Pulse generators for phase controlled systems

Claim 1

IN APPARATUS FOR PRODUCING AT LEAST ONE TRAIN OF PULSES DURING EACH CYCLE OF AN INPUT ALTERNATING CURRENT VOLTAGE, AND WHEREIN THE PHASE RELATIONSHIP OF THE FIRST PULSE IN EACH TRAIN WITH RESPECT TO THE STARTING POINT OF A CYCLE OF SAID ALTERNATING CURRENT VOLTAGE MAY BE VARIED; THE COMBINATION OF AN OSCILLATOR HAVING A NORMALLY CUTOFF TRANSISTOR THEREIN AND ADAPTED TO PRODUCE SAID TRAIN OF PULSES WHEN THE TRANSISTOR IS RENDERED CONDUCTIVE DURING A CYCLE OF SAID ALTERNATING CURRENT VOLTAGE, A CAPACITOR, MEANS FOR CHARGING SAID CAPACITOR AT LEAST ONCE DURING EACH CYCLE OF SAID ALTERNATING CURRENT VOLTAGE, A BIDIRECTIONAL CURRENT PATH CONNECTING ONE TERMINAL OF SAID CAPACITOR TO THE BASE OF SAID TRANSISTOR WHEREBY THE TRANSISTOR WILL BE RENDERED CONDUCTIVE WHEN THE VOLTAGE ACROSS THE CAPACITOR EXCEEDS A PREDETERMINED MAGNITUDE, AND MEANS FOR CONTROLLING THE TIME DURING A CYCLE OF SAID ALTERNATING CURRENT VOLTAGE REQUIRED TO CHARGE THE CAPACITOR TO A VOLTAGE EXCEEDING SAID PREDETERMINED MAGNITUDE.