Spark plug having combined surface and air gaps

Details Spark plug having combined surface and air gaps Spark plug having combined surface and air gaps

1989-05-18

1990-10-16

O'Shea, Sandra L.

Electric lamp and discharge devices

Spark plugs

Non-conducting material in or adjacent gap

313143, H01T 1352

Patent

active

049637843

ABSTRACT:
A spark plug with combined surface discharge and air discharge gaps, wherein a central electrode (3), an insulator (2) surrounding the central electrode, and a ground electrode (4) surrounding the insulator (2) together with a spark plug body (1) are provided. The insulator (2) forms at its end portion a discharge chamber (5) through which the central electrode (3) extends axially as far as the end portion of the spark plug body (1). The earth electrode surrounds the insulator (2) around its end with a projection extending into the discharge chamber (5).

REFERENCES:
patent: 3890519 (1975-06-01), Chafer et al.
patent: 4795937 (1989-01-01), Wagner et al.

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