Data security apparatus for magnetic recording disc drive

Details Data security apparatus for magnetic recording disc drive Data security apparatus for magnetic recording disc drive

1978-09-05

1980-02-12

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360137, G11B 554

Patent

active

041886488

ABSTRACT:
Apparatus for preventing unauthorized access to data recorded upon the magnetic discs of a disc drive which utilizes at least one rotating magnetic disc and at least one magnetic playback head movable relative to the axis of rotation of the disc to access data recorded on the disc includes structure selectively engageable and disengageable with the playback head for restraining the movement of the head, and locking structure for controlling the engagement and disengagement of the head movement restraining structure.

REFERENCES:
patent: 3785184 (1974-01-01), Wirth
patent: 3843967 (1974-10-01), Mulvany
patent: 3862555 (1975-01-01), Wirth
I.B.M./T.D.B. vol. 20, No. 10, Mar. 1978, pp. 4104-4105, "Removable media disc file" by Fugle et al.

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