Fixed head, direct access storage device

Details Fixed head, direct access storage device Fixed head, direct access storage device

1975-01-02

1977-02-15

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 86, G11B 582, G11B 1900, G11B 2504

Patent

active

040084914

ABSTRACT:
A disk file employs a fixed magnetic head and a rotary magnetic disk that precesses about the axis of a drive motor. An escapement mechanism, that is coupled to the rotary spindle which supports the disk, is free to rotate about the motor axis, causing the disk to precess while the disk is rotating. Thus, there is relative radial movement between the precessing disk and the fixed head, enabling accessing to different data tracks.

REFERENCES:
patent: 2387010 (1945-10-01), Clausen
patent: 2546821 (1951-03-01), Hansen
patent: 2808268 (1957-10-01), Moore
patent: 3020358 (1962-02-01), Richardson
patent: 3138669 (1964-06-01), Rabinow et al.
patent: 3251952 (1966-05-01), Shomer
patent: 3361873 (1968-01-01), Johnson et al.
patent: 3391247 (1968-07-01), Frohbach
patent: 3706857 (1972-12-01), Lynott
patent: 3710357 (1973-01-01), Buslik

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