Apparatus for introducing controlled quantities of liquids and solutes into a fluid medium

Claim 1

IN AN APPARATUS FOR INTRODUCING MEASURED QUANTITIES OF A DISSOLVED NORMALLY SOLID TREATING MATERIAL INTO A FLUID STREAM, IN COMBINATION: AN OUTER RECEPTACLE FOR RECEPTION OF A SUPPLY OF SOLUBLE SOLID TREATING MATERIAL, SAID OUTER RECEPTACLE HAVING A DISCHARGE OPENING; AND INNER RECEPTACLE LOCATED ABOVE THE TREATING MATERIAL IN SAID OUTER RECEPTACLE, SAID INNER RECEPTACLE HAVING AN INLET FOR ADMISSION OF FLUID THERETO AND AN EXPANSIBLE SAID CONTRACTIBLE TUBULAR SIDE WALL HAVING A BOTTOM EDGE, A RIGID, SUBSTANTIALLY DISK-SHAPED BOTTOM WALL BEING SECURED TO SAID EXPANSIBLE AND CONTRACTIBLE TUBULAR SIDE WALL ALONG SAID BOTTOM EDGE THEREOF, SAID BOTTOM WALL RESTING DIRECTLY ON THE SOLID TREATING MATERIAL IN SAID OUTER RECEPTACLE AND HAVING OUTLET MEANS THERETHROUGH OPENING DIRECTLY INTO SAID SOLID TREATING MATERIAL, WHEREBY ALL THE FLUID FLOWING THEOUGH SAID OUTLET MEANS INTO SAID OUTER RECEPTACLE IS COMPELLED TO COME INTO CONTACT WITH THE SOLID TREATING MATERIAL TO CONTINUOUSLY DISSOLVE AND TO ENTRAIN THE DISSOLVED TREATING MATERIAL THROUGH SAID DISCHARGE OPENING, THE INNER RECEPTACLE EXPANDING AT THE RATE AT WHICH THE DISSOLVED TREATING MATERIAL IS ENTRAINED BY SAID FLUID TO MAINTAIN SAID BOTTOM WALL IN CONTACT WITH THE SOLID TREATING MATERIAL IN SAID OUTER RECEPTACLE.