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Random access disk file with axial translation of disks and end plate

  • US 3,994,017 A
  • Filed: 07/01/1974
  • Issued: 11/23/1976
  • Est. Priority Date: 07/01/1974
  • Status: Expired due to Term
First Claim
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1. In a storage device:

  • a pair of parallel end plates rotating about a common axis;

    one of said plates slidably supported for reciprocating low friction displacements to said axis;

    a stack of multiple storage disks supported between said plates for co-rotation about said axis and for low friction sliding displacements parallel to said axis;

    said disks and end plates surrounded by a fluid;

    means linked directly to said one plate for reciprocally actuating said one plate for causing close and loose confinement of said disks;

    means coordinated with said actuating means for forcing edges of said closely confined disks slightly apart at a selected interface in said stack to cause partial expansion of said selected interface, associated with causing a fluid pressure difference between the selected interface and the other interfaces;

    said partial expansion insufficient for unobstructed transducing access to said disks; and

    means operable following said partial expansion for operating said actuating means to shift said one plate quickly to said position of loose confinement, whereby, due to cohesion and suction effects accompanying said shaft and due to said established pressure difference, the disks between said partially expanded interface and said one plate are shifted slidably with said one plate as a cohesive unit, thereby further expanding said selected interface sufficient for unobstructed transducing access.

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