Disc drive cartridge including magnetic bearings

Details Disc drive cartridge including magnetic bearings Disc drive cartridge including magnetic bearings

1996-09-16

1998-09-15

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 555

Patent

active

058088393

ABSTRACT:
A disc drive cartridge is disclosed comprising a central actuator arm pivot hub mounting one magnetic pole, which in turn rotates within and overlaps a u-shaped upright base and sleeve supporting a second non-aligned magnetic pole. The system relies on the radial repulsive forces of the separate magnetic poles to achieve significant radial stability; in certain embodiments, attractive forces between axially aligned magnetic poles or a magnetic pole and a sleeve of high permeability magnetic material are also utilized to enhance the axial stability of the system. The rotating hub supports on one side one or more actuator arms and on the other side a coil of a voice coil motor, so that this magnetic bearing can be the central pivot for a very small compact and low noise disc drive cartridge.

REFERENCES:
patent: 5012359 (1991-04-01), Kohno et al.
patent: 5041935 (1991-08-01), Aruga et al.
patent: 5050026 (1991-09-01), Goss
patent: 5152679 (1992-10-01), Kanemitsu et al.
patent: 5541460 (1996-07-01), Dunfield et al.
patent: 5561335 (1996-10-01), Dunfield et al.
patent: 5598048 (1997-01-01), Dunfield et al.

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