Arc discharge tube end seal
US4291250A · kind A · utility
18Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 1979 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | May 7, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved arc tube end seal and the method of forming that seal in a high pressure sodium discharge lamp is disclosed. The method includes precoating the refractory metal end cap with a slurry of a mixture of refractory metal powder and powdered metallic silicon and baking the end cap prior to accomplishing the bonding of the end cap to the arc tube with a conventional sealing frit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.