Patent · US Expired

Dual-envelope high-pressure discharge lamp with thermostatically controlled starting strip

US5079479A · kind A · utility

5Cited by

4References

14Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Helmut Weske · Berlin, DE
Manfred Koenig · Berlin, DE
Klaus Krämer · Baudenbach, DE

Key dates

Filing date	Mar 20, 1991
Grant date	Jan 7, 1992
Priority date	—
Expiry date	Mar 20, 2011

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/544
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

To eliminate a holding frame for a starting wire (20) outside of an elongd discharge vessel (1), the starting wire (20) is directly connected to one of the electrode leads (4, 5), typically niobium tubes, by a bimetal strip (21) which is, preferably, bent in stepped form or Z shape. Under cold conditions, the strip or wire (20) is in engagement with the outside of the discharge vessel (1) to assist in starting, due to its electrical connection via the bimetal strip (21) with one of the electrodes; upon heating of the lamp, the bimetal strip (21) will lift the wire (20) off engagement with the discharge vessel (1) and thus prevent deterioration thereof.

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