Automatic record player

Details Automatic record player Automatic record player

1980-11-28

1983-03-08

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Access of multiple storage elements

369243, G11B 1704

Patent

active

043763057

ABSTRACT:
An extremely simple record changer mechanism is provided wherein only two members interconnect the tone arm subassembly with the main cycling gear in the spindle area of the changer. One of these members is employed to lift and lower the tone arm and the other member is used for the dual purpose of moving the tone arm horizontally during the record changing cycle and also acts as a velocity trip actuating member during the playing cycle. Both members are designed to avoid damage to the mechanism if the tone arm is moved or restrained during the record changing cycle. The presence or absence of a record on the spindle shelf is sensed by blade means which is moved in the direction of the shelf during the initial portion of the record changing cycle. If no record is present on the shelf, the tone arm is lowered into engagement with a retaining notch on the rest post at a point somewhat before mid cycle and the turntable motor is turned off at the end of this last record shutoff cycle.

REFERENCES:
patent: 3400935 (1968-09-01), Kolomayets et al.
patent: 3650539 (1972-03-01), Vazzano
patent: 3827698 (1974-08-01), Sostero
patent: 3853326 (1974-12-01), Atsumi

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