US PATENT SUBCLASS 337 / 320
.~.~ With diaphragm or bellows structure

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

298  DF  THERMALLY ACTUATED SWITCHES {7}
306  DF  .~ Expansible or vaporizable fluid actuated {12}
320.~.~ With diaphragm or bellows structure {1}
321  DF  .~.~.~> Combined with capillary tube or bore

DEFINITION

Classification: 337/320

(under subclass 306) Subject matter wherein the thermally responsive element is specifically recited as comprising a pressure responsive diaphragm or bellows structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

117, for similar subject matter in an electrothermally actuated switch.

SEE OR SEARCH CLASS

62, Refrigeration, appropriate subclasses, especially

5, 7, and 235.1 for refrigerator controls utilizing diaphragm or bellows type expansible liquid means.

200, Electricity: Circuit Makers and Breakers, especially 83, for diaphragm controlled fluid pressure switches.

236, Automatic Temperature and Humidity Regulation, appropriate subclasses especially

9, 20, 49.1, 68, and 75 for automatic temperature control apparatus utilizing similar subject matter.

310, Electrical Generator or Motor Structure,

68, for electric motor structure for expansible fluid overload switches.

340, Communications: Electrical,

592, for automatic alarms with fluid pressure sensors utilizing a diaphragm or bellows.

374, Thermal Measuring and Testing,

203, for bellows type expanding fluid thermometers.