Safeguarding of data recorded on disk by tunnel erase magnetic head assembly
US4442463A · kind A · utility
5Cited by
0References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1982 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Nov 29, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus is provided for the safeguarding of data recorded on disk and diskettes by tunnel erase magnetic head assembly which comprise a read/write transducer for magnetically recording data along tracks on said disk and a pair of magnetic erase transducers adjacent to the read/write transducer for limiting the width of the recorded data. The apparatus for safeguarding the recorded data comprises apparatus for sensing the activation of the erase and/or read/write transducer and apparatus responsive to such sensed activation for determining if the activation is erroneous.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.