Patent ID: 6184870
Filing Date: 2001-02-06
Classification: G06F

Abstract:
An electronic input device for translating movement of a ball into digital signals for control of a cursor in a personal computer or workstation comprising:a housing having an opening therethrough;a ball extending through said opening;first and second shaft encoders having a shaft and an encoder disk;first and second pairs of spindle supports, each of said pairs integrally formed with the housing and supporting said shaft encoders;a printed circuit board mounted on said housing;at least one optical emitter mounted on said printed circuit board, adjacent one of said encoder disks;first and second optical receivers mounted on said printed circuit board, each being adjacent one of said encoder disks;a roller;a roller support integrally formed with said housing; andthe ball being sandwiched between the roller and the shaft encoders to cause the shaft encoders to remain in contact with the ball whenever the ball is moved during operation of the electronic input device.