Cathode ray tube having an Fe-Co-Cr shadow mask and method of manufacturing such a shadow mask
US4616154A · kind A · utility
1Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1984 |
| Grant date | Oct 7, 1986 |
| Priority date | — |
| Expiry date | Jun 22, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/142
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode-ray tube of the post-focusing type comprising color selection means in the form of a ferromagnetic plate having a large number of apertures. The plate is magnetized so that a magnetic quadrupole lens is formed in each aperture. The ferromagnetic plate consists of an Fe-Co-Cr alloy having 25-27% by weight of Co and the remainder essentially Fe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.