Photoelectric control device which detects changes in light inte

Details Photoelectric control device which detects changes in light inte Photoelectric control device which detects changes in light inte

1985-07-25

1987-04-14

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214AL, 307311, 315158, H05B 3702, H05B 3904, H05B 4136

Patent

active

046581294

ABSTRACT:
A photoelectric control device having a photoelectric sensing unit for delivering an output voltage in response to changes of the intensity of light, the output voltage being applied to a capacitor for operating a SCR. When the output voltage reaches a predetermined level the SCR is caused to become conductive or non-conductive. The SCR is connected to a bridge rectifier which causes a triac to become conductive or non-conductive when the SCR becomes conductive or non-conductive, so as to allow electric power to be supplied to a load or to be cut off in response to changes in the intensity of light.

REFERENCES:
patent: 3176189 (1965-03-01), Tabet
patent: 3529214 (1970-09-01), Corn

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