Narrow track magnetic-head recorder

Details Narrow track magnetic-head recorder Narrow track magnetic-head recorder

1976-10-04

1978-07-18

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Head

Read only detector using light for reading magnetically...

360 18, 360135, G11B 532, G11B 1110

Patent

active

041019474

ABSTRACT:
Information is recorded on a magneto-optic medium having a predominant proportion of preferred domain orientations with a substantial component normal to a recording surface thereof, by using a fringe field component from a magnetic-head. At least one magnetic head is utilized and such head is passed over the medium in a predefined track pattern which incorporates substantial overlapping of adjacent track portions. With such overlapping, only a residual portion of a track as originally laid down remains unerased in the final recording, and such residual portion is narrow in relation to head width. A high-resolution optical playback device is then preferably employed to extract the recorded information from the compact residual track.

REFERENCES:
patent: 2968799 (1961-01-01), Smith
patent: 3474431 (1969-10-01), Griffiths
patent: 3513456 (1970-05-01), Nelson
patent: 3624622 (1971-11-01), Chen
patent: 3629517 (1971-12-01), Grimm
patent: 3668332 (1972-06-01), Anderson
patent: 3668671 (1972-06-01), Everett et al.
patent: 3701846 (1974-10-01), Zenzefilis
patent: 3739362 (1973-06-01), Eschelbach
patent: 3781905 (1973-12-01), Enrique et al.
patent: 3925816 (1975-12-01), Kihara

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