Disk positioning and ejection device in a disk drive

Details Disk positioning and ejection device in a disk drive Disk positioning and ejection device in a disk drive

1976-04-21

1977-08-02

Konick, Bernard

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

274 9B, G11B 1704

Patent

active

040401073

ABSTRACT:
A flexible disk is automatically coupled to a drive spindle following insertion in the drive, but decoupled and ejected on command. The positioning and ejection control runs through a three-phase cycle which halts at the end of the positioning phase and is terminated at the end of the ejection phase while disk de-coupling and ejection phases follow directly. The ejection device has an override if an obstacle holds the disk in the drive. The three-phase cycle is cam-operated, using a motor drive cam assembly whose shaft extends in the direction of disk insertion and ejection and parallel to the hinge axis of a cam-operated disk positioning hub carrier. A cam pin on the shaft actuates the disk ejection and additional cams control stop switches for the motor.

REFERENCES:
patent: 3890643 (1975-06-01), Dalziel
patent: 3940793 (1976-02-01), Bleiman

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