Dual internal electric spark plug

Abstract From the Canadian patent

This spark plug consists primarily of a metal body having, insulator means, in which is secured a pair of spaced apart electrodes which will engage, each, high tension wires of an internal combustion engine's ignition system. On the opposite end of the spark plug the, electrodes are terminated, and extend from an insulator portion so as to, provide spark gap means between a pair of ground anvils which are spaced, apart from an inner insulator shield.