Dynamic information storage or retrieval – Dynamic mechanism subsystem – Having power driven transducer assembly
Patent
1979-12-20
1982-01-26
Psitos, Aristotelis M.
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Having power driven transducer assembly
369 43, 369126, 3581285, G11B 1730, G11B 700, G11B 900, H04N 576
Patent
active
043131891
ABSTRACT:
In certain video disc systems it is desirable to have a stylus position sensing apparatus. An electrode secured in fixed relation to a movable stylus is disposed between first and second electrodes to form first and second variable capacitors therewith. The capacitance of the variable capacitors change relative to the motion of the stylus related electrode between the first and second electrodes. Complementary signals are applied to the first and second electrodes, which signals are coupled proportional to the respective variable capacitances to the stylus related electrode. The algebraic sum of the signals coupled to the stylus related electrode is indicative of the position of the stylus.
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Herrmann E. P.
Psitos Aristotelis M.
RCA Corporation
Tripoli J. S.
Whitacre E. M.
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