Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1975-11-04
1977-03-08
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 98, 360135, G11B 582, G11B 554, G11B 2504
Patent
active
040115909
ABSTRACT:
A hollow tubular actuator device operates through an enclosure formed by aligned holes in multiple floppy type storage disks. The disks, separated by interposed ventilating spacers, are clamped between inflexible end plates in a closely spaced continually rotating stack assembly. The actuator preferably rotates with the stack and translates axially relative to the disks and spacers. The actuator has a slotted opening for transmitting variable pressure to a selected spacer (address) in the stack and thereby varies the aggregate pressure equilibrium in the stack due to centrifugal air flow. This acts to deflect the orbits of disks peripherally, on either side of the selected address space, forming a gap useful for obtaining external access to otherwise inaccessible storage surfaces adjacent the selected space.
REFERENCES:
patent: 3509553 (1970-04-01), Krijen
patent: 3867723 (1975-02-01), Penfold et al.
patent: 3936880 (1976-02-01), McGinnis et al.
patent: 3940794 (1976-02-01), Griffiths et al.
B484,482, Mar., 1976, Barkhuff et al., 360/98.
Eddleman Alfred H.
International Business Machines - Corporation
Lieber Robert
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