Heater control system

Details Heater control system Heater control system

1990-09-18

1992-01-07

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219492, 219505, 219216, 323901, 323235, H05B 102

Patent

active

050794094

ABSTRACT:
A heater control system has a phase control circuit coupled between a power supply and a heater to control the phase of current to be supplied to the heater. A short circuit device is connected to short circuit the phase control circuit to allow current from the power supply to flow directly to the heater. A control circuit allows the phase control circuit to operate for a predetermined time after the power supply is turned on, and after the elapse of this predetermined time, shorts the phase control circuit with the short circuit device. In a modification, the phase control circuit may be normally inactive, and be energized to reduce current to the heater when the power supply is being drained by another device.

REFERENCES:
patent: 3621373 (1971-11-01), Mitchell
patent: 3959714 (1976-05-01), Mihelich
patent: 4256951 (1981-03-01), Payne et al.
patent: 4307440 (1981-12-01), Inoue
patent: 4461990 (1984-07-01), Bloomer

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