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:
Mar. 27, 1984
Filed:
Sep. 02, 1981
Applicant:
Inventor:
Daiki Nabeshima, Kamakura, JP;
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 50 ; 369111 ; 369240 ; 358338 ; 358339 ;
Abstract
An apparatus for controlling the rotational speed of a recording disc to a constant linear velocity. The apparatus has frequency and phase control circuits which detect the variations of the frequency and phase of the digital information signal reproduced from the disc, to detect the rotation speed of the disc. The rotation of the disc is controlled in response to the control signals from the frequency and phase control circuit to a constant linear velocity.
Nabeshima, Daiki. (1984). Rotational speed controlling apparatus for recording disc (U.S. Patent No. 4439849). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4439849
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile