SPARK-PLUG FOR INTERNAL COMBUSTION ENGINE

摘要

A spark-plug has a cone or cylinder-shaped projection portion at which there are three round equidistantly spaced holes, a metal rod is arranged inside the projection portion from which three electrodes extend at an equal angle therebetween, each electrode has a globe-shaped tip. Three electrodes are directed into the holes in the projection portion by their tips through which the burning mix ignites. Since the distance between the tips and the projection portion holes is equal then sparking will be stable and equal at all tips relative to the projection portion hole walls.