Simplified sound reproducing device

Dynamic information storage or retrieval – Sound reproduction for toy or novelty device – Indexing to track

Patent

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Details

369 67, G11B 2710, G11B 378, G11B 1700

Patent

active

045478732

ABSTRACT:
A simplified sound reproducing device having a record disc 5 having a plurality of record grooves is driven by a constant torque spring motor 2. A turntable 3 and the record disc 5 are frictionally assembled so that relative slippage occurs between them in the direction of their rotation when an extra force is applied to the system. A sound reproducing member 10, applying a stylus pressure to a pickup 6, has a holding piece attached thereto which contacts the reverse face of the record disc 5 and stops its rotation when the sound transmitting member 10 is lifted up by tension exerted by a stretched pull string 14, when the string 14 is pulled to wind the constant torque spring motor. By virtue of this construction, the angle of rotation of the turntable 3 and the record disc 5, are shifted from each other so that the introductory part of the record groove, next to the one just completed, can be placed under the pickup 6 now returned to the starting point of sound reproduction, and played.

REFERENCES:
patent: 3636655 (1972-01-01), Porter et al.
patent: 3658346 (1972-04-01), Stern et al.
patent: 3774914 (1973-11-01), Porter et al.
patent: 4404667 (1983-09-01), Koike
patent: 4433404 (1984-02-01), Watanabe

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