Magnetic transducer crash anticipation and response method and apparatus
US4841389A · kind A · utility
39Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1987 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jun 11, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A self-diagnostic method and apparatus is described for indicating the likelihood of an impending crash of a magnetic transducer or head with a rotating magnetic medium by dynamically and periodically calculating overwrite efficiency for performing a desired control operation when it exceeds a preselected value denoting dangerous proximity of the transducer to the surface of the medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.