Patent · US Expired

Flicker-suppressed, low-power, high-pressure discharge lamp

US5510675A · kind A · utility

4Cited by

10References

10Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Axel Bunk · Berlin, DE
Jurgen Vom Scheidt · Berlin, DE

Key dates

Filing date	Jan 21, 1993
Grant date	Apr 23, 1996
Priority date	—
Expiry date	Jan 21, 2013

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/0732
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

To reduce flicker in low-power, high-pressure discharge lamps, the electrs, in the region in which they face each other, have wrap windings, of about 2 to 4 turns wrapped thereabout and the terminal end of the electrode has an essentially spherical end head element (19, 19', 39) melted thereon, which essentially spherical head element may be a segment of a sphere, ellipsoid-shaped or similarly formed. The electrode shaft, the wrap winding and the sphere preferably are all made of undoped tungsten, although the electrode shaft may be of a lower melting metal, such as rhenium.

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