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. 08, 1988
Filed:
Jun. 03, 1986
Applicant:
Inventors:
Assignee:
Nippon Gakki Seizo Kabushiki Kaisha, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369270 ;
Abstract
In a disc playback device of a type in which a turntable is connected to a disc motor shaft, a disc centering device comprises at least three disc centering members provided in the turntable substantially concentrically with the disc motor shaft and separately moveably in the radial direction of the turntable, the centering members being capable of engaging a central opening of a disc, and urging means provided in the turntable for urging the centering members radially outwardly of the turntable. The centering members engaged in the central opening of the disc work in association with the urging means to position the disc concentrically with the disc motor shaft.