Means for monitoring and maintaining concentration of depletable work solutions

Claim 1

IN COMBINATION A DEVICE FOR WASHING ARTICLES BY SUBJECTING THEM TO A CUSTOM WORK SOLUTION CONTAINING TWO OR MORE NORMALLY INCOMPATIBLE LIQUID CHEMICAL INGREDIENTS, COMPRISING: A RECEPTACLE, MEANS FOR INTRODUCING SIMULTANEOUSLY TWO OR MORE NORMALLY INCOMPATIBLE LIQUID CHEMICAL INGREDIENTS INTO THE RECEPTACLE FOR PROVIDING A CUSTOM WORK SOLUTION CONTAINING MINIMAL AMOUNTS OF THE VARIOUS INGREDIENTS REQUIRED TO EFFECT THE DESIRED WASHING OF THE PARTICULAR ARTICLES SUBJECTED TO SAID WORK SOLUTION, SEPARATE STORAGE CONTAINERS FOR EACH OF SAID CHEMICAL INGREDIENTS LOCATED REMOTELY FROM SAID RECEPTACLE, SAID MEANS FOR INTRODUCING SAID INGREDIENTS INTO SAID RECEPTACLE INCLUDING ASSOCIATED PIPING, INGREDIENT MOVING MEANS AND ADJUSTABLE REGULATING MEANS OPERABLE FOR SIMULTANEOUSLY DELIVERING EACH OF SAID INGREDIENTS IN SEPARATED CONTROLLED AMOUNTS, AND IN PREDETERMINED RATIOS WITH EACH OTHER FROM THEIR RESPECTIVE STORAGE CONTAINERS AND DISCHARGING THEM SEPARATELY DIRECTLY INTO SAID CUSTOM WORK SOLUTION TO PRODUCE A PRESELECTED CONCENTRATION, AND MEANS INCLUDING A SENSOR IMMERSED IN AND RESPONSIVE TO THE CONCENTRATION OF SAID CUSTOM WORK SOLUTION FOR INITIATING THE OPERATION OF SAID INGREDIENT MOVING MEANS WHENEVER THE CHEMICAL CONTENT OF THE WORK SOLUTION IS LESS THAN THE PRESELECTED CONCENTRATION.