Variable resistor

Details Variable resistor Variable resistor

1988-07-20

1989-09-05

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338309, 338320, 338334, H01C 1034

Patent

active

048642738

ABSTRACT:
A variable resistor having a multi-layer resistive/conductive element is provided. The resistor has three electrodes, a resistive element connecting two of the electrodes and a sliding contact between the resistive element and the third electrode. The base of the resistor is provided with test areas. Each of the test areas contains a strip of the material used to form an individual layer in the multi-layer element. The test areas provide a convenient means for measuring the thickness of the individual layers in the multi-layer element without having to destroy the resistor.

REFERENCES:
patent: 3851253 (1974-11-01), Clayton
patent: 3961302 (1976-06-01), Hufford
patent: 4243969 (1981-01-01), Steigerwald et al.

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