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:
Dec. 08, 1981
Filed:
Sep. 18, 1979
Applicant:
Inventor:
Junichi Onishi, Tokorozawa, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369248 ;
Abstract
A tone arm damping device which provides damping for both horizontal and vertical vibration forces utilizing a single damping mechanism. A gimbal-type support structure includes first and second rotatable bodies rotated respectively from a fixed shaft and from each other. The second or inner rotatable body has formed therein an annular reservoir of damping fluid. A fluted damping ring, attached through an adjustment mechanism to the fixed shaft, extends into the fluid reservoir. The extent of the damping ring into the fluid and hence the amount of the damping force may be set by the adjustment mechanism.