Spark plug

Details Spark plug Spark plug

1977-01-03

1978-10-24

Rolinec, Rudolph V.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313142, H01T 1320

Patent

active

041223667

ABSTRACT:
Spark plug for internal combustion engines with center and ground electrodes consisting of base metals, base metal alloys, or metallic composite materials, said center electrode or both electrodes being coated at least on their ignition areas with a metal or metal alloy having an average atomic weight of more than 100 and a melting point above 1500.degree. C. The metal coating is deposited by crystalline growth on the electrode surface in a thickness of 5 to 100 microns, preferably 15 to 60 microns using the vapor deposition technique or molten salt electrolysis. The cap-shaped coating is applied to the frustro-conical ignition area of the center electrode.

REFERENCES:
patent: 3958144 (1976-05-01), Franks
patent: 3967149 (1976-06-01), Eaton et al.

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