Illumination – Illuminated scale or dial – Edge illuminated modifier or light rod/pipe
Patent
1989-12-27
1990-12-11
Husar, Stephen F.
Illumination
Illuminated scale or dial
Edge illuminated modifier or light rod/pipe
362 31, 362236, 362800, G01D 1128
Patent
active
049774867
ABSTRACT:
An illuminating device including a first light source, a second light source and light guiding means, all provided behind an indicating panel having a first indicating area and a second indicating area formed adjacent to each other. The first light source is located at a position opposed to the first indicating area for illuminating the first indicating area. The second light source is so located as to illuminate the second indicating area through the light guiding means. The light guiding means is constructed of a transparent plate-like light guiding member for guiding light from the second light source to the second indicating area. The light guiding member is interposed between the indicating panel and the first light source. The light guiding member is capable of transmitting light from the first light source across a thickness of the light guiding member.
REFERENCES:
patent: 2953668 (1960-09-01), Bassett, Jr.
patent: 3264769 (1966-08-01), Hardesty
patent: 4511760 (1985-04-01), Garwin
patent: 4777480 (1988-10-01), Okamoto et al.
Alps Electric Co. ,Ltd.
Husar Stephen F.
Shoup Guy W.
Winters Paul J.
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