Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1993-03-02
1994-04-19
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9701, 360 9807, 360 9908, G11B 1702
Patent
active
053051637
ABSTRACT:
A stationary spindle shaft assembly supports and controllably rotates a disc pack within the housing of a magnetic disc drive. The shaft assembly includes an elongate spindle shaft fixed with respect to the drive housing, and a stator surrounding and integral with the spindle shaft. A centered, axial bore in the spindle shaft is open to one end of the spindle shaft to receive a bundle of electrically conductive lines for mechanical and electrical coupling to the stator through a printed circuit. A pair of radial apertures are formed in the shaft near the inward end of the axial bore. Each aperture is open to the bore and to the spindle shaft exterior, and accommodates approximately one-half of the conductive lines as they extend from the bore to the stator. The radial apertures are spaced apart from one another 180 degrees, such that a selected axial plane bisecting the shaft also bisects each of the apertures. The spindle shaft is mounted in a predetermined angular relation to the disc drive housing, to position the selected bisecting plane at least approximately in the direction of maximum expected vibration during operation of the disc drive. In disc drives with linear actuators, this direction is the direction of linear actuator travel. In drives with rotary actuators, the direction is that of a tangent of the arcuate path traveled by the magnetic transducing heads as the actuator pivots, taken near a midpoint of the arcuate path.
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patent: 5089922 (1992-02-01), Le Clair
patent: 5091809 (1992-02-01), Connors et al.
Seagate Technology Inc.
Wolff John H.
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