Spark plug

Details Spark plug Spark plug

1980-02-22

1982-05-25

La Roche, Eugene

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313139, 313142, H01T 1332

Patent

active

043318991

ABSTRACT:
A spark plug comprises a center electrode fixed to a leg portion which is exposed into the combustion chamber of an engine and comprises a ground electrode which is bent so that its end opposes the forward end of the center electrode whereby discharge is produced between the ground electrode and the center electrode. The ground electrode includes a discharging surface not opposing a first side end portion of the center electrode which is near the bent portion, but opposing a second side end portion of the center electrode which is remote from the bent portion of the ground electrode. The discharging surface of the ground electrode may be provided by forming a projection or groove at the opposing end of the ground electrode.

REFERENCES:
patent: 1537586 (1925-05-01), Champion
patent: 4109633 (1978-08-01), Mitsudo et al.

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