Random access disk file with axial translation of disks and end

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

1974-07-01

1976-11-23

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 86, 360 99, 360133, G11B 5012, G11B 2302, G11B 582

Patent

active

039940179

ABSTRACT:
In a random access storage device a head transported relative to a rotating assembly of flexible disks and a pair of co-rotating end plates operates in clearance spaces formed by sliding the disks apart at a selected interface. One of the end plates is attached to a low friction spline which is quickly shiftable between predetermined axial limit positions. In the most confining position of this plate a single selected interface space between the disks is partially opened by deflection of the disks. The partial opening is sufficient to establish a pressure difference relative to the other interfaces but not enough for unobstructed entrance of the head. Shortly after formation of the partial opening the shiftable plate is actuated away from the disks in a quick movement. Due to the suction effects accompanying this movement, and the just-mentioned pressure difference, the disks between the partial opening and the shifting plate are cohesively moved away from the selected interface as a sliding unit; thereby expanding that interface sufficiently to accommodate the head.

REFERENCES:
patent: 3130393 (1964-04-01), Gutterman
patent: 3509553 (1970-04-01), Krijnen
patent: 3618055 (1971-11-01), Acker et al.

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