Infrared radiation controlled switch with a visible light detect

Details Infrared radiation controlled switch with a visible light detect Infrared radiation controlled switch with a visible light detect

1985-02-15

1987-05-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250214AL, 340567, G01V 904

Patent

active

046635211

ABSTRACT:
An electric switch has an infrared radiation detector and a visible light detector. The switch is activated when both a change in the detected infrared radiation is sensed and the sensed visible light has a given relationship to a predetermined intensity level. An adjustment of the predetermined level is provided whereby the switch is activated when the level is set to the visible light intensity at the time the adjustment is made.

REFERENCES:
patent: 3703718 (1972-11-01), Berman
patent: 3745550 (1973-07-01), Anthony et al.
patent: 3901813 (1975-08-01), Potopinski
patent: 3958118 (1976-05-01), Schwarz
patent: 4042853 (1977-08-01), Duve
patent: 4179691 (1979-12-01), Keller
patent: 4342987 (1982-08-01), Rossin
patent: 4344071 (1982-08-01), Allen
patent: 4346427 (1982-08-01), Blissett et al.
patent: 4364030 (1982-12-01), Rossin
patent: 4377808 (1983-03-01), Kao

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