Illuminated switch apparatus

Details Illuminated switch apparatus Illuminated switch apparatus

1998-03-11

1999-06-22

Gellner, Michael L.

Electricity: circuit makers and breakers

Electric switch details

Indicators

362 29, H01H 900

Patent

active

059134143

ABSTRACT:
An apparatus (10) comprises a manually rotatable knob (14) and a source (18) of light. The knob (14) has an axis (15) of rotation, and has a discrete light-transmitting portion (40) which is spaced from the axis (15). A hollow part (36) of the knob (14) defines a chamber (39) extending from the axis (15) to the light-transmitting portion (40). A rotor (22) extends along the axis (15) from the chamber (39) to the source (18) of light. The rotor (22) is formed of material which is translucent sufficiently to transmit light from the source (18) to the chamber (39) to flood the chamber (39) with light, and thereby to illuminate the light-transmitting portion (40) of the knob (14).

REFERENCES:
patent: 2449213 (1948-09-01), Fredrick
patent: 2693165 (1954-11-01), Appleman
patent: 4104981 (1978-08-01), Ono et al.
patent: 4176265 (1979-11-01), Mobus et al.
patent: 4264799 (1981-04-01), Aspden
patent: 5180050 (1993-01-01), Rada et al.
patent: 5204502 (1993-04-01), Ferris et al.
patent: 5359165 (1994-10-01), Leveque et al.
patent: 5434756 (1995-07-01), Hsu et al.
"Refraction" and Refractive Index, Van Norstrand's Scientific Encyclopedia Sixth Edition, pp. 2421-2422, 1983.

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