Reproducing transducer capable of tracking control

Details Reproducing transducer capable of tracking control Reproducing transducer capable of tracking control

1977-10-11

1979-05-01

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791001B, 360 77, H04N 580, G11B 2110

Patent

active

041527275

ABSTRACT:
A reproducing transducer, in an apparatus for reproducing an information signal recorded on a track on a rotary recording medium, comprises a reproducing tracing element for tracing the track on the rotary recording medium thereby to reproduce the information signal, a cantilever supported at a proximal end thereof by way of a damper and provided at a free distal end thereof with the reproducing tracing element, a mechanism for detecting any deviation of the tracing position of the reproducing tracing element from a proper tracing position relative to the track and generating a tracking control signal in response to the deviation. A unit supplies the current of the tracking control signal to the cantilever or an electric conductor secured to the cantilever, and a permanent magnet applies a magnetic field to the cantilever or the electric conductor. The cantilever or the electric conductor undergoes a displacement within the magnetic field in response to the direction and magnitude of the tracking control signal current thus supplied, whereby the reproducing tracing element is displaced so as to trace the track in the proper tracing position and is thereby tracking controlled.

REFERENCES:
patent: 3207857 (1965-09-01), Poutot
patent: 3872241 (1975-03-01), Adler
patent: 3973080 (1976-08-01), Dickopp
patent: 4001889 (1977-01-01), Schneider
patent: 4059277 (1977-11-01), De Stephanis

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