Arc discharge lamp having improved performance
US4891554A · kind A · utility
4Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1988 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Oct 31, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/368
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved high intensity arc discharge lamp is disclosed having curved projection means included when a bowed shape arc discharge is being closed to preclude molten vitreous material from deforming the internal cavity. In this manner, the arc tube internal cavity is more reliably shaped and sized with the discharge electrodes being more accurately positioned within the internal cavity. Such curved projection means are provided in each pinch seal region of the arc tube and can be formed mechanically with the jaw members ordinarily employed for the pinch sealing operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.