Paul C Spangler, 72Bradenton, FL

4322711, Mar 30, 1982

Dec 19, 1980

6/218310

Paul C. Spangler - Westport CT
Searle T. Spangler - Westport CT

Blackstone Industries, Inc. - Bethel CT

H01C 1000

338153

A foot pedal operated motor control is provided for controlling the speed of a motor. The entire motor control circuit is mounted in a foot pedal housing which circuit includes a generally disc shaped potentiometer having a rotatable and a stationary member with the movement of the rotatable member with respect to the stationary member determining the resistance of the potentiometer which controls the current to a motor whose speed is to be controlled. The disc shaped potentiometer has an opening therethrough. A foot pedal is pivotally mounted on the housing overlying the potentiometer and a helical member extends between the foot pedal on one end thereof and into the opening of the disc shaped potentiometer on the other end thereof. When the foot pedal is depressed the helical member is moved linearly turning the rotatable member with respect to the stationary member of the disc shaped potentiometer thereby varying the resistance of the potentiometer which controls the current in the motor control circuit in accordance with the movement of the foot pedal. This control is considerably less expensive than slide type or other rotary type potentiometers.