Spark plug

Details Spark plug Spark plug

1974-11-06

1976-06-29

Dost, Gerald A.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

29 2512, H01T 1320

Patent

active

039671496

ABSTRACT:
This invention relates to spark plugs for internal combustion engines and is particularly directed to a center electrode having a sparking tip composed of a precious metal and to the method of making the same. The known advantage of the use of a precious metal electrode is that considerably greater spark plug life is achieved. The invention achieves the advantage while greatly reducing the mass of precious metal employed. A further feature of the invention is the co-planar disposition of the end of the center electrode and its supporting insulator.

REFERENCES:
patent: 2013411 (1935-09-01), Hummel
patent: 2257566 (1941-09-01), Lewis
patent: 2296033 (1942-09-01), Heller
patent: 2691915 (1954-10-01), Cherry
patent: 2910983 (1959-11-01), Everett
patent: 3146370 (1964-08-01), Duyne et al.
patent: 3407326 (1968-10-01), Romine

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