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:
Oct. 25, 1988
Filed:
Apr. 10, 1987
Applicant:
Inventor:
Keizo Hama, Kamakura, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 73 ; 318254 ; 318433 ;
Abstract
A spindle motor driving apparatus for a disc device in which in addition to a controller for operating a spindle motor at a predetermined speed, a switch for shorting a current limiting resistor provided between a motor power supply circuit and a driving circuit is closed in response to a predetermined condition after the motor is started.