US PATENT SUBCLASS 219 / 253
.~.~.~.~.~ Comprising fusible metal, expansible liquid, or bar means

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

200  DF  HEATING DEVICES {14}
243  DF  .~ Combined with pressure application means {2}
245  DF  .~.~ Sole plate-type pressure application means (e.g., flatiron) {8}
250  DF  .~.~.~ With power supply, voltage or current-control means {1}
251  DF  .~.~.~.~ Thermally responsive {2}
253.~.~.~.~.~ Comprising fusible metal, expansible liquid, or bar means

DEFINITION

Classification: 219/253

(under subclass 251) Subject matter wherein the thermal responsive means comprises a fusible solid, an expansible liquid, or expansible bar.

SEE OR SEARCH THIS CLASS, SUBCLASS:

512, for current connection and/or disconnection means for electric heaters which have thermally responsive linear expansible metal operators for the connection and/or disconnection means.

513, for current connection and/or disconnection means for electric heaters which have a thermally responsive expansible fluid operator for the connection and/or disconnection means.

517, for current connection and/or disconnection means for electric heaters which are thermally responsive fusible links.

SEE OR SEARCH CLASS

236, Automatic Temperature and Humidity Regulation, 99+, and 101+ for thermally responsive solid or fluid elements which act as operators to perform some regulatory act.

337, Electricity: Electrothermally or Thermally Actuated

Switches, appropriate subclasses for electrothermally or thermally actuated switches with actuating means comprising an expansible, liquid or bar or a fusible, combustible or explosive means.

374, Thermal Measuring and Testing,

106, and 160 for measuring the temperature by means of fusible elements, subclasses 187+ for expanding solid type elements responsive to heat for measuring quantitatively the temperature, and subclasses 201+ for devices which measure the temperature as a function of the contraction or expansion of a confined fluid.