Illumination type rotary variable resistor

Details Illumination type rotary variable resistor Illumination type rotary variable resistor

1984-02-01

1985-06-11

Envall, Jr., Roy N.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338196, 338191, 338200, H01C 1030

Patent

active

045231745

ABSTRACT:
Disclosed is an illumination type rotary variable resistor, in which a hollow shaft rotatable and displacable in the thrust direction and is coupled to a rotatable knob, in which a photo-conductive element is disposed within the hollow shaft and the knob, in which one end of the photo-conductive element is exposed at an end surface of the knob, in which a light source is provided close to the other end of the photo-conductive element, in which a driver member is placed in contact with a forward end of the hollow shaft to cause a switch to perform its switching operation, and in which a reflex surface is formed on the driver member to reflect light from the light source towards the photo-conductive element.

REFERENCES:
patent: 2492286 (1949-12-01), Hermann
patent: 3997864 (1976-12-01), Oka et al.
patent: 4363018 (1982-12-01), Matsui et al.

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