Phonograph record player

Details Phonograph record player Phonograph record player

1980-02-14

1981-08-18

Shepperd, John W.

Dynamic information storage or retrieval

Sound reproduction for toy or novelty device

46259, 369177, G11B 302, G11B 2504

Patent

active

042842794

ABSTRACT:
A record player for use with a stationary conventional record disc having a spiral sound groove with signals recorded therein includes a freely movable body which is placed on the record disc, a drive assembly for causing the movable body to effect random movements over the record disc, a pick-up or cartridge pivotally mounted at the underside of the movable body to pivot about a pivot axis for engaging the sound groove and reproducing the signals recorded therein while tracking the spiral sound groove as the movable body travels on the record disc, and a guide assembly for controlling the travel of the movable body relative to the record disc in response to pivotal movement of the pick-up. The guide assembly includes a guide wheel disposed in advance of the pivot axis so that the guide wheel provides a radial inward force to compensate for centrifugal forces acting on the movable body in moving in a generally circular path defined by turns of the spiral sound groove.

REFERENCES:
patent: 1341102 (1920-05-01), Belknap
patent: 2236431 (1941-03-01), Hollingsworth et al.
patent: 2690626 (1954-10-01), Gay et al.
patent: 2978836 (1961-04-01), Kato
patent: 3086319 (1963-04-01), Frisbie et al.
patent: 3362716 (1968-01-01), Dunn
patent: 4166624 (1979-09-01), Mori et al.

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