Phonograph record player

Details Phonograph record player Phonograph record player

1976-12-16

1978-04-25

Stephan, Steven L.

Undertaking

274 1L, G11B 1706

Patent

active

040859401

ABSTRACT:
In a phonograph record player having a normal automatic operating cycle consisting of a lead-in operation initiated by actuation of a trigger for moving a tone arm from an elevated rest position outside the perimeter of the turntable to a set-down position on a phonograph record supported by the turntable, a play operation in which a pickup stylus carried by the tone arm engages the record at the set-down position and thereafter tracks the record groove for reproducing the sound recorded therein, and a return operation also initiated by operation of the trigger upon completion of the play operation for returning the tone arm to its rest position; a stop command signal for aborting the above automatic operating cycle and/or a repeat command signal for causing repetition of the automatic operating cycle is temporarily retained in a respective memory which provides a corresponding memory output, the completion of the lead-in operation and/or of the return operation is detected by a respective sensor to provide a corresponding sensor output, and, upon coincidence of the sensor output corresponding to completion of the lead-in operation or the return operation with the memory output corresponding to a retained or stored stop command signal or repeat command signal, respectively, an AND circuit provides an output for operating the trigger. Thus, the stop or repeat command signal can be generated, as by manual actuation of a respective switch, at any time during the automatic operating cycle and takes effect at an appropriate point in such cycle.

REFERENCES:
patent: 3240498 (1966-03-01), Grossenheider et al.
patent: 3438635 (1969-04-01), Hansen

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