Dynamic information storage or retrieval – Specific detail of information handling portion of system – Electrical modification or sensing of storage medium
Patent
1980-06-09
1983-01-25
Cardillo, Jr., Raymond F.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Electrical modification or sensing of storage medium
369173, G11B 906, G11B 344
Patent
active
043707394
ABSTRACT:
An improved information storage and playback system comprising a playback stylus and a disc record. The information is recorded in the surface of the disc record and there is relative motion between the disc and the playback stylus during recovery of the recorded information. The stylus is fabricated out of a dielectric support material and contacts the record disc surface during the recovery of the information. The improvement comprises employing a playback stylus whose dielectric support material is single crystal magnesium aluminate spinel. The spinel composition comprises a ratio of MgO to Al.sub.2 O.sub.3 of from about 1:1 to about 1:2.5.
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Bates Ronald F.
Pinch Harry L.
Wang Chih C.
Cardillo, Jr. Raymond F.
Lazar Joseph D.
Morris Birgit E.
RCA Corporation
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