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公开(公告)号：DE69111634D1
公开(公告)日：1995-09-07
申请号：DE69111634
申请日：1991-02-04
Applicant: IBM
Inventor： BOLTON IVOR WILLIAM , GAUNT DAVID SYDNEY , CASTLE FRANK ERIC
Abstract: Electrical apparatus is described which may include one or more electrical devices, each being located in a corresponding one of a plurality of device positions defined in a first section of a housing. The system further includes at least one brushless dc motor driven centrifugal fan, and a power supply unit. In operation, the fans provide forced air cooling of the devices and power supply. Each of the devices is selected from a plurality of possible device types, each device type presenting a different impedance to the flow of cooling air.
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公开(公告)号：GB2266805A
公开(公告)日：1993-11-10
申请号：GB9207304
申请日：1992-04-03
Applicant: IBM
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公开(公告)号：DE69005442D1
公开(公告)日：1994-02-03
申请号：DE69005442
申请日：1990-04-18
Applicant: IBM
Inventor： GOLLEDGE IAN , GRAY DAVID JOHN , O'REGAN RICHARD , CASTLE FRANK ERIC
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公开(公告)号：DE3680667D1
公开(公告)日：1991-09-05
申请号：DE3680667
申请日：1986-05-23
Applicant: IBM
Inventor： COOPER ROGER ANTHONY , HEARN ANTHONY ROGER , CASTLE FRANK ERIC
Abstract: Head/arm assembly and rotary access mechanism for a disk file comprises (a) at least one planar cantilever arm (10) for supporting a transducing head (31) at or near its free end; (b) a counterweight (50); (c) an attachment means (51,54) for attaching the counterweight (50) at the opposite end of the arm (10) so that the head/arm assembly is balanced under predetermined conditions about an axis (70) through the assembly perpendicular to the plane of the arm (10); and (d) locating means (43,44,45) for locating the head/arm assembly on a rotary actuator (80) with the axis coincident with the axis of rotatkion of the actuator (80), the actuator being subject to inherent torsional resonances about its axis of rotation; the head/arm assembly being such that (e) the attachment means includes a resilient connection (54) for at least a portion (52) of the counterweight (50) such that the resiliently supported portion (52) acts as an auxiliary mass damper tuned relative to the fundamental resonant frequency of torsional oscillation of the rotary actuator (80).
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公开(公告)号：DE69005442T2
公开(公告)日：1994-06-23
申请号：DE69005442
申请日：1990-04-18
Applicant: IBM
Inventor： GOLLEDGE IAN , GRAY DAVID JOHN , O'REGAN RICHARD , CASTLE FRANK ERIC
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Patent Agency Ranking
公开(公告)号：DE3581544D1
公开(公告)日：1991-02-28
申请号：DE3581544
申请日：1985-10-31
Applicant: IBM
IPC: G11B17/038 , G11B21/02 , G11B25/04 , G11B33/14 , G11B23/03
Abstract: A disk file comprises a disk stack subassembly (10) and a head positioning actuator (50) each mounted on opposite sides of a central box frame (81). The disk stack subassembly (10) has a non-rotating central spindle (11) and an in-hub electric motor (30) whose stator (32) is mounted on the spindle (11). The rotor (31) of the motor (30) is mounted internally of a hub (15) supported for rotation about the spindle by two bearings (16, 17) at opposite ends of the spindle (11). A stack of disks (18) is mounted externally on the hub (15). The box frame (81) is open to one side and the opposite ends of the stationary spindle (11) are located and fixed in the frame (81) so that the disk stack subassembly (10) spans the open side. Because of the symmetry and rigidity of the design, susceptibility to thermal or vibration induced misregistration is reduced. Finally a cover (90) completes the enclosure.
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公开(公告)号：BR8605304A
公开(公告)日：1987-07-28
申请号：BR8605304
申请日：1986-10-29
Applicant: IBM
IPC: G11B17/038 , G11B21/02 , G11B25/04 , G11B33/14 , G11B17/08
Abstract: A disk file comprises a disk stack subassembly (10) and a head positioning actuator (50) each mounted on opposite sides of a central box frame (81). The disk stack subassembly (10) has a non-rotating central spindle (11) and an in-hub electric motor (30) whose stator (32) is mounted on the spindle (11). The rotor (31) of the motor (30) is mounted internally of a hub (15) supported for rotation about the spindle by two bearings (16, 17) at opposite ends of the spindle (11). A stack of disks (18) is mounted externally on the hub (15). The box frame (81) is open to one side and the opposite ends of the stationary spindle (11) are located and fixed in the frame (81) so that the disk stack subassembly (10) spans the open side. Because of the symmetry and rigidity of the design, susceptibility to thermal or vibration induced misregistration is reduced. Finally a cover (90) completes the enclosure.
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公开(公告)号：DE69111634T2
公开(公告)日：1996-05-02
申请号：DE69111634
申请日：1991-02-04
Applicant: IBM
Inventor： BOLTON IVOR WILLIAM , GAUNT DAVID SYDNEY , CASTLE FRANK ERIC
Abstract: Electrical apparatus is described which may include one or more electrical devices, each being located in a corresponding one of a plurality of device positions defined in a first section of a housing. The system further includes at least one brushless dc motor driven centrifugal fan, and a power supply unit. In operation, the fans provide forced air cooling of the devices and power supply. Each of the devices is selected from a plurality of possible device types, each device type presenting a different impedance to the flow of cooling air.
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公开(公告)号：SG90294G
公开(公告)日：1994-10-14
申请号：SG90294
申请日：1994-07-09
Applicant: IBM
Inventor： GOLLEDGE IAN , GRAY DAVID JOHN , O'REGAN RICHARD , CASTLE FRANK ERIC
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公开(公告)号：GB2241118A
公开(公告)日：1991-08-21
申请号：GB9003472
申请日：1990-02-15
Applicant: IBM
Inventor： BOLTON IVOR WILLIAM , GAUNT DAVID SYDNEY , CASTLE FRANK ERIC
Abstract: Electrical apparatus is described which may include one or more electrical devices, each being located in a corresponding one of a plurality of device positions defined in a first section of a housing. The system further includes at least one brushless dc motor driven centrifugal fan, and a power supply unit. In operation, the fans provide forced air cooling of the devices and power supply. Each of the devices is selected from a plurality of possible device types, each device type presenting a different impedance to the flow of cooling air.
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