Electric circuit for controlling the heat output of heating resi

Details Electric circuit for controlling the heat output of heating resi Electric circuit for controlling the heat output of heating resi

1994-09-27

1995-08-08

Simone, Timothy F.

Foods and beverages: apparatus

Cooking

Automatic control

99329R, 99332, 99342, 99385, 219464, 219492, 219501, 219521, A47J 3708, H05B 102

Patent

active

054389143

ABSTRACT:
An electric circuit operating on a single-phase power supply system for controlling the heat output of at least two heating resistances which are electrically connected in parallel and are installed in electric household appliances, particularly toasters, wherein the control is being effected in compliance with flicker standards and without feeding interference back into the power supply system. A switch is connected in series with each heating resistance, wherein the switches are activated by an electronic energizing arrangement. During a heating phase, the switches of the circuit are repetitively asymmetrically cycled in such a way that always only one switch is closed and all other switches are open, wherein the switch which is closed at a given time exclusively permits the through-passage of full waves from the power supply system.

REFERENCES:
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patent: 4038520 (1977-07-01), Boller et al.
patent: 4402258 (1983-09-01), Guarnerio
patent: 4878423 (1989-11-01), Birkert et al.
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patent: 5044263 (1991-09-01), Birkert et al.
patent: 5054382 (1991-10-01), Ward et al.
patent: 5088389 (1992-02-01), Labadia del Fresno
patent: 5283421 (1994-02-01), Richards
patent: 5385082 (1995-01-01), Huggler et al.

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