Capacitive information system

Details Capacitive information system Capacitive information system

1980-11-21

1983-02-01

Faber, Alan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Electrical modification or sensing of storage medium

369151, G11B 1106

Patent

active

043719619

ABSTRACT:
An improved information storage and recovery system comprising a playback stylus, having a dielectric support element and a conductive electrode, and a grooved conductive disc record in which information is recorded. The information is recovered on playback while there is relative motion between the record surface and the stylus by sensing capacitive variations between the stylus conductive electrode and the record surface. The improvement comprises employing that angle between the electrode face and the record surface such that the respective paths of dielectric effects between the electrode face and the record surface both in the direction of relative motion and in the direction opposite the direction of relative motion are balanced.

REFERENCES:
patent: 3842194 (1974-10-01), Clemens
patent: 3930117 (1975-12-01), Clemens
patent: 3943276 (1976-03-01), Knitter
patent: 4162510 (1979-07-01), Keizer
patent: 4273967 (1981-06-01), Wada
patent: 4296371 (1981-10-01), Keizer

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