Disc reproducing system for compensating mechanical...

Details Disc reproducing system for compensating mechanical... Disc reproducing system for compensating mechanical...

G - Physics

11

B

179/23, 179/5, 3

G11B 17/00 (2006.01) G11B 3/10 (2006.01) G11B 3/60 (2006.01) G11B 19/20 (2006.01)

Patent

CA 1147268

Abstract of the Disclosure The invention disclosed is primarily concerned with reducing the effect of spurious vertical deviations in the groove of a phonograph disc which result principally from record warp. Such imperfections can cause significant degradation of the reproduced signal. The playback apparatus of the invention comprises a turntable and cartridge and a sensor which senses vertical deviations of a disc on the turntable. The sensor controls the operation of an actuator which moves the disc in a direction to eliminate vertical deviation of the disc at the cartridge. According to a preferred arrangement the sensor senses vertical deviation of the disc in close proximity to the cartridge and with respect to a vertically fixed reference.

317805

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