Microphonograph record

Details Microphonograph record Microphonograph record

1977-01-31

1981-11-03

Shepherd, John W.

Dynamic information storage or retrieval

Storage medium structure

Specified center hole or locating structure

G11B 368

Patent

active

042989760

ABSTRACT:
Microphonograph record which is to remain stationary while information is being reproduced therefrom formed from a sheet of material and having generally V-shaped locating means formed in the sheet of material which is accessible from one side of the sheet of material. The V-shaped locating means lies in a plane generally parallel to the plane of the sheet of material. The sheet of material is provided with first and second surfaces and has information carried by the sheet of material on at least one surface thereof and arranged in a generally concentric circular pattern. The circular pattern has at its center a point which lies in close proximity to the apex of the V-shaped locating means.

REFERENCES:
patent: 1150020 (1915-08-01), Ehlinger
patent: 1417339 (1922-05-01), Lenton
patent: 2486661 (1949-11-01), Leitner
patent: 3633924 (1972-01-01), Cowell et al.
patent: 3702032 (1972-11-01), Doring
patent: 3883146 (1975-05-01), Johnson et al.

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