EP 0250920 B1 19920902 - HIGH-PRESSURE METAL HALIDE DISCHARGE LAMP
Title (en)
HIGH-PRESSURE METAL HALIDE DISCHARGE LAMP
Publication
Application
Priority
DE 3620961 A 19860623
Abstract (en)
[origin: EP0250920A2] To avoid corrosion on the inner leads (8, 9) as a result of the corrosive filling components of a high-pressure metal halogen discharge lamp (1), two auxiliary electrodes (16, 17) of undoped tungsten wire are arranged inside the discharge space (10), each of which electrodes is electrically conductively mounted on one of the inner leads (8, 9) at the point where it emerges from the deformation (3) in the discharge space (10), the unobstructed separation (d) between the auxiliary electrodes being less than the unobstructed separation (D) between the inner leads (8, 9). In an alternative embodiment, the auxiliary electrodes are mounted on the sealing films (4, 5) embedded inside the deformation (3). The longitudinal axes of the auxiliary electrodes (16, 17) may have any angle ( alpha ) between 0 DEG and 90 DEG with respect to the longitudinal axes of the inner leads (8, 9). <IMAGE>
IPC 1-7
IPC 8 full level
H01J 61/073 (2006.01); H01J 61/54 (2006.01)
CPC (source: EP)
H01J 61/073 (2013.01); H01J 61/545 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0250920 A2 19880107; EP 0250920 A3 19891115; EP 0250920 B1 19920902; DE 3620961 A1 19880114; DE 3781470 D1 19921008
DOCDB simple family (application)
EP 87108120 A 19870604; DE 3620961 A 19860623; DE 3781470 T 19870604