Switch position detector and indicator with multicolor light emi

Details Switch position detector and indicator with multicolor light emi Switch position detector and indicator with multicolor light emi

1986-06-13

1987-09-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250226, 340782, G01D 534, H01J 156

Patent

active

046926127

ABSTRACT:
A switching device includes a contact movable between two positions, to selectively open and close an electrical path, and a multicolor light emitting diode for indicating different positions of the contact by respectively different colors. The multicolor light emitting diode directs a light beam which is reflected from the contact in accordance with its position on one of two light sensors. The color of the light beam is controlled in accordance with the outputs of the light sensors.

REFERENCES:
patent: 3070677 (1962-01-01), Lowry
patent: 3758785 (1973-04-01), Maute
patent: 3875456 (1975-09-01), Kano
patent: 4420711 (1983-12-01), Takahashi et al.
patent: 4617461 (1986-10-01), Subbarao et al.

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