Phonograph tone arm control system

Details Phonograph tone arm control system Phonograph tone arm control system

1979-06-28

1981-03-10

Phillips, Charles E.

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Information location or remote operator actuated control

Selective addressing of storage medium

369 55, 369219, 369231, 369134, G11B 1706

Patent

active

042549590

ABSTRACT:
A multi-function phonograph tone arm control system for a low-friction air bearing supported linear-travelling tone arm system is disclosed. Positive horizontal linear positioning is accomplished by means of an electromagnetic force producing system in which opposing linear forces may be balanced at any point along the path of straight-line travel of the tone arm to position the tone at any desired location. A separate electromagnetic force producing system is utilized to control the vertical pivoting of the tone arm including the pressure of the stylus on a phonograph record. A further motion damping means is provided to stabilize the motion of the tone arm and prevent any unwanted vibration of the tone arm. A means for automatically shutting off the system at the end of a record is also provided.

REFERENCES:
patent: 4087095 (1978-05-01), Koda
patent: 4138121 (1979-02-01), Nakajima et al.

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