Power control circuit with phase controlled signal input

Details Power control circuit with phase controlled signal input Power control circuit with phase controlled signal input

1987-04-21

1989-01-10

Boudreau, Leo H.

Electric lamp and discharge devices: systems

Regulation of the control current and/or potential applied...

315199, 315DIG4, 315DIG7, 315294, 315299, 315225, 315226, H05B 4129

Patent

active

047975997

ABSTRACT:
One or more power dimmers have a preshaped phase controlled input signal connected to their control input. The preshaped phase controlled input signal is generated from the output of a master dimmer having conventional phase control circuits operated from a manual or other control. A relay having contacts in the output circuit of the power dimmers is opened in response to the reduction of the phase controlled input signal to a value less than a given value. In an alternative embodiment, the power dimmers are replaced by an interface circuit which produces a variable frequency, pulse width modulated or other signal.

REFERENCES:
patent: 3697821 (1972-10-01), Johnson
patent: 3715623 (1973-02-01), Szabo
patent: 3816794 (1974-06-01), Snyder
patent: 3894265 (1975-07-01), Holmes et al.
patent: 4207498 (1980-06-01), Spira et al.
patent: 4225808 (1980-09-01), Saraceni
patent: 4334171 (1982-06-01), Parman et al.
patent: 4478468 (1984-10-01), Schoen et al.
patent: 4520295 (1985-05-01), Bolhuis

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