Method of producing itegral electrode structure for electron gun
US4481003A · kind A · utility
2Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1982 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | Sep 29, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/503
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for producing an electrode structure for use in an electron gun, especially an in-line type electrode structure for use an electron gun of a color picture tube. The electrode structure dispenses with auxiliary electrodes by forming its three cylindrical members integrally by press work. After the pressing step, the inner edge of the bottom portion of each of the cylindrical members is beveled to provide a tapering surface having a desired circular cross section. By forming a circular groove in the bottom portion, opposite to the tapering surface, the formation of the tapering surface is made more exact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.