公开(公告)号：CA1182214A

公开(公告)日：1985-02-05

申请号：CA399132

申请日：1982-03-23

Applicant: IBM

Inventor： ARGUMEDO ARMANDO J ,  CHOW WILLIAM W ,  FREEMAN ROBERT D ,  KLECZKOWSKI SPAWOMIR P

IPC: G11B5/105 ,  G11B5/265 ,  G11B5/29 ,  G11B5/58

Abstract: THERMAL COMPENSATION FOR MAGNETIC HEAD ASSEMBLY Ferrite read and write modules of a magnetic head assembly that are aligned and positioned within a nonferrite housing are clamped by a leaf spring between the walls of the housing. The leaf spring compensates for thermal mismatch between the ferrite modules and the housing, and compensates for stress fluctuation that occurs with temperature change. The clamping force of the leaf spring is precisely controlled.

公开(公告)号：CA2012800C

公开(公告)日：1995-01-17

申请号：CA2012800

申请日：1990-03-22

Applicant: IBM

Inventor： CHOW WILLIAM W ,  FENNEMA ALAN A ,  FIORINO BENJAMIN C ,  HENDERSON IAN E ,  KADLEC RONALD J ,  ROBERTS SPENCER D

IPC: G05D3/12 ,  G11B7/085 ,  G11B11/105 ,  G11B21/08 ,  G11B7/00

Abstract: A track-seeking apparatus of a disk recorder employs a track-crossing sensor to produce track-crossing signals. An oscillator is slaved to the sensor for supplying substitute track-crossing pulses in the absence of the sensor providing such pulses or when the radial velocity exceeds a threshold velocity. A velocity profile means alters the oscillator frequency so that the oscillator produces track-crossing pulses in accordance with the profile. TU988001