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:
Apr. 08, 1986
Filed:
Mar. 29, 1983
Applicant:
Inventors:
Yoshihiko Yanagawa, Saitama, JP;
Atutaka Morimoto, Saitama, JP;
Assignee:
Citizen Watch Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318696 ; 318685 ; 360 75 ; 360 77 ;
Abstract
A device for feeding a magnetic head used in a magnetic disc apparatus, wherein phase currents of the pulse motor are controlled by sensing the signals that are produced in proportion to off-track quantity of the head or by receiving signals that results from an error contained in the reproduced signals, in order to bring the head to a proper position.