Electronic system responsive to opposite senses of condition deviation

Claim 1

AN ELECTRONIC SYSTEM AFFORDIG SELECTIVE MODULATING CONTROL OVER ONE OF TWO LOAD DEVICES IN ACCORDANCE WITH THE SENSE AND MAGNITUDE OF THE DEVIATION OF A CONDITION FROM A PREDETERMINED VALUE, COMPRISING NETWORK MEANS INCLUDING A FIRST ENERGIZING WINDING HAVING A CENTER-TAPPED FIRST TERMINAL, A SECOND TERMINAL, AND A PAIR OF BRANCHES EACH CONNECTED AT ONE END WITH SAID SECOND TERMINAL AND AT THE OTHER END WITH OPPOSITE ENDS OF SAID WINDING, EACH OF SAID BRANCHES INCLUDING IN SERIES A CURRENT-RESPONSIVE LOAD AND A UNI-DIRECTIONALLY CONDUCTIVE DEVICE, SAID DEVICES HAVING THE SAME POLARITY RELATIVE TO SAID SECOND TERMINAL; CURRENT-CONTROLLING MEANS COMPRISING A PAIR OF POWER CIRCUIT ELECTRODES CONNECTED WITH SAID NETWORK TERMINALS, RESPECTIVELY, AND A CONTROL ELECTRODE; NORMALLY-BALANCED ALTERNATING CURRENT CONDITION-RESPONSIVE BRIDGE NETWORK MEANS CONNECTED WITH SAID CONTROL ELECTRODE FOR REGULATING THE CURRENT FLOW BETWEEN SAID POWER CIRCUIT ELECTRODES, SAID BRIDGE NETWORK MEANS INCLUDING A SECOND CENTER TAPPED ALTER-