Two-piece trimming potentiometer

Details Two-piece trimming potentiometer Two-piece trimming potentiometer

1978-12-14

1980-01-15

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338171, 338163, 338202, H01C 1034

Patent

active

041841409

ABSTRACT:
A trimming potentiometer (10) has a circuit track pattern (12) disposed on a base (11) having three integrally formed legs (11d). The track pattern (12) includes a collector track (12a), a resistance track (12b) and a pair of termination tracks (12c) connected to opposite ends of the resistance track (12b). Terminals for the device are formed by extending the collector track (12a)and the pair of termination tracks (12c) down the middle leg (11d) and the opposite outside legs (11d), respectively. A multi-functional contact (13) is rotatably mounted on the base (11) and includes multiple fingers (13g) that contact the resistance tracks (12b), dimpled areas (13j, 13k) which form projecting surfaces that contact the collector track (12a), a stop tab (13l) at its upper extremity that limits rotation, and outwardly extending notched tabs (13m) for receiving a suitable drive member to adjust the setting of the potentiometer (10).

REFERENCES:
patent: 2178283 (1939-10-01), Lodge
patent: 3448428 (1969-06-01), Bang et al.
patent: 3772630 (1973-11-01), Falco
patent: 3905318 (1975-09-01), Andersen et al.
patent: 3906429 (1975-09-01), Rhodes
patent: 3940198 (1976-02-01), Andersen et al.
patent: 4051453 (1977-09-01), Barden
patent: 4105988 (1978-08-01), Van Benthuysen et al.

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