Electrical switch having actuator light transmissive region, int

Details Electrical switch having actuator light transmissive region, int Electrical switch having actuator light transmissive region, int

1976-01-29

1978-01-31

Scott, James R.

Electricity: circuit makers and breakers

Electric switch details

Indicators

116DIG28, 116124L, 200313, 200314, H01H 916, G09F 900

Patent

active

040717267

ABSTRACT:
An electrical switch has an operating member movable between two positions and includes a light transmissive region in the operating member. The region is illuminated by a light source acting through a lens. Movement of the operating member between the two positions changes the relative position of the lens and the light source such that the area and intensity of the light on the light transmissive portion is varied in said two positions. This variation provides a visible indication of the operative position of the switch.

REFERENCES:
patent: 3144643 (1964-08-01), Andersson
patent: 3169506 (1965-02-01), Morris
patent: 3305677 (1967-02-01), Bov
patent: 3372260 (1968-03-01), Bell
patent: 3610860 (1971-10-01), Baldwin
patent: 3780248 (1973-12-01), Martin
patent: 3845736 (1974-11-01), Golbeck et al.
patent: 3895204 (1975-07-01), Lewis
The Way Things Work, "Lenses", Simon & Schuster, 1967, pp. 136, 137; vol. 1.

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