Gage to check relationship or concentricity of related surfaces to the pitch diameter of a threaded surface

Claim 1

A DEVICE FOR ACCURATELY ESTABLISHING THE TRUE PITCH CENTERLINE OF A THREADED HOLE, COMPRISING A TUBULAR BODY HAVING A THREADED INNER END PORTION, CIRCUMFERENTIALLY SPACED APERTURES IN SAID THREADED INNER END PORTION, SAID BODY HAVING AN INTERNAL ANNULAR SHOULDER BETWEEN ITS ENDS FACING TOWARD THE OUTER END OF SAID BODY, SAID BODY HAVING A CYLINDRICAL INTERIOR SURFACE EXTENDING FROM SAID SHOULDER TO ITS OUTER END AND HAVING A SECOND CYLINDRICAL INTERIOR SURFACE OF SMALLER DIAMETER THAN SAID FIRST-MENTIONED CYLINDRICAL SURFACE EXTENDING FROM SAID SHOULDER TO ITS INNER END, AN ELONGATED MEMBER HAVING A MAIN PORTION SLIDABLY FITTED IN SAID SECOND CYLINDRICAL SURFACE OF SAID BODY AND HAVING AN ENLARGED OUTER END PORTION SLIDABLY FITTED IN SAID FIRST-MENTIONED CYLINDRICAL SURFACE, SAID MAIN PORTION OF SAID MEMBER HAVING THREADED SEGMENTS PROJECTING THROUGH SAID APERTURES, MEANS NORMALLY AXIALLY POSITIONING SAID MEMBER SO THAT THE THREADS OF SAID SEGMENTS ALIGN WITH THE THREADS OF THE INNER END PORTION OF SAID BODY INCLUDING RESILIENT MEANS INTERPOSED BETWEEN SAID ENLARGED OUTER END PORTION OF SAID MEMBER AND SAID SHOULDER OF SAID BODY URGING SAID MEMBER OUTWARDLY RELATIVE TO SAID BODY, STOPS ON SAID BODY AND SAID MEMBER LIMITING AXIALLY OUTWARD MOVEMENT OF SAID MEMBER RELATIVE TO SAID BODY, AND MEANS FOR AXIALLY MOVING SAID MEMBER AXIALLY INWARDLY RELATIVE TO SAID BODY AGAINST THE ACTION OF SAID RESILIENT MEANS TO CAUSE THE THREADS OF SAID SEGMENTS TO CLAMP THE THREADS OF A HOLE INTO WHICH SAID DEVICE IS THREADED.

Claim 2

A DEVICE FOR ACCURATELY ESTABLISHING THE TRUE PITCH CENTERLINE OF A THREADED HOLE, COMPRISING A TUBULAR BODY HAVING A THREADED INNER END PORTION, CIRCUMFERENTIALLY SPACED APERTURES IN SAID THREADED INNER END PORTION, SAID BODY HAVING AN INTERNAL ANNULAR SHOULDER BETWEEN ITS ENDS FACING TOWARD THE OUTER END OF SAID BODY, SAID BODY HAVING A CYLINDRICAL INTERIOR SURFACE EXTENDING FROM SAID SHOULDER TO ITS OUTER END AND HAVING A SECOND CYLINDRICAL INTERIOR SURFACE OF SMALLER DIAMETER THAN SAID FIRST-MENTIONED CYLINDRICAL SURFACE EXTENDING FROM SAID SHOULDER TO ITS INNER END, AN ELONGATED MEMBER HAVING A MAIN PORTION SLIDABLY FITTED IN SAID SECOND CYLINDRICAL SURFACE OF SAID BODY AND HAVING AN ENLARGED OUTER END PORTION SLIDABLY FITTED IN SAID FIRST-MENTIONED CYLINDRICAL SURFACE, SAID MAIN PORTION OF SAID MEMBER HAVING THREADED SEGMENTS PROJECTING THROUGH SAID APERTURES, MEANS NORMALLY AXIALLY POSITIONING SAID MEMBER SO THAT THE THREADS OF SAID SEGMENTS ALIGN WITH THE THREADS OF THE INNER END PORTION OF SAID BODY INCLUDING RESILIENT MEANS INTERPOSED BETWEEN SAID ENLARGED OUTER END PORTION OF SAID MEMBER AND SAID SHOULDER OF SAID BODY URGING SAID MEMBER OUTWARDLY RELATIVE TO SAID BODY, STOPS ON SAID BODY AND SAID MEMBER LIMITING AXIALLY OUTWARD MOVEMENT OF SAID MEMBER RELATIVE TO SAID BODY, AND MEANS FOR AXIALLY MOVING SAID MEMBER AXIALLY INWARDLY RELATIVE TO SAID BODY AGAINST THE ACTION OF SAID RESILIENT MEANS TO CAUSE THE THREADS OF SAID SEGMENTS TO CLAMP THE THREADS OF A HOLE INTO WHICH SAID DEVICE IS THREADED.