Illuminated membrane switch

Details Illuminated membrane switch Illuminated membrane switch

1984-05-16

1985-11-05

Marcus, Stephen

Electricity: circuit makers and breakers

Electric switch details

Indicators

200310, H01H 918

Patent

active

045515980

ABSTRACT:
An illuminated membrane switch assembly lighted by internal bulb units. A membrane switch sub-assembly is finger touch actuated by a small translucent plastic button with a graphic overlay on its forward surface and a light-diffusing textured rear surface. A clear plastic backplate is provided for the membrane switch sub-assembly, and in one embodiment light is transmitted to the button directly through a complex partly opaque conductor area in the membrane switch by a single bulb unit mounted in the rear of an enclosing housing that has a white interior surface, and in another embodiment light is transmitted to the button through the switch conductive area by a bulb mounted inside the transparent backplate.

REFERENCES:
patent: 4163883 (1979-08-01), Boulanger
patent: 4177501 (1979-12-01), Karlin
patent: 4197439 (1980-04-01), Mecklenberg et al.
patent: 4247797 (1981-01-01), Swatten
patent: 4288672 (1981-09-01), Puccini
patent: 4343975 (1982-08-01), Sado
patent: 4349705 (1982-09-01), Kuhfus
patent: 4493958 (1985-01-01), Hamilton

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