Patent · US Expired

High-pressure discharge lamp and method of manufacture

US5404078A · kind A · utility

37Cited by

9References

29Claims

0Family size

Assignees

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE
NGK INSULATORS, LTD. · JP

Inventors

Axel Bunk · Berlin, DE
Stefan Jüngst · Zorneding, DE
Kouichiro Maekawa · Ichinomiya, JP
Joachim Werner · Bethel Park, US

Key dates

Filing date	Jul 13, 1992
Grant date	Apr 4, 1995
Priority date	—
Expiry date	Jul 13, 2012

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/363
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A high pressure discharge lamp has a ceramic discharge vessel (8), whose s are closed with plugs (11). The metallic feedthrough, or a main part of it, has a thermal coefficient of expansion which is smaller than the coefficient of the ceramic. The current feedthrough is gas-tightly sintered directly into the plug.

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