Method of fabrication of flat grids of pyrolitic graphite for electron tubes
US4245379A · kind A · utility
0Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1979 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Sep 19, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J19/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flat grid of pyrolytic graphite is obtained by cutting a disc from a cylindrical blank followed by deformation under pressure and by means of a partial vacuum. The grid is then machined and stretched within a stressing frame which also serves to mount the grid within the electron tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.