Relief valve having convertible reset means

Claim 1

A PRESSURE RELIEF VALVE COMPRISING, A VALVE BODY HAVING A PAIR OF PORTS THEREIN, A VALVE SEAT POSITIONED WITHIN SAID VALVE BODY INTERMEDIATE SAID PORTS, A VALVE CLOSURE MEMBER INCLUDING SHAFT MEANS EXTENDING THROUGH SAID VALVE BODY WITH SAID VALVE CLOSURE MEMBER COOPERATING WITH SAID VALVE SEAT TO CONTROL FLOW OF FLUID THROUGH SAID VALVE BODY BETWEEN SAID PORTS, FLANGE MEANS MOUNTED ON SAID VALVE BODY AND EXTENDING TRANSVERSELY THEREFROM, A PIVOTED LEVER MEMBER PIVOTALLY MOUNTED ON SAID FLANGE MEANS AND MOVABLE RELATIVE THERETO, A CIRCULAR MAGNETICALLY PERMEABLE ELEMENT THREADED IN AN APERTURE IN SAID PIVOTED LEVER MEMBER REMOTE FROM THE PIVOT OF SAID LEVER MEMBER, A MAGNET MEANS MOUNTED ON SAID FLANGE MEANS AND POSITIONED ADJACENT TO AND IN COOPERATING RELATIONSHIP WITH SAID MAGNETIC PERMEABLE ELEMENT ON SAID PIVOTED LEVER, AN INTERMEDIATE LEVER PIVOTALLY MOUNTED ON SAID FLANGE MEANS AND ENGAGEABLE WITH THE SHAFT MEANS OF SAID VALVE CLOSURE MEMBER, AND A COUPLING LINKAGE MOUNTED IN SAID PIVOTED LEVER MEMBER AND ENGAGING SAID INTERMEDIATE LEVER AT A POINT REMOTE FROM THE PIVOT OF THE INTERMEDIATE LEVER AND ENGAGEMENT OF SAID SHAFT WITH SAID INTERMEDIATE LEVER, SAID COUPLING LINKAGE BEING OPERATIVE TO TRANSMIT MOVEMENT OF SAID SHAFT MEANS THROUGH SAID INTERMEDIATE LEVER TO THE PIVOTED LEVER MEMBER TO MOVE SAID MAGNETIC PERMEABLE ELEMENT RELATIVE TO SAID MAGNET MEANS, ONE OF THE PORT MEANS OF SAID BODY BEING ADAPTED TO BE CONNECTED TO A PRIMARY CONDUIT HAVING FLUID UNDER PRESSURE THEREIN WITH THE FLUID APPLYING A PRESSURE DIFFERENTIAL ACROSS SAID VALVE CLOSURE MEMBER TO EXERT A FORCE ON SAID SHAFT MEANS AND UPON SAID INTERMEDIATE LEVER WITH THE INTERMEDIATE LEVER APPLYING SAID FORCE THROUGH SAID COUPLING MEANS TO SAID PIVOTED LEVER MEMBER WHICH FORCE IS COUNTERACTED BY THE FORCE OF THE MAGNETIC ASSOCIATION BETWEEN THE MAGNETIC PERMEABLE ELEMENT AND THE MAGNET MEANS ON SAID FLANGE MEANS TO HOLD SAID VALVE CLOSURE MEMBER ON SAID VALVE SEAT FOR NORMAL PRESSURE CONDITIONS IN THE PRIMARY CONDUIT, SAID VALVE CLOSURE MEMBER WHEN EXPOSED TO A PRESSURE IN THE PRIMARY CONDUIT IN EXCESS OF SAID NORMAL PRESSURE BEING MOVED TO AN OPEN POSITION AS A RESULT OF THE FORCE ON SAID SHAFT MEANS OVERCOMING THE FORCE OF MAGNETIC ASSOCIATION BETWEEN SAID MAGNET MEANS AND SAID MAGNETIC PERMEABLE MEMBER ON SAID PIVOTED LEVER MEMBER.