Phonograph record player

Details Phonograph record player Phonograph record player

1976-11-09

1978-09-12

Stephan, Steven L.

Undertaking

G11B 1706

Patent

active

041132637

ABSTRACT:
In a phonograph record player, an improved control mechanism is provided for effecting lead-in movement of the tone arm from an elevated rest position outside the perimeter of the turntable to an adjustably and accurately selected set-down position of the stylus on a record supported by the turntable so as to commence a play operation, and for effecting a return movement of the tone arm to its rest position upon termination of the play operation. In such control mechanism, a pivoted main lever is made to swing in first and second directions by a cam follower thereon engaging in a cam groove of a control gear when the latter is turned for effecting the lead-in and return movements, a lead-in lever is mounted for pivoting about an axis apart from the axis of swinging of the tone arm and urged by means of a releasable coupling to follow the swinging of the main lever in such first direction and causes corresponding swinging of the tone arm in the direction of the lead-in movement of the latter, and an adjustable abutment on the lead-in lever is engageable with a selected edge portion of a record size selecting member which is turnable about a fixed axis and which has a plurality of edge portions at different radial distances from that fixed axis, so that engagement of the abutment with a selected one of the edge portions limits the swinging of the lead-in lever with the main lever for accurately determining the set-down position.

REFERENCES:
patent: 2488260 (1949-11-01), Ascol
patent: 3433486 (1969-03-01), Kawaharazaki
patent: 3438635 (1969-04-01), Hansen

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