Method of making a spark plug

Details Method of making a spark plug Method of making a spark plug

2005-08-02

2005-08-02

Williams, Joseph (Department: 2879)

Electric lamp or space discharge component or device manufacturi

Process

Spark plug or spark gap making

C313S141000, C029S03300H, C029S03300H, C123S1690EL

Reexamination Certificate

active

06923699

ABSTRACT:
A method of making a spark plug having a noble metal chip joined to an electrode main body of a ground electrode by interposing therebetween an intermediate member. The method comprises the steps of prior to joining the noble metal chip to the electrode main body, joining the intermediate member and the noble metal chip together, placing a noble metal chip and intermediate member assembly on the electrode main body in a way as to allow the intermediate member to contact the electrode main body, and welding the electrode main body and the intermediate member together while restricting relative movement of the electrode main body and the intermediate member without applying an urging force to a joint between the intermediate member and the noble metal chip.

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