Devices used for varying the resistance of electrical circuits a

Details Devices used for varying the resistance of electrical circuits a Devices used for varying the resistance of electrical circuits a

1985-01-23

1987-09-08

Goldberg, E. A.

Electrical resistors

Mechanically variable

With switch actuated by resistor actuator

338178, 338200, H01C 1050

Patent

active

046928057

ABSTRACT:
A device forming a potentiometer for varying the resistance of an electrical circuit, and a switch for changing the state of current conduction in the circuit. The switch has a casing fastened to the potentiometer, and the potentiometer has a casing and a plate joined together. The device has a rotatable component having a central protuberance extending through the plate. A first discoidal element is carried by the rotatable component and has a metallic cursor. A resistance track and a metallic collector are stationarily mounted on the plate. The cursor is continuously and simultaneously in contact with the resistance track and the collector. A second discoidal element is mounted in the switch casing for engagement by the protuberance and is releasably coupled to the rotatable component when the switch is coupled to the potentiometer. A fixed contact is mounted on the switch casing and a movable contactor arm is movable mounted on the switch casing.

REFERENCES:
patent: 2318768 (1943-05-01), Foster et al.
patent: 3644865 (1972-02-01), Kirby et al.
patent: 3833783 (1974-09-01), Tanaka et al.
patent: 3896410 (1975-07-01), Matthews et al.
patent: 3952278 (1976-04-01), Kiyono

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