Device for manually controlling movement of pickup arm in automa

Details Device for manually controlling movement of pickup arm in automa Device for manually controlling movement of pickup arm in automa

1978-09-18

1980-05-13

Phillips, Charles E.

Undertaking

318640, G11B 300

Patent

active

042025494

ABSTRACT:
A device for manually controlling movement of a pickup arm in an automatic record player, comprising: a manually movable manipulation member; a detecting unit including at least one light-emitting element and at least two light-receiving elements disposed to receive the beam of light emitted from the light-emitting element to detect the amount and direction of a movement of the manipulation member and to generate a corresponding signal; control circuitry receiving this signal to generate an output corresponding to the direction and the amount of the movement of the manipulation member; and a driving unit for causing linear parallel movement of the pickup arm radially of a record disk and actuated by the output of the control circuitry to move this pickup arm in a direction and amount of movement corresponding to those of the manipulation member. This device assures easy and free control of the movement of the pickup arm in a desired direction and amount by manipulation of a single manipulation member, and improves the life of the detecting unit due to non-mechanical contact mechanism of this unit.

REFERENCES:
patent: 2952464 (1960-09-01), Stimler
patent: 3662363 (1972-05-01), Chertok
patent: 3672687 (1972-06-01), Ben Daniel et al.
patent: 3937903 (1976-02-01), Osann

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