Simplified acoustic playback apparatus

Details Simplified acoustic playback apparatus Simplified acoustic playback apparatus

1989-07-31

1992-04-07

Shoop, Jr., William M.

Dynamic information storage or retrieval

Sound reproduction for toy or novelty device

With beginning or end of cycle stylus return

369 63, 369 65, G11B 1706

Patent

active

051034425

ABSTRACT:
A simplified acoustic disk record playback apparatus is disclosed having a battery-powered motor driving a turn table through a belt and pulley system. The turn table is centrally mounted on a rotating shaft. Overlying the turn table is a disk record which may have a plurality of grooves starting on its periphery. The turn table is spring biased towards a tone arm and associated record pickup stylus. The tone arm pivots horizontally, parallel to the plane of the disk record, but is held vertically by an overlying speaker cone, and is spring biased to a beginning playback position. The tone arm carries a center gear locking member on that side proximal to the turn table rotating shaft. A center gear is mounted on the turntable rotating shaft coplanar with the tone arm. Located on the turn table center, or rotating, shaft beneath the center gear is a two piece can assembly which lengthens when twisted. As the tone arm reaches the end of the disk record playback, the center gear locking member locks the center gear to stop the rotation of half the cam assembly, subjecting the cam to twisting and lengthening, thereby countering the spring bias of the turn table and allowing the tone arm to return to a playback position.

REFERENCES:
patent: 3784211 (1974-01-01), Summerfield
patent: 4486871 (1984-12-01), Koike
patent: 4510590 (1985-03-01), Girton et al.
patent: 4622658 (1986-11-01), Koibe
patent: 4680747 (1987-07-01), Blake, III
patent: 4694446 (1987-09-01), Koike
patent: 4800305 (1989-01-01), Koike
patent: 4811322 (1989-03-01), Koike et al.
patent: 4827465 (1989-05-01), Koike

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