Patent · US Expired

High-pressure discharge lamp with a cooled electrode

US6218780A · kind A · utility

4Cited by

8References

13Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Dietmar Ehrlichmann · Berlin, DE
Dieter Franke · Munich, DE

Key dates

Filing date	Jun 24, 1998
Grant date	Apr 17, 2001
Priority date	—
Expiry date	Jun 24, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/82
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Each electrode comprises a shaft (6) and a head (5), the shaft being sealed in a vacuum-tight fashion in each case in an end region (2, 22) of the discharge vessel. At least one electrode is cooled by virtue of the fact that its shaft contains a cooling tube system in which a coolant (11) circulates. Said cooling tube system is surrounded at a spacing by an additional enveloping tube (9, 16), the interspace (10, 20) between the enveloping tube and cooling tube system being fitted with a means of thermal insulation.

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