Lamp control circuit using heater/thermistor time delay

Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Electric switch controlled by the radiant energy responsive...

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Details

250214AL, 307141, 315156, 315360, 361198, H05B 3904, H01J 3912

Patent

active

042075017

ABSTRACT:
A lamp control circuit having a heater and thermistor coupled between the illumination sensitive device and the control electrode of an SCR or triac for providing a time delay between the detection of a change in illumination and the switching of the SCR or triac.

REFERENCES:
patent: 3392284 (1968-07-01), Cain
patent: 3418480 (1968-12-01), Miller
patent: 3898516 (1975-08-01), Nakasone

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