Synchronizing circuit

Claim 1

A SYNCHRONIZING CIRCUIT FOR A SEMI-CONDUCTOR CONTROLLED RECTIFIER SUPPLYING A LOAD WITH DIRECT CURRENT FROM AN A.C. SOURCE DURING POSITIVE HALF-CYCLES OF SAID SOURCE VOLTAGE, COMPRISING IN COMBINATION, A CONSTANT POTENTIAL D.C. VOLTAGE SOURCE MEANS, AN IMPEDANCE AND A CAPACITOR CONNECTED IN SERIES ACROSS A LOAD RESISTOR AND FIRST AND SECOND DIODE RECTIFIERS CONNECTED IN SERIES TO BE ENERGIZED FROM SAID SOURCE, SAID DIODE RECTIFIERS POLED IN THE SAME DIRECTION TO CONDUCT CURRENT DURING THE NEGATIVE HALF-CYCLES OF NONSAID D.C. VOLTAGE SOURCE MEANS, MEANS CONNECTING SAID FIRST DIODE RECTIFIER IN PARALLEL WITH SAID CAPACITOR SUCH THAT SAID CAPACITOR IS RECTIFIER TO PREVENT SAID CAPACITOR FROM CHARGING CLAMPING TO THE FORWASRD VOLTAGE DROP ACROSS SAID FIRST DURING SAID NEGATIVE HALF-CYCLES, A PULSE TRANSFORMER HAVING A SECONDARY CONNECTED TO FIRE SAID CONTROLLED RECTIFIER, A PRIMARY ON SAID PULSE TRANSFORMER, A UNIJUNCTION TRANSISTOR HAVING FIRST AND SECOND BASES AND AN EMITTER. MEANS CONNECTING SAID UNIJUNCTION TRANSISTOR BASES AND SAID PULSE TRANSFORMER PRIMARY IN SERIES ACROSS SAID CONSTANT POTENTIAL D.C. VOLTAGE SOURCE MEANS, SAID EMITTER BEING CONNECTED TO THE JUNCTION BETWEEN SAID IMPEDANCE AND CAPACITOR TO TRIGGER SAID UNIJUNCTION TRANSISTOR INTO CONDUCTION UPON THE CAPACITOR CONDUCTION OF SAID CONTROLLED RECTIFIER, CHARGING TO A PREDETERMINED VOLTAGE LEVEL FROM SAID D.C. VOLTAGE SOURCE MEANS, THE TRIGGERING OF SAID UNIJUNCTION TRANSISTOR CAUSING A PULSE TO BE DELIVERED FROM SAID PULSE TRANSFORMER TO FIRE SAID CONTROLLED RECTIFIER AT A CONTROLLED PHASE ANGLE DURING THE POSITIVE HALF-CYCLES OF THE SOURCE VOLTAGE.