Stroboscope device on a record player

Details Stroboscope device on a record player Stroboscope device on a record player

G - Physics

01

P

73/179

G01P 3/40 (2006.01) G11B 19/28 (2006.01)

Patent

CA 1122035

9.10.78 1 PHD.77.125 "ABSTRACT": "Stroboscope device on a record player". A stroboscope device on a record player for monitoring at least two turntable speeds (33 1/3 and 45 r.p.m.), the turntable rim being provided with a single stroboscope ring for the relevant speeds and the marks of the stroboscope ring, as they pass a light pulse generator, being optically comparable with light pulse trains produced by the light pulse generator and corres- ponding to the nominal speed.

314452

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