EP 1481417 A1 20041201 - MERCURY SHORT ARCHED LAMP WITH A CATHODE CONTAINING LANTHANUM OXIDE
Title (en)
MERCURY SHORT ARCHED LAMP WITH A CATHODE CONTAINING LANTHANUM OXIDE
Title (de)
QUECKSILBER-KURZBOGENLAMPE MIT LANTHANOXID-HALTIGER KATHODE
Title (fr)
LAMPE AU MERCURE A ARC COURT DOTEE D'UNE CATHODE CONTENANT DE L'OXYDE DE LANTHANE
Publication
Application
Priority
- DE 0300709 W 20030305
- DE 10209424 A 20020305
Abstract (en)
[origin: WO03075311A1] The invention relates to a mercury short-arched-high pressure discharge lamp (1) which operates with direct-current, comprising a discharge vessel (2) having two necks (4) arranged in a diametrical manner opposite each other, wherein an anode (26) and a cathode (7), made respectively from tungsten, are melted in a gas-tight manner and said vessel is filled with mercury and at least one inert gas. According to the invention, the material of the cathode tip (11) contains, in addition to the tungsten, lanthanum oxide La203 and the mercury content of the filling in the discharging vessel volume is at least 1 mg/cm3 and at the most 6 mg/cm3.
IPC 1-7
IPC 8 full level
H01J 61/06 (2006.01); H01J 61/073 (2006.01); H01J 61/20 (2006.01); H01J 61/82 (2006.01); H01J 61/86 (2006.01); H01J 61/88 (2006.01)
CPC (source: EP KR US)
H01J 61/073 (2013.01 - EP KR US); H01J 61/0737 (2013.01 - EP US); H01J 61/822 (2013.01 - EP US); H01J 61/86 (2013.01 - EP US)
Citation (search report)
See references of WO 03075311A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 03075311 A1 20030912; CN 1524284 A 20040825; DE 10209424 A1 20030918; EP 1481417 A1 20041201; JP 2005519436 A 20050630; KR 20040086728 A 20041012; TW 200304164 A 20030916; TW I275119 B 20070301; US 2004169476 A1 20040902
DOCDB simple family (application)
DE 0300709 W 20030305; CN 03800611 A 20030305; DE 10209424 A 20020305; EP 03717130 A 20030305; JP 2003573672 A 20030305; KR 20037015673 A 20031129; TW 92104422 A 20030303; US 48027803 A 20031211