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:
Aug. 24, 1982
Filed:
Jun. 17, 1980
Joachim Hack, Ludwigshafen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A magnetic head positioning servo arrangement for a system for recording or reproducing information on a flexible magnetic recording medium, the position of the head being adjustable, relative to the magnetic tracks of the recording medium, by means of an actuator, and each magnetic track being provided with at least one reference signal which, when sensed, provides information about the momentary position of the head and, in the case of mistracking, generates in a comparator circuit a control signal for the actuator which moves the magnetic head back over the center of the track, the reference signal consisting of at least one pair of pulse sequences which are recorded asymmetrically with respect to the center of the track and which, when sensed, produce increasing or decreasing signal pulses.