Device for controlling pickup arm movement in linear tracking pi

Details Device for controlling pickup arm movement in linear tracking pi Device for controlling pickup arm movement in linear tracking pi

1980-06-13

1982-04-13

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

360 77, G05B 106

Patent

active

043250165

ABSTRACT:
A device for controlling movements of pickup arm in linear tracking pickup arm apparatus comprises an offset angle detecting mechanism of photo-electricity conversion type for detecting a horizontal offset of the arm and a servo mechanism for correcting the arm offset. The servo mechanism is disabled by turning-off a light-emitting element in the detecting mechanism when the pickup arm is at an uplifting position as well as at limiting end positions in a horizontal arm travel. The initiation of the servo action of the mechanism is effected gradually by gradual illumination of the light-emitting element.

REFERENCES:
patent: 3906326 (1975-09-01), Chur
patent: 3945037 (1976-03-01), Johnson
patent: 3994016 (1976-11-01), Moghadam
patent: 4202549 (1980-05-01), Takeuchi

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