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:
Dec. 15, 1981
Filed:
Oct. 18, 1979
Applicant:
Inventors:
Hiroshi Saito, Hasuda, JP;
Hiroshi Hagino, Omiya, JP;
Kuniyoshi Nakamura, Yono, JP;
Eiitchi Kotake, Yono, JP;
Hiroshi Udagawa, Kiryu, JP;
Assignee:
Japan Servo Co., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 99 ; 360133 ;
Abstract
The driving system which drives and rotates a flexible-disc to and from which information is written in and read out by means of a magnetic head. On the top of a driving hub the flexible-disc is attached in a detachable manner, and at the bottom part of the driving hub a driving axle is directly connected coaxially. The lower end of this driving axle itself forms the rotating axle of a direct current magnetic motor. The rotation of this motor is controlled by a rotating speed controlling system so as to rotate at speed identical to any given designated velocity.