Spark plug design having two electrically isolated center electr

Details Spark plug design having two electrically isolated center electr Spark plug design having two electrically isolated center electr

1976-06-21

1978-04-04

Rolinec, Rudolph V.

Electric lamp and discharge devices

Spark plugs

With particular connector structure

313136, H01T 1304

Patent

active

040829766

ABSTRACT:
A spark plug and connector assembly having a spark gap formed from two electrodes which are both electrically isolated from ground. The spark plug includes an insulator mounted in a tubular metal shell having a threaded end for engaging a corresponding opening into a combustion chamber in an internal combustion engine. The two electrodes are mounted within separate parallel bores through the insulator. Each electrode has a tip projecting from the insulator for defining the spark gap. The electrodes also have terminal ends which are recessed within the insulator bores. The electrode terminal ends are centered within and spaced from the walls of the bores. Tubular connectors attached to the ends of two high-voltage ignition cables are received within the insulator bores and slide telescopically onto the electrode terminal ends. The connectors are also recessed within the insulator bores to prevent arcing therebetween. The wires pass through a resilient insulating boot which tightly engages an annular groove on the exterior surface of the insulator.

REFERENCES:
patent: 3014150 (1961-12-01), Szilagyi
patent: 3048735 (1962-08-01), Ingram
patent: 3076113 (1963-01-01), Candelise

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