Abstract: An electrical connection between a high voltage terminal and a spark plug head. A case contains a high voltage terminal connected to a high voltage source. A connector portion extends from a bottom portion of the case, which in turn is secured to an insulator boot for attachment to a spark plug. The high voltage terminal has a nipple extending within the connector portion. A leaf spring member engages the nipple and is positively retained thereto. The head of the spark plug is inserted into the connector portion and engages the leaf spring member. The resilient characteristics of the leaf spring member provided by the interaction of the leaf spring member and the connector portion enable a compact yet positive connection system.

Abstract: An ignition coil for a spark ignition engine generally includes primary and secondary windings disposed about a magnetic core. The secondary winding is wound around a spool. The spool includes a cylindrical body having opposite first and second ends and a winding section between the ends. A conical winding surface at one of the ends tapers from a large diameter at the one end to a smaller diameter. A grooved surface extends axially toward another of the ends of the body and extends to adjacent the smaller diameter of the conical surface. The grooved surface contains longitudinally spaced continuous circular grooves that have unequally angled sides. The sides toward the one end are sloped at a greater angle relative to a radial direction than are the sides toward the other end. The secondary winding is wound around the winding section forming a plurality of turns of wire wound one over the other at a desired angle. The grooves are sized such that only one turn of the wire is disposed within each groove.