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. 10, 1978
Filed:
Oct. 05, 1976
Lenard M Metzger, Rochester, NY (US);
Robert B Johnson, Scottsville, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A tracking control apparatus, for use with a rotating-head magnetic tape player, provides a tracking control head in fixed rotational association with a playback head so that both scan corresponding parallel paths across the width of the tape in fixed relationship with each other. By so mounting the tracking control head that it overlaps adjacent recorded tracks and senses periodic information included therein, the apparatus provides a control signal for driving a tape capstan servo without need for the additional control track usually required by such apparatus. The periodic information may be, for example, the horizontal sync of a video signal in the adjacent tracks; the control signal is then derived from a comparison of the respective amplitudes of such horizontal component from each track. Since the overlapping position of the tracking head is fixedly related to the tracking position of the playback head, the control signal is indicative of the tracking alignment of the playback head itself. By further mounting the tracking head on the playback head wheel, and by using the record head during playback for such purpose, a dynamic real-time tracking apparatus is provided which additionally dispenses with a separate tracking control head.