Memory storage apparatus having improved housing and base plate arrangement
AssigneeAtasi Corporation
InventorsStanley F. Brown, Garold W. Plonczak
Life of this patent
Estimating the term…
Abstract
A fixed disc drive type of memory storage devices includes an annular elastomeric pad that is engaged between the actuator base plate and a bowl-shaped lower casing. The pad is concentric with the spindle axis and forms an air-tight seal at the edge of a circular opening in the lower casing that prevents dust from entering the housing. The base plate has a circular platform portion with the hub for the spindle shaft being formed at its center. The circular form of the opening and platform portion are such that any temperature differential across the lower housing induces an oil-scanning type of deformation in the base plate so that the spindle does not tilt relative to the plane of motion of the transducers.
Claims15
A rotating disc memory storage apparatus comprising:
- an apparatus housing including a top cover, surrounding side walls and a bottom housing wall portion;
- said bottom housing wall portion having a circular opening therein;
- an electric motor including a stator and rotor;
- a spindle shaft operatively connected to the motor;
- a base plate within said housing and including an annular platform portion having hub means at its center for receiving said spindle shaft so that the spindle shaft may be rotated about an axis that is perpendicular to said platform portion;
- means for mounting the base plate to the housing wall portion so that said hub means is concentrically disposed within said circular opening formed in the housing wall portion and the base plate and the housing wall portion are in firm air-tight sealing engagement;
- means for operatively connecting the motor to the base plate and the spindle shaft to rotate the spindle shaft when the motor is energized;
- at least one disc operatively mounted to the spindle shaft so that the disc rotates in a plane that is coaxial with and normal to the spindle shaft;
- at least one transducer mounted on a carriage within said housing for accessing data recorded in the disc;
- and
- actuator means mounted to the base plate at a position remote from the spindle shaft for moving said carriage and translating the transducer along the disc to selected track locations thereon.
An improved memory storage apparatus including a housing, an actuator base plate assembly mounted within the housing, the actuator base plate assembly including a carriage, at least one transducer mounted in spaced apart relationship to the carriage, and electromagnetic means for reciprocating the carriage, a spindle motor mounted to the acuatator base plate assembly, at least one disc operatively connected to the motor within the housing, said at least one disc being secured in axially-spaced parallel relationship, with the said at least one transducer being mounted to the carriage so that upon reciprocation of the carriage they said at least one transducer is moved to desired track locations on the surfaces of the discs, wherein the improvement comprises:
- said housing including a casing having circular opening formed therein, a base plate, the base plate including an annular platform portion and means mounted to the periphery of said annular platform portion for receiving the actuator assembly, said at least one disc being operatively connected to a spindle shaft, boss means mounted to said platform portion for rotatably receiving the spindle shaft so that the shaft rotates about an axis that is perpendicular to and located at the center of the platform portion, and means for mounting the base plate within the housing so that said axis of rotation is centered within said housing opening, the diameter of the opening being smaller than the diameter of the platform portion to thus expose an annular area of the platform portion to an environment external of said housing.
A rotating disc memory storage apparatus comprising:
- an apparatus housing including a top cover, surrounding side walls and a bottom housing wall portion;
- said bottom housing wall portion having an opening therein;
- a planar base plate including a hub extending perpendicularly from said base plate, said base plate being resiliently mounted in said housing to said bottom housing wall portion and said hub being aligned with said bottom housing wall portion opening;
- means for mounting a rotating disc spindle in said hub;
- a motor having a stator and rotor;
- means for fixedly mounting the motor stator adjacent said opening;
- means for rotatively connecting the motor rotor to said spindle;
- means to mount at least one information storage disc on said spindle in said housing;
- a transducer-carrying actuator in said housing for accessing said at least one disc to read-write information on said disc;
- and
- means on said base plate for mounting said actuator at the radially periphery of said at least one disc.
Dependencies are inferred from the claim text.