Magnetic read head with offset flux gaps

Details Magnetic read head with offset flux gaps Magnetic read head with offset flux gaps

1975-05-19

1976-10-12

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Plural gaps

G11B 528

Patent

active

039862097

ABSTRACT:
Apparatus for increasing the density of data tracks on the recording surfaces of a disc memory of the type having at least one pre-recorded servo track which is continuously read by a servo head whose output signal changes with its position relative the track and is constantly adjusted to maintain a predetermined servo head output signal condition, without increasing the number of servo tracks in the memory. The improvement comprises a servo head having a plurality of flux paths, each passing through a signal winding, and having adjacent read gaps arranged and spaced such that by successively employing one or another of the read gaps to sense a servo track, the number of data tracks can be increased by an integer multiple. Signal winding selection apparatus is added which receives the track address from the external user, and which, dependent thereon, selects one of the signal windings and supplies its servo signal to the controller which shifts the servo arm and maintains the selected servo gap in the desired position adjacent the desired servo track.

REFERENCES:
patent: 3373416 (1968-03-01), Geurst et al.
patent: 3557445 (1971-01-01), Mizrami
patent: 3662122 (1972-05-01), Grundtner et al.

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