US PATENT SUBCLASS 219 / 483-- .~.~ Controlling or regulating plural separate distinct heating resistance elements(i.e., one control system for all elements)

US PATENT SUBCLASS 219 / 483
.~.~ Controlling or regulating plural separate distinct heating resistance elements(i.e., one control system for all elements)

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}
483		.~.~ Controlling or regulating plural separate distinct heating resistance elements(i.e., one control system for all elements) {3}
484	DF	.~.~.~> Of diverse resistance characteristics or value
485	DF	.~.~.~> With total current or power limiting means
486	DF	.~.~.~> Selectively, sequentially or alternately {1}

DEFINITION

Classification: 219/483

(under subclass 482) Subject matter including means whereby a plurality of separate and distinct resistance heating units or elements, within or forming a subcombination of a single heating device, may be activated either as a unit or selectively, or whereby the current applied to each selectively or to the whole may be regulated between predetermined values or for predetermined intervals of time.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

11+, for systems of electrical supply to plural loads, especially subclasses 31+ and 38+ for control of current or power and for selectively connected or controlled loads, respectively.