Self-illuminating coaxial knob

Details Self-illuminating coaxial knob Self-illuminating coaxial knob

1991-04-01

1992-03-03

Lazarus, Ira S.

Illumination

Illuminated scale or dial

Internal light source

362 86, 362 26, 362 30, 362 31, 116202, G01D 1128, E05B 100

Patent

active

050937642

ABSTRACT:
A self-illuminating coaxial knob provided on an operating panel of an air conditioning apparatus, an acoustic apparatus or the like, in which an outer knob and an inner knob connected to an outer shaft and an inner shaft, respectively, are coaxially provided on a panel surface, the panel being provided with a graduation, and the knobs being provided with indexes, respectively. The outer knob is illuminated from the back by a panel surface illuminating portion circularly provided on a panel surface light guide, whereas the inner knob is illuminated by a ring-like inner knob light guide provided in a ring-like incoming portion.

REFERENCES:
patent: 1566069 (1925-12-01), Buchholz et al.
patent: 1708092 (1929-04-01), Heller
patent: 2130367 (1938-09-01), Rylsky et al.
patent: 2648305 (1953-08-01), Appleman
patent: 2693165 (1954-11-01), Appleman
patent: 2763231 (1956-09-01), Neugass
patent: 4998318 (1991-03-01), Nohtomi et al.
patent: 5807091 (1989-02-01), Obata

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