Coulometric systems

Claim 1

A COULOMETRIC SYSTEM FOR DETERMINING THE CONCENTRATION OF A CONSITUENT IN AN ELECTROLYTE COMPRISING A PAIR OF ELECTRODES, A VESSEL CONTAINING THE ELECTROLYTE AND SAID CONSTITUENT, SAID ELECTROLYTE FORMING A CONDUCTING PATH BETWEEN SAID ELECTRODES, A SUPPLY CIRCUIT INCLUDING A RESISTOR, A CURRENT REGULATOR AN DSAID ELECTRODES CONNECTED TO AN UNREGULATED SOURCE OF UNIDIRECTIONAL CURRENT, CURRENT FLOW BY WAY OF SAID REGULATOR AND SAID RESISTOR AND BETWEEN SAID ELECTRODES PRODUCTING IN SAID ELECTROLYTE CHEMICAL REACTIONS FOR VARYING THE QUANTITY OF SAID CONSTITUENT IN SAID ELECTROLYTE, AN AMPLIFIER HAVING AN INPUT CIRCUIT INCLUDING SAID RESISTOR, A STANDARD CELL IN SAID INPUT CIRCUIT CONNECTED TO OPPOSE IN SAID INPUT CIRCUIT THE POTENTIAL DIFFERENCE DEVELOPED ACROSS SAID RESISTOR DUE TO SAID CURRENT FLOW THERETHROUGH, A VIBRATOR INCLUDED IN SAID INPUT CIRCUIT FOR PRODUCING AT THE OUTPUT OF SAID AMPLIFIER AN ALTERNATING CURRENT OF AMPLITUDE PROPORTIONAL TO THE DIFFERENCE BETWEEN THE VOLTAGE OF SAID STANDARD CELL AND THE POTENTIAL DIFFERENCE DEVELOPED ACROSS SAID RESISTOR AND OF ONE PHASE WHEN SAID VOLTAGE IS GREATER AND OF THE OPPOSITE PHASE WHEN SAID VOLTAGE IS LESS THAN SAID POTENTIAL DIFFERENCE, AND MEANS, RESPONSIVE TO THE OUTPUT OF SAID AMPLIFIER FOR OPERATING SAID REGULATOR IN ACCORDANCE WITH THE PHASE AND AMPLITUDE OF SAID ALTERNATING CURRENT TO MAINTAIN SAID CURRENT FLOW BETWEEN SAID ELECTRIDES AT A MAGNITUDE WHICH MAINTAINS SAID POTENTIAL DIFFERENCE DEVELOPED ACROSS SAID RESISTOR EQUAL TO THE VOLTAGE OF SAID STANDARD CELL.