Meter dial illuminating device

Details Meter dial illuminating device Meter dial illuminating device

1987-02-13

1988-09-13

Myhre, Charles J.

Illumination

Illuminated scale or dial

Internal light source

G01D 1128

Patent

active

047713682

ABSTRACT:
A meter dial illuminating device for illuminating a dial by means of a light incident upon a back surface thereof. The dial is formed of a light transmitting material except at a portion where characters and a scale are indicated. As a result, the front surface of the dial is illuminated by the light incident upon the back surface of the light guiding plate and transmitted therethrough.

REFERENCES:
patent: 1743401 (1930-01-01), Schlaich
patent: 3214577 (1965-10-01), Protzmann
patent: 4044708 (1977-08-01), Klein
patent: 4233927 (1980-11-01), Oikawa et al.
patent: 4258643 (1981-03-01), Ishikawa et al.
patent: 4559582 (1985-12-01), Scardilli et al.
patent: 4625262 (1986-11-01), Sakakibara et al.

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