US PATENT SUBCLASS 219 / 513
.~.~.~.~ Comprising expansible fluid (e.g., alcohol or mercury)

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
507  DF  .~ With current connection and/or disconnection means (e.g., switch) {2}
509  DF  .~.~ Automatically operated {3}
510  DF  .~.~.~ Thermally responsive {7}
513.~.~.~.~ Comprising expansible fluid (e.g., alcohol or mercury)

DEFINITION

Classification: 219/513

(under subclass 510) Subject matter wherein the particular thermally responsive current connection or disconnection structure comprises expansible fluid whereby the expansion or contraction of the fluid initiates or controls a switching action.

SEE OR SEARCH THIS CLASS, SUBCLASS:

253, for electric flatiron type device with current control responsive to thermally expansible liquid means.

SEE OR SEARCH CLASS

73, Measuring and Testing,

368+, for expanding fluid type thermometers. 236, Automatic Temperature and Humidity Regulation,

95, for flue attached thermostats which are of the expanding fluid type and subclasses 99+ for other expanding liquid type.

337, Electricity: Electrothermally or Thermally Actuated Switches,

114+, and 306+ for switches utilizing a heat expansible fluid.