Thermoelectric cathode for a hyperfrequency valve and valves incorporating such cathodes
US4494035A · kind A · utility
5Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1981 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Nov 4, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J23/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention concerns a thermoelectronic cathode for hyperfrequency electron tubes. The cathode comprises a cylindrical molybdenum casing, the lower portion of which contains a heating filament, while the upper portion contains two superimposed porous bodies, the lower one made from impregnated material, and the upper one from non-impregnated material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.