Phonograph record player

Details Phonograph record player Phonograph record player

1976-11-09

1978-07-04

Stephan, Steven L.

Undertaking

274 10R, G11B 1706, G11B 1708

Patent

active

040985121

ABSTRACT:
In a phonograph record player, an improved control mechanism is provided for effecting lead-in movement of a tone arm from an elevated rest position outside the perimeter of a turntable to a selected set-down position on a record supported by the turntable so as to commence a play operation, and for effecting a return movement of the tone arm ito its rest position upon the termination of the play operation. In such control mechanism, a main lever is made to swing by a cam follower engaging in a cam groove of a control gear to effect the lead-in and return movements upon rotation of the control gear by a drive gear rotated with the turntable. In order to prevent damage to prevent damage to the needle or stylus or to the sound grove of the phonograph record, a tone arm drive mechanism for swinging the tone arm in response to swinging of the main lever is disengaged at the commencement of a play operation to remove any restraints on the movement of the tone arm.

REFERENCES:
patent: 3433486 (1969-03-01), Kawaharazaki
patent: 3697087 (1972-10-01), Takahashi

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