EP 0555755 B1 19951011 - High pressure discharge lamp.
Title (en)
High pressure discharge lamp.
Title (de)
Hochdruckentladungslampe.
Title (fr)
Lampe à décharge haute pression.
Publication
Application
Priority
DE 4203976 A 19920211
Abstract (en)
[origin: EP0555755A1] In the case of the high-pressure discharge lamp having a pinched discharge vessel and a metal halide filling, the electrodes (4) consist of a straight shank (17) on whose end facing the discharge arc a helical part (18) is placed which has turns which lie tightly against one another. Melted on to the free tip of the shank (17) is a solid head part which consists of tungsten, has a spherical shape at least in the direction of the discharge arc and is in close thermal contact with the helical part (18). The electrode shape results in a major reduction in flickering during operation of the lamp. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 61/073 (2006.01)
CPC (source: EP US)
H01J 61/0732 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0555755 A1 19930818; EP 0555755 B1 19951011; CA 2089251 A1 19930812; CA 2089251 C 20020820; DE 4203976 A1 19930812; DE 59300723 D1 19951116; JP H0613027 A 19940121; US 5510675 A 19960423
DOCDB simple family (application)
EP 93101665 A 19930203; CA 2089251 A 19930210; DE 4203976 A 19920211; DE 59300723 T 19930203; JP 4720793 A 19930210; US 672893 A 19930121