Phonograph for a record disk having a plurality of sound grooves

Details Phonograph for a record disk having a plurality of sound grooves Phonograph for a record disk having a plurality of sound grooves

1988-07-08

1989-03-07

Stephan, Steven L.

Dynamic information storage or retrieval

Sound reproduction for toy or novelty device

Indexing to track

369 67, A63H 333, G11B 300, G11B 1920

Patent

active

048113220

ABSTRACT:
An index portion of a record disk unit is formed by cutting out a portion of a flange which is formed continuously along a peripheral edge of the record disk unit. When one of selection rods is pushed against a spring which urges the selection rod in a retreating direction, to rotate a stylus presssure release actuating wheel, an engaging member, formed on the selection rod, is elastically deformed by the edge of the flange and rides over the flange into engagement therewith. When the index portion of the record disk unit comes around to a position coincident with the engaging member, the engaging member is allowed to pass through the cut-out portion of the index portion, to thereby return the selection member to its original position by a spring force to be applied a stylus pressure on a pickup.

REFERENCES:
patent: 3712629 (1973-01-01), Watanabe
patent: 4482990 (1984-11-01), Koike
patent: 4694445 (1987-09-01), Koike

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