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US 2006/0203695 A1Published application
Tone arm magnetic stabilization and damping system
OwnerRobert Grahaminventor
Life of this patent
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Abstract
A unipivot tone arm assembly wherein the tone arm is supported by a single point is balanced in such a way as to have neutral stability providing constant tracking force over the peaks and valleys of phonograph records. Lateral stability lacking in a neutral balanced unipivot tone arm is provided by magnetic coupling between magnets on the tone arm housing assembly and a freely rotating platform. Anti-skate is accomplished through a pulley mechanism between the rotating platform and the tone arm gantry, with the pulley on a counterweighted rotating pivot arm.
Claims8
A tone arm stabilizer apparatus, comprising:
- (a) a first magnet;
- (b) a second magnet;
- (c) a support member;
- (d) said first magnet attached to a tone arm housing assembly along a horizontal line extending sideways from the tone arm pivot point;
- (e) said second magnet attached to said support member;
- (f) said first and second magnets not in physical contact with each other and oriented such that the magnetic forces provide attraction force between the magnets, and;
- (g) said support member rotatably mounted on the tone arm pivot assembly base.
4 more elements
A tone arm stabilizer apparatus, comprising:
- (a) a first magnet;
- (b) a second magnet;
- (c) a support member;
- (d) a pulley;
- (e) a pivoting arm;
- (f) a counterweight;
- (g) a calibrated rod;
- (h) said first magnet attached to a tone arm housing assembly along a horizontal line extending sideways from the tone arm pivot point;
- (i) said second magnet attached to said support member;
- (j) said first and second magnets not in physical contact with each other and oriented such that the magnetic forces provide attraction force between the magnets;
- (k) said support member rotatably mounted on the tone arm pivot assembly base;
- (l) said pulley wheel mounted on one end of said pivoting arm;
- (m) the other end of said pivoting arm rotatably mounted to tone arm gantry;
- (n) one end of said pulley anchored on the said support member;
- (o) the other end of said pulley anchored on the the tone arm pivot assembly base.
- (p) said counterweight slidably mounted on said calibrated rod and attached to said pivoting arm, and;
- (q) said pulley mounted to said pivoting arm at about right angles to said counterweight and said rod.
14 more elements
Dependencies are inferred from the claim text.