Magnetic disc, especially a flexible magnetic disc, for track ad

Dynamic magnetic information storage or retrieval – Record medium – Disk

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360 77, G11B 2110

Patent

active

040842010

ABSTRACT:
The invention relates to a magnetic disc for track adjustment and amplitude control having at least one control track with magnetic control signals, this track being arranged in the central region of the recording area, and the control signals consisting of two different signals. The invention also relates to the geometric arrangement of the control signals in the track, their number, their amplitude, their frequency and their duration.

REFERENCES:
patent: 3479664 (1969-11-01), Stuart-Williams et al.
patent: 3742470 (1973-06-01), Ha et al.
patent: 3900888 (1975-08-01), Uchikoshi et al.
patent: 3914793 (1975-10-01), Burnham
patent: 3919697 (1975-11-01), Walker
IBM Tech. Discl. Bulletin, vol. 17, No. 4, Sept. 1974, "Track Following Servo Indicator", by B. C. Fiorino.

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