1974-01-09
1977-09-20
Stephan, Steven L.
Undertaking
G11B 1716
Patent
active
040492788
ABSTRACT:
An automatic record changer is provided in which either 7-inch records or 12-inch records are supported at the edge thereof by an adjustable platform and at the center by a flat blade spindle having no moving parts, the platform being moved bodily toward the spindle in either the 7-inch or 12-inch position thereof to eject the bottom record from the flat blade spindle. The speed of the turntable is adjusted to 45 rpm in response to the positioning of a large hole record spindle at the center of the turntable in place of the flat blade spindle. Provision for automatic shut off is made either substantially instantaneously in response to movement of the tone arm beyond the rest post position during a playing cycle or at the end of an automatic record changing cycle if the control knob is turned to OFF during a record changing cycle.
A spindle stub is provided at the center of the turntable which may be adjusted vertically to provide a manual speed control for the turntable, this stub also acting as a centering spindle stub for automatic playing of a single record which is deposited manually on the turntable with automatic shut off after the single record has been played once. In the alternative, the single record may be played repeatedly in response to the positioning of a hold down arm in a repeat play position.
REFERENCES:
patent: 2293212 (1942-08-01), Offen
patent: 2549246 (1951-04-01), Schweitzer
patent: 2578378 (1951-12-01), Stolberg
patent: 2640703 (1953-06-01), Smith
patent: 2651523 (1953-09-01), Dale
patent: 2657060 (1953-10-01), Lapisl
patent: 2661216 (1953-12-01), Mills et al.
patent: 2803465 (1957-08-01), Dobrogowski et al.
patent: 3220735 (1965-11-01), Beugin
patent: 3408081 (1968-10-01), Dennis
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