Off center electrode spark plug

Details Off center electrode spark plug Off center electrode spark plug

1976-12-16

1978-07-18

Grimm, Siegfried H.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

123169EL, H01T 1320

Patent

active

041017978

ABSTRACT:
Disclosed is an improved spark plug in which a projection is provided at the end face of a central electrode and an earthing electrode is fixed by projection weld to the end surface of a main body to form a small gap between an outer angular portion of said projection and an underside angular portion of the nose of said earthing electrode, and which makes it possible to use a dilute air/fuel mixture and, hence, to decrease an amount of harmful exhaust gases.

REFERENCES:
patent: 1279974 (1918-09-01), Blomster et al.
patent: 1353785 (1920-09-01), Platt
patent: 1354945 (1920-10-01), Blomster et al.
patent: 2159791 (1939-05-01), Fruth
patent: 2324616 (1943-07-01), D'Elia

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