EP 0401598 B1 19921028 - CENTRE ELECTRODE FOR SPARKING PLUGS OF INTERNAL COMBUSTION ENGINES
Title (en)
CENTRE ELECTRODE FOR SPARKING PLUGS OF INTERNAL COMBUSTION ENGINES
Publication
Application
Priority
DE 3918278 A 19890605
Abstract (en)
[origin: EP0401598A1] A centre electrode for sparking plugs of internal combustion engines, which has a core (7) consisting of a base-metal material of good thermal conductivity which is provided in the region of the sparking tip (6) with a noble-metal sheath (8) which consists of silver or of a silver alloy containing a predominant silver component, is to be improved such that no oxides or low-melting eutectic alloys occur at the interface between the core material and the sheath. The characteristic feature of the invention is to be regarded as the fact that at least one dividing layer (9), which is impermeable to oxygen and/or prevents the formation of a eutectic alloy between the core material and the material of the sheath, is provided at the interface between the core material (7) and the sheath (8). <IMAGE>
IPC 1-7
IPC 8 full level
H01T 13/39 (2006.01)
CPC (source: EP US)
H01T 13/39 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT
DOCDB simple family (publication)
EP 0401598 A1 19901212; EP 0401598 B1 19921028; DE 3918278 A1 19901206; DE 59000401 D1 19921203; US 5107169 A 19920421
DOCDB simple family (application)
EP 90109777 A 19900523; DE 3918278 A 19890605; DE 59000401 T 19900523; US 53066490 A 19900530