Simplified structure of toy phonograph

Details Simplified structure of toy phonograph Simplified structure of toy phonograph

1977-10-28

1979-06-12

Aegerter, Richard E.

Undertaking

274 9R, 274 39A, G11B 300

Patent

active

041578325

ABSTRACT:
Disclosed is a simplified structure of a toy phonograph in which the output shaft of a motor is selectively put into engagement with the rim of a record disc to drive the latter. A tone arm is provided above the record disc, so that the record disc may be contacted by a stylus carried by the tone arm, when moved axially by the output shaft of the motor brought into driving engagement therewith. The motor is biased for pivotal movement into engagement with the record disc, by means of springs which are retained by terminals of the motor. The springs are made of a conductive and resilient material, for playing a role of lead wire for supplying the motor with power. The springs include a plus side and a minus side springs, one of which is adapted to be separated from the associated motor terminal in the course of the pivotal movement of the motor, to serve as a source switch. The tone arm is normally biased toward the starting point of reproduction, so as to be swung in a space between the record disc and a speaker. When the reproduction is over, the tone arm is displaced radially outwardly or inwardly of the record disc, so as to allow the axial movement of the record disc. During this axial movement the spring comes to be separated by the associated motor terminal to open the source circuit. As a manual switch is depressed, the record disc is lowered to allow the tone arm to return the central starting point of reproduction, and the spring which has been disconnected from the motor terminal is again brought into contact with the latter.

REFERENCES:
patent: 3401942 (1968-09-01), Strauss
patent: 3740056 (1973-06-01), Nuhall et al.
patent: 3823946 (1974-07-01), Nakajima

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