Ultraviolet generating device comprising discharge tube joined to two tubular envelopes
US4349765A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1978 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Oct 30, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2540/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for generating high intensity ultraviolet radiation thermoemissively in a discharge tube filled with a mercury vapor and at least one rare gas, the discharge tube having two ends joined to two tubular envelopes housing anode and cathode electrodes, wherein the rare gas is either argon, krypton or xenon maintained at an operating pressure of between 0.01 and 0.5 Torr, and the discharge tube and the tubular envelopes consist of doped quartz glass doped such that radiation lines at 185 and 194 mm are almost completely absorbed and a radiation line at 254 nm is transmitted almost without loss, and wherein is provided on the discharge tube an appendix-like piece of tube, which is to receive condensed mercury and the temperature of which is adjustable between 48.degree. and 65.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.