Adjustable potentiometer assembly

Details Adjustable potentiometer assembly Adjustable potentiometer assembly

1975-05-27

1977-09-20

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338127, 338128, 338162, 338185, H01C 1048

Patent

active

040500500

ABSTRACT:
A potentiometer assembly particularly suited for supplying tuning voltages for all of the bands of signals capable of receipt by a television receiver or the like, includes three segments of resistive material arranged in a circle on a support member. Each of the segments corresponds to a different band of frequencies to which the television receiver may be tuned. Band selection is effected by comparable conductive segments on the support member.
In one embodiment, a single wiper is used to sweep all of the resistive segments to supply the desired tuning voltage output. A cam arrangement is used to adjust the detented position of the wiper relative to the support member to effect fine tuning at each position. Other embodiments utilize individually adjustable wipers for each station or detent position of the tuner, with each wiper being preset to effect the fine tuning at the detented position of the potentiometer assembly. The individual contacts or wipers for each position are arranged to overlap comparable resistances on the resistive material, so that the entire range of tuning voltages which appear across the resistive material is available from the outputs of the assembly.

REFERENCES:
patent: 2498967 (1950-02-01), Schaefer
patent: 2934731 (1960-04-01), Cotton
patent: 2950455 (1960-08-01), Brown
patent: 3519973 (1970-07-01), Louis et al.

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