US PATENT SUBCLASS 219 / 503
.~.~.~ Inductive reactor means (e.g., auto transformer)

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}
503.~.~.~ Inductive reactor means (e.g., auto transformer)

DEFINITION

Classification: 219/503

(under subclass 490) Subject matter including apparatus whereby the power supply for, or the voltage or current

applied to a heating device is controlled through the action of inductive reactance of an inductive reactor means (e.g., saturable reactor).

SEE OR SEARCH THIS CLASS, SUBCLASS:

112+, for resistance welder current supply systems with stored energy discharge means, (e.g., inductor).

116, for resistance welder current supply systems with transformer.

495, for heaters in general with thermomagnetic means to automatically regulate the power, voltage or current in response to temperature.

514, for heaters in general with thermally controlled solenoid in the current supply switching circuit. 519, for heaters in general with automatically controlled electromagnetic relay means.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

401+, for nonlinear (saturable) reactor systems.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

209+, for work magnet and electromagnetic structure, per se.

336, Inductor Devices, appropriate subclasses for the structure self and/or mutual inductive devices in general.

361, Electricity: Electrical Systems and Devices,

139+, for control circuits for electromagnetic devices.