Patent · US Expired

High pressure sodium lamp of low power

US6051927A · kind A · utility

75Cited by

2References

14Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Wolfram Graser · Munich, DE
Dieter Schmidt · Steinhagen, DE

Key dates

Filing date	Oct 1, 1997
Grant date	Apr 18, 2000
Priority date	—
Expiry date	Oct 1, 2017

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/34
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The high-pressure sodium discharge lamp of low power described here is chcterized by a very high xenon cold filling pressure of at least 1 bar. The pressure ratio to the sodium operating pressures lies between 10 and 30. Luminous efficacies of approximately 100 lm/W and more can be obtained with a lamp power of 50 to 100 W.

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