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:
Sep. 11, 1984
Filed:
Apr. 02, 1982
Applicant:
Inventor:
Rick L Reagan, Santa Clara, CA (US);
Assignee:
Ampex Corporation, Redwood City, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360723 ; 360 70 ; 360137 ;
Abstract
An improved tape timer is achieved by using pulses generated by a control track previously recorded on magnetic tape to determine the magnitude of phase shift between said control track pulses and pulses generated by a mechanical tachometer in contact with the magnetic tape. The pulses generated by said mechanical tachometer are counted and said counting sequence used to generate a pulse to up-date a tape timer. In response to a detected phase shift, the count sequence is dynamically adjusted by an amount determined by the magnitude of the phase shift in such a manner as to reduce said phase shift.