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:
Feb. 08, 1977
Filed:
May. 06, 1975
Michael Isaac Behr, South Pasadena, CA (US);
Norman Stephen Blessum, Thousand Oaks, CA (US);
Wilfred Dean Iwan, Sierra Madre, CA (US);
Burroughs Corporation, Detroit, MI (US);
Abstract
Data is recorded on a magnetic recording disk with data transducers adjustably positioned relative to a data zone. First and second control tracks are interspersed with the data zone in a parallel relationship. Positioned over each control track is a position sensing transducer mechanically linked to the data transducers. The control transducers each comprise core gaps used both for prerecording and subsequent reading of a position control pattern along their respective tracks. The core gaps extend diagonally at a predetermined angle to the direction of movement of the medium and provide control patterns defining multiple transition groups, the number of transitions related to a corresponding number of data tracks to be read by the data transducers. Positioning of the position sensing transducers is accomplished by measuring the time relationship between the output pulses of the two control tracks and by relating the resulting time differential to the radial distance over which the control head is to be actuated.