Thread dial gauge

Claim 1

A DEVICE FOR CHECKING THE PITCH DIAMETER OF INTERNAL AND EXTERNAL THREADS THAT HAVE DIAMETRICALLY OPPOSITELY POSITIONED CRESTS AND TROUGHS HAVING SIDES SLOPED AT A GIVEN ANGLE, COMPRISING IN COMBINATION: A SLIDER COMPRISING A PAIR OF SPACED APART PARALLEL GUIDE BARS OF TRAPEZOIDAL CROSS SECTION; A BRACKET MOUNTED BETWEEN SAID BARS AT ONE END OF IT TO SPACE SAID BARS APART; A FIRST INVERTABLY POSITIONABLE ARM MOUNTED ON SAID BRACKET; A FIRST THREAD-MESHING ELEMENT MOUNTED AT THE END OF SAID FIRST ARM, SAID ELEMENT COMPRISING A CONE HAVING ITS SIDES AT SAID GIVEN ANGLE, AND HAVING ITS TOP FLATTENED OFF, WHEREBY SAID CONICAL THREAD MESHING ELEMENT WILL FIT SNUGLY INTO A TROUGH OF SAID THREAD WITHOUT BOTTOMING THEREIN; A PISTOL-GRIP ARRANGEMENT HAVING A FRAME HAVING GROOVES THAT SPACE AND GUIDE SAID GUIDE BARS; A CLAMP PLATE HAVING GROOVES THAT SPACE AND GUIDE SAID GUIDE BARS; A SINGLE LOCKING SCREW MEANS FOR LOCKING TOGETHER SAID CLAMP PLATE, SAID GUIDE BARS, AND SAID FRAME; A FINGER TRIGGER PIVOTALLY MOUNTED ON SAID FRAME AND ENCLOSED BY SAID PISTOL-GRIP ARRANGEMENT, SAID TRIGGER HAVING CONVOLUTIONS FOR FITTING AT LEAST ONE FINGER OF THE HAND, SAID TRIGGER TERMINATING IN A LEVER AT THE OTHER END THEREOF, AND CARRYING AN ACTUATING BAR ADJACENT SAID TRIGGER END; A SECOND INVERTABLY POSITIONABLE ARM MOUNTED ON SAID LEVER; A SECOND THREAD-MESHING ELEMENT MOUNTED AT THE END OF SAID SECOND ARM, SAID SECOND ELEMENT COMPRISING A SLOPING SIDE STRUCTURE WHOSE INNER SURFACES ARE AT SAID GIVEN ANGLE TO MESH WITH THE CREST OF SAID THREAD, AND WHOSE OUTER SURFACES ARE AT AN ANLGE NOT TO UNDULY MESH WITH SAID THREAD, THE UPPER PORTION OF SAID STRUCTURE BEING FLATTENED TO PREVENT BOTTOMING IN SAID THREAD, SAID SECOND THREAD-MESHING ELEMENT BEING ARCUATE TO BETTER MESH WITH THE CREST OF SAID THREAD, WHEREBY SAID THREAD-MESHING ELEMENTS MAY BE POSITIONED TO MESH WITH INTERNAL AND EXTERNAL THREADS, AND SAID SECOND ELEMENT MAY HAVE A LIMITED MOVEMENT CONTROLLED BY THE MOVEMENT OF SAID TRIGGER; A DIAL INDICATOR HAVING AN ACTUATING PIN; AND MEANS FOR MOUNTING SAID INDICATOR ON SAID FRAME WITH SAID ACTUATING PIN IN CONTACT WITH SAID ACTUATING BAR OF SAID TRIGGER.

Claim 2

A DEVICE FOR CHECKING THE PITCH DIAMETER OF INTERNAL AND EXTERNAL THREADS THAT HAVE DIAMETRICALLY OPPOSITELY POSITIONED CRESTS AND TROUGHS HAVING SIDES SLOPED AT A GIVEN ANGLE, COMPRISING IN COMBINATION: A SLIDER COMPRISING A PAIR OF SPACED APART PARALLEL GUIDE BARS OF TRAPEZOIDAL CROSS SECTION; A BRACKET MOUNTED BETWEEN SAID BARS AT ONE END OF IT TO SPACE SAID BARS APART; A FIRST INVERTABLY POSITIONABLE ARM MOUNTED ON SAID BRACKET; A FIRST THREAD-MESHING ELEMENT MOUNTED AT THE END OF SAID FIRST ARM, SAID ELEMENT COMPRISING A CONE HAVING ITS SIDES AT SAID GIVEN ANGLE, AND HAVING ITS TOP FLATTENED OFF, WHEREBY SAID CONICAL THREAD MESHING ELEMENT WILL FIT SNUGLY INTO A TROUGH OF SAID THREAD WITHOUT BOTTOMING THEREIN; A PISTOL-GRIP ARRANGEMENT HAVING A FRAME HAVING GROOVES THAT SPACE AND GUIDE SAID GUIDE BARS; A CLAMP PLATE HAVING GROOVES THAT SPACE AND GUIDE SAID GUIDE BARS; A SINGLE LOCKING SCREW MEANS FOR LOCKING TOGETHER SAID CLAMP PLATE, SAID GUIDE BARS, AND SAID FRAME; A FINGER TRIGGER PIVOTALLY MOUNTED ON SAID FRAME AND ENCLOSED BY SAID PISTOL-GRIP ARRANGEMENT, SAID TRIGGER HAVING CONVOLUTIONS FOR FITTING AT LEAST ONE FINGER OF THE HAND, SAID TRIGGER TERMINATING IN A LEVER AT THE OTHER END THEREOF, AND CARRYING AN ACTUATING BAR ADJACENT SAID TRIGGER END; A SECOND INVERTABLY POSITIONABLE ARM MOUNTED ON SAID LEVER; A SECOND THREAD-MESHING ELEMENT MOUNTED AT THE END OF SAID SECOND ARM, SAID SECOND ELEMENT COMPRISING A SLOPING SIDE STRUCTURE WHOSE INNER SURFACES ARE AT SAID GIVEN ANGLE TO MESH WITH THE CREST OF SAID THREAD, AND WHOSE OUTER SURFACES ARE AT AN ANLGE NOT TO UNDULY MESH WITH SAID THREAD, THE UPPER PORTION OF SAID STRUCTURE BEING FLATTENED TO PREVENT BOTTOMING IN SAID THREAD, SAID SECOND THREAD-MESHING ELEMENT BEING ARCUATE TO BETTER MESH WITH THE CREST OF SAID THREAD, WHEREBY SAID THREAD-MESHING ELEMENTS MAY BE POSITIONED TO MESH WITH INTERNAL AND EXTERNAL THREADS, AND SAID SECOND ELEMENT MAY HAVE A LIMITED MOVEMENT CONTROLLED BY THE MOVEMENT OF SAID TRIGGER; A DIAL INDICATOR HAVING AN ACTUATING PIN; AND MEANS FOR MOUNTING SAID INDICATOR ON SAID FRAME WITH SAID ACTUATING PIN IN CONTACT WITH SAID ACTUATING BAR OF SAID TRIGGER.