Variable resistance electrical control units

Details Variable resistance electrical control units Variable resistance electrical control units

1976-04-19

1978-01-17

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338167, 338202, H01C 1024

Patent

active

040694666

ABSTRACT:
An electrical control unit operable as a rheostat or a potentiometer comprising an electrical circuit portion of a resistive electrically conducting material formed on a support in a spiral configuration, a spindle mounted for rotation about the center of the spiral, an arm non-rotatably engaged on the spindle but slidable relatively to the spindle radially with respect to the axis thereof, an electrical contact carried on the arm to move radially therewith, to make contact with said circuit portion, and a spiral guide means aligned with the circuit portion spiral and co-operable with the arm to guide said arm radially, so that the electrical contact follows the circuit portion spiral to alter the effective electrical resistance thereof in use.

REFERENCES:
patent: 1785779 (1930-12-01), Lauter
patent: 2542113 (1951-02-01), Bowitz et al.
patent: 2712584 (1955-07-01), Pantages
patent: 2745915 (1956-05-01), Pantages

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