Method of making a spark plug including laser welding a noble me

Details Method of making a spark plug including laser welding a noble me Method of making a spark plug including laser welding a noble me

1996-07-08

1998-04-07

O'Shea, Sandra L.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313144, 445 9, H01T 2102

Patent

active

057368090

ABSTRACT:
In a spark plug having a noble metal layer disposed on a firing end of an electrode, the noble metal layer being laser welded to the firing end of the electrode, and subsequently heat treated to increase a crystallized granulation particle size of the noble metal layer.

REFERENCES:
patent: 4743793 (1988-05-01), Toya et al.
patent: 5440198 (1995-08-01), Oshima et al.

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