High voltage ignition arrangement for internal combustion engines

Claim 1

IN A HIGH VOLTAGE IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES, IN COMBINATION, AN IGNITION DISTRIBUTOR HAVING A SHAFT OPERABLE BY THE ENGINE; A SOURCE OF DIRECT CURRENT SUPPLY; AN IGNITION COIL HAVING A PRIMARY COIL AND A SECONDARY COIL, THE LATTER FURNISHING AN IGNITION PULSE TO SAID IGNITION DISTRIBUTOR EVERY TIME WHEN DIRECT CURRENT SUPPLIED TO SAID PRIMARY COIL IS INTERRUPTED; CIRCUIT MEANS FOR SUPPLYING SAID PRIMARY COIL WITH DIRECT CURRENT AND INCLUDING TRANSISTOR MEANS HAVING AN EMITTER, A COLLECTOR AND A BASE, THE EMITTER-COLLECTOR CIRCUIT OF SAID TRANSISTOR MEANS BEING CONNECTED IN SERIES WITH SAID PRIMARY COIL BETWEEN THE TERMINALS OF SAID SOURCE, SAID TRANSISTOR MEANS PERMITTING, WHEN IN CONDUCTIVE CONDITION, DIRECT CURRENT TO FLOW THROUGH SAID PRIMARY COIL, AND INTERRUPTING SAID CURRENT WHEN RENDERED NON-CONDUCTIVE; VOLTAGE DIVIDER MEANS INCLUDING TWO RESISTOR MEANS CONNECTED IN SERIES-COMBINATION BETWEEN SAID TERMINALS OF SAID SOURCE, SAID BASE OF SAID TRANSISTOR MEANS BEING CONNECTED WITH THE JUNCTION POINT BETWEEN SAID TWO RESISTORS, A THIRD RESISTOR BEING ARRANGED BETWEEN SAID JUNCTION POINT AND SAID BASE FOR APPLYING A POTENTIAL TO THE LATTER WHEREBY SAID TRANSISTOR MEANS IS RENDERED CONDUCTIVE; AND IMPULSE GENERATOR MEANS CONNECTED WITH SAID BASE OF SAID TRANSISTOR MEANS FOR APPLYING TO THE LATTER INTERMITTENTLY IN RHYTHM WITH THE OPERATION OF THE ENGINE VOLTAGE PULSES ADAPTED TO RENDER SAID TRANSISTOR MEANS NON-CONDUCTIVE FOR BRIEF INTERVALS BETWEEN COMPARATIVELY LONG PERIODS OF CONDUCTIVITY.