Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1991-08-29
1994-03-15
Dzierzynski, Paul M.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360109, 36013022, 360 75, 360 7812, G11B 555, G11B 2108
Patent
active
052950310
ABSTRACT:
Rotary positioning devices are described wherein a coil and permanent magnet combination is provided to couple a torque into a pivotally mounted arm member, the pivot of which is located substantially at the center of gravity of the assemblage. By coupling such a torque into the device to cause rotational pivotal movement, forces otherwise imposed upon the pivot and bearing structure are substantially avoided. Suited particularly for a rotary head positioning assemblage utilized with disk drives, in one embodiment, the permanent magnets are mounted with the pivoting arm for movement adjacent an energized coil structure. In another embodiment, the coils are mounted upon the pivoted arm and are moved in adjacency with spaced magnet structures. The magnet structures may be configured with slots and geometric shapes selected to achieve optimized torque developing vectors exhibiting uniformity of force application throughout the extent of pivoting of the arm assemblage.
REFERENCES:
patent: 4620252 (1986-10-01), Bauck et al.
patent: 4985652 (1991-01-01), Oudet et al.
patent: 5016131 (1991-05-01), Riggle et al.
patent: 5041935 (1991-08-01), Aruga et al.
patent: 5119253 (1992-06-01), Kotani
patent: 5161077 (1992-11-01), Jabbari
patent: 5168184 (1992-12-01), Umehara et al.
Patent Abstracts of Japan, vol. 14, No. 255 (E-935), May 31, 1990.
JP-A-2074143 (Fujitsu, Ltd.) Mar. 14, 1990-Abstract Research Disclosure, vol. 308, No. 92, Dec. 1989.
New York US-Anonymous "Balanced and Coupled Dual Voice Coil Motor Design", whole document, IEEE transactions on Magnetics, vol. MAG-7, No. 4, Jul. 1981.
"Mechanical and Servo Design of a 10 Inch Disk Driv" by Mizoshita et al.
Chu Kim-Kwok
Dzierzynski Paul M.
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