Pneumatic gages

Claim 1

A GAGE FOR MEASURING SURFACE DIMENSIONS OF AN ELONGATED MEMBER COMPRISING: A MANDREL HAVING AN OPENING EXTENDING AXIALLY THERETHROUGH FOR GUIDING AND ALLOWING AXIAL PASSAGE THERETHROUGH OF THE MEMBER TO BE MEASURED; A MANIFOLD CHAMBER IN SAID MANDREL; A PLURALITY OF FLUID PASSAGES EXTENDING FROM SAID CHAMBER AND TERMINATING AT THE OUTER SURFACE OF SAID MANDREL MEANS ADAPTED TO CONNECT SAID MANIFOLD CHAMBER TO A SOUCRE OF FLUID AT A REGULATED PRESSURE; A LIKE PLURALITY OF GAGING MEMBERS PIVOTALLY MOUNTED AT THE OUTER SURFACE OF SAID MANDREL, EACH OF SAID GAGING MEMBERS HAVING A FIRST PORTION EXTENING AXIALLY ALONG THE OUTER SURFACE OF SAID MANDREL AND COOPERATING WITH ONE OF SAID FLUID PASSAGES TO CONTROL THE ESCAPE OF FLUID THEREFROM, EACH OF SAID GAGING MEMBERS FURTHER HAVING A FINGER PORTION EXTENDING INWARD FROM THE OUTER SURFACE OF SAID MANDREL AND ADJACENT ONE END OF, THE INNERMOST ENDS OF SAID FINGER PORTIONS BEING ADAPTED TO CONTACT THE SURFACE OF THE MEMBER TO BE MEASURED AND TO POSITION SAID PIVOTED GAGING MEMBERS ACCORDING TO THE DIMENSIONS OF THE MEMBER TO BE MEASURED, SAID ENDS OF SAID FINGER PORTIONS DEFINING AN OPENING HAVING A SHAPE CORRESPONDING TO THE CROSS-SECTIONAL SHAPE OF THE MEMBER TO BE MEASURED AND AXIALLY ALIGNED WITH THE AXIAL OPENING IN SAID MANDREL; BIASING MEANS ACTING ON SAID GAGING MEMBERS AND EFFECTIVE TO URGE SAID FIRST PORTIONS THEREOF TOWARD SAID FLUID PASSAGES AND SAID FINGER PORTIONS INTO CONTACT WITH THE SURFACE OF THE MEMBER BEING MEASURED; AND MEANS ADAPTED TO CONNECT SAID CHAMBER TO APPARATUS FOR SENSING A CHANGE IN PRESSURE THEREIN RESULTING FROM A CHANGE IN THE AMOUNT OF FLUID ESCAPING FROM ONE OR MORE OF SAID FLUID PASSAGES AND THEREBY TO INDICATE A DIMENSIONAL VARIATION IN THE MEMBER TO BE MEASURED.