Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1979-08-06
1982-05-18
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 98, 360133, G11B 582, G11B 2504
Patent
active
043308031
ABSTRACT:
A disk accessing apparatus and method are disclosed for creating an axial spacing between two adjacent disks of a rotating disk stack. The accessing apparatus is mechanical and operates from one end of the stack of disks with one portion of the apparatus being movable axially with respect to the stack of disks and received within central apertures of the disks to contact at least one disk thereat and move the contacted disk axially away from an adjacent disk to create a transducer access opening therebetween. The apparatus can have a variety of configurations including utilization of axially displaceable disk engaging tumblers and/or pins axially movable through apertures or offsets at the central portion of the disks, fingers axially movable to engage disk tabs within the central apertures of the disks, and/or disk actuating, rotatable screw threaded shafts. Latching mechanisms are also disclosed to lock the apparatus to maintain a transducer access opening then established, and a self-centering disk drive and support configuration is disclosed to maintain concentricity despite wear between contacting parts imparting rotation to the disks.
REFERENCES:
patent: 3994017 (1976-11-01), Barkhuff et al.
patent: 4118746 (1978-10-01), Gyi et al.
patent: 4134143 (1979-01-01), Ragle et al.
patent: 4143408 (1979-03-01), McGinnis et al.
patent: 4149207 (1979-04-01), Porter Jr. et al.
patent: 4167029 (1979-09-01), Ragle et al.
patent: 4191981 (1980-03-01), Van Winkle
patent: 4214286 (1980-07-01), Ragle et al.
patent: 4237503 (1980-12-01), Ragle
International Business Machines - Corporation
Somermeyer Herbert F.
Wolff John H.
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