Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1991-06-10
1993-09-21
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360 9701, G11B 555
Patent
active
052474100
ABSTRACT:
A magnetic disk apparatus includes a magnetic disk, a magnetic head which performs information recording and reproducing for the magnetic disk, a load spring for supporting the magnetic head, a head arm for fixing the load spring, a housing for housing these components, a shaft which fixes the head arm, bearings for supporting the shaft rotatably on the housing, and a motor which is coupled to the shaft. The motor comprises a motor cover, a permanent magnet which is divided into a plurality of segments and fixed on the shaft, and a coil which is fixed on the interior surface of the motor cover by being spaced with a certain gap from the permanent magnet. The shaft is included with a counter weight so as to complement the weight of the head arm, load spring and magnetic head. The coil has linear conductor sections parallel to the shaft, with the total number of linear sections being set equal to the total number of segments of permanent magnet.
REFERENCES:
patent: 4352133 (1982-09-01), Hager
patent: 4398167 (1983-08-01), Dickie et al.
patent: 4916342 (1990-04-01), Hirano et al.
patent: 5016131 (1991-05-01), Riggle et al.
patent: 5027242 (1991-06-01), Nishida et al.
Ebihara Susumu
Hirano Yoshiyuki
Matsumoto Masaaki
Mori Kenji
Naruse Jun
Hitachi , Ltd.
Wolff John H.
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