Flow signal for compressed gas tanks

Claim 1

AN AUDIBLE WARNING DEVICE FOR UNDERWATER BREATHING APPARATUS OF THE TYPE INCLUDING A PRESSURIZED GAS CONTAINER HAVING A GAS OUTLET FITTING, SAID DEVICE COMPRISING, A FIRST GAS OUTLET CONDUIT EXTENDING FROM SAID GAS OUTLET FITTING TO WITHIN SAID GAS CONTAINER, A SECOND GAS OUTLET CONDUIT EXTENDING FROM SAID GAS OUTLET FITTING TO WITHIN SAID GAS CONTAINER, A GAS FLOW OPERATED IMPACT CREATING ASSEMBLY MOUNTED ON THE FREE END OF SAID SECOND GAS OUTLET CONDUIT IN A POSITION DIRECTLY ADJACENT TO AN INNER WALL OF SAID CONTAINER, SAID GAS FLOW OPERATED IMPACT CREATING ASSEMBLY INCLUDING A MAIN BODY HAVING AN AXIAL RECESS THERETHROUGH WITH AN INTERNAL ENLARGEMENT OF SAID AXIAL RECESS HOUSING A RESILIENT DIAPHRAGM HAVING A CENTRAL OPENING, A FIRST VALVE MEANS INCLUDING A VALVE HEAD AND A VALVE STEM GUIDED FOR RECIPROCAL SLIDING MOVEMENT MOUNTED WITHIN THE MAIN BODY IN AXIAL ALIGNMENT WITH SAID DIAPHRAGM OPENING SO THAT FLEXURE OF SAID DIAPHRAGM UNDER GAS FLOW PRESSURE ALTERNATELY SEATS AND UNSEATS SAID FIRST VALVE HEAD ON AND FROM SAID DIAPHRAGM OPENING AND IMPARTS RECIPROCAL MOVEMENT TO SAID VALVE STEM, THE OTHER END OF SAID VALVE STEM BEING OPERATIVELY CONNECTED TO AN IMPACT MEMBER LOCATED AT THE END OF SAID IMPACT CREATING ASSEMBLY PLACED IN JUXTAPOSED RELATIONSHIP TO SAID CONTAINER INNER WALL, AND A PRESSURE CONTROLLED SPRING LOADED SECOND VALVE CONNECTED TO SAID FIRST GAS OUTLET CONDUIT WHEREBY UNDER PREDETERMINED HIGH PRESSURE CONDITIONS SAID FIRST GAS OUTLET CONDUIT IS OPEN FOR GAS FLOW TO SAID OUTLET FITTING, AND UNDER PREDETERMINED LOWER GAS PRESSURE CONDITIONS SAID SECOND VALVE OPERATES TO CLOSE SAID FIRST OUTLET CONDUIT CAUSING THE FULL GAS FLOW TO PASS THROUGH SAID SECOND OUTLET CONDUIT OPERATING SAID IMPACT MEMBER.