Magnetic imaging apparatus
US4414554A · kind A · utility
34Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1980 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Jul 21, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus for producing in a magnetic image-storage medium a high-resolution, smooth-edge-defining magnetic image. Such is accomplished through the cooperative action of two, opposite-polarity, concentric magnetic poles which function to create, on a face in such a medium, a somewhat doughnut-shaped defined magnetized zone, which zone is characterized by multi-directionally oriented magnetic vectors distributed generally with spherical geometry. The magnetic poles are created by exciting electrically magnetic-flux-inducing spiral coils which are spaced from the magnetic poles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.