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:
Jun. 11, 1996
Filed:
Aug. 17, 1994
Applicant:
Inventors:
Michael R Hatch, Mountain View, CA (US);
Joseph T Castagna, San Jose, CA (US);
Chee K Han, Milpitas, CA (US);
Assignee:
Quantum Corporation, Milpitas, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360109 ; 360104 ; 360 9702 ;
Abstract
A method and apparatus for sensing vibration in a flex circuit located between a rotary actuator and electronics within a disk drive. Specifically, the apparatus contains a strain gauge attached to or imbedded within the flex circuit. The resistivity of the strain gauge varies in response to vibrations on the cable. This resistance variation can be transformed into electrical signals that are used by a servo system to move the actuator assembly in compensatory motion that effectively cancels any off-track motion caused by the vibrations.