Flow-controlling apparatus

Claim 1

A FLOW CONTROL APPARATUS FOR FLUID MEDIUMS FLOWING THROUGH A CONDUIT, COMPRISING A SHAFT, MEANS FOR ROTATABLY MOUNTING SAID SHAFT IN THE WALL OF SAID CONDUIT SO AS TO HAVE ONE END PORTION EXTENDING TRANSVERSELY WITHIN SAID CONDUIT AND ANOTHER END PORTION EXTENDING FREELY THROUGH TO THE OUTSIDE OF SAID CONDUIT, A MEASURING VANE ATTACHED TO THE END PORTION OF SAID SHAFT INSIDE SAID CONDUIT, SAID VANE BEING UNSYMMETRICALLY DISPOSED WITH RESPECT TO SAID SHAFT PORTION FOR OCCUPYING DIFFERENT ANGULAR POSITIONS WITHIN SAID CONDUIT UNDER THE ACTION OF THE FLUID MEDIUM ACCORDING TO THE VELOCITY OF THE SAME, AT LEAST ONE RADIALLY EXTENDING CAM MEMBER ADJUSTABLY MOUNTED ON THE FREE END PORTION OF SAID SHAFT OUTSIDE SAID CONDUIT SO AS TO ALLOW A PREDETERMINED ANGULAR SETTING OF SAID CAM MEMBER RELATIVELY TO SAID SHAFT, A WORM GEAR SECURED TO SAID SHAFT AND AN ASSOCIATED WORM CONNECTED TO SAID CAM MEMBER, SAID WORM AND WORM GEAR BEING ADAPTED TO SET AND LOCK SAID CAM MEMBER IN A PREDETERMINED ANGULAR POSITION ON SAID SHAFT, SAID VANE AND SAID CAM MEMBER CONSTITUTING A SYSTEM WHICH IS SUBSTANTIALLY BALANCED WEIGHTWISE IN RELATION TO THE AXIS OF SAID ROTATABLE SHAFT, AT LEAST ONE ELECTRIC SWITCH HAVING AN OPERATIVE MEMBER IN ENGAGEMENT WITH AND OPERABLE BY SAID CAM MEMBER, AND ELECTRICAL CIRCUIT MEANS CONTROLLED BY SAID SWITCH FOR RELEASING AN ELECTRICAL SUPERVISING SIGNAL WHEN SAID CAM REACHES A PREDETERMINED POSITION AND OPERATES SAID SWITCH.