Distributor for multi-cylinder engine

Claim 1

An improvement for an ignition system for an engine having at least first and second sparkplugs; a distributor comprising a distributor housing containing a rotor, a stationary contact point, a movable contact point, and spring means normally holding said movable contact point in a closed position in contact with said stationary contact point, said movable contact point being yieldably movable to an open position in spaced relation to said stationary contact point, said rotor having two lobes and being rotatably mounted for causing said two lobes to engage said movable contact point and cause said movable contact point to move to said open position twice during each revolution of said rotor; an electrical power circuit connected to said contact points and including an outlet connection for causing electrical current to be introduced to said outlet connection each time said movable contact point is moved to said open position; wherein the improvement comprises: a single discharge coil having an inlet terminal connected to said outlet connection of said power circuit and having a single discharge post; a circular dielectric disk having an upwardly presented circular surface and having connection means integral with said disk and being in direct retentive engagement with said rotor for causing rotation of said disk in unison with said rotor; a pie-shaped conductive sheet having a narrow end and a wide end and being attached to said upwardly presented circular surface of said disk, with said narrow end located at the center of said disk and with said wide end located adjacent the outer circumference of said disk; a distributor cap detachably secured in fixed relation to said distributor housing, said cap comprising a coil wire connected to said discharge post of said discharge coil, a first sparkplug wire connected to said first sparkplug, and a second sparkplug wire connected to said second sparkplug, said distributor cap having a downwardly presented surface, first and second sparkplug contacts and a central contact means being mounted on said downwardly presented surface, said first and second sparkplug contacts being connected to said first and second sparkplug wires and said central contact means being connected to said coil wire; said central contact means being in electrical contact with said narrow end of said pie-shaped conductive sheet at all times during rotation of said disk in unison with said rotor; said first and second sparkplug contacts being positioned to be contacted sequentially one at a time by said wide end of said pie-shaped conductive sheet during each revolution of said disk in unison with said rotor; said wide end of said pie-shaped conductive sheet being sufficiently wide and being positioned relative to said rotor and relative to said first and second sparkplug contacts so as always to be in electrical contact with one of said first and second sparkplug contacts whenever said rotor moves said movable contact point to said open position.