Switch knob having illuminated indicator

Details Switch knob having illuminated indicator Switch knob having illuminated indicator

1997-03-27

1999-02-02

Coggins, Wynn Wood

Electricity: circuit makers and breakers

Electric switch details

Indicators

200 5A, 200557, H01H 926, H01H 900, H01H 2124

Patent

active

058653023

ABSTRACT:
A switch knob 1 having an operation portion 2, a cam system 3, a driving system 4, a steel ball 5, and a spring 6. The cam system 3, which is made of a molded, light transmissive material, is insertion molded into the operation portion 2, which is made of an opaque material. The cam system 3 includes an integral indicator 31 having a projected portion 32. A designated symbol is formed by the projected portion 32, which is exposed through the operation portion 2. Since the cam system 3 attached on the back side of the operation portion is light transmissive, the cam system 3 does not cause any inconsistency in the light at the indication portion. In addition, the number of parts comprising the switch knob 1 are minimized, and it is possible to maintain the quality of the symbols for extended periods.

REFERENCES:
patent: 3482542 (1969-12-01), Mace
patent: 3567893 (1971-03-01), Ernst
patent: 4771725 (1988-09-01), Miyaguchi
patent: 5095409 (1992-03-01), Dematteo et al.
patent: 5403984 (1995-04-01), Ogawa
patent: 5647478 (1997-07-01), Hirai

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