Thermionic cathode for electron tubes and method for the manufacture thereof
US5828165A · kind A · utility
4Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1997 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Mar 4, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a thermionic cathode for electron tubes comprising a material that has a substrate, a compound of an element forming an emitting monolayer, chosen from among the rare earth zirconates, rare earth hafnates, rare earth aluminates and rare earth berylates, and a reducing agent which, at the working temperature of the cathode, reacts with the compound releasing the element that forms the monolayer. Application in particular to electron grid tubes. FIG. 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.