Manual scanning mechanism for video disc player

Details Manual scanning mechanism for video disc player Manual scanning mechanism for video disc player

1978-11-29

1980-10-14

Shepperd, John W.

Undertaking

G11B 1706

Patent

active

042276993

ABSTRACT:
A video disc player includes a turntable for centering and rotatably supporting a record for playback. A pickup stylus for recovering information stored on a turntable-supported record is mounted in a compartment provided in a carriage. A common drive belt is provided for selectively translating the carriage. The player is equipped with a first drive mechanism for utilizing the common drive belt for translating the carriage during playback toward the turntable center at a speed correlated to the speed of rotation of the turntable while stylus/record engagement is permitted. A second drive mechanism is employed for utilizing the common drive belt for translating the carriage during active searching toward and away from the turntable center at a speed independent of the speed of rotation of the turntable while the stylus is riding on the record. The first drive mechanism includes a slip clutch interposed between the common drive belt and the turntable drive motor, whereby wresting of control of the common drive belt by the second drive mechanism from the first drive mechanism is allowed by the slip clutch upon activation of the second drive mechanism.

REFERENCES:
patent: 2866647 (1958-12-01), Somers
patent: 3380743 (1968-04-01), Miner et al.
patent: 3767848 (1973-10-01), Schuller et al.
patent: 3870320 (1975-03-01), Torrington
patent: 3870835 (1975-03-01), Stave
patent: 3973080 (1976-08-01), Dickopp et al.
patent: 3993316 (1976-11-01), Fairbanks

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