Feedback system for high speed magnetic deflection

Claim 1

IN COMBINATION IN A DEFLECTION SYSTEM, TWO COAXIAL DEFLECTION COILS; A FIRST AND A SECOND TRANSISTOR SAID TRANSISTORS HAVING A COMMON EMITTER CIRCUIT WITH OUTPUT CIRCUITS, RESPECTIVELY, IN SERIES WITH SAID COILS; A DIRECT CURRENT POWER SOURCE OF A PREDETERMINED NORMAL VOLTAGE, THE TRANSISTOR-COIL CIRCUITS BEING CONNECTED IN PARALLEL ACROSS SAID POWER SOURCE; A DIFFERENTIAL AMPLIFIER COMPRISING THIRD AND FOURTH TRANSISTORS WITH A COMMON EMITTER CIRCUIT, A SYNCHRONIZING PULSE SOURCE COUPLED TO SAID DIFFERENTIAL AMPLIFER; A FEEDBACK CIRCUIT CONNECTED BETWEEN EACH COIL AND THE OUT-OF-PHASE CONTROL ELECTRODE OF THE THIRD AND FOURTH TRANSISTORS TO REGULATE CURRENT THROUGH SAID COILS; A CURRENT CONTROL TRANSISTOR, THE COLLECTOR-EMITTER CIRCUIT OF SAID CONTROL TRANSISTOR BEING CONNECTED IN THE MENTIONED COMMON EMITTER CIRCUIT OF SAID DIFFERENTIAL AMPLIFIER, THE CONTROL ELECTRODE OF SAID CONTROL TRANSISTOR BEING CONNECTED TO THE MENTIONED COMMON EMITTER CIRCUIT OF SAID FIRST AND SECOND TRANSISTORS SO THAT TRANSIENT VOLTAGES APPLIED IN PHASE TO SAID COILS DOES NOT DISTURB VOLTAGE-WISE THE CONDUCTION THROUGH EITHER THE TRANSISTOR-COIL CIRCUIT OR THE DIFFERENTIAL AMPLIFIERS.