Helical bourdon tube pressure potentiometer

Claim 1

A HELICAL BOURDON TUBE PRESSURE POTENTIOMETER COMPRISING: FIRST MEANS, INCLUDING HOUSING MEANS PROVIDING AN ENCLOSED CHAMBER AND STATIONARY MEANS PROVIDING AN ELONGATE RIGID MEMBER PRESENTING AN ELONGATE STATIONARY CYLINDRICAL SURFACE DISPOSED AROUND AN AXIS; SECOND MEANS, INCLUDING AN AXIALLY ROTATABLE MEMBER PRESENTING A SECOND ELONGATE CYLINDRICAL SURFACE CONCENTRIC WITH SAID STATIONARY CYLINDRICAL SURFACE AND SPACED THEREFROM A SMALL DETERMINED EXTENT WHEREBY TO PROVIDE A ROTARY BEARING RELATIONSHIP BETWEEN SAID MOVABLE MEMBER AND SAID STATIONARY MEANS; THIRD MEANS, INCLUDING A HELICAL BOURDON TUBE HAVING A FREE END AND A FIXED END AND DISPOSED SUBSTANTIALLY COAXIALLY WITH EITHER OF SAID CYLINDRICAL SURFACES, SAID THIRD MEANS INCLUDING MEANS ANCHORING THE FIXED END OF SAID BOURDON TUBE TO SAID HOUSING MEANS AND HAVING PROVISION FOR ADMISSION OF FLUID UNDER PRESSURE INTO THE INTERIOR OF THE BOURDON TUBE, SAID THIRD MEANS INCLUDING MEANS SEALING THE FREE END OF THE BOURDON TUBE AND SECURING THE SAME TO SAID ROTATABLE MEMBER FOR ROTATIONAL MOVEMENT THEREWITH ABOUT SAID AXIS;