Direct reading system for metal ion determination

Claim 1

AN APPARATUS FOR DETERMINING THE PROPORTION OF LEAD IONS IN AN UNKNOWN SOLUTION BY MAINTAINING IN SAID SOLUTION A KNOWN PROPORTION OF ANTIMONY IONS AND IMPRESSING STEPWISE A PLURALITY OF DISTINGUISHABLE POTENTIALS WHICH COMPRISES IN COMBINATION A TEST CELL INCLUDING A DROPPING MERCURY ELECTRODE, A MERCURY POOL ELECTRODE, A FIRST CONDUCTOR CONNECTED TO SAID DROPPING MERCURY ELECTRODE AND A SECOND CONDUCTOR CONNECTED TO SAID MERCURY POOL ELECTRODE, A SOURCE OF POTENTIAL, A CIRCUIT INCLUDING SAID TEST CELL, A PLURALITY OF INDIVIDUALLY CONTROLLED DIVIDERS OF THE POTENTIAL FROM SAID SOURCE, A PLURALITY OF GANG SWITCHES, A PLURALITY OF VOLTAGE BALANCING MEANS IN SAID CIRCUIT SELECTIVELY CONTROLLED BY SAID GANS SWITCHES, A MEANS IN SAID CIRCUIT ADAPTED TO INDICATE ELECTRICAL BALANCE AND UNBALANCE OF SAID CIRCUIT, SAID VOLTAGE BALANCING MEANS INCLUDING POTENTIOMETER MEANS ASSOCIATED WITH EACH OF SAID POTENTIAL DIVIDERS FOR BALANCING THE CIRCUIT AND THEREBY MEASURING THE ELECTRICAL CURRENT PASSING THROUGH SAID TEST CELL, AND SWITCH MEANS FOR SELECTIVELY IMPRESSING POTENTIALS FROM SAID POTENTIAL DIVIDERS OF ABOUT 0.05 TO 0.1 VOLT, ABOUT 0.25 TO 0.4 VOLT, AND ABOUT 0.6 TO 0.8 VOLT ACROSS SAID ELECTRODES.

Claim 2

AN APPARATUS FOR DETERMINING THE PROPORTION OF LEAD IONS IN AN UNKNOWN SOLUTION BY MAINTAINING IN SAID SOLUTION A KNOWN PROPORTION OF ANTIMONY IONS AND IMPRESSING STEPWISE A PLURALITY OF DISTINGUISHABLE POTENTIALS WHICH COMPRISES IN COMBINATION A TEST CELL INCLUDING A DROPPING MERCURY ELECTRODE, A MERCURY POOL ELECTRODE, A FIRST CONDUCTOR CONNECTED TO SAID DROPPING MERCURY ELECTRODE AND A SECOND CONDUCTOR CONNECTED TO SAID MERCURY POOL ELECTRODE, A SOURCE OF POTENTIAL, A CIRCUIT INCLUDING SAID TEST CELL, A PLURALITY OF INDIVIDUALLY CONTROLLED DIVIDERS OF THE POTENTIAL FROM SAID SOURCE, A PLURALITY OF GANG SWITCHES, A PLURALITY OF VOLTAGE BALANCING MEANS IN SAID CIRCUIT SELECTIVELY CONTROLLED BY SAID GANS SWITCHES, A MEANS IN SAID CIRCUIT ADAPTED TO INDICATE ELECTRICAL BALANCE AND UNBALANCE OF SAID CIRCUIT, SAID VOLTAGE BALANCING MEANS INCLUDING POTENTIOMETER MEANS ASSOCIATED WITH EACH OF SAID POTENTIAL DIVIDERS FOR BALANCING THE CIRCUIT AND THEREBY MEASURING THE ELECTRICAL CURRENT PASSING THROUGH SAID TEST CELL, AND SWITCH MEANS FOR SELECTIVELY IMPRESSING POTENTIALS FROM SAID POTENTIAL DIVIDERS OF ABOUT 0.05 TO 0.1 VOLT, ABOUT 0.25 TO 0.4 VOLT, AND ABOUT 0.6 TO 0.8 VOLT ACROSS SAID ELECTRODES.