Disc master positioning apparatus for a recording system

Details Disc master positioning apparatus for a recording system Disc master positioning apparatus for a recording system

1976-06-30

1977-08-02

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

274 39R, 1791001B, 360 97, 360 86, 1791004C, 1791003V, G11B 362, H04N 576

Patent

active

040400891

ABSTRACT:
A turntable has a central opening in which a centering spindle is snugly received for a reciprocal motion along the axis of rotation of the turntable. The centering spindle has a tapering end for engagement with walls defining a central aperture of a disc master in order to center the disc master relative to the turntable. A spring, located in the turntable central opening, biases the centering spindle in a direction such that the tapering end of the centering spindle, in engagement with the walls defining the central aperture of the disc master, urges the disc master against engaging ends of locating members, secured to the peripheral portion of the turntable, to locate a surface of the disc master in a recording plane defined by the engaging ends of the locating members. The locating members selectively occupy positions permitting installation and removal of the disc master.

REFERENCES:
patent: 2937916 (1960-05-01), Hohnecker
patent: 3120991 (1964-02-01), Newberry
patent: 3815146 (1974-06-01), Nash
patent: 3842217 (1974-10-01), Clemens
patent: 3980308 (1976-09-01), Camerik
patent: 4010318 (1977-03-01), Riddle

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