EP 0184876 A3 19881026 - HIGH-PRESSURE GAS-DISCHARGE LAMP HAVING A TUNGSTEN SHEET ELECTRODE
Title (en)
HIGH-PRESSURE GAS-DISCHARGE LAMP HAVING A TUNGSTEN SHEET ELECTRODE
Publication
Application
Priority
DE 3444922 A 19841208
Abstract (en)
[origin: US4700107A] An electrode head for a high-pressure discharge lamp consists of tungsten sheet material formed as a flat or curved plate having an elongated end face having a transverse dimension at least three or five times the plate thickness. As a result the discharge arc terminates practically in pointed form on the electrode end face, and the electrode is heated relatively slightly but has a large surface for thermal emission.
IPC 1-7
IPC 8 full level
H01J 61/36 (2006.01); H01J 61/073 (2006.01)
CPC (source: EP US)
H01J 61/0732 (2013.01 - EP US)
Citation (search report)
- [A] US 2508114 A 19500516 - JENNE JR FRANK
- [A] GB 527901 A 19401018 - RNC PAVEL MEISEL
- [A] FR 903909 A 19451022 - LICHT A G VEREINIGTE GLU HLAMP
- [A] US 1723929 A 19290806 - REGNIER FRANCOTTE
- [A] DE 712691 C 19411023 - SANITAS ELECTRICITAETS GMBH
- [AD] GB 530405 A 19401211 - ELECTRICITATSGESELLSCHAFT SANI
- [A] GB 1594976 A 19810805 - GEN ELECTRIC CO LTD
- [A] PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 66 (E-55)[738], 2. Mai 1981; & JP-A-56 015 545 (USHIO DENKI K.K.) 14-02-1981
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0184876 A2 19860618; EP 0184876 A3 19881026; CA 1249014 A 19890117; DE 3444922 A1 19860612; JP S61138446 A 19860625; US 4700107 A 19871013
DOCDB simple family (application)
EP 85201901 A 19851119; CA 496956 A 19851205; DE 3444922 A 19841208; JP 27262585 A 19851205; US 79952485 A 19851119