公开(公告)号：CA1114499A

公开(公告)日：1981-12-15

申请号：CA290069

申请日：1977-11-02

Applicant: IBM

Inventor： COX ALLEN R ,  HATCHETT MICHAEL R ,  RIGBEY LEONARD J

IPC: G11B25/04 ,  G11B17/32

Abstract: CONTROLLED SURFACE FINISH FOR FLEXIBLE DISK STABILIZING PLATE A stabilizing backing plate for a rotating flexible record disk has a bearing surface with a smooth finish to prevent disk wear but provided with a plurality of depressions which trap air and prevent the flexible disk from adhering to the backing plate during start-up.

公开(公告)号：CA1084161A

公开(公告)日：1980-08-19

申请号：CA285281

申请日：1977-08-23

Applicant: IBM

Inventor： HATCHETT MICHAEL R ,  RIGBEY LEONARD J

IPC: G11B23/033 ,  G11B17/32 ,  G11B25/04 ,  G11B17/08 ,  G11B3/60

Abstract: The flexible disk of a flexible disk file is provided with a stationary backing plate over which the disk rotates supported on an air bearing between it and the plate. The plate has a longitudinal slot extending in a radial direction with respect to the disk to permit access by a record/playback head to the disk surface facing the plate. The backing plate is shaped in such a way that the rotating disk is continuously bent upwards about two chords on each side of a line through the head slot. The provision of these bends imparts stiffness to the disk in the vicinity of the head slot and stabilizes the flying characteristics of the disk.

公开(公告)号：CA1012640A

公开(公告)日：1977-06-21

申请号：CA136741

申请日：1972-03-09

Applicant: IBM

Inventor： CUZNER DAVID E ,  DODMAN CHARLES O R ,  HEATH JOHN S ,  RIGBEY LEONARD J ,  CROUCH HOWARD S ,  GEORGE IAN C

IPC: G11B5/48 ,  G11B5/55 ,  G11B17/028 ,  G11B23/02 ,  G11B23/50 ,  H02K41/035

Abstract: A magnetic disc apparatus including a sealed module which encloses magnetic discs, magnetic heads attached to head arm assemblies, an electromagnetic actuator for positioning the magnetic heads on the head arm assemblies, and a drive spindle on which the discs are seated. All control of the positioning of the head arm assembly, the operation of the electromagnetic actuator and the read write function being provided by electrical signals communicated between the file housing and the sealed module. A drive motor within the file housing is coupled to the enclosed spindle, which extends from the module while maintaining the module seal, for providing only rotary motion to the discs attached to the spindle.