Pickup arm drive device

Details Pickup arm drive device Pickup arm drive device

1982-01-15

1984-09-11

Stephan, Steven L.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 41, 369216, G11B 338, G11B 1706

Patent

active

044714769

ABSTRACT:
In a pickup arm drive device of a record player capable of automatically selecting a desired music on a record disc on which a plurality of pieces of music are recorded, at least two inter-music sensors are arranged near a stylus on the pick-up arm to detect inter-music spaces on the record disc. The outputs of the sensors are subjected to processing and by using the resultant processed outputs, the driving of the pickup arm is switched from "lead-in" or "return" operation to an inter-music position servo operation. Therefore, the stylus of the pickup arm can be lowered exactly onto the inter-music space on the record disc even if the record has an eccentricity or warp.

REFERENCES:
patent: 4093832 (1978-06-01), Isaacson et al.
patent: 4109114 (1978-08-01), Baer et al.
patent: 4375092 (1983-02-01), Yoshio

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