Variable resistance device for thick film circuitry

Details Variable resistance device for thick film circuitry Variable resistance device for thick film circuitry

1978-11-21

1981-02-10

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338174, 338202, H01C 1032

Patent

active

042504813

ABSTRACT:
A variable resistance device includes a thick film electrical conductor affixed to the underside of a supporting substrate and extending circumferentially around a hole. A radially spaced, film-like resistor surrounds the electrical conductor. A knob has a disc bearing on the top side of the substrate and a pair of projections extending through the hole to journal the knob in the substrate and to mount a carrier adjacent the underside of the substrate. A wiper means is mounted on the upper surface of the carrier for engaging the electrical conductor and resistor to vary the resistance of the device responsive to rotation of the knob through a manipulative means.

REFERENCES:
patent: 2177290 (1939-10-01), Schellenger
patent: 2811621 (1957-10-01), Mucher et al.
patent: 2858397 (1958-10-01), Littleton
patent: 2925575 (1960-02-01), Barden
patent: 3032734 (1962-05-01), Zunker et al.
patent: 3389364 (1968-06-01), Budd et al.
German Printed Publication 26541, Mertig.

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