip, etc.):
 This subclass is indented under subclass 14.  Subject matter wherein the electrothermally actuated switching device comprises at least one monometallic longitudinally expansible solid element whose coefficient of expansion along its major axis is utilized to cause the opening or closing of an electrical circuit as a result of the change in dimension of the element. The element may be fixedly secured at both ends, around its circumference or at one end, according to the design of the switch.

SEE OR SEARCH THIS CLASS, SUBCLASS:

382+,below for similar devices utilizing thermally responsive solid elements.

SEE OR SEARCH CLASS:

60, Power Plants,   subclasses 527+ for expansion and contraction type power plants with solid elements.
219, Electric Heating,   subclass 512 for automatic switching arrangements in the circuit of an electric heater and utilizing linearly expansible metal.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclass 141 for electromagnetically operated switches with thermally responsive expandable solid.
374, Thermal Measuring and Testing,   subclasses 187+ for expanding solid thermometers.
  
[List of Patents for class 337 subclass 124]    124With voltage or ambient temperature compensation means:
 This subclass is indented under subclass 123.  Subject matter including means whereby the operational mode of the deformable solid actuating means is controlled or modified by the temperature of the surrounding medium (atmosphere) or the value of the voltage drip across the terminals of the switching device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

99+,for electrothermal, bimetallic actuated switch with voltage or ambient temperature compensation means.
378,for thermal, bimetallic actuated switch with compensation means (e.g., ambient temperature).

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361, Electricity: Electrical Systems and Devices,   subclasses 161+ for electric circuits for relays or electromagnets including thermally actuated longitudinally expansible solid elements.
  
[List of Patents for class 337 subclass 125]    125With electrical shunting or short‐circuiting means:
 This subclass is indented under subclass 123.  Subject matter including a normally open electrical circuit in series across the input and output terminals of the device and adapted when closed to complete an electrical circuit in parallel relationship with the thermal contact actuating means. For instance; the shunting or short circuiting means may comprise a switch arm operative by a relay armature operative when the potential applied across the relay winding exceeds a preselected value. The type of switching devices found here are most commonly used as Flashers.
(1) Note. Where the shunting or short circuiting device is for the purpose of voltage compensation the patent will be placed in subclass 124 above and officially cross referenced in this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

15+,for electrothermal actuated switches with shunt or short circuit completion devices.
221,for electrothermal fusible element switches with electrical shunt circuit means.

SEE OR SEARCH CLASS:

307, Electrical Transmissions or Interconnection Systems,   appropriate subclasses, especially subclasses 117 , 131, 132, and 141.4 for switching systems in which the actuating means may be shunted or short circuited.
315, Electric Lamp and Discharge Devices: Systems,   subclasses 74+ for a combined discharge device load device and an automatic shunt circuit closing means.
  
[List of Patents for class 337 subclass 126]    126With manual or other mechanical contact actuating means:
 This subclass is indented under subclass 123.  Subject matter including at least one electrothermally responsive device, combined with further manual or other mechanical contact actuating means, both said device and means cooperatively acting to control the switch contacts. Usually the contacts are directly controlled by the manual or mechanical means which is in turn under the control of the temperature responsive device. However, devices in which the contacts may be opened or closed by the separate means independently are also classified here.
(1) Note. For other manual or mechanical switch control means employed in devices of this class, see SEARCH THIS CLASS, SUBCLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115,for other manual or mechanical switch control means employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 115.
384,for similar devices utilizing thermally responsive elements.

SEE OR SEARCH CLASS:

200, Electricity: Circuit Makers and Breakers,   subclass 3 for mechanical switches with thermally responsive cut outs or fuses.
219, Electric Heating,   subclass 512 for automatic switches for electric heaters utilizing linearly expansive metal elements combined with mechanical means.
236, Automatic Temperature and Humidity Regulation,   subclasses 101+ for automatic temperature control apparatus comprising an expanding solid element with mechanical contact control means.
307, Electrical Transmission or Interconnection Systems,   subclasses 116+ , especially subclasses 117 and 139+ for switching systems in general utilizing mechanical means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 141+ for electromagnetic switches with combined electrothermal actuating means.
340, Communications: Electrical,   subclasses 584+ for temperature responsive signal systems, particularly subclasses 593+ for a switch sensor therein.
  
[List of Patents for class 337 subclass 127]    127With delayed action or timing means:
 This subclass is indented under subclass 126.  Subject matter including means whereby the opening, or the closing, of the switch contacts takes place at an appreciable interval of time after an actuating force is applied to the contact actuating means or the timing of the contact open or contact closed interval is effected by varying the energizing current applied to the device.
(1) Note. For other delayed action or timing means employed in devices of this class, see SEARCH THIS CLASS, SUBCLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

81,for similar devices utilizing electrothermally responsive bimetallic elements. See (1) Note above. For other delayed action or timing means employed in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS of subclass 81.
163+,for similar devices utilizing fusible elements.
341,for similar devices utilizing thermally responsive bimetallic elements.

SEE OR SEARCH CLASS:

34, Drying and Gas or Vapor Contact With Solids,   subclasses 562+ for drying apparatus with automatic control of the timing cycle.
116, Signals and Indicators,   subclasses 22+ , 101+, and 216+ for periodic mechanical signals and indicators with thermal control means.
165, Heat Exchange,   subclasses 232 ; 238+; 262; 267+ for heat exchange systems with timing or programming means.
200, Electricity: Circuit Makers and Breakers,   subclasses 19.01+ for nonthermal periodic switches and subclasses 33+ for nonthermal time switches and subclasses 33+ for nonthermal time switches.
307, Electrical Transmission or Interconnection Systems,   subclasses 141+ for switch actuators in general with time delay or retardation means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 59+ for electromagnetic switches with time delay means.
340, Communications: Electrical,   subclasses 309.1+ for electric signalling systems with timer control.
361, Electricity: Electrical Systems and Devices,   subclasses 195+ for control circuits for electromagnetic devices with time delay means.
379, Telephonic Communications,   subclasses 111+ and 190+ for telephone type switches or registers with time control.
  
[List of Patents for class 337 subclass 128]    128Latching or tripping means:
 This subclass is indented under subclass 126.  Subject matter including significant details of means whereby the switch contacts may be restrained in an open or closed condition by a latch or detent which may be tripped by the action of the electrothermally responsive expansible device. The contacts are usually held in circuit closing position and tripped to open position when the tripping means is operated.
(1) Note. For other latch or trip means used in devices of this class, see subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 46.

SEE OR SEARCH THIS CLASS, SUBCLASS:

385,for similar devices utilizing thermally responsive elements.

SEE OR SEARCH CLASS:

74, Machine Element or Mechanism,   subclasses 2+ for automatic latch or trip mechanisms and subclasses 527+ for mechanical latching or detent devices in general.
200, Electricity: Circuit Makers and Breakers,   subclasses 411+ , 415, 424+, 470, and 471 for mechanical snap switches with latch and/or trip means, subclass 83 for fluid pressure switches of the diaphragm type with latching means.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   appropriate subclasses; particularly subclasses 21+ , 77, 113, 164, 165, 166, 167+, and 172+ for electromagnetically operated switches with latching or tripping means.
361, Electricity: Electrical Systems and Devices,   subclasses 139+ for control circuits for electromagnetic devices with latch mechanisms.
  
[List of Patents for class 337 subclass 129]    129With adjustment or calibration means:
 This subclass is indented under subclass 128.  Subject matter wherein the latching or trip structure includes significant means whereby the current value necessary to cause the operation of the actuating device, may be regulated, readily adjusted or calibrated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

357,for thermally responsive bimetallic actuated switches with adjusting means.

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335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   appropriate subclasses, particularly subclasses 42 , 45, and 176 for circuit control means of the electromagnetic type adjustable latch or tripping means.
  
[List of Patents for class 337 subclass 130]    130With reset or reclosing means:
 This subclass is indented under subclass 128.  Subject matter including significant details of means whereby after an automatic or manual disconnection of the main switch contacts the contacts are reclosed, or means whereby the latching mechanism is reset to an operative condition in which the contacts will be rigidly held in the normal operating condition of the device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72+,for electrothermal, bimetallic element switch having latch means with reset means.

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200, Electricity: Circuit Makers and Breakers,   subclasses 318+ for mechanical switch devices with specific l