US PATENT SUBCLASS 219 / 482
.~ With power supply and voltage or current regulation or current control means

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

200  DF  HEATING DEVICES {14}
482.~ With power supply and voltage or current regulation or current control means {4}
483  DF  .~.~> Controlling or regulating plural separate distinct heating resistance elements(i.e., one control system for all elements) {3}
488  DF  .~.~> With voltage limitation, conversion, or adapting means
489  DF  .~.~> Combined manual and automatic regulating or control means
490  DF  .~.~> Automatic regulating or control means {11}

DEFINITION

Classification: 219/482

(under subclass 200) Devices combined with an external source of power or current and wherein the significantly recited subject matter includes structure whereby the heating current applied to the heating device or devices from the external source is controlled or regulated as to level or amplitude, length of time applied, sequence of time applied, voltage level at which applied or in proper phase.

SEE OR SEARCH THIS CLASS, SUBCLASS:

108+, 130.1+, 240+, 250+, 262+, 272, 327, 358, 379, 419, 448+, and 650, for other voltage or current regulation or control means applied to special heating devices under the class definition.

SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus,

325+, for electric cooking devices with automatic control means. 165, Heat Exchange,

200+, for automatic control systems combined with heating and cooling systems.

237, Heating Systems,

2+, for automatic control devices for heating systems.

307, Electrical Transmission or Interconnection Systems, appropriate subclasses, especially

17, for transformer connections, 31+ for plural load circuits with control or current or power, 52+ for plural supply circuits or sources with load current control, 64+ for emergency or stand-by source and 149+ for miscellaneous systems.

310, Electrical Generator or Motor Structure, appropriate subclasses for the structure of electrical generators.

322, Electricity: Single Generator Systems, appropriate subclasses for dynamoelectric or nonmagnetic single generator systems.

323, Electricity: Power Supply or Regulation Systems, appropriate subclasses for current, voltage or phase control systems in general.

338, Electrical Resistors,

68+, for electrical resistors, per se, with mechanical means for varying the resistance value.

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

363, Electric Power Conversion Systems, appropriate subclasses for current, phase or frequency conversion systems.

429, Chemistry: Electrical Current Producing Apparatus, Product, and Process, appropriate subclasses for battery construction.