Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1998-03-06
1999-12-21
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
310 51, G11B 1702, H02K 524
Patent
active
060057491
ABSTRACT:
A magnet is provided which holds spherical balancers in the central portion of a rotor when the rotation of the rotor is stopped. When rotations of the rotor is started, a larger torque T.sub.0 is transmitted from the rotor to the balancers. Thus, the balancers quickly start rotating. When the rotor rotates at high speed, the centrifugal force separates the balancers from the magnet and moves the same to the outer wall portion of the rotor. At this time, a torque T.sub.0 which is transmitted from the rotor to the balancer is reduced so that the balancers are moved in the circumferential direction. Thus, the automatic aligning operation is performed. The number (n) of the balancers is made to be a value obtained by the following equation:
REFERENCES:
patent: 3109321 (1963-11-01), Rogers
patent: 3282127 (1966-11-01), Deakin
patent: 3733923 (1973-05-01), Goodrich et al.
patent: 3854347 (1974-12-01), Hellerich
patent: 4653169 (1987-03-01), Puszakowski
patent: 4674356 (1987-06-01), Kilgore
patent: 5256037 (1993-10-01), Chatelain
patent: 5391952 (1995-02-01), Simazu et al.
Ikuta Hiroshi
Nakahara Toru
Shishido Yuji
Sudo Fumiharu
Ueno Mitsuhiro
Castro Angel
Kananen Ronald P.
Sony Corporation
Wolff John H.
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