The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 1986
Filed:
Mar. 08, 1984
Alps Electric Co., Ltd., , JP;
Abstract
An X-Y input device comprises a rotatable ball, a first driven roller held in contact with the rotatable ball and rotatable in response to rotation of the rotatable ball, a second driven roller held in contact with the rotatable ball and rotatable in response to rotation of the rotatable ball, the second driven roller having an axis of rotation extending substantially perpendicularly to that of the first driven roller, first rotation detector means for detecting an amount of rotation of the first driven roller, second rotation detector means for detecting an amount of rotation of the second driven roller, and frictional force imposing means for resiliently urging the ball against the first and second driven rollers to impose frictional forces between the ball and the driven rollers, the frictional force imposing means comprising a contact roller held in rolling contact with the ball and having a shaft, a slidable roller support having bearings supporting opposite ends of the shaft and a spring bearing, a fixed member having a spring bearing opposite to the spring bearing of the slidable roller support, and a coil spring interposed under compression between the spring bearing of the slidable roller support and the spring bearing of the fixed member for normally urging the contact roller against the ball.