Continuous recording titrator

Claim 1

APPARATUS FOR CONTINOUSLY TITRATING A SAMPLE STREAM WITH A REAGENT TO MONITOR A CHARACTERISTIC OF THE STREAM, COMPRISING IN COMBINATION; A TITRATION CHAMBER; FIRST CYCLICAL PUMP MEANS FOR INTRODUCING PULSES OF SAMPLE OF ONE PHASE AND ONE PERIOD INTO SAID TITRATION CHAMBER; SECOND CYCLIC PUMP MEANS FOR INTRODUCING PULSES OF REAGENT OF A PHASE DIFFERENT FROM SAID ONE PHASE AND A PERIOD THE SAME AS SAID ONE PERIOD INTO SAID TRITRATION CHAMBER HAVING A VARIABLE OUTPUT; FLOW MEANS FOR DISCHARGING FLUID FROM SAID CHAMBER; SENSING MEANS FOR PRODUCING A SECOND OUTPUT INDICATIVE OF THE CHARACTERISTIC OF THE SOLUTION FORMED BY THE MIXING AND CHEMICAL REACTING OF THE SAMPLE AND THE REAGENT; MEANS FOR COMPARING SAID SECOND OUTPUT WITH A PRESELECTED REFERENCE AND PRODUCING AN ERROR SIGNAL CORRESPONDING TO THE DIFFERENCE BETWEEN SAID OUTPUT AND SAID REFERENCE; AND MEANS COUPLED TO SAID COMPARING MEANS AND RESPONSIVE TO SAID ERROR SIGNAL, SAID MEANS BEING OPERATIVE TO VARY THE OUTPUT OF SAID SECOND CYCLIC PUMP MEANS AND THEREBY REDUCE THE NET DIFFERENCE BETWEEN SAID OUTPUT AND SAID REFERENCE TO ZERO.