Dispenser having end point indicating

Claim 1

IN A DISPENSING CONTAINER FOR AIR TREATING GEL WHICH UNDERGOES CHARACTERISTIC SHRINKAGE DUE TO EVAPORATION OF VOLATILIZABLE MATERIALS THEREFROM, A BASE PART FOR SAID CONTAINER HAVING AN ESSENTIALLY FLAT BOTTOM WALL WITH PERIPHERAL DOWNWARDLY PROTRUDING MEANS DEFINING A SHALLOW RECESS AND HAVING END POINT INDICATING MEANS ASSOCIATED THEREWITH FOR VISIBLY AND AUDIBLY SIGNALING WHEN THE USEFUL LIFE OF THE GEL HAS BEEN EXCEEDED, SAID END POINT INDICATING MEANS COMPRISING A SPRING MEMBER HAVING AN ANGULARLY OFFSET END FIXEDLY DISPOSED AGAINST SAID FLAT BOTTOM WALL, SAID SPRING MEMBER BEING PRETENSIONED ADJACENT THE OFFSET END THEREOF TO NORMALLY DISPOSE THE OTHER FREE END THEREOF IN A POSITION PROTRUDING DOWNWARDLY FROM SAID RECESS, BUT TO BE DEFLECTED TO AN ORIENTATION WITHIN SAID RECESS BY THE COMBINED WEIGHT OF SAID CONTAINER AND A USEFUL QUANTITY OF AIR TREATING GEL, AND THE PRETENSIONING OF SAID SPRING MEMBER BEING FURTHER CHARACTERIZED AS PROVIDING SUDDEN SNAP MOVEMENT THEREOF TO THE OUTWARDLY PROTRUDING POSITION, INCLINING SAID CONTAINER WITH RESPECT TO A HORIZONTAL SUPPORTING SURFACE, WHEN THE COMBINED WEIGHT OF THE CONTAINER AND RESIDUAL AIR TREATING GEL FALLS TO THE PREDETERMINED AMOUNT AT WHICH THE AIR TREATING GEL HAS BEEN SPENT.