公开(公告)号：FR2317732A1

公开(公告)日：1977-02-04

申请号：FR7618342

申请日：1976-06-09

Applicant: IBM

Inventor： KRAEMER EDWARD J ,  PATEL TULSIDAS R

IPC: G11B25/04 ,  G11B5/50 ,  G11C11/02

Abstract: A magnetic disk information storage apparatus comprises a head/disk assembly removably mounted in a housing assembly. The head/disk assembly encloses rotatably mounted disks, and accessing heads mounted for linear movement on a carriage. Fixed to the carriage and therefore part of the subassembly is a linear actuator coil. The linear actuator magnet structure which cooperates with the coil to produce motion of the carriage is located in the housing assembly. Loadings of the subassembly into the housing assembly locates the actuator coil in a magnetic flux gap of the magnet structure.

公开(公告)号：CS214872B2

公开(公告)日：1982-06-25

申请号：CS457976

申请日：1976-07-09

Applicant: IBM

Inventor： KRAEMER EDWARD J ,  PATEL TULSIDAS R

IPC: G11B25/04 ,  G11B5/50 ,  G11B5/02

Abstract: A magnetic disk information storage apparatus comprises a head/disk assembly removably mounted in a housing assembly. The head/disk assembly encloses rotatably mounted disks, and accessing heads mounted for linear movement on a carriage. Fixed to the carriage and therefore part of the subassembly is a linear actuator coil. The linear actuator magnet structure which cooperates with the coil to produce motion of the carriage is located in the housing assembly. Loadings of the subassembly into the housing assembly locates the actuator coil in a magnetic flux gap of the magnet structure.

公开(公告)号：FR2408239A1

公开(公告)日：1979-06-01

申请号：FR7828929

申请日：1978-10-02

Applicant: IBM

Inventor： PATEL TULSIDAS R

IPC: H02K33/18 ,  G11B5/55 ,  G11B25/04 ,  H02K16/00 ,  H02K41/035 ,  H02K41/02 ,  G11B21/00

公开(公告)号：CA1135409A

公开(公告)日：1982-11-09

申请号：CA339711

申请日：1979-11-13

Applicant: IBM

Inventor： MULVANY RICHARD B ,  PATEL TULSIDAS R

IPC: G11B21/02 ,  G11B5/55 ,  G11B17/22 ,  G11B19/20 ,  G11B21/08 ,  G11B23/02 ,  G11B25/04 ,  G11B5/48

Abstract: A disk file for storing data is disclosed which comprises two major separable assemblies, an HDA assembly and a disk drive assembly. The HDA assembly is characterized by two separate carriage units each of which function to position a plurality of magnetic transducers in transducing relationship with a different group of magnetic disks which are mounted on a common horizontally disposed disk spindle. The disk drive assembly is characterized by an integral baseplate whose front section is generally U-shaped in cross-sections permitting the lower portion of the HDA assembly which surrounds the magnetic disks to be positioned within the opening defined by the opposed surfaces of the U-shaped front portion. The front portion is open to accommodate the positioning of the HDA assembly on the drive assembly by a horizontal loading motion. The drive portion of the baseplate is provided with a horizontally disposed shelf portion to which the magnetic structure of a voice coil motor is mounted. The annular flux gaps of the voice coil motor are positioned to receive voice coils which may be permanently associated with the carriage units of the HDA. SA979001 The drive assembly further inclues a motor which is disposed beneath the horizontal shelf portion and which may be coupled to drive the spindle of the HDA assembly. Additionally, an air supply system including a blower which is connected directly to the spindle motor shaft is provided to supply contaminant free air to the HDA assembly. SA979001

公开(公告)号：CA1079847A

公开(公告)日：1980-06-17

申请号：CA255963

申请日：1976-06-29

Applicant: IBM

Inventor： KRAEMER EDWARD J ,  PATEL TULSIDAS R

IPC: G11B25/04 ,  G11B5/50 ,  G11B17/00

Abstract: MAGNETIC DISK INFORMATION STORAGE APPARATUS A magnetic disk information storage apparatus comprises an information storage subassembly disengagably mounted in a housing assembly. The subassembly encloses rotatably mounted disks, and accessing heads mounted for linear movement on a carriage. Fixed to the carriage and therefore part of the subassembly is a linear actuator coil. The linear actuator magnet structure which cooperates with the coil to produce motion of the carriage is located in the housing assembly. Loading of the subassembly into the housing assembly locates the actuator coil in a magnetic flux gap of the magnet structure.

公开(公告)号：CA1068320A

公开(公告)日：1979-12-18

申请号：CA307342

申请日：1978-07-13

Applicant: IBM

Inventor： PATEL TULSIDAS R

IPC: H02K33/18 ,  G11B5/55 ,  G11B25/04 ,  H02K16/00 ,  H02K41/035 ,  H02K41/02

Abstract: MULTI-ACTUATOR SYSTEM USING SINGLE MAGNETIC CIRCUIT A voice coil motor having a plurality of independent coils movable within annular flux gaps which are supplied in parallel with flux from a single permanent magnet. The actuator comprises a single permanent magnet mounted to a low reluctance backing plate, a plurality of pole pieces, and a low reluctance casing including an integral pole plate provided with a like plurality of pole piece receiving apertures. The casing extends from the perimeter of the pole plate portion to the backing plate completely surrounding the pole pieces, coils and the magnet. Each pole piece has a rectangular base attached to the permanent magnet and a cylindrical portion which extends into the pole plate portion to define the annular gap, the axis of which is generally normal to the permanent magnet. Adjacent pole pieces abut each other along one edge to assist in maintaining a balanced magnetomotive force to the pole pieces. The axial length of the coil is less than the axial length of the annular air gap to provide a short coil long gap type of actuator and thereby minimize any interaction between the separate parallel flux paths which extend from the permanent magnet.