Compact electrical control

Details Compact electrical control Compact electrical control

1977-02-16

1978-08-22

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338123, 338128, 338130, 338162, 338184, 338199, H01C 1032

Patent

active

041092309

ABSTRACT:
A compact electrical control, such as a potentiometer, a rheostat, or a switch includes a housing and a shaft rotatably mounted within the housing. The housing has a cavity for receiving a resilient annular seal surrounding the shaft, and the shaft is provided with a radial pressure plate that bears against the seal. A rotary assembly composed of resistance or switch elements is mounted on the shaft between the pressure plate and a journaled end of the shaft, and the resistance or switch elements are contacted by stationary contacts held in the housing. The seal is axially compressed between the pressure plate on the shaft and a cavity end wall, and is radially compressed between a circumferential side wall and the shaft, so that the seal both prevents liquid from entering the housing along the shaft and controls axial end play of the shaft.

REFERENCES:
patent: 2922973 (1960-01-01), Vacha
patent: 3200208 (1965-08-01), Mastney
patent: 3227822 (1966-01-01), Corey
patent: 4031348 (1977-06-01), Eberhardt

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