Power measuring rectifier bridge circuit including exponential impedance means in the bridge diagonal

Claim 1

IN AN ELECTRICAL MEASURING INSTRUMENT OF THE WATTMETER TYPE FOR MULTIPLYING A PLURALITY OF A.C. ELECTRICAL SIGNALS, A BRIDGE CIRCUIT COMPRISING FOUR SERIALLY CONNECTED IMPEDANCE ARMS INCLUDING FIRST AND SECOND ADJACENT ARMS CONNECTED TOGETHER AT A FIRST JUNCTION, AND THIRD AND FOURTH ADJACENT ARMS CONNECTED TOGETHER AT A SECOND JUNCTION, MEANS TO INTRODUCE INTO SAID FIRST AND SECOND ARMS A.-C. SIGNALS OF EQUAL VALUE, EACH OF SAID EAUAL VALUE SIGNALS BEING PROPORTIONAL TO A FIRST A.-C. ELECTRICAL SIGNAL, AN EXPONENTIAL IMPEDANCE MEANS CONNECTED BETWEEN SAID FIRST AND SECOND JUNCTIONS AND EXHIBITING AN EQUIVALENT EXPONENT IN SAID BRIDGE CIRCUIT OF TWO, MEANS TO INTRODUCE A SECOND A.-C. ELECTRICAL SIGNAL IN SERIES WITH SAID EXPONENTIAL IMPEDANCE BETWEEN SAID FIRST AND SECOND JUNCTIONS, AND MEANS TO MEASURE THE AVERAGE DIFFERENCE BETWEEN THE CURRENTS FLOWING IN SAID THIRD AND FOURTH ARMS, SAID FIRST AND SECOND ARMS FURTHER COMPRISING FIRST AND SECOND RECTIFIERS, RESPECTIVELY, SAID RECTIFIERS BEING POLARIZED WITH RESPECT TO THEIR ASSOCIATED EQUAL VALUE SIGNAL SO THAT THEY ARE ALTERNATELY FORWARD BIASED IN RESPONSE TO ALTERNATE HALF CYCLES OF SAID FIRST SIGNAL WHEREBY A DIRECT CURRENT OUTPUT SIGNAL PROPORTIONAL TO THE PRODUCT OF SAID FIRST AND SECOND A.-C. SIGNALS IS DEVELOPED IN SAID THIRD AND FOURTH ARMS.