EP 0100091 A3 19841024 - CERAMIC SEAL FOR HIGH PRESSURE SODIUM VAPOR LAMPS
Title (en)
CERAMIC SEAL FOR HIGH PRESSURE SODIUM VAPOR LAMPS
Publication
Application
Priority
US 40176282 A 19820726
Abstract (en)
[origin: EP0100091A2] Improved ceramic seals for both ends of a tubular light transmitting ceramic envelope used in sodium vapor lamps are disclosed to provide a more reliable hermetic seal. One end closure comprises a ceramic plug inserted into one end of the light transmitting envelope and being hermetically sealed to the inner wall of said envelope with ceramic sealing frit, said ceramic plug having a central opening through which extends one thermionic electrode inlead which is hermetically sealed at said opening with ceramic sealing frit, and having a transverse metal cross piece toined to said inlead. The remaining end closure comprises a ceramic disc having a larger diameter than the inner diameter of said light transmitting envelope which is hermetically sealed with ceramic sealing frit to the end of said light transmitting envelope as well as to the surface of a ceramic plug inserted into the end of said light transmitting envelope, with both said ceramic disc and ceramic plug having central openings through which extends an inlead and exhaust tube member for the remaining thermionic electrode and which is hermetically sealed at the central opening of said ceramic plug with ceramic sealing frit.
IPC 1-7
IPC 8 full level
H01J 61/36 (2006.01)
CPC (source: EP)
H01J 61/366 (2013.01)
Citation (search report)
- [YD] US 3992642 A 19761116 - MCVEY CHARLES I, et al
- [Y] US 3866280 A 19750218 - BARAKITIS NIKOLAOS
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0100091 A2 19840208; EP 0100091 A3 19841024; JP S5978440 A 19840507
DOCDB simple family (application)
EP 83107334 A 19830726; JP 13527783 A 19830726