Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1991-06-25
1994-03-01
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360106, G11B 1702, G11B 554
Patent
active
052913570
ABSTRACT:
A magnetic recording device exhibiting reduced electromagnetic interference has a magnetic recording medium, a spindle motor for rotationally driving the magnetic recording medium, a magnetic head for writing and/or reading magnetic information and a shifting device for shifting the magnetic head. A stator core is provided with nine pole pieces divided into three groups of adjacent pole pieces. Each group of three adjacent pole pieces is wound with one of three different 3-phase coils such that adjacent pole pieces in a group have opposite polarities relative to a rotor magnet. The magnetic head is disposed corresponding to a specific slot of a stator core in the spindle motor. A shift route thereof extends outwards virtually in the radial direction from the specific slot.
REFERENCES:
patent: 4275426 (1981-06-01), Hoffman
patent: 4359763 (1982-11-01), Hoffman
patent: 4620301 (1986-10-01), Koide
patent: 4847712 (1989-07-01), Crapo
patent: 4858044 (1989-08-01), Crapo
patent: 4873596 (1989-10-01), Harada et al.
patent: 5124863 (1992-06-01), Koizumi et al.
Nippon Densan Corporation
Renner Craig A.
Wolff John H.
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