US PATENT SUBCLASS 337 / 306
.~ Expansible or vaporizable fluid actuated

Current as of: June, 1999
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337 /   HD   ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES

298  DF  THERMALLY ACTUATED SWITCHES {7}
306.~ Expansible or vaporizable fluid actuated {12}
307  DF  .~.~> Plural expansible elements with single switch {1}
309  DF  .~.~> Multiple contacts or external circuit completion means {2}
312  DF  .~.~> With manual or other mechanical contact control means {4}
320  DF  .~.~> With diaphragm or bellows structure {1}
322  DF  .~.~> With Bourdon tube
323  DF  .~.~> With operating range calibration or adjustment means
324  DF  .~.~> With auxiliary heater
325  DF  .~.~> With latching, locking or holding means
326  DF  .~.~> Fluid or fluid pressure generating means
327  DF  .~.~> Housing, casing or support means {1}
329  DF  .~.~> Contact structure or composition of material {2}
332  DF  .~.~> With signaling, alarm or visual indicator means

DEFINITION

Classification: 337/306

(under subclass 298) Subject matter wherein the circuit controlling means comprises a device utilizing an expansible or vaporizable fluid whereby the change of volume or the pressure generated thereby transmits an actuating force to a movable contact or contacts.

(1) Note. For devices in which an expansible liquid in a container, the container acting to complete a circuit or to prevent the completion of a circuit, as by propping the contacts open, is caused to explode the container to control the circuit, search will be in this class in subclass 416 even though the device is not in fact explosive or combustible as defined in that subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

114+, for similar subject matter in an electrothermally actuated switch.

SEE OR SEARCH CLASS

60, Power Plants,

516+, for power plants utilizing expansible or vaporizable fluid. 73, Measuring and Testing,

700+, for fluid pressure gauges with motion transmitting means actuated by expansible fluids.

219, Electric Heating,

513, for automatically operative switches for electric heaters utilizing thermally responsive expansible liquid.

236, Automatic Temperature and Humidity Regulation,

4, 18, 32, 42, 56+, 64+, 86, and 99 for automatic temperature regulating devices utilizing thermally expansive fluid.

307, Electrical Transmission or Interconnection Systems,

118, for switching systems responsive to pressure in a fluid and subclass 144 for fluid pressure actuator, per se.

340, Communications: Electrical,

592, for automatic alarms with fluid pressure sensitive thermo-mechanical sensing means.

374, Thermal Measuring and Testing, 201+, for a thermometer utilizing an expanding fluid.