US PATENT SUBCLASS 219 / 519
.~.~.~ Including electromagnetic relay means

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}
519.~.~.~ Including electromagnetic relay means

DEFINITION

Classification: 219/519

(under subclass 509) Subject matter wherein the automatically operated current connection or disconnection structure includes electromagnetic relay means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

514, for heaters with thermally controlled solenoid means in the switching circuit.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

87+, for the structure of electromagnetic switches.

361, Electricity: Electrical Systems and Devices, 139+, for control circuits for relays and electromagnets.