Royston Manufacturing Corporation

Charles Christian

Richard P Adams

In a mechanical press brake, a photoelectric sensor causes extension of an air cylinder in the linkage between the operating pedal and the clutch lever, thereby disabling the pedal whenever the operator's hand or arm is in dangerous proximity to the machine's ram. The piston of the air cylinder is connected to the pedal through a lost-motion, and the pedal is continuously urged toward its rest position by a spring. The lost-motion and spring prevent repeated extension and retraction of the cylinder from causing dangerous and annoying operation of the pedal during preparation for a forming operation.

Growing community of inventors

Jasper, GA, United States of America

Charles Christian