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. 17, 1978
Filed:
Jan. 26, 1977
Applicant:
Inventor:
Roman Derc, Bracknell, GB;
Assignee:
Data Recording Instrument Co., Ltd., Staines, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 78 ; 318634 ; 360109 ;
Abstract
The positioning of the head positioning mechanism of a magnetic disc file is controlled by a servo system arrangement which involves separately monitoring the temperature conditions in the vicinity of the center track of a disc file and the head positioning mechanism; producing related electrical signals which are used in conjunction with signals defining the address of a required track of a disc and a reference voltage to obtain a temperture corrected signal which is used to produce a head positioning control signal.