Spark plug and the method of manufacturing the same

Details Spark plug and the method of manufacturing the same Spark plug and the method of manufacturing the same

1985-03-18

1990-01-09

Wieder, Kenneth

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313136, H01T 1320

Patent

active

048930512

ABSTRACT:
A spark plug for internal combustion engines provided with a noble metal tip on the pointed top of a spark plug center electrode. The noble metal tip is welded to the center electrode top end by heating and pressing the portion to be welded. After the welding, the center electrode is shaped to provide the pointed top. The noble metal tip is a platinum alloy consisting of platinum of 85 through 70 in weight percentage and iridium of 15 through 30 in weight percentage.

REFERENCES:
patent: 3146370 (1964-08-01), Van Duyne et al.
patent: 4122366 (1978-10-01), Von Stutterheim et al.
patent: 4465952 (1984-08-01), Sato et al.
patent: 4488081 (1984-12-01), Kondo et al.

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