Tone arm pick up system

Details Tone arm pick up system Tone arm pick up system

1979-05-29

1984-02-28

Shepperd, John W.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

369 43, G11B 310

Patent

active

044344821

ABSTRACT:
A tone arm system for a high fidelity record player is provided having servo-controlled record warp compensation means. One or more feedback loops are employed to apply a variable force vertically and optionally, laterally, to the tone arm in response to the frequency of stylus vibration. The action of the feedback loop or loops is used to modify the parameters of the tone arm system to provide a predetermined resonance quality factory and a predetermined resonant frequency.

REFERENCES:
patent: 3471655 (1969-10-01), Herre
patent: 3623734 (1971-11-01), Sakamoto
patent: 3744802 (1973-07-01), Bowerman
patent: 3830505 (1974-08-01), Rabinow
patent: 4102536 (1978-07-01), Clunis
patent: 4105961 (1978-08-01), Plummer et al.
patent: 4178489 (1979-12-01), Lippel et al.

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