Electrode structure for a spark plug

Details Electrode structure for a spark plug Electrode structure for a spark plug

1985-05-08

1987-04-21

DeMeo, Palmer C.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313 115, H01T 1316, H01T 1320

Patent

active

046599606

ABSTRACT:
A spark plug having a center electrode comprises a ceramic insulator whose leg portion is shaped at the tip in a bag form so as to close the insulator bore. A firing tip is provided at the bag-shaped tip in a face-to-face relation with a side electrode by fixing an electrode element made of a sinter of a ceramic powder containing particles of a size between 10 and 200 .mu.m which are coated with a noble metal to a thickness of 0.1-20 .mu.m. An electrode axis extends from the top end of the plug and is inserted through the insulator bore.

REFERENCES:
patent: 4144474 (1979-03-01), Nishio et al.
patent: 4400643 (1983-08-01), Nishio et al.
patent: 4414483 (1983-11-01), Nishio et al.
patent: 4427915 (1984-01-01), Nishio et al.

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