发明名称 |
Magnetic head load control system |
摘要 |
A control system for applying a magnetic head onto a magnetic disk in random places thereon including a free running oscillator and switching means responsive to pulses from said oscillator and a head load command signal derived from the disk during a revolution thereof for initiating the energization of a head engaging solenoid. The system includes a capacitor which is charged at various rates to produce an initial fast rising current in the solenoid for moving the head into close proximity with the disk, a slowly rising subsequent current in the solenoid for engaging the head with the disk gradually, and a final fast rising current in the solenoid for completing the engagement of the head on the disk.
|
申请公布号 |
US4202020(A) |
申请公布日期 |
1980.05.06 |
申请号 |
US19780938727 |
申请日期 |
1978.08.31 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORP |
发明人 |
LOVGREN, JEFFREY L;QUINLAN, WILLIAM P |
分类号 |
G11B21/20;G11B5/54;G11B21/12;G11B21/16;G11B21/21;(IPC1-7):G11B21/12 |
主分类号 |
G11B21/20 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|