Method and apparatus for providing a clock assembly
US5894374A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1996 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Dec 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is a clock head assembly that provides reference clock signals during servo writing of a magnetic disk in a hard drive. The clock head assembly includes a clock head that is pivotably mounted to a housing. The housing encloses a disk mounted to a spindle. The spindle is attached to the spindle motor of a hard disk drive through an opening in the housing. The spindle motor of the disk drive rotates the spindle and disk of the clock head assembly. The clock head is coupled to a cam that is manually actuated by a lever to move the clock head arm assembly between a loaded position and an unloaded position. During servo writing, the clock head is loaded onto the disk so that reference clock signals may be read from the disk and provided to a servo controller which utilizes the clock signals to write servo information onto the disk within the hard disk drive. Upon completion of servo writing, the clock head assembly is detached from the hard disk drive. The clock head assembly may be attached to the hard drive assembly in a non-clean room environment. In addition, the servo writing process may be conducted in a non-clean room environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.