Central electrode for spark plugs having an interlayer between t

Details Central electrode for spark plugs having an interlayer between t Central electrode for spark plugs having an interlayer between t

1990-05-30

1992-04-21

O'Shea, Sandra L.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313355, H01T 1339

Patent

active

051071690

ABSTRACT:
A central electrode for spark plugs of internal-combustion engines, comprising a core of a highly heat-conductive base metallic material which is provided in the region of the firing tip with a precious metal casing consisting of silver or a silver alloy with predominantly silver content. At the boundary surface between the core material and the casing at least one interlayer is provided which is oxygen-impermeable and/or prevents the formation of a eutectic between the core material and the material of the casing.

REFERENCES:
patent: 1515866 (1924-11-01), Marten
patent: 2321840 (1943-06-01), McDougal
patent: 3857145 (1974-12-01), Yamaguchi et al.

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