EP 0054374 A2 19820623 - Spark plug electrode and its method of manufacture.
Title (en)
Spark plug electrode and its method of manufacture.
Title (de)
Zündkerzenelektrode und Verfahren zu ihrer Herstellung.
Title (fr)
Electrode de bougie et procédé pour sa fabrication.
Publication
Application
Priority
GB 8039567 A 19801210
Abstract (en)
In a method of making a spark plug centre electrode, a billet (12) of a first metal which has good thermal conductivity is placed within a cup-shaped billet (10) of a second metal having good corrosion resistance, the first metal being melted within the cup-shaped billet of the second metal and, subsequent to cooling, the composite billet is extruded through an extrusion die (17) to form a composite centre electrode in which a core of the first metal is enclosed substantially entirely within a sheath of the second metal.
IPC 1-7
IPC 8 full level
B21C 23/22 (2006.01); H01T 13/39 (2006.01); H01T 21/02 (2006.01)
CPC (source: EP)
B21C 23/22 (2013.01); H01T 13/39 (2013.01); H01T 21/02 (2013.01)
Designated contracting state (EPC)
BE DE FR GB IT
DOCDB simple family (publication)
EP 0054374 A2 19820623; EP 0054374 A3 19820721; EP 0054374 B1 19850313; AU 551102 B2 19860417; AU 7813781 A 19820617; CA 1203510 A 19860422; DE 3169299 D1 19850418; GB 2088753 A 19820616; GB 2088753 B 19840201; NZ 199163 A 19840928; ZA 818375 B 19821124
DOCDB simple family (application)
EP 81305642 A 19811127; AU 7813781 A 19811201; CA 391650 A 19811207; DE 3169299 T 19811127; GB 8039567 A 19801210; NZ 19916381 A 19811203; ZA 818375 A 19811203