Indirectly-heated cathode device for electron tubes
US4184100A · kind A · utility
11Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1978 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | Mar 22, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An indirectly-heated cathode device for electron tubes, comprising a hollow cathode sleeve of thin wall, a base metal mounted to one end of the sleeve and having the surface coated with an electron-emitting material, and a heater mounted within the sleeve. The sleeve is made of Ni-Cr alloy containing 2 to 35% by weight of Cr and predetermined amounts of additives including Co, W, Mo and/or Fe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.