Heating element operating unit and method

Details Heating element operating unit and method Heating element operating unit and method

1987-06-23

1989-02-28

Hix, L. T.

Electricity: electrical systems and devices

Igniting systems

For incandescent ignition

323322, 323319, F23Q 700

Patent

active

048091286

ABSTRACT:
The combination of a heating element and a control unit therefor and methods of making and of operating the same are provided, the heating element normally being adapted to be operated by the continuous full-wave pulses of a certain high voltage alternating current source for a predetermined time period so as to provide a desired function thereof and the control unit being operatively interconnected to the heating element and having a first arrangement for operatively interconnecting the heating element to that certain high voltage alternating current source for the predetermined time period so as to provide a desired function thereof, the control unit having a second arrangement for operating the heating element with a certain repeating pattern of skipped complete half-wave pulses of another source of high voltage alternating current for the predetermined time period when that other source has a higher voltage than the certain source so that the heating element will not be adversely affected by the other source of higher voltage and will still provide the desired function thereof.

REFERENCES:
patent: 4287468 (1981-09-01), Sherman
A. E. Whittaker, "AC Power Control by Delta/Sigma Converter", Electronic Engineering, vol. 50, No. 611, Sep. 1978, p. 23.
Copending patent application Ser. No. 887,860, filed Jul. 18, 1986.

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