Tone arm damping device
AssigneePioneer Electronic Corporation
InventorJunichi Onishi
Life of this patent
Estimating the term…
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.
Claims7
A tone arm damping device comprising:
- a main fixed shaft secured to a base member;
- a
- first rotatable body;
- first rotary bearing means for rotatably supporting said first rotatable body upon said fixed shaft for rotation about a first axis;
- a damping fluid;
- a second rotatable body having a concave portion for receiving said damping fluid therein and said second rotatable body having a tone arm tube extending therefrom;
- second rotary bearing means for rotatably supporting said second rotatable body on said first rotatable body for rotation about a second axis perpendicular to said first axis;
- and
- damping means fixedly secured on said main shaft and having portions disposed in said damping fluid to thereby eliminate resonance in both horizontal and vertical directions.
Dependencies are inferred from the claim text.