Video disc pickup with preplay stylus

Details Video disc pickup with preplay stylus Video disc pickup with preplay stylus

1978-09-11

1979-03-20

Wolff, John H.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

17910041S, G11B 380

Patent

active

041457188

ABSTRACT:
A composite stylus assembly, provided for a system for playing back a grooved disc record, includes an L-shaped leaf spring support member formed of a longitudinal piece and a short transverse piece. The transverse piece is attached near the free end of a pickup arm of the system such that the longitudinal piece will be substantially parallel to the pickup arm. The pickup arm is supported in a cartridge adapted for reception within a carriage of the system such that during record playback, the longitudinal piece will lie between the pickup arm and the center of a turntable of the playback system. A playback stylus, subject to engagement with the groove of a video disc record supported on the turntable, is carried at the free end of the pickup arm, while a pre-play stylus, subject to simultaneous engagement with several convolutions of the groove of the disc record, is carried at the free end of the longitudinal piece.

REFERENCES:
patent: 2754372 (1956-07-01), Weathers
patent: 3185485 (1965-05-01), Brubaker
patent: 3572725 (1971-03-01), Murphy
patent: 3817538 (1974-06-01), Jenrick
patent: 3822065 (1974-07-01), Arbib
patent: 3872241 (1975-03-01), Adler
patent: 3956581 (1976-05-01), Taylor

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