Record carrier and device for playing back same

Details Record carrier and device for playing back same Record carrier and device for playing back same

1975-12-15

1977-03-15

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 55, 360110, G11B 502, G11B 2102, G11B 512

Patent

active

040127770

ABSTRACT:
A recording device for storing and playing back information in which mechanical deformations which are representative of the stored information are provided in the surface of a record carrier consisting of a permanent magnetizable material or being covered with such a material. As a playback element is present a sheet of monoaxial magnetizable material which comprises a single-walled magnetic domain ("bubble"). The size of the domain is modulated upon moving the recording medium with respect to the sheet. Deposition of the domain in the sheet upon playing back can be corrected by way of fine control.

REFERENCES:
patent: 3793639 (1974-02-01), Enz et al.

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