Impregnated cathode
US5128584A · kind A · utility
4Cited by
3References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Feb 27, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An impregnated dispenser cathode comprises a porous metal matrix having electron emissive material is impregnated therein and a cup for storing the porous metal matrix and being fixed together with it. The porous metal matrix is secured to the bottom of the cup. The present invention has the advantage of sharply promoting the value of products as it enhances both their life expectancies and the characteristics of large cathode ray tubes while increasing their reliability by greatly improving the defects of the structure and manufacturing method of conventional impregnated dispenser cathodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.