Gauging apparatus

Claim 1

A GAUGING APPARATUS, PARTICULARLY FOR THE CONSTRUCTION OF LARGE TOOLS, FOR FITTING GAUGING MODELS AND PATTERNS UPON OR INTO WORKPIECES TO DETERMINE WHETHER THEY ARE TRUE TO SIZE, COMPRISING SOLID UPRIGHT GUIDE MEANS, A MODEL SUPPORTING MEMBER, MEANS FOR MOUNTING SAID SUPPORTING MEMBER ON SAID GUIDE MEANS SO AS TO BE SLIDABLE IN A VERTICAL DIRECTION ALONG SAID GUIDE MEANS, HOLDING MEANS RIGIDLY MOUNTED ON SAID SUPPORTING MEMBER FOR SECURING AT LEAST ONE GAUGING MODEL THEREON, SAID LAST MEANS BEING ADJUSTABLE IN A HORIZONTAL PLANE, AND DRIVING MEANS FOR RAISING AND LOWERING SAID SUPPORTING MEMBER WITH RESPECT TO THE GUIDE MEANS, A BASE PLATE, SAID GUIDE MEANS COMPRISING A PAIR ONLY OF UPRIGHT CYLINDRICAL GUIDE COLUMNS RIGIDLY MOUNTED ON SAID BASE PLATE IN SPACED RELATION TO EACH OTHER, SAID MODEL SUPPORTING MEMBER COMPRISING A SINGLE HORIZONTAL BEAM, SAID MOUNTING MEANS OF SAID SUPPORTING MEMBER COMPRISING A TUBULAR MEMBER RIGIDLY SECURED TO SAID SUPPORTING MEMBER AT EACH END THEREOF AND AT LEAST TWO SLIDE BEARINGS ON EACH OF SAID TUBULAR MEMBERS DISPOSED IN VERTICALLY SPACED RELATION TO EACH OTHER ON EACH OF SAID GUIDE COLUMNS AND SLIDABLE ALONG SUCH COLUMN IN A VERTICAL DIRECTION TO GUIDE SAID MODEL SUPPORTING MEMBER SO AS TO EXTEND HORIZONTALLY AT ANY ELEVATION TO WHICH IT IS ADJUSTED, BOTH OF SAID COLUMNS EXTENDING UPWARDLY FROM SAID BASE PLATE, EACH OF SAID TUBULAR MEMBERS ON SAID MODEL SUPPORTING MEMBER TELESCOPING OVER AND BEING ADAPTED TO SLIDE ALONG ONE OF SAID COLUMNS AND EXTENDING COAXIALLY THERETO, SAID DRIVING MEANS COMPRISING A SOURCE OF A FLUID PRESSURE MEDIUM, AND MEANS FOR CONTROLLING THE FLOW OF SAID MEDIUM SO AS TO ACT UPON SAID TUBULAR MEMBERS IN BOTH DIRECTIONS TO MOVE THE SAME POSITIVELY ALONG SAID GUIDE COLUMNS.