Variable resistor with a switching mechanism

Details Variable resistor with a switching mechanism Variable resistor with a switching mechanism

1991-01-15

1992-10-13

Lateef, Marvin M.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338170, 338173, 338178, H01C 1036

Patent

active

051554658

ABSTRACT:
A variable resistor with a switching function includes arcuate resistive layers and arcuate electrodes arranged alternately on a base plate. A protective layer is formed on the base plate adjacent to a first electrode and between the arcuate resistive layers. A gap separates the protective layer from the first electrode in order to electrically isolate the protective layer. A movable portion has brushes fixed thereto which slidably contact the resistive layers, the electrodes, and the protective layer. The protective layer serves as a lubricating layer to reduce the wear on the brush.

REFERENCES:
patent: 3953821 (1976-04-01), Kelver et al.
patent: 4345236 (1982-08-01), Eichelberger et al.
patent: 4495524 (1985-01-01), Kakuhashi et al.
patent: 4751492 (1988-06-01), Tsuzuki et al.
patent: 4864273 (1989-09-01), Tsuzuki et al.
patent: 4983946 (1991-01-01), Kotaki et al.

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