G - Physics – 11 – B
Patent
G - Physics
11
B
179/23, 352/33
G11B 3/10 (2006.01) G11B 3/06 (2006.01) G11B 3/38 (2006.01) G11B 19/20 (2006.01)
Patent
CA 1194996
ABSTRACT OF THE DISCLOSURE Means for reducing the effects of vertical perturbations of a phonograph disc surface resulting from disc and/or playback system mechanical imperfections. Such imperfections are compensated by closed loop and/or open loop means wherein the deviations of the record path are detected and employed to minimize the effects of the mechanical imperfections.
395295
Dolby Ray M.
Fetherstonhaugh & Co.
LandOfFree
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