Dynamic information storage or retrieval – Dynamic mechanism subsystem – Having power driven transducer assembly
Patent
1981-10-08
1984-01-31
Stephan, Steven L.
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Having power driven transducer assembly
369 43, 369147, 369152, 369221, 369222, 369251, G11B 310, H04R 916
Patent
active
044293798
ABSTRACT:
Moving coils of a phonograph pickup are made of a substance having magnetoresistance so that the electrical resistance of the coils are detected by means of bridge circuits. The amounts of resistance variation of the coils are used to produce a vertical component output signal and a horizontal component output signal which respectively indicate the vertical and horizontal displacements of the coils from its optimum operating point with respect to the magnetic field of the pickup. The vertical and horizontal component output signals are used to control vertical and horizontal control motors which correct the attitude of the tone arm so that the moving coils are accurately positioned at the optimum operating point irrespective of the warp and/or eccentricity of the phonograph disk.
REFERENCES:
patent: 4102536 (1978-07-01), Clunis
patent: 4105961 (1978-08-01), Plummer et al.
patent: 4209670 (1980-06-01), Ona et al.
patent: 4301528 (1981-11-01), Leri
Radio Shack Dictionary of Electronics, 1974-1975, p. 344.
McGraw-Hill Dictionary of Scientific and Technical Terms, 1974, p. 893.
McGuire et al., Anisotropic Magnetoresistance in ferromagnetic Alloys, IEEE Transactions on Magnetics, vol. Mag-11, No. 4, Jul. 1975, pp. 1018-1038.
Oguri Katsuhiko
Sato Kazuhiro
Stephan Steven L.
Victor Company of Japan , Limited
LandOfFree
Device for controlling tone arm carrying moving coil type pickup does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for controlling tone arm carrying moving coil type pickup, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for controlling tone arm carrying moving coil type pickup will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2349180