Spark plug having a noble metal firing tip bonded to a front end

Details Spark plug having a noble metal firing tip bonded to a front end Spark plug having a noble metal firing tip bonded to a front end

1993-06-03

1995-08-08

O'Shea, Sandra L.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313144, 445 7, H01T 2102

Patent

active

054401984

ABSTRACT:
In a spark plug, a nickel-alloyed center electrode has a front end which has a constricted end forming a spark gap with a ground electrode by way of a noble metal firing tip. The noble metal firing tip is secured to a front end surface of the constricted end by applying a laser beam welding to an interface between the constricted end and the firing tip all through their circumferential length so as to form a wedge-shaped welding solidification portion.

REFERENCES:
patent: 4581558 (1986-04-01), Takamura et al.
patent: 4700103 (1987-10-01), Yamaguchi et al.
patent: 4803395 (1989-02-01), Matesco
patent: 4840594 (1989-06-01), Moore
patent: 4963112 (1990-10-01), Benedikt et al.
patent: 5210457 (1993-05-01), Oshima et al.

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