Positioning device for an automatic changing apparatus employing

Details Positioning device for an automatic changing apparatus employing Positioning device for an automatic changing apparatus employing

1987-04-27

1989-02-14

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 69, 318569, 369 34, G11B 1900

Patent

active

048050490

ABSTRACT:
An automatic changing apparatus includes a holder portion for storing a number of optical disks and a carriage for transferring a desired disk in the holder portion to a disk drive device. The carriage is moved by a drive mechanism and positioned in a desired position by a positioning device. The positioning device includes an absolute encoder which operates in association with the movement of the carriage to detect the position of the carriage. The drive mechanism is driven by a driver circuit in accordance with the difference between the position detected by the encoder and a desired position supplied from an input unit.

REFERENCES:
patent: 3045157 (1962-07-01), Jacquet et al.
patent: 3093781 (1963-06-01), Anke et al.
patent: 3139570 (1964-06-01), Jacobson et al.
patent: 3701888 (1972-10-01), McDaniel
patent: 3752969 (1973-08-01), Kiffmeyer et al.

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