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:
May. 20, 1986
Filed:
Nov. 14, 1983
Applicant:
Inventor:
Nicholas M Warner, Livermore, CA (US);
Assignee:
Burroughs Corporation, Detroit, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 78 ; 360 77 ;
Abstract
A positioning system, suitable for positioning a head adjacently to data tracks on a rotating magnetic data storage disc and employing a polyphase optical position detente transducer, overcomes positioning inaccuracies associated with the relative spacing between the polyphase position indicating signals by measuring the span of all the phases in terms of demand to produce head movement applied to a D/A convertor, calculating the ideal stopping positions, and applying the inverse error demand through the convertor when positioning the head.