Spark plug

Details Spark plug Spark plug

1979-06-05

1982-06-22

Demeo, Palmer C.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

H01T 1320

Patent

active

043364772

ABSTRACT:
A spark plug where parts of a center electrode on both sides of an outer electrode are projected toward the outer electrode and a groove is formed in the outer electrode by cutting or grinding the central portion of said end surface. Discharge gaps are formed between on the outer projecting surfaces and the outer electrode.

REFERENCES:
patent: 1620341 (1927-03-01), Gardner
patent: 2120492 (1938-06-01), Graf
patent: 3970885 (1976-07-01), Kasima
patent: 4109633 (1978-08-01), Mitsudo et al.

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