Means and techniques for producing a reciprocal of an electrical quantity

Claim 1

IN A SYSTEM OF THE CHARACTER DESCRIBED WHEREIN IT IS DESIRED TO OBTAIN THE MATHEMATICAL RECIPROCAL OF A VARYING SIGNAL, THE COMBINATION COMPRISING, A SOURCE OF SAID VARYING VOLTAGE, A VARIABLE FREQUENCY OSCILLATION MEANS, CONSTANT FREQUENCY OSCILLATION MEANS, MIXING MEANS COUPLED TO BOTH SAID VARIABLE FREQUENCY AND SAID CONSTANT FREQUENCY MEANS AND FUNCTIONING TO DERIVE A VOLTAGE OUTPUT CHARACTERIZED BY A BEAT FREQUENCY IN ACCORDANCE WITH THE DIFFERENCE OF SAID VARYING FREQUENCY SOURCE AND SAID CONSTANT FREQUENCY SOURCE, MEANS CONTROLLING SAID VARIABLE FREQUENCY MEANS IN ACCORDANCE WITH BOTH SAID VARIABLE SIGNAL AND SAID BEAT FREQUENCY VOLTAGE, IMPEDANCE MEANS HAVING A MAGNITUDE WHICH VARIES INVERSELY WITH RESPECT TO FREQUENCY, MEANS APPLYING SAID VOLTAGE OUTPUT TO THE LAST MENTIONED MEANS, AND MEANS INDICATING THE VOLTAGE PRODUCED ACROSS SAID IMPEDANCE MEANS BY SAID VOLTAGE OUTPUT, SAID LAST MENTIONED VOLTAGE ACROSS SAID IMPEDANCE MEANS VARYING IN AMPLITUDE IN RECIPROCAL RELATIONSHIP WITH RESPECT TO SAID VARYING VOLTAGE, SAID VARIABLE FREQUENCY SOURCE AND SAID CONSTANT FREQUENCY SOURCE EACH COMPRISING A MULTIVIBRATOR, AND SAID MEANS WHEREBY SAID VARIABLE FREQUENCY SOURCE IS CONTROLLED BY SAID BEAT FREQUENCY VOLTAGE COMPRISES MEANS WHEREBY SAID BEAT FREQUENCY VOLTAGE IS FIRST LIMITED IN AMPLITUDE, THEN DIFFERENTIATED AND COMBINED WITH SAID VARYING SIGNAL TO PRODUCE A MODIFIED BEAT FREQUENCY VOLTAGE WHICH TOGETHER WITH SAID VARYING SIGNAL CONTROLS SAID VARIABLE FREQUENCY SOURCE.