Tungsten halogen lamp base
US4785218A · kind A · utility
10Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1987 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Jul 13, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A prefocused tungsten-halogen lamp including a vitreous envelope having a press-seal at one end thereof for receiving and supporting lead-in wires that in turn support a filament disposed in the envelope. The press-seal is received in an all ceramic base with a close fit with the sidewalls of the base, while leaving a void space under the press-seal that is filled with a sealing cement preferably injected into the void space through a hole in the ceramic base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.