Optical switching device

Details Optical switching device Optical switching device

1976-04-01

1977-09-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250229, 250239, 340365P, G01D 2104

Patent

active

040499642

ABSTRACT:
A novel electro-optical switch is shown comprising a fixedly mounted lamp, a solid state photo-responsive transistor mounted in position to receive light from the lamp for responsively switching from one state to a second state and actuation means intermediate the transistor and the lamp for obstructing the light path between the lamp and the transistor.

REFERENCES:
patent: 2168886 (1939-08-01), Roberts
patent: 3603982 (1971-09-01), Patti
patent: 3648050 (1972-03-01), Koo
patent: 3767022 (1973-10-01), Olson
patent: 3856127 (1974-12-01), Halfon et al.

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