US PATENT SUBCLASS 219 / 661
.~.~ Power switching

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

600  DF  INDUCTIVE HEATING {7}
660  DF  .~ With power supply system {3}
661.~.~ Power switching {4}
662  DF  .~.~.~> Plural load inductors
663  DF  .~.~.~> Condition responsive {2}
668  DF  .~.~.~> With protection
669  DF  .~.~.~> Polyphase

DEFINITION

Classification: 219/661

Power switching:

(under subclass 660) Subject matter wherein a device controls the on and off periods of energy being supplied from the power supply to the inductive heating apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:

715, for a microwave heating device with power switching.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

112+, for switching systems.