Small-sized spark plug having a spark gap parallel to an axis ru

Details Small-sized spark plug having a spark gap parallel to an axis ru Small-sized spark plug having a spark gap parallel to an axis ru

1985-07-24

1987-09-22

Moore, David K.

Electric lamp and discharge devices

Spark plugs

Non-conducting material in or adjacent gap

313138, 313142, H01T 1320

Patent

active

046957588

ABSTRACT:
A small-sized spark plug for internal combustion engines is disclosed which is composed of a center electrode having a shaft portion surrounded by an insulator layer and a terminal end portion adapted to act as a spark generation portion; and an earthed electrode having a terminal end portion which is spaced apart from and is opposite to the terminal end portion of the center electrode so that a spark gap is defined along a surface of the insulator layer. The shortest distance .delta. (mm) between each end portion of the two electrodes and the surface of the insulation layer and the distance l between the forward end portions of the two electrodes have the following relationship:

REFERENCES:
patent: 1962669 (1934-06-01), Parkin, Jr.
patent: 3313972 (1967-04-01), Beesch
patent: 3538372 (1970-11-01), Terao et al.
patent: 3558959 (1971-01-01), Ziemendorf
patent: 4110667 (1978-08-01), Graf Vom Hagen
patent: 4219003 (1980-08-01), Sato et al.
patent: 4329615 (1982-05-01), Tanaka et al.

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