Xerox Corporation

Thomas D Gross

Brian E Jagger

Bernard D Benz

Edward M Carlin, Jr

An anti-backlash double universal flexible coupling for providing positive and accurate angular positioning, constant rotational velocity and constant torque between an input driving shaft and an output driven shaft. The coupling includes universal pins supported by the driving and driven shafts and an intermediate coupling link comprising two coupling plates having bearing surfaces urged against the pins by a resilient element. The pins are maintained coplanar and parallel between the coupling plates.

Anti-backlash double universal flexible coupling

An improved print element shifting apparatus having a shifting cam movable in an arc for moving a rotatable print element between two positions by means of a shifting solenoid, and for reducing the mid-stroke peak load on the solenoid. A load modifying linkage arrangement is provided between the shifting solenoid and the shifting cam for imparting movement to the shifting cam alternatively from the one of two drive elements having the greatest mechanical advantage.

Print element shifter

A ribbon cartridge for use in impact printers, typewriters or the like in which a supply spool and a take-up spool are enclosed in a housing with the center of each spool being supported for rotation and for floating movement along a guide path. A fixed center drive capstan imparts surface movement to the take-up spool which in turn imparts surface movement to the supply spool. A spring urges the surfaces of the spools together and the take-up spool against the drive capstan to effect the serial drive train.

Growing community of inventors

Los Altos, CA, United States of America

Thomas D Gross