R/W Arm that prevents catastrophic failure

Details R/W Arm that prevents catastrophic failure R/W Arm that prevents catastrophic failure

1978-05-22

1979-11-20

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 99, 3601301, G11B 554

Patent

active

041752759

ABSTRACT:
In a flexible magnetic disk file having one or more flexible disks mounted for rotation about a centrally located axis, data on a selected disk is transduced by a magnetic head seated on a fail-safe head arm support. The head arm support is a relatively flat elongated member mounted at one end to a carriage assembly. The head arm support has a smooth contour with relatively sharp edges about its periphery and a spherical enclosure seated on its free end. The head arm support is tapered, at a predetermined angle from the rigidly mounted end towards the free end. The angle of taper allows for automatic ejection of the head arm support from the disk file during inadvertent closure of the disk file. The relatively sharp edges allow the head arm support to open a closed disk file.

REFERENCES:
patent: 3579213 (1971-05-01), Applequist
patent: 3713121 (1973-01-01), Fasano
patent: 3931641 (1976-01-01), Watrous
patent: 3940794 (1976-02-01), Griffiths et al.
patent: 3975769 (1976-08-01), King
patent: 3990109 (1976-11-01), Seifert
IBM/TDB, vol. 18, No. 10, Mar. 1976, p. 3366, "Two-Contour Knife and Head Combination for Flexible Disk Access", by McGinnis et al.
IBM/TDB, vol. 18, No. 12, May 1976, pp. 4126-4127, "Actuator for Magnetic Disk . . . ", by Wanek.
IBM/TDB, vol. 18, No. 10, Mar. 1976, pp. 3435-3436, "Disk File Actuator", by Dickie, et al.

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