Keyboard assembly with lighting

Details Keyboard assembly with lighting Keyboard assembly with lighting

1984-10-19

1987-06-02

Marcus, Stephen

Electricity: circuit makers and breakers

Electric switch details

Indicators

200DIG47, 200313, 362 24, H01H 918

Patent

active

046706330

ABSTRACT:
A keyboard capable of efficiently illuminating push buttons with a small number of light sources, wherein light sources are randomly distributed below a grating-like retainer provided for retaining push buttons of the keyboard and light rays from the light sources are reflected by means of pyramidal reflectors disposed above the light sources so as to illuminate a plurality of push buttons sideways and thereby efficiently illuminate a push button with light rays from light sources positioned along a plurality of directions.

REFERENCES:
patent: 2711711 (1955-06-01), Harman
patent: 3144643 (1965-08-01), Anderson
patent: 3755661 (1973-08-01), Bouvrande
patent: 4088855 (1978-05-01), Emery
patent: 4124879 (1978-11-01), Schoemer
patent: 4177501 (1979-12-01), Karlin
patent: 4288672 (1981-09-01), Puccini
patent: 4349705 (1982-09-01), Kuhfus
patent: 4439646 (1984-03-01), Bouvrande
patent: 4449024 (1984-05-01), Stracener
patent: 4493958 (1985-01-01), Hamilton et al.

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