Method of writing addresses on a magnetic recording medium

Details Method of writing addresses on a magnetic recording medium Method of writing addresses on a magnetic recording medium

1977-02-02

1979-04-24

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 48, 360 49, G11B 2110, G11B 509

Patent

active

041515714

ABSTRACT:
Binary coded address information is written by a magnetic head on a magnetic recording medium, such as a disc, as a plurality of tracks, each having an address associated with it. Each track includes a reference zone containing a plurality of individual cells equal to the number of bits in the address. Each cell represents a binary value and includes two binary state transitions, each of which can occur at one of only two positions. One transition of each cell in each zone occurs at the same position within the cell, with adjacent zones having alternating positions of this transition. The other transition in the cells in each zone occurs at either position to represent the binary values.

REFERENCES:
patent: 2887674 (1959-05-01), Greene
patent: 3281806 (1966-10-01), Lawrance
patent: 3812533 (1974-05-01), Kimura et al.
patent: 3924268 (1975-12-01), McIntosh et al.
patent: 3936876 (1976-02-01), Taylor
patent: 3994016 (1976-11-01), Moghadam
patent: 4027338 (1977-05-01), Kril
patent: 4032915 (1977-06-01), Shanks et al.

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