Measuring apparatus for the degree of supersaturation of solutions

Claim 1

APPARATUS FOR MEASURING THE DEGREE OF SATURATION OF A BOILING SOLUTION, COMPRISING A BRIDGE CIRCUIT HAVING A PAIR OF INPUT TERMINALS, A PAIR OF OUTPUT TERMINALS, AND FOUR BRIDGE ARMS INTERCONNECTING SAID TERMINALS, A FIRST RESISTANCE THERMOMETER ELEMENT CONNECTED IN ONE OF SAID ARMS AND ADAPTED TO EXPOSED TO THE TEMPERATURE OF THE BIOLING SOLUTION, FIRST, SECOND, AND THIRD RESISTORS RESPECTIVELY CONNECTED IN EACH OF THE OTHER OF SAID ARMS, ENERGIZING CONDUCTORS CONNECTED TO SAID INPUT TERMINALS AND ADAPTED TO CONNECT THE LATTER ACROSS A SOURCE OF ENERGIZING VOLTAGE, A FOURTH RESISTOR CONNECTED BETWEEN SAID OUTPUT TERMINALS, A SECOND RESISTANCE THERMOMETER ELEMENT ADAPTED TO BE EXPOSED TO THE TEMPERATURE OF THE SOLVENT OF SAID SOLUTION BOILING OAT SUBSTANTIALLY THE SAME PRESSURE AS SAID SOLUTION, MEANS CONNECTING SAID SECOND ELEMENT AND A FIFTH RESISTOR IN A SERIES CIRCUIT BETWEEN ENERGIZING DUCTORS ADAPTED TO BE CONNECTED ACROSS A SOURCE OF ENERGIZING VOLTAGE, A SIXTH RESISTOR CONNECTED IN PARELLEL WITH AT LEAST A PORTION OF SAID RESISTOR, A CONDUCTOR CONNECTING ONE END OF SAID SIXTH RESISTOR TO A TERMINAL ADJUSTABLE ON THE LATTER, A SEVENTH RESISTOR CONNECTED BETWEEN ENERGIZING CONDUCTORS ADAPTED TO BE CONNECTED ACROSS A SOURCE OF ENERGIZING VOLTAGE, FIRST AND SECOND TERMINALS LOCATED IN SAID SERIES CIRCUIT AND BETWEEN WHICH THERE IS PRODUCED A FIRST VOLTAGE, ONE OF SAID FIRST AND SECOND TERMINALS BEING ADJUSTABLE ON SAID FIFTH RESISTOR, THIRD AND FORTH TERMINALS LOCATED ON SAID SEVENTH RESISTOR AND BETWEEN WHICH THERE IS PRODUCED A SECOND VOLTAGE, ONE OF SAID THIRD AND FOURTH TERMINALS BEING ADJUSTABLE ON SAID SEVENTH RESISTOR, FIFTH ANDS SIXTHE TERMINALS ADJUSTABLE, RESPECTIVELY, ON SAID FIRST AND FOURTH RESISTORS AND BETWEEN WHICH THERE IS PRODUCED A THIRD VOLTAGE, CONDUCTOR MEANS CONNECTING SAID FIRST, SECOND, THIRD, AND FOURTH TERMINALS AND THE PORTIONS OF SAID FIFTH AND SEVENTH RESISTORS BETWEEN THESE TERMINALS IN A SERIES CIRCUIT BETWEEN SAID FIFTH SIXTH TERMINALS A CURRENT DECTOR CONNECTED IN SERIES IN SAID CONDUCTOR MEANS, THE POLARITIES OF SAID ENERGIZING CONDUCTORS BEING SO RELATED THAT THE ALGEBRAIC SUM OF SAID FIRST AND SECOND VOLTAGES IS OPPOSITE IN POLARITY TO SAID THIRD VOLTAGE IN THE LAST MENTIONED SERIES CIRCUIT, WHEREBY THE ALGEBRAIC SUM OF SAID FIRST AND SECOND VOLTAGE IS APPLIED TO SAID DECTOR IN SERIES VOLTAGE OPPOSITION TO SAID THIRD VOLTAGE, MEANS OPERABLE TO EFFECT THE SIMULTANEOUS ADJUSTMENT OF SAID ADJUSTABLE TERMINALS ON SAID FIRST, FIFTH, SIXTH, AND SEVENTH RESISTORS FOR ADJUSTING THE APPARATUS IS ACCORDANCE WITH THE PURITY OF SAID SOLUTION, AND MEANS OPERABLE TO ADJUST SAID SIXTH TERMINAL ON SAID FOURTH RESISTOR AND HENCE TO ADJUST THE MAGNITUDE OF SAID THIRD VOLTAGE AS REQUIRED TO MAKE THE LATTER EQUAL IN MAGNITUDE BUT OPPOSITE IN POLARITY WITH RESPECT TO SAID ALGEBRAIC SUM OF SAID FIRST AND SECOND VOLTAGES AND THEREBY REDUCE THE CURRENT FLOW THROUGH SAID DETECTOR SUBSTANTIALLY TO ZERO, THE ADJUSTED POSITION OF SAID SIXTH TERMINAL ON SAID FOURTH RESISTOR FOR SUBSTANTIALLY ZERO CURRENT FLOW THROUGH SAID DETECTOR BEING A MEASURE OF THE DEGREE OF SATURATION OF SAID SOLUTION.