Method of making a diaphragm valve

Claim 1

A METHOD OF MAKING THE BODY OF A DIAPHRAGM VALVE HAVING A PASSAGE RISING FROM AN INLET FITTING TO A SHALLOW CONCAVE FACED WEIR AND A PASSAGE FALLING FROM THE WEIR TO AN OUTLET FITTING, WHICH COMPRISES PROVIDING TWO IDENTICAL LENGTHS OF TUBING ONE FOR EACH PASSAGE AND EACH OF WHICH TO BEGIN WITH IS OF ELLIPTICAL CROSS SECTION AT LEAST AT THE END WHICH IS TO CONNECT WITH THE END FITTING SUCH THAT BY PARTING OFF THIS END ON A PLANE THE NORMAL TO WHICH MAKES A FAIRLY SMALL ANGLE TO THE AXIS, THE APERTURE IS CIRCULAR AND MATCHES THE PIPE SIZE FOR WHICH THE VALVE IS INTENDED, PARTING OFF EACH LENGTH OF TUBING IN SAID PLANE IN THE PART OF ELLIPTICAL CROSS SECTION AND FUSION JOINING THIS END TO A RESPECTIVE END FITTING, SQUEEZING EACH LENGTH OF TUBING SO THAT ITS OTHER END TAKES AN ELONGATED OVAL FORM WITH ITS MAJOR AXIS PERPENDICULAR TO THAT PLANE PERPENDICULAR TO THE TUBE END FITTING IN WHICH THE AXIS OF THE LENGTH OF THE TUBING LIES, FACING OFF THIS END OF EACH LENGTH OF TUBING NORMAL TO THE AXIS OF THE END FITTING TO ENABLE IT TO FIT AGAINST A PLATE FORMING THE WEIR, EFFECTING A BORING OPERATION FROM THE SIDE TOWARDS WHICH THE LENGTH OF TUBING SLOPES TO PROVIDE THE TUBE WITH A RECESS TO RECEIVE SUBSTANTIALLY ONE HALF OF A WEIR FLANGE, FUSION JOINING THE WEIR PLATE TO THE WEIR FLANGE, FUSION JOINING THE FACED OFF ENDS OF THE TWO LENGTHS OF TUBING RESPECTIVELY TO OPPOSITE SIDES OF THE WEIR PLATE, AND FUSION JOINING THE WEIR FLANGE TO THE TWO LENGTHS OF TUBING AT THE LINE OF THE BORED RECESS.

Claim 2

A METHOD OF MAKING THE BODY OF A DIAPHRAGM VALVE HAVING A PASSAGE RISING FROM AN INLET FITTING TO A SHALLOW CONCAVE FACED WEIR AND A PASSAGE FALLING FROM THE WEIR TO AN OUTLET FITTING, WHICH COMPRISES PROVIDING TWO IDENTICAL LENGTHS OF TUBING ONE FOR EACH PASSAGE AND EACH OF WHICH TO BEGIN WITH IS OF ELLIPTICAL CROSS SECTION AT LEAST AT THE END WHICH IS TO CONNECT WITH THE END FITTING SUCH THAT BY PARTING OFF THIS END ON A PLANE THE NORMAL TO WHICH MAKES A FAIRLY SMALL ANGLE TO THE AXIS, THE APERTURE IS CIRCULAR AND MATCHES THE PIPE SIZE FOR WHICH THE VALVE IS INTENDED, PARTING OFF EACH LENGTH OF TUBING IN SAID PLANE IN THE PART OF ELLIPTICAL CROSS SECTION AND FUSION JOINING THIS END TO A RESPECTIVE END FITTING, SQUEEZING EACH LENGTH OF TUBING SO THAT ITS OTHER END TAKES AN ELONGATED OVAL FORM WITH ITS MAJOR AXIS PERPENDICULAR TO THAT PLANE PERPENDICULAR TO THE TUBE END FITTING IN WHICH THE AXIS OF THE LENGTH OF THE TUBING LIES, FACING OFF THIS END OF EACH LENGTH OF TUBING NORMAL TO THE AXIS OF THE END FITTING TO ENABLE IT TO FIT AGAINST A PLATE FORMING THE WEIR, EFFECTING A BORING OPERATION FROM THE SIDE TOWARDS WHICH THE LENGTH OF TUBING SLOPES TO PROVIDE THE TUBE WITH A RECESS TO RECEIVE SUBSTANTIALLY ONE HALF OF A WEIR FLANGE, FUSION JOINING THE WEIR PLATE TO THE WEIR FLANGE, FUSION JOINING THE FACED OFF ENDS OF THE TWO LENGTHS OF TUBING RESPECTIVELY TO OPPOSITE SIDES OF THE WEIR PLATE, AND FUSION JOINING THE WEIR FLANGE TO THE TWO LENGTHS OF TUBING AT THE LINE OF THE BORED RECESS.