Electricity: circuit makers and breakers – Electric switch details – Indicators
Patent
1981-02-23
1983-01-25
Little, Willis
Electricity: circuit makers and breakers
Electric switch details
Indicators
200333, H01H 312
Patent
active
043705324
ABSTRACT:
An electrical lighted pushbutton switch is constructed by inserting a light source in the housing of the switch below a depressible actuating plunger that has a keycap retaining post. The keycap retaining post has a passageway which runs through it from its top surface to its bottom surface which is in alignment with the light source. The removeable keycap has locking detent provisions which cooperate with a mating locking groove on the retaining post. The keycap has a centrally located channel through its top surface that leads to an open cavity and is in alignment with the passageway through the keycap retaining post. A light pipe is inserted that has an upper section that fits into the channel of the keycap, a flange located below this upper section which keeps the light pipe from being forced upwardly through the channel in the keycap and a lower tapered section which is inserted into the passageway of the keycap retaining post.
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Buckman Thomas W.
Illinois Tool Works Inc.
Little Willis
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