Apparatus for controlling pickup arm in record or video disk pla

Details Apparatus for controlling pickup arm in record or video disk pla Apparatus for controlling pickup arm in record or video disk pla

1981-12-08

1984-03-13

Goldberg, Gerald

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

369216, 369221, 369 33, 369 41, G11B 1706, G11B 1700

Patent

active

044371802

ABSTRACT:
A pickup arm controlling apparatus for an audio record or a video disk player, comprising an optical detecting device provided at the foremost end portion of a pickup arm for detecting a non-recorded groove portion, arranged so that a reproduction of the disk is performed by causing, due to the detecting device, the pickup arm to make a lead-in motion while the detecting action is being performed, and stopping the lead-in motion of the pickup arm upon detection of a predetermined non-recorded groove portion, and causing a stylus to descend onto the surface of the disk, wherein arrangement is provided so that, after the pickup arm has ceased its motion during the lead-in action, the pickup arm is forced to make a reversed run only for a trifle amount or distance to thereby compensate for an overshooting which could occur during the lead-in motion of the pickup arm. This trifle amount of the reversed run can be varied. Also, during a manual lead-in operation, the overshoot-compensating action is released.

REFERENCES:
patent: 3937903 (1976-02-01), Osann, Jr.
patent: 4106775 (1978-08-01), Takizara
patent: 4114893 (1978-09-01), Leach et al.
patent: 4134593 (1979-01-01), Hiramatsu
patent: 4174891 (1979-11-01), Flint et al.

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