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:
Jul. 16, 1985
Filed:
Sep. 22, 1983
Atsushi Ishihara, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A rotatable memory disk apparatus is provided with a memory disk with a number of tracks driven by a motor and a control circuit for positioning an optical head on an addressed track. The apparatus includes a speed control device for rotating the disk at a rotational speed corresponding to the addressed track. The speed control device includes a conversion circuit for converting a track-addressing signal from the control circuit into an instruction signal for the rotational speed of the disk, a detector for obtaining a rotational speed signal of the disk, and a control device which receives the rotational speed instruction signal and the rotational speed signal to rotate the disk at a predetermined rotational speed for the addressed track.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile