Video disc pickup apparatus

Details Video disc pickup apparatus Video disc pickup apparatus

1977-09-02

1979-08-14

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

17910041G, 274 38, 1791001B, H04N 576

Patent

active

041647556

ABSTRACT:
A novel pickup stylus includes a tapered diamond support element having a plurality of conical portions in the region of its tip, which conical portions have a common axis. Two of the conical portions are separated by an electrode bearing surface. The angle of inclination of the electrode bearing surface with the stylus axis is not less than the angle included between the conical portions and the stylus axis. A record engaging surface is provided in the tip region substantially orthogonal to the electrode bearing surface such that the two surfaces intersect each other along a line substantially perpendicular to the stylus axis. The perpendicular line forms the base of a stylus footprint disposed in the plane of the record engaging surface. The diamond support element includes a pair of converging flat surfaces in the tip region which are disposed such that the intersection of the converging flat surfaces with the record engaging surface defines the side edges of the stylus footprint and the intersection of the converging flat surfaces with a conical portion remote from the electrode bearing surface forms a prow of the diamond support element. The electrode bearing surface of the diamond support element is covered with a metallic layer to form a stylus electrode. The stylus is mounted such that during playback, the stylus axis is disposed at an angle to the record surface, and such that, during playback, the motion of the record is from the stylus support element toward the stylus electrode.

REFERENCES:
patent: 1966873 (1934-07-01), Sochor
patent: 2544495 (1951-03-01), Franz
patent: 2572426 (1951-10-01), Andrews
patent: 3774918 (1973-11-01), Shibata
patent: 3842194 (1974-10-01), Clemens
patent: 3943276 (1976-03-01), Knitter
patent: 4031546 (1977-06-01), Leedom

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