Lead screw type variable resistor

Details Lead screw type variable resistor Lead screw type variable resistor

1981-08-24

1982-12-21

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338177, 338183, 338188, H01C 1040

Patent

active

043652301

ABSTRACT:
Variable resistor comprises a lead screw 12 rotatably mounted to substrate 42 by conductive mounts 18, 18' and engaging a one-piece stamped and formed sheet metal slider 16 movable along circuit trace 20 in response to rotation of the screw 12. The lead screw 12 is a conductive plastic and thus acts as a resistance element, the resistance between the mounts 18, 18' and the circuit trace 20 being varied by rotating the screw 12. Mounts 18, 18' have spring-loaded arms 34, 36 which releasably retain the lead screw 12 so it may be replaced if it is desired to change the resistance limits of the device.

REFERENCES:
patent: 3742421 (1973-06-01), Van Rooijen

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