US PATENT SUBCLASS 219 / 493
.~.~.~.~ Electromechanical

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}
492  DF  .~.~.~ Comprising timing or cycling means {1}
493.~.~.~.~ Electromechanical

DEFINITION

Classification: 219/493

(under subclass 492) Subject matter wherein the timing or cycling structure comprises electro-mechanical means.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

90, for the structure of periodically operated electromagnetic switches.

307, Electrical Transmission or Interconnection Systems,

97, for intermittent regulatory interruption of a system in response to a condition and subclass 132 for repetitive make and break switching systems.

323, Electricity: Power Supply or Regulation Systems, 201, 204 for control systems utilizing dynamoelectric machines.