Patent · US Expired

Electrode system with a current feedthrough through a ceramic component

US7602115B2 · kind B2 · utility

0Cited by

3References

6Claims

0Family size

Assignee

W. C. Heraeus GmbH · DE

Inventors

Reinhold Weiland · Neuberg, DE
Harald Manhardt · Bruchköbel, DE
David Francis Lupton · Gelnhausen, DE

Key dates

Filing date	Mar 25, 2005
Grant date	Oct 13, 2009
Priority date	—
Expiry date	May 14, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/366
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electrode system with a current feedthrough through a ceramic discharge vessel is provided which, on one hand, increases the visible output of lamps and, on the other hand, allows smaller dimensions. For this purpose, the current feedthrough is made of rhenium or a platinum-group metal. In this way, improved color reproduction is also achievable. In preferred embodiments: (a) the current feedthrough is made of rhenium or a rhenium alloy or a platinum-group metal or a platinum-group metal alloy and the current feedthrough is brazed flush in the discharge vessel, (b) the discharge vessel has no shaft, and/or (3) the current feedthrough is in the form of one or more joined spheres.

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