公开(公告)号：DE69026249D1

公开(公告)日：1996-05-02

申请号：DE69026249

申请日：1990-01-08

Applicant: IBM

Inventor： YOUNG JULIAN ,  HEARN ANTHONY ,  HALL MICHAEL ,  DEW GRAHAM

IPC: G11B17/038 ,  G11B19/20 ,  G11B23/03 ,  G11B25/04 ,  G11B33/12 ,  G11B33/14

Abstract: PCT No. PCT/GB90/00021 Sec. 371 Date Sep. 6, 1991 Sec. 102(e) Date Sep. 6, 1991 PCT Filed Jan. 8, 1990 PCT Pub. No. WO91/10995 PCT Pub. Date Jul. 25, 1991A disk file has a frame with a non-rotatable shaft (2) extending in an axial direction between opposed wall portions of the frame. The shaft is clamped at one end to the frame by a screw (8) passing through an opening in the wall and axially into the shaft. This arrangement is susceptible to tilting of the shaft due to differential thermal expansion if the frame wall (1) and the shaft have dissimilar coefficients of thermal expansion. A bush (9) is located between the screw and the shaft. The bush is held in the wall by an interference fit, and has a coefficient of thermal expansion similar to that of the shaft. The inclusion of the bush greatly reduces problems due to differential thermal expansion.

公开(公告)号：DE68923372T2

公开(公告)日：1996-03-07

申请号：DE68923372

申请日：1989-03-15

Applicant: IBM

Inventor： HATCHETT MICHAEL ,  HEARN ANTHONY ,  LACEY CHARLES

IPC: G11B25/04 ,  G11B33/12

Abstract: PCT No. PCT/GB89/00267 Sec. 371 Date Nov. 13, 1990 Sec. 102(e) Date Nov. 13, 1990 PCT Filed Mar. 15, 1989 PCT Pub. No. WO90/10934 PCT Pub. Date Sep. 20, 1990.A method of assembling a disk file comprises merging a pre-assembled actuator assembly and disk stack assembly prior to attaching them to a common base. The relative axial positions of the actuator assembly and disk stack assembly are measured and adjusted to align head arms with collapsed suspensions with the inter disk spaces. Once aligned the two assemblies can be moved together and the heads released.

公开(公告)号：DE69026249T2

公开(公告)日：1996-10-10

申请号：DE69026249

申请日：1990-01-08

Applicant: IBM

Inventor： YOUNG JULIAN ,  HEARN ANTHONY ,  HALL MICHAEL ,  DEW GRAHAM

IPC: G11B17/038 ,  G11B19/20 ,  G11B23/03 ,  G11B25/04 ,  G11B33/12 ,  G11B33/14

Abstract: PCT No. PCT/GB90/00021 Sec. 371 Date Sep. 6, 1991 Sec. 102(e) Date Sep. 6, 1991 PCT Filed Jan. 8, 1990 PCT Pub. No. WO91/10995 PCT Pub. Date Jul. 25, 1991A disk file has a frame with a non-rotatable shaft (2) extending in an axial direction between opposed wall portions of the frame. The shaft is clamped at one end to the frame by a screw (8) passing through an opening in the wall and axially into the shaft. This arrangement is susceptible to tilting of the shaft due to differential thermal expansion if the frame wall (1) and the shaft have dissimilar coefficients of thermal expansion. A bush (9) is located between the screw and the shaft. The bush is held in the wall by an interference fit, and has a coefficient of thermal expansion similar to that of the shaft. The inclusion of the bush greatly reduces problems due to differential thermal expansion.

公开(公告)号：DE69027208D1

公开(公告)日：1996-07-04

申请号：DE69027208

申请日：1990-01-08

Applicant: IBM

Inventor： DEW GRAHAM ,  HEARN ANTHONY ,  SEBBORN DAVID ,  YOUNG JULIAN

IPC: G11B17/038 ,  G11B17/00 ,  G11B19/20 ,  G11B23/03 ,  G11B25/04 ,  G11B33/14

Abstract: PCT No. PCT/GB90/00020 Sec. 371 Date Oct. 1, 1992 Sec. 102(e) Date Oct. 1, 1992 PCT Filed Jan. 8, 1990 PCT Pub. No. WO91/11004 PCT Pub. Date Jul. 25, 1991.A disk file includes an expansion ring attached to the wall of the hub and which is located between the lowermost disk of the disk stack and the hub flange. A circular ridge concentric with the hub is formed on the ring and engages the underside of the disk. The ring is adapted so that the thermal expansion of the ring is substantially equal to that of the aluminum disk at the position of contact between the two. A washer interposed between ring and flange allows the ring to move freely relative to the flange. During thermal cycling, the ring and disk move at the same rate at the point of contact, the ring ensuring that the disks remain concentric with the hub throughout the range of disk file operating temperatures.

公开(公告)号：DE68923372D1

公开(公告)日：1995-08-10

申请号：DE68923372

申请日：1989-03-15

Applicant: IBM

Inventor： HATCHETT MICHAEL ,  HEARN ANTHONY ,  LACEY CHARLES

IPC: G11B25/04 ,  G11B33/12

Abstract: PCT No. PCT/GB89/00267 Sec. 371 Date Nov. 13, 1990 Sec. 102(e) Date Nov. 13, 1990 PCT Filed Mar. 15, 1989 PCT Pub. No. WO90/10934 PCT Pub. Date Sep. 20, 1990.A method of assembling a disk file comprises merging a pre-assembled actuator assembly and disk stack assembly prior to attaching them to a common base. The relative axial positions of the actuator assembly and disk stack assembly are measured and adjusted to align head arms with collapsed suspensions with the inter disk spaces. Once aligned the two assemblies can be moved together and the heads released.

公开(公告)号：DE68920322T2

公开(公告)日：1995-07-06

申请号：DE68920322

申请日：1989-03-15

Applicant: IBM

Inventor： COMMANDER ROBERT ,  HEARN ANTHONY

IPC: G11B21/02 ,  G11B5/55 ,  H02K33/18 ,  H02K41/02 ,  H02K41/035

Abstract: PCT No. PCT/GB89/00268 Sec. 371 Date Nov. 14, 1990 Sec. 102(e) Date Nov. 14, 1990 PCT Filed Mar. 15, 1989 PCT Pub. No. WO90/10931 PCT Pub. Date Sep. 20, 1990.A voice coil actuator comprising a carriage assembly and a magnet assembly includes a cylindrical shorted turn resiliently mounted in the magnet assembly. The shorted turn is thereby allowed limited movement in a direction parallel to its own axis. In this way, the reaction force on the magnet assembly, caused by the movement of the carriage assembly during operation of the actuator, can be absorbed by the shorted turn.

公开(公告)号：DE68920322D1

公开(公告)日：1995-02-09

申请号：DE68920322

申请日：1989-03-15

Applicant: IBM

Inventor： COMMANDER ROBERT ,  HEARN ANTHONY

IPC: G11B21/02 ,  G11B5/55 ,  H02K33/18 ,  H02K41/02 ,  H02K41/035

Abstract: PCT No. PCT/GB89/00268 Sec. 371 Date Nov. 14, 1990 Sec. 102(e) Date Nov. 14, 1990 PCT Filed Mar. 15, 1989 PCT Pub. No. WO90/10931 PCT Pub. Date Sep. 20, 1990.A voice coil actuator comprising a carriage assembly and a magnet assembly includes a cylindrical shorted turn resiliently mounted in the magnet assembly. The shorted turn is thereby allowed limited movement in a direction parallel to its own axis. In this way, the reaction force on the magnet assembly, caused by the movement of the carriage assembly during operation of the actuator, can be absorbed by the shorted turn.