Diaphragm operated valves

Claim 1

APPARATUS FOR ADJUSTABLY LOADING THE BIASING SPRING OF A FLUID PRESSURE REGULATOR COMPRISING: A HOUSING MEMBER FOR THE BIASING SPRING, SAID HOUSING MEMBER HAVING A THREADED APERTURE FORMED THEREIN; A FIRST EXTERNALLY THREADED ADJUSTMENT MEMBER THREADED INTO SAID APERTURE AND MOVABLE THROUGH A SUBSTANTIAL AXIAL DISTANCE WITH RESPECT THERETO TO FACILITATE AN INITIAL COARSE ADJUSTMENT OF THE LOADING ON THE SPRING, SAID FIRST ADJUSTMENT MEMBER HAVING AN APERTURE EXTENDING THERETHROUGH; MEANS OPERABLE TO DEFORM A PORTION OF THE THREADS INTERMEDIATE SAID HOUSING MEMBER AND SAID FIRST ADJUSTMENT MEMBER TO PERMANENTLY LOCK SAID FIRST ADJUSTMENT MEMBER WITH RESPECT TO SAID HOUSING AFTER AN INITIAL ADJUSTMENT IS MADE; A SECOND ADJUSTMENT MEMBER EXTENDING THROUGH THE APERTURE IN SAID FIRST ADJUSTMENT MEMBER AND BEING AXIALLY MOVABLE WITH RESPECT THERETO; ABUTMENT MEANS ON SAID SECOND ADJUSTMENT MEMBER, ON EACH SIDE OF SAID FIRST ADJUSTMENT MEMBER, FOR LIMITING RELATIVE AXIAL MOVEMENT WITH RESPECT THERETO TO FACILITATE LIMITED ADJUSTMENT OF THE LOADING ON THE SPRING AFTER SAID FIRST ADJUSTMENT MEMBER IS LOCKED; AND MEANS CARRIED BY SAID SECOND ADJUSTMENT MEMBER AND ENGAGING ONE END OF THE SPRING TO COMPRESS THE SPRING ACCORDING TO THE POSITIONS OF SAID FIRST AND SECOND ADJUSTMENT MEMBERS WITH RESPECT TO SAID HOUSING.