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. 31, 1978
Filed:
Apr. 08, 1977
Applicant:
Inventor:
Johann Kruger, Quickborn, DE;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 77 ; 360131 ; 1791 / ; 1791 / ;
Abstract
A system for the position control of a write-read head for information carriers with a magnetic storage layer, having optical servo tracks. The servo tracks consist of periodically interrupted lines, whose period length is constant and whose phase relationship differs for adjacent servo tracks. An optical scanner is connected to the magnetic write-read head and is provided with a diaphragm which transmits at the most one line section and at least one overlap between two adjacent line sections to the scanner.