Automatic record player capable of changing discs automatically

Details Automatic record player capable of changing discs automatically Automatic record player capable of changing discs automatically

1978-08-28

1980-04-29

Shepperd, John W.

Undertaking

G11B 1716

Patent

active

042002940

ABSTRACT:
Provided is an automatic record player capable of changing discs automatically. The record player includes a spindle having holder claws for holding the record disc and a large gear adapted to be rotated in accordance with the rotation of the turn table of the player and to move the pickup of the player. The large gear is provided with a first cam groove for continuing the playing and a second cam groove for ceasing the playing, and a switching member adapted to guide a guide pin of a pickup driving member selectively to either one of the cam grooves. The switching member in turn is adapted to be controlled by a switching controlling member. The switching controlling member is adapted to be engaged, when at least a record disc is held by said holder claws, by a spindle shaft which has been lowered due to the weight of the disc to a predetermined lowered position, and biases the switching member so as to make the latter guide the guide pin of the driving member into the cam groove for continuing the playing. To the contrary, when there is no disc carried by the holder claws, the switching controlling member is not engaged by the spindle shaft, because the latter is not lowered, so that it is moved to an inoperative position where it biases the switching member such that the guide pin of the pickup driving member into the cam groove for ceasing the playing.

REFERENCES:
patent: 3507503 (1970-04-01), Freier
patent: 3820797 (1974-06-01), Suzuki et al.

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