Conductive elastomers in potentiometers & rheostats

Electrical resistors – Mechanically variable – Deformable

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Details

338 99, H01C 1010

Patent

active

048334405

ABSTRACT:
An apparatus for varying impedance includes a first conductive member, a second member associated therewith, and a third wiper member electrically contacting the first and second members. Use of a conductive rolling member as the third wiper member minimizes wear and degradation of all members. Alternately, or in conjunction with a rolling wiper member, use of a conductive elastomer further eliminates wear.

REFERENCES:
patent: 2744981 (1956-05-01), Spears
patent: 4163204 (1979-07-01), Sado et al.
patent: 4426884 (1984-01-01), Polchaninoff

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