US 4,252,327 AGranted

Video disc player

AssigneeMCA Discovision, Inc.

InventorsJames E. Elliott, Lawrence S. Canino

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Abstract

A video disc player assembly is described employing a fixed base member with a pair of fixed rails, and a movable carriage member employing a pair of linear bearing assemblies in engagement with said rails. A stabilization plate is mounted on the movable carriage for movement therewith. A motor and spindle assembly is mounted on the stabilization plate. A portion of the motor and spindle assembly extends through axially aligned apertures in the stabilization plate and carriage and carries a videodisc mounting surface coplanar with the stabilization plate. A centering means is provided to accurately center the disc about the spindle. A releasable clamp rigidly engages the spindle and holds the videodisc against the mounting surface parallel to the stabilization plate. A motor and spindle are mounted on the carriage for rotary driving of the video disc, a centering means is provided to accurately center the disc about the spindle, and a stabilization plate is provided adjacent and parallel to the rotating disc.

A videodisc player for retrieving information stored upon a rigid videodisc record, said player comprising:

a housing including fixed support means having at least one linear rail member;
a movable carriage having at least one linear bearing means in operative engagement with said rail member, said carriage being formed with an aperture;
a stabilization plate mounted on said carriage and movable therewith, said plate being formed with an aperture;
said aperture formed in said plate being in axial alignment with said aperture formed in said carriage;
means for controlling movement of said carriage with respect to said housing along said rail;
a motor and spindle assembly mounted on said stabilization plate for movement therewith;
at least a portion of said assembly extending through said aperture in said stabilization plate;
said spindle having a central axis and said assembly including means for mounting a videodisc about said spindle in a plane generally perpendicular to the axis of said spindle and parallel to said stabilization plate, said mounting means including a videodisc support ring having a generally flat surface disposed in a plane generally perpendicular to said spindle axis and arranged to abut one side of said disc, said plane flat surface of said support ring being disposed above and parallel to a surface of said stabilization plate;
said support ring being positioned within said aperture in said stabilization plate and spaced from said stabilization plate for forming an air channel;
means for centering said disc about said spindle, said centering means being disposed about said spindle and having an outer surface generally forming a frustum of a cone, which surface is arranged to engage a central aperture in said videodisc thereby centering said disc with respect to said spindle axis;
and
releasable clamping means arranged to rigidly engage said spindle and resiliently engage a second side of said disc for holding the disc against said support ring and parallel to said plate.

9 more elements

Abstract

Claims4