Lighting circuit control apparatus

Electric lamp and discharge devices: systems – Plural load device systems – Sequential starting

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Details

315308, 315360, H05B 3700

Patent

active

045008140

ABSTRACT:
A light circuit control apparatus for controlling the illumination of a predetermined area is described comprising a photocell coupled to a first comparator circuit for generating a "light-on" signal when the ambient light in the predetermined area decreases to a first predetermined intensity and a second comparator for generating a "light-off" signal when the ambient light in the predetermined area increases to a predetermined intensity, and logic circuits including flip-flops for turning on and turning off a plurality of lighting circuits in a predetermined sequence in response to the "light-on" and "light-off" signals generated by the comparator.

REFERENCES:
patent: 3895265 (1975-07-01), Watrous
patent: 4225808 (1980-09-01), Saraceni
patent: 4277727 (1981-07-01), LeVert
patent: 4368408 (1983-01-01), Marcus

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