Combination alarm and control valve for sprinkler systems

Claim 1

A COMBINATION ALARM AND CONTROL VALVE FOR ACTUATING SWITCH MEANS FOR ACTUATING AN ALARM AND FOR CAUSING BURNER SHUTDOWN OF A HEATING UNIT UPON THE FLOW OF FLUID THROUGH A FLUID CONDUIT, SAID ALARM AND CONTROL VALVE INCLUDING A BODY HAVING FLUID INTAKE AND OUTLET PASSAGES FORMED THEREIN ADAPTED TO HAVE THE OUTLET AND INLET ENDS RESPECTIVELY OF A PAIR OF SECTIONS OF FLUID CONDUIT COMMUNICATED THEREWITH, MOVABLE PRESSURE RESPONSIVE ALARM ACTUATING MEANS CARRIED BY SAID BODY AND OPERABLE TO ACTUATE AN ALARM UPON BEING COMMUNICATED WITH A SOURCE OF FLUID UNDER PRESSURE, PASSAGE MEANS COMMUNICATING SAID ALARM ACTUATING MEANS WITH THE INTERIOR OF SAID BODY, MOVABLE VALVE MEANS OPERATIVELY ASSOCIATED WITH SAID PASSAGE MEANS AND NORMALLY RESILIENTLY URGED TO A POSITION CLOSING SAID PASSAGE MEANS AND SEALING SAID ALARM ACTUATING MEANS FROM THE INTERIOR OF SAID BODY, AND MOVABLE FLOW RESPONSIVE FORCE MEANS DISPOSED IN SAID BODY, ENGAGEABLE WITH SAID VALVE MEANS AND RESPONSIVE TO THE FLOW OF FLUID THROUGH SAID BODY FOR MOVING SAID VALVE MEANS TO A POSITION OPENING SAID PASSAGE MEANS, SAID VALVE MEANS COMPRISING A BELLCRANK PIVOTALLY MOUNTED IN SAID BODY AND HAVING ONE ARM WHOSE FREE END IS REGISTRABLE WITH THE INLET END OF SAID PASSAGE MEANS, SAID FLOW RESPONSIVE FORCE MEANS COMPRISING A PISTON SLIDABLY DISPOSED IN SAID FLUID INLET PASSAGE, SAID BELL CRANK INCLUDING A SECOND ARM WHOSE FREE END PORTION IS ENGAGED WITH THE INNER END OF SAID FORCE MEANS PISTON, MEANS NORMALLY RESILIENTLY URGING SAID BELL CRANK TO A POSITION WITH SAID FIRST AND SECOND ARMS CLOSING SAID PASSAGE MEANS AND URGING SAID FORCE PISTON TO AN OUTERMOST POSITION IN SAID INLET PASSAGE.