Patent ID: 6833658
Filing Date: 2004-12-21
Classification: H01T,Y10T

Abstract:
A middle electrode with precious metal reinforcement wherein the middle electrode has a tapered ignition tip comprising:a precious metal wire section with a face side and a flat side, the wire section being bordered on the face side by sharp edges, the flat side having been welded onto the tapered ignition tip and the wire section having been cut off at a desired height to form the face side, and an alloy area around an area of contact of the flat side of the precious metal wire section with a tapered ignition tip, the alloy area extending annularly between the precious metal wire section and the material of the tapered ignition tip of the middle electrode, wherein the alloy area has been formed by external welding of the precious metal wire section applied to the contact area of the precious metal wire section and the tapered ignition tip.