Miniature toy sound-reproducing device

Details Miniature toy sound-reproducing device Miniature toy sound-reproducing device

1975-06-26

1977-01-25

Stephan, Steven L.

Undertaking

A63H 333

Patent

active

040048152

ABSTRACT:
A simplified sound-reproducing device including a constant-torque spiral spring for driving a turntable on which a phonograph record is irreplaceably mounted. The spiral spring is unwound as a manual pull is exerted on a string extending out of the device, and upon release of the string, is rewound to its initial configuration, thereby causing the turntable to rotate in a predetermined direction. A reproducing stylus on a pivotal pickup arm rides in the groove on the record, and the vibrations set up in the stylus and pickup arm during record rotation are directly transmitted to a diaphragm to cause the same to emanate audible sound. Measures are taken against diaphragm deformation due to heat or shock which may be caused through the pickup arm.

REFERENCES:
patent: 1979067 (1934-10-01), Franklin
patent: 3468546 (1969-09-01), Duncan et al.
patent: 3532346 (1970-10-01), Barcus et al.
patent: 3667765 (1972-06-01), Watanabe
patent: 3721449 (1973-03-01), Sirinek

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