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:
Apr. 24, 1979
Filed:
Mar. 22, 1976
Applicant:
Inventors:
Raymond F Ravizza, Cupertino, CA (US);
James R Wheeler, Belmont, CA (US);
Assignee:
Ampex Corporation, Redwood City, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 77 ; 360107 ; 360109 ;
Abstract
A magnetic head, rotating at high speed in a reproduce relationship with a magnetic tape, is supported on the free end of a piezoelectric bender element. The bender element is caused to vibrate between two limits at a fixed frequency (dither) to determine the instantaneous position of the magnetic head relative to a track of data recorded along the tape. A feedback servo provides continuous adjustment of the position about which the transducer is vibrated so as to maintain the magnetic head in an optimum reproduce relationship with respect to the track.