Rotating rigid disk data storage device
US4516177A · kind A · utility
78Cited by
10References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Mar 15, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/085
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved rotating disk data storage device is achieved in a combination of an optical encoder to detect data track crossings, a servo sector surface on one of a plurality of rotating data storage disks with the surface being filled with a pattern of alternating bursts which are read for relative amplitude and compared to provide track centerline information. A programmed microprocessor and a rotary actuator for the data transducers combine with the other elements to move the transducers from track to track and keep them on track during data read and write operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.