Double integrator magnetic amplifier output circuit

Claim 1

MAGNETIC AMPLIFIER APPARATUS FOR PRODUCING A SINUSOIDAL ALTERNATING CURRENT OUTPUT LINEARLY PROPORTIONAL TO A CONTROL CURRENT, COMPRISING FIRST, SECOND, THIRD AND FOURTH SATURABLE REACTORS, A LOAD CIRCUIT, A CONTROL CIRCUIT, SAID LOAD CIRCUIT INCLUDING A WINDING ON EACH OF SAID CORES, SAID CONTROL CIRCUIT INCLUDING A WINDING ON ERACH OF SAID CORES, A LOAD CIRCUIT OUTPUT RESISTANCE MEANS, AN A.C. VOLTAGE SOURCE, MEANS CONNECTING SAID SOURCE TO SAID LOAD CIRCUIT WHEREBY AN OUTPUT VOLTAGE MAY BE PRODUCED ACROSS SID OUTPUT RESISTANCE MEANS, AN INTEGRATING CIRCUIT COMPRISING A FIRST INTEGRATING MEANS CONNECTED ACROSS SAID OUTPUT RESISTANCE MEANS, A SECOND INTEGRATING MEANS INCLUDING A TAPE RECORDER HEAD CONNECTED ACROSS A PORTION OF SAID FIRST INTEGRATING MEANS WHEREBY BY A SINUSOIDAL VOLTAGE IS PRODUCED IN SAID TAPE RECORDER HEAD, A POLARITY REVERSIBLE VOLTAGE CONNECTED TO SAID CONTROL CIRCUIT WHEREBY THE MAGNITUDE OF SID SINUSOIDAL VOLTAGE MAY BE CONTROLLED.