Adjustable pressure adaptor and sensing device

Claim 1

AN ADJUSTABLE PRESSURE SENSING DEVICE COMPRISING IN COMBINATION, A CYLINDRICAL TUBULAR HOUSING A CYLINDRICAL PISTON RECEIVING PORTION, CYLINDRICAL SLEEVE ENGAGING THE CYLINDRICAL TUBULAR HOUSING, AN ANNULAR SHOULDER DEPENDING FROM THE CYLINDRICAL PISTON RECEIVING PORTION OF THE HOUSING PROPORTIONED TO ABUT THE END OF THE CYLINDRICAL SLEEVE, A PISTON CONSTRAINED FOR RECIPROCATING MOVEMENT WITHIN THE HOUSING, A PISTON CAP, A DIAPHRAGM MEMBER SECURED AT ITS CENTRAL PORTION OF THE PISTON HEAD BY THE PISTON CAP AND SECURED TO THE HOUSING AT ITS EDGES BY THE PINCHING ACTION BETWEEN THE SLEEVE AND ANNULAR SHOULDER, SHAFT MEANS EXTENDING LONGITUDINALLY FROM THE PISTON, A ROTATABLE ACTUATING ROD, HELICAL MEANS COUPLING THE SHAFT MEANS TO THE ACTUATING ROD WHEREBY THE PISTON RECIPROCATING LONGITUDINAL MOTION RESPONSIVE TO PRESSURE DIFFENTIALS ON OPPOSITE SIDES OF THE DIAPHRAGM IS TRANSLATED INTO ROTORY MOTION, AND LONGITUDINALLY ADJUSTABLE END CAPS ON EACH END OF THE DEVICE ACTING ONE OPPOSITE ENDS OF THE HELICAL MEANS WHEREBY THE ROTATABLE ACTUATING ROD AND ANY ASSOCIATED READ OUT MEANS MAY BE CALIBRATED FROM EITHER END OF THE DEVICE.