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. 26, 1988
Filed:
Apr. 11, 1986
Applicant:
Inventors:
David R Rodal, Palo Alto, CA (US);
Harold V Clark, Los Altos, CA (US);
Assignee:
Ampex Corporation, Redwood City, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
B65H / ; H02P / ;
U.S. Cl.
CPC ...
242190 ; 242 7551 ; 318-6 ;
Abstract
In a tape transport apparatus, a first servo feedback loop is provided for correcting tape tension by adjusting the rotation of a tape reel in response to the sensed position of a tension arm that engages the moving tape. A second feedback loop senses the rate of change in the position of the tension arm and responsively damps the tension arm position changes by means of a lead circuit which causes a torque motor coupled to said pivotable arm to move in opposition to the tension arm position changes.