Bright meter

Details Bright meter Bright meter

1988-05-27

1989-10-03

Lazarus, Ira S.

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 30, 116288, 116DIG6, 177177, G01D 1128

Patent

active

048720933

ABSTRACT:
To improve bright needle recognizability on a dial for a bright meter, a needle made of a light transmissible material and brightened by a light source comprises a lower light reflecting layer formed at a lower surface of the needle; a first side light reflecting layer formed on a first side surface of the needle; and an upper semitransparent layer for brightening an upper surface of the needle. Therefore, when the needle is brightened, light is transmitted from a second side surface opposing the first side surface of the needle obliquely onto the dial to illuminate the lower indication display area side from the needle on the dial, for instance.

REFERENCES:
patent: 2831453 (1958-04-01), Hardesty
patent: 2902970 (1959-09-01), Kadlec
patent: 4163428 (1979-08-01), Ishikawa
patent: 4218726 (1980-08-01), Fukasawa et al.
patent: 4258643 (1981-03-01), Ishikawa et al.
patent: 4274358 (1981-06-01), Nakamura et al.
patent: 4300470 (1981-11-01), Furukawa
patent: 4380043 (1983-04-01), Takamatsu et al.
patent: 4625262 (1986-11-01), Sakakibau et al.

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