Reproducer capable of changing a reproducing speed in...

Details Reproducer capable of changing a reproducing speed in... Reproducer capable of changing a reproducing speed in...

2005-05-24

2005-05-24

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S047380, C369S264000

Reexamination Certificate

active

06898165

ABSTRACT:
A reproducer can enhance detection accuracy with respect to a rotational motion according to a scratch operation and properly change a reproducing speed of a recording medium. A turntable of a scratch operating part comprises a disk-shaped mounting plate, which is made from metal, fixed on the upper end of a bushing, a ring-shaped grooved member fixed on a marginal area of the under surface of the mounting plate with mounting bolts, and a marginal member fixed on an outer area of the ring-shaped grooved member. A disk has a disk surface on rollers provided on the top surface of the turntable and a ring-shaped detected part located around an outer circumference of the disk surface and projecting from the under surface of the disk. A light receiving element supplies a signal with a frequency proportional to a period in which a concave part and a convex part pass according to the rotational speed of the disk. Since the rotational speed of the disk operated by an operator can be directly detected, it is possible to enhance detection accuracy.

REFERENCES:
patent: 5602812 (1997-02-01), Miura et al.
patent: 2000-182318 (2000-06-01), None

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