Patent · US Expired

Discharge lamp with secondary ignition electrode

US6008583A · kind A · utility

9Cited by

7References

9Claims

0Family size

Assignee

HERAEUS KULZER GMBH · DE

Inventors

Uwe Breuer · Gröbenzell, DE
Peter Gernhard · Friedrichsdorf, DE
Steffen Oppawsky · Bad Homburg vor der Höhe, DE
Dieter Schodel · Wiesbaden, DE

Key dates

Filing date	Jul 30, 1997
Grant date	Dec 28, 1999
Priority date	—
Expiry date	Jul 30, 2017

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/547
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A discharge lamp includes a lamp tube containing a noble gas, two internal electrodes, and a secondary electrode disposed outside and close to the surface of the lamp tube. In one embodiment, studs are disposed on the lamp tube so as to affix the secondary electrode. In an alternate embodiment, a reflector includes an indentation pointing toward the lamp tube and configured as the secondary ignition wire.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.