Tone arm

Details Tone arm Tone arm

1979-07-06

1981-02-17

Phillips, Charles E.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specified detail of transducer assembly support structure

G11B 316

Patent

active

042510805

ABSTRACT:
A tone arm comprising a lever which has a pivoted axle mounted in an articulated joint and carries on one of its ends a pickup head. A viscous dynamic damping subassembly is designed to eliminate the main resonance frequency of the tone arm and includes a hollow casing rigidly affixed to the lever. The inner chamber of the casing is symmetrical relative to two mutually perpendicular axes and is filled to the fullest extent with a viscous fluid serving as a damping medium.

REFERENCES:
patent: 3297830 (1967-01-01), Baloghy
patent: 3836155 (1974-09-01), Joannou
patent: 4079943 (1978-03-01), Morita et al.
patent: 4154445 (1979-05-01), Joannou

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