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:
May. 29, 1990
Filed:
Aug. 08, 1988
Atsuhiro Yabu, Nagaokakyo, JP;
Toshiro Tsukahara, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An automatic tracking speed compensating drive unit 4a for a rotary drum VCR includes a deflection control coil 44 wound around a bobbin 43 mounted to a magnetic yoke assembly 47 by upper and lower spring plates 200, 100. The lower plate has a larger spring constant than the upper plate such that the 'softer' upper plate absorbs substantially all thermally induced axial elongations of the bobbin, thereby avoiding tracking errors of a magnetic r/w head 5 mounted on a tab extending outwardly from the 'stiffer' lower spring plate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile