Transparent instrument cover and instrument incorporating same

Details Transparent instrument cover and instrument incorporating same Transparent instrument cover and instrument incorporating same

1977-07-18

1980-01-01

Braun, Fred L.

Illumination

Illuminated scale or dial

Internal light source

362 23, 362 62, 362 84, G01D 1128, F21V 916

Patent

active

041819250

ABSTRACT:
A transparent instrument cover provided with an electroluminescent area arranged so that when energized, light is projected from one surface of the cover to illuminate a dial of an instrument on which it is fitted. The cover is intended as a replacement for an existing transparent cover or coverglass in an instrument. In a first embodiment the electroluminescent area is an annular area located adjacent the periphery of the cover, and in a second embodiment an isolated electroluminescent area is located within the annular area.

REFERENCES:
patent: 2908806 (1959-10-01), Cohen
patent: 3027668 (1962-04-01), Hardesty
patent: 3069509 (1962-12-01), Sherron

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