公开(公告)号：JPS62209782A

公开(公告)日：1987-09-14

申请号：JP201187

申请日：1987-01-09

Applicant: IBM

Inventor： ASHBEE WILLIAM HENRY ,  KILEN RICHARD SCOTT ,  KIRTON ALAN JOHN ,  RITTENHOUSE LARRY EDWARD ,  VALENT JAMES ALFRED

IPC: G11B21/08 ,  G11B5/55

公开(公告)号：DE3774293D1

公开(公告)日：1991-12-12

申请号：DE3774293

申请日：1987-02-03

Applicant: IBM

Inventor： ASHBEE WILLIAM HENRY ,  KILEN RICHARD SCOTT ,  KIRTON ALAN JOHN ,  RITTENHOUSE LARRY EDWARD ,  VALENT JAMES ALFRED

IPC: G11B21/08 ,  G11B5/55 ,  G11B21/10

公开(公告)号：DE3576874D1

公开(公告)日：1990-05-03

申请号：DE3576874

申请日：1985-05-29

Applicant: IBM

Inventor： JANSSEN DONOVAN MILO ,  KIRTON ALAN JOHN ,  MURPHY ROBERT MICHAEL ,  ROSE LEROY

IPC: G11B17/028 ,  G11B17/03

公开(公告)号：DE3585303D1

公开(公告)日：1992-03-12

申请号：DE3585303

申请日：1985-05-29

Applicant: IBM

Inventor： FRIEHAUF WILLIAM JOSEPH ,  JANSSEN DONOVAN MILO ,  MURPHY ROBERT MICHAEL ,  ROSE LEROY ,  KIRTON ALAN JOHN

IPC: G11B33/12 ,  G11B17/028 ,  G11B21/02 ,  G11B25/04 ,  G11B33/02

Abstract: A flexible disk drive (11) is disclosed that is optimized for automated manufacture. The critical elements of the disk drive are divided into two functional groups, one of which includes the elements for loading and unloading the disk cartridge and the other of which includes the element for reading and writing on the flexible disk within the cartridge, with the elements of each group being precisely registered with respect to one another on separate frame members. The frame members are coarsely registered with respect to one another and snapped together, after separate assembly of at least most of the elements on the separate frame members has been completed, and fine position registration of the flexible disk to the spindle is thereafter achieved during each loading operation of a flexible disk into the assembly disk drive by collet centering and clamping the disk to the spindle. By this arrangement, automated methods of manufacture can be effectively carried out for assembly of each member as well as final assembly of the frame members.

公开(公告)号：DE3573038D1

公开(公告)日：1989-10-19

申请号：DE3573038

申请日：1985-06-03

Applicant: IBM

Inventor： JANSEN DONOVAN MILO ,  KIRTON ALAN JOHN ,  MURPHY ROBERT MICHAEL ,  ROSE LEROY

IPC: G11B17/041 ,  G11B5/54 ,  G11B17/028 ,  G11B17/04 ,  G11B17/043 ,  G11B5/016

Abstract: A torsional actuator is disclosed for loading and unloading a flexible disk drive. The actuator includes a torsion beam having a biasing arm and a plurality of actuating arms extending therefrom with the free ends of the actuating arms being separately engageable with different ones of the collet, pressure pad and recording head arm of the flexible disk drive. The arms of the actuator are configured to enable selective and sequential movement of the collet, pressure pad and/or recording head arm in one direction toward a disk within the drive to establish a loaded, or operational, position and in the opposite direction away from a disk within the drive to establish an unloaded, or disk accessing, position with such positioning being determined by a force applying cam engageable with the actuator.

公开(公告)号：CA1236568A

公开(公告)日：1988-05-10

申请号：CA529772

申请日：1987-02-16

Applicant: IBM

Inventor： ASHBEE WILLIAM HENRY ,  KILEN RICHARD SCOTT ,  KIRTON ALAN JOHN ,  RITTENHOUSE LARRY EDWARD ,  VALENT JAMES ALFRED

IPC: G11B21/08 ,  G11B5/55 ,  G11B21/10

Abstract: MAGNETIC HEAD POSITIONING APPARATUS AND METHOD An apparatus and method are disclosed for positioning magnetic heads relative to the recording tracks of a recording medium such as a floppy disk having circular, concentric recording tracks formed thereon. The magnetic heads are mounted on a head carriage, and the head carriage is moved, in response to received command pulses, so that the heads are moved linearly, by step increments, along a radius of the floppy disk. The heads are thereby moved across the spaced tracks on the disk, with each incremental movement of the heads being a distance less than the distance between the tracks, and being, for example, onehalf or one-fourth of the total distance between tracks. Acoustic noise due to head movement is minimized by moving the heads by increments less than the distance between the tracks, with such movement avoiding exciting the resonances of the head moving apparatus. The magnetic heads are initially moved at a rate known to avoid exciting the resonance and, during such initial movement, the rate of received command pulses is determined. If the received command pulse rate is within a predetermined range, and is a rate that will not excite resonance, continued movement of the head is at the rate of the received command pulses.