The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 1979
Filed:
Oct. 11, 1977
Kazuo Tatsuguchi, Yokohama City, JP;
Hisao Kinjo, Yokohama City, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
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.