Stylus shift mechanism for a phonograph having two concentric re

Details Stylus shift mechanism for a phonograph having two concentric re Stylus shift mechanism for a phonograph having two concentric re

1976-07-16

1978-02-28

Stephan, Steven L.

Undertaking

274 13A, 274 42R, G11B 334, G11B 380

Patent

active

040762564

ABSTRACT:
A toy phonograph of the type having an annular outer record, and an inner record arranged concentrically inwardly of the outer record for simultaneous rotation therewith, with the outer record having its grooved top surface disposed slightly higher than that of the inner record. For shifting a reproducing stylus from the outer to the inner record across a spacing therebetween during playback, a shift stylus is carried by a pickup arm at the rear of the reproducing stylus. Shorter than the reproducing stylus, the shift stylus is adapted to ride in a groove in the outer record to permit the reproducing stylus to be carried across the spacing between the records by the pickup arm. The reproducing stylus engages and starts following a groove in the inner record as the shift stylus leaves the outer record.

REFERENCES:
patent: 671513 (1901-04-01), Goald
patent: 2680150 (1954-06-01), Weld
patent: 3581410 (1971-06-01), Zeigner
patent: 3801110 (1974-04-01), Licitis

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