Rheostat trimmer

Details Rheostat trimmer Rheostat trimmer

1978-10-10

1980-05-27

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338171, 338174, H01C 1026

Patent

active

042052963

ABSTRACT:
A rheostat (10) has a disk-shaped base (11) that is slidably mounted between a pair of spaced terminal pins (12, 13). A resistance track (14) is disposed on top of the base (11) and is connected to a collector track (15) that is disposed around the circumference of the base (11). A collector terminal pin (12) has contacts (12d) in sliding engagement with the collector track (15), and a wiper terminal pin (13) has an oblique contact surface formed by projections (13g) that slidably engage the resistance track (14). The terminal pins (12, 13) can be mounted on a supporting surface, so that as the base (11) is rotated, the resistance between the terminal pins (12, 13) is varied. The oblique contact surface on the wiper terminal pin (13) aids in maintaining a balanced current distribution in the resistance track (14).

REFERENCES:
patent: 2857496 (1958-10-01), Louis
patent: 2899662 (1959-08-01), Barden et al.
patent: 3375478 (1968-03-01), Van Benthuysen et al.
patent: 3469311 (1969-09-01), Van Benthuysen et al.
patent: 3484734 (1969-12-01), Casey et al.
patent: 3657688 (1972-04-01), Casey et al.
patent: 3855565 (1974-12-01), Robinson et al.

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