Variable impedance device and circuit for sensing adjustment the

Details Variable impedance device and circuit for sensing adjustment the Variable impedance device and circuit for sensing adjustment the

1989-08-01

1992-09-01

Lateef, Marvin M.

Electrical resistors

Mechanically variable

With switch actuated by resistor actuator

338200, 338201, 338172, 338178, 338217, H01C 1050

Patent

active

051442787

ABSTRACT:
A circuit and apparatus for sensing the adjustment of a variable impedance device includes an elongated switching element having an alternating series of conductive and non-conductive areas. The conductive areas are electrically connected. As the device is adjusted, a wiper alternately operates the switch between open and closed states. A circuit detects the switch-state change and provides a signal which indicates that the device is being adjusted. The signal can, in turn, determine the output of a dimming circuit, a wireless transmitter, etc., or can determine whether power is provided to a microprocessor or the like. In another embodiment of the invention, a variable impedance device includes an end-of-travel return mechanism.

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Lutron Electronics Co., Inc.--Nova Omnislide Brochure--P/N 360-167, 1988.

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