Helical bourdon tube pressure transducer

Claim 1

A HELICAL BOURDAN TUBE PRESSURE TRANSDUCER COMPRISING: FIRST MEANS, INCLUDING RIGID MEANS FORMING A SEALED FLUID-TIGHT ENCLOSURE FOR ENCLOSING OPERATING MEMBERS OF THE TRANSDUCER, SAID FIRST MEANS INCLUDING STATIONARY STRUCTURE PROVIDING AN ANCHOR FOR ANCHORING A FIXED END OF A HELICAL BOURDON TUBE AND FOR ADMITTING FLUID UNDER PRESSURE TO SUCH TUBE; SAID FIRST MEANS FURTHER INCLUDING MEANS PROVIDING AN ELONGATE STATIONARY SUPPORT PRESENTING A FIRST CYLINDRICAL SURFACE; SECOND MEANS, INCLUDING A HELICAL BOURDON TUBE DISPOSED IN SAID ENCLOSURE ENCIRCLING SAID SUPPORT AND HAVING A FIXED END SEALED TO SAID ANCHOR AND HAVING A SEALED SECOND END SUBJECT TO MOVEMENT RELATIVE TO THE FIXED END INCIDENT TO CHANGE OF PRESSURE EXHIBITED BY FLUID IN THE INTERIOR OF THE TUBE; THIRD MEANS, INCLUDING AN ELONGATE MOVABLE HOLLOW SEALED MEMBER HAVING AN EXTENSIVE SECOND CYLINDRICAL SURFACE VERY CLOSELY ADJACENT TO AND CONCENTRIC WITH SAID FIRST CYLINDRICAL SURFACE AND FORMING WITH SAID STATIONARY SUPPORT A BEARING FOR SAID MOVABLE MEMBER, AND SAID MEMBER BEING CONNECTED TO THE SECOND END OF SAID BOURDON TUBE TO RESTRICT THE MOVEMENTS OF THE LATTER; FOURTH MEANS, INCLUDING RELATIVELY MOVABLE MEANS CONNECTED IN PART TO SAID FIRST MEANS AND IN PART TO SAID SECOND MEANS, FUNCTIONING TO INDICATE CHANGES IN PRESSURE EXHIBITED BY THE FLUID IN SAID BOURDON TUBE: AND FIFTH MEANS, INCLUDING A DENSE LIQUID IN SAID ENCLOSURE AND SURROUNDING SAID THIRD MEANS AND IN CONTACT WITH THE MOVABLE PART OF SAID BOURDON TUBE, SAID LIQUID SERVING TO RENDER SUBSTANTIALLY WEIGHTLESS THEREIN SAID MOVABLE HOLLOW SEALED MEMBER AND SAID BOURDON TUBE AND SERVING TO LUBRICATE SAID BEARING WHEREBY SAID TRANSDUCER MAY BE SUBJECTED TO ACCLERATIONS IN EXCESS OF ONE HUNDRED TIMES THAT IN GRAVITY WITHOUT STRUCTURAL DAMAGE THERETO.