Signal detecting and amplifying circuit utilizing a saturable core

Claim 1

A SELF-OSCILLATING ELECTRONIC MAGNETOMETER CIRCUIT COMPRISING A FIRST AND A SECOND TRANSISTOR, EACH OF SAID TRANSISTORS HAVING A COLLECTOR, AN EMITTER AND A BASE, A TRANSFORMER HAVING A STRAIGHT BAR SATURABLE CORE AND A PRIMARY WINDING THEREON, SAID EMITTER OF SAID FIRST TRANSISTOR BEING DIRECTLY CONNECTED TO SAID COLLECTOR OF SAID SECOND TRANSISTOR AND TO A FIRST COMMON JUNCTION, A CONTROL CIRCUIT FOR SAID FIRST TRANSISTOR CONNECTED BETWEEN SAID EMITTER AND SAID BASE OF SAID FIRST TRANSISTOR AND INCLUDING A FIRST SECONDARY WINDING ON SAID SATURABLE CORE OF SAID TRANSFORMER, A CONTROL CIRCUIT FOR SAID SECOND TRANSISTOR CONNECTED BETWEEN SAID EMITTER ANSD SAID BASE OF SAID SECOND TRANSISTOR AND INCLUDING A SECOND SECONDARY WINDING ON SAID SATURABLE CORE OF SAID TRANSFORMER, SAID SECOND SECONDARY WINDING BEING OPPOSITELY PHASED FROM SAID FIRST SECONDARY WINDING WITH RESPECT TO MAGNETIC FLUX IN SAID CORE, A FIRST AND A SECOND UNIDIRECTIONAL ENERGY SOURCE SERIALLY CONNECTED BETWEEN SAID COLLECTOR OF SAID FIRST TRANSISTOR AND SAID EMITTER OF SAID SECOND TRANSISTOR, A SECOND COMMOIN JUNCTION INTERMEDIATE SAID FIRST ANID SECOND ENERGY SOURCE, A POSITIVE FEEDBACK CONNECTION INCLUDING SAID PRIMARY WINDING CONNECTED IN A DIRECT CURRENT CONDUCTIVE PATH BETWEEN SAID FIRST COMMON JUNCTION AND SAID SECOND COMMON JUNCTION WHEREBY TO PRODUCE SAID SELF-OSCILLATION IN SAID CIRCUIT TO PRODUCE A NORMALLY SYMMETRICAL SQUARE-WAVE SIGNAL, SAID STRAIGHT BAR SATURABLE CORE OF SAID TRANSFORMER BEING RESPONSIVE TO EXTERNAL MAGNETIC FIELDS TO UNBALANCE THE OSCILLATING OPERATION OF SAID CIRCUIT TO PRODUCE AN ASYMMETRICAL SQUARE-WAVE SIGNAL THE ASYMMETRY OF WHICH IS PROPORTIONAL TO THE STRENGTH OF SAID MAGNETIC FIELD, AND A SIGNAL AVERAGING OUTPUT CIRCUIT CONNECTED BETWEEN SAID FIRST AND SECOND COMMON JUNCTIONS.