Spark plug and its electrode configuration

Details Spark plug and its electrode configuration Spark plug and its electrode configuration

1985-08-07

1987-10-13

Moore, David K.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313142, H01T 1334

Patent

active

047001038

ABSTRACT:
A spark plug in which a noble metal tip welded to the leading end face of a center electrode is in the form of a fine wire while a noble metal tip welded to the leading end face of a ground electrode is in the form of a wire or column; and when each of the noble metal tips is electrically welded to the leading end face of the center or ground electrode, the end of the noble metal tip in contact with the leading end face of the center or ground electrode is enlarged to form a flange. Therefore the strength between the welded joint between the noble metal tip and the center or ground electrode is satisfactorily increased.

REFERENCES:
patent: 2239561 (1941-04-01), Hopps
patent: 2296033 (1942-09-01), Heller
patent: 3548239 (1970-12-01), Eaton
patent: 3868530 (1975-02-01), Eaton et al.
patent: 4414483 (1983-11-01), Nishio et al.
patent: 4514657 (1985-04-01), Igashira et al.

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