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:
Jan. 24, 1989
Filed:
Oct. 20, 1986
Applicant:
Inventor:
Tsuneo Ishii, Saitama, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 7814 ; 369 32 ; 371-7 ; 371 10 ;
Abstract
A head system for a disk on which address data are recorded on the disk. A head is first driven to an intended track and an attempt is made to read the address. If the address is not successfully read in a predetermined time, corresponding to the tracing of predetermined number of tracks, the head is driven in one radial direction and address reading is again attempted for the predetermined time. If again the address reading is unsuccessful, the head is driven in the opposite radial direction. The alternating head movement is continued until an address is successfully read.