Curved tube type ultra high pressure mercury arc discharge lamp device
US4482842A · kind A · utility
6Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1981 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Sep 29, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/822
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a curved tube type ultra high pressure mercury discharge lamp device of the type comprising an arcuate glass tube, a quantity of mercury contained in both ends of the glass tube and electrodes projecting into the glass tube beyond surfaces of the mercury for creating electric discharge between the electrodes, throttles are formed on an inner surface of the glass tube near the electrodes. The throttles have diameters smaller than an inner diameter of the glass tube and the mercury is contained in spaces between the throttles and the both ends of the glass tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.