US PATENT SUBCLASS 219 / 494
.~.~.~ Thermally responsive

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

200  DF  HEATING DEVICES {14}
482  DF  .~ With power supply and voltage or current regulation or current control means {4}
490  DF  .~.~ Automatic regulating or control means {11}
494.~.~.~ Thermally responsive {1}
495  DF  .~.~.~.~> Thermomagnetic

DEFINITION

Classification: 219/494

(under subclass 490) Subject matter including at least one means which is responsive to the temperature of the heated material, the heating element itself, or the surrounding atmosphere, by means of which the amount of current traversing the heating element or elements is controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

110, for resistance type metal welding control systems responsive to temperature.

241, for heated tip hand tools with thermal control means.

251+, for electric flatiron type heaters with thermally controlled current supply.

328+, for liquid heaters with thermally controlled current supply. 413, for ovens with current supply responsive to condition of heating area.

449+, for planar surface heaters with thermally controlled current supply.

505, for regulators utilizing nonlinear or negative temperature coefficient resistance means.

510+, for heaters in general with thermally controlled switching means.

SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus,

328, 329 and 333 for automatic control means for cooking devices employing thermal responsive means.

165, Heat Exchange,

281+, ; 287+ for heat exchange systems with temperature responsive automatic control devices.

323, Electricity: Power Supply or Regulation Systems.