Potentiometer having switching function

Details Potentiometer having switching function Potentiometer having switching function

1986-04-23

1987-03-03

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338174, 338324, 338325, 338198, H01C 1036

Patent

active

046478973

ABSTRACT:
A potentiometer which provides the function of an on/off switch includes a center conductor connected to a conductive ring and a resistive element concentrically disposed about the conductive ring. The resistive element includes a pair of termination pads and one of the pads includes a branch which is situated outside the outer periphery of the resistive element. As a wiper arm traverses the resistive element it remains in contact with the branch for a brief distance and then loses contact with it. This causes the value of the resistance in the potentiometer to make an abrupt shift in magnitude which can be used to initiate various switching functions.

REFERENCES:
patent: 2873336 (1959-02-01), Tassara
patent: 3990033 (1976-11-01), Wall
patent: 4041439 (1977-08-01), Steddom et al.

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