Illumination – Illuminated scale or dial – Edge illuminated modifier or light rod/pipe
Patent
1984-07-06
1986-11-25
Feinberg, Craig R.
Illumination
Illuminated scale or dial
Edge illuminated modifier or light rod/pipe
362 30, 362 32, 362328, 362346, 362355, G01D 1128, F21V 704
Patent
active
046252622
ABSTRACT:
A pointer illuminating structure in a measuring instrument. A pointer of the measuring instrument is of a generally elongated structure and transparent. At an intermediate portion thereof, a light section is provided to extend substantially prependicularly to the generally elongated structure to form a T shape. The pointer has a flat upper surface and lower surfaces extending from about both side of the light inducing section. A reflective material is applied to the lower surfaces. Beneath the upper surface and above levels of the lower surface, cavities laterally extend to open sideways. Said cavities are defined by reflective surfaces. In alternative form, said elongated pointer is formed with a truncated conical portion at the light inducing section. Said truncated conical portion has a truncated conical reflective surface. The reflective material is applied to the side surfaces instead of the lower surface thereof.
REFERENCES:
patent: 2290278 (1942-07-01), Failla
patent: 2831453 (1958-04-01), Hardesty
patent: 4195907 (1980-04-01), Zamja et al.
patent: 4218726 (1980-08-01), Fukasawa et al.
patent: 4380043 (1983-04-01), Takamatsu et al.
Majima Kunio
Sakakibara Yutaka
Ueda Hidetaka
Feinberg Craig R.
Yazaki -Corporation
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