1978-03-20
1980-04-29
Butler, Douglas C.
Cutlery
308 77, 3081341, 308160, 308172, 308DIG1, 310 90, F16C 704, F16C 3500
Patent
active
042003440
ABSTRACT:
Drive and support structure for magnetic disc stores comprising a drive spindle which is adapted for direct connection to a disc pack, a pair of self-acting air bearings which support the spindle with its axis vertical, and an alternating current synchronous motor comprising a rotor which is connected to the spindle between the bearings and carries permanent magnets, and a stator which surrounds the rotor and produces a rotating magnetic field which interacts with magnetic poles provided at the periphery of the stator by the magnets. The air bearings are each of the inward pumping zero flow herringbone type.The upper end of the spindle is adapted for connection to a disc pack, and the weight of the spindle is supported at its lower end through a self-acting fluid thrust bearing of the grooved hydro-dynamic oil type. A cooling chamber is provided around the thrust bearing to cool recirculated oil.
REFERENCES:
patent: 3146036 (1964-08-01), Benatti
patent: 3302048 (1967-01-01), Gray
patent: 4043612 (1977-08-01), Orcutt
Binns Kenneth J.
Woolley Ronald W.
Butler Douglas C.
The University of Southampton
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