Electrical bridge networks and circuits including said networks

Claim 1

A BRIDGE CIRCUIT COMPRISING: A BRIDGE NETWORK HAVING A GIVEN VOLTAGE SENSITIVITY CONSISTING OF A FIRST TERMINAL, A SECOND TERMINAL, A FIRST CIRCUIT CONNECTED BETWEEN SAID FIRST AND SECOND TERMINALS CONSISTING OF FIRST AND SECOND REACTANCE MEANS CONNECTED IN SERIES RELATIONSHIP WITH RESPECT TO EACH OTHER, EACH OF SAID FIRST AND SECOND REACTANCE MEANS HAVING A GIVEN SIGN AND A GIVEN REACTANCE MAGNITUDE AT A PREDETERMINED FREQUENCY, AND A SECOND CIRCUIT CONNECTED BETWEEN SAID FIRST AND SECOND TERMINALS CONSISTING OF THIRD AND FOURTH REACTANCE MEANS CONNECTED IN SERIES RELATIONSHIP WITH RESPECT TO EACH OTHER, EACH OF SAID THIRD AND FOURTH REACTANCE MEANS HAVING SAID GIVEN SIGN AND SAID GIVEN REACTANCE MAGNITUDE AT SAID PREDETERMINED FREQUENCY; AND MEANS TO SUBSTANTIALLY INCREASE SAID GIVEN SENSITIVITY OF SAID BRIDGE NETWORK CONSISTING OF A THIRD CIRCUIT CONNECTED BETWEEN THE JUNCTION OF SAID FIRST AND SECOND REACTANCE MEANS AND THE JUNCTION OF SAID THIRD AND FOURTH REACTANCE MEANS CONSISTING OF A FIRST CONJUGATE REACTANCE MEANS HAVING A SIGN OPPOSITE TO SAID GIVEN SIGN AND A REACTANCE MAGNITUDE EQUAL TO SAID GIVEN REACTANCE MAGNITUDE AT SAID PREDETERMINED FREQUENCY, AND A FOURTH CIRCUIT CONNECTED BETWEEN SAID FIRST AND SECOND TERMINALS CONSISTING OF A SOURCE OF SIGNALS AND A SECOND CONJUGATE REACTANCE MEANS CONNECTED IN SERIES RELATIONSHIP WITH RESPECT TO EACH OTHER, THE SIGNAL OF SAID SOURCE OF SIGNAL HAVING A FREQUENCY EQUAL TOSAID PREDETERMINED FREQUENCY, AND SAID SECOND CONJUGATE REACTANCE MEANS HAVING A SIGN OPPOSITE TO SAID GIVEN SIGN AND A REACTANCE MAGNITUDE EQUAL TO SAID GIVEN REACTANCE MAGNITUDE AT SAID PREDETERMINED FREQUENCY.