Scanning instrument

Claim 1

A SCANNING INSTRUMENT FOR MEASURING AND RECORDING THE LOCATIONS OF SELECTED POINTS IN A COPY LAYOUT IN TERMS OF THEIR RECTANGULAR COORDINATE DISTANCES FROM AN ASSUMED ORIGIN, SAID INSTRUMENT COMPRISING A LAYOUT BOARD HAVING AN ORIGIN OF RECTANGULAR COORDINATES THEREON AND MUTUALLY PERPENDICULAR X AND Y COORDINATE AXIS DIRECTIONS THEREON INTERSECTING AT AND PROCEEDING FROM SAID ORIGIN, A SUPPORTING STRUCTURE DISPOSED ADJACENT SAID LAYOUT BOARD AND HAVING AN ELONGATED RECTILINEAR GUIDEWAY AT ONE SIDE OF THE BOARD DISPOSED PARALLEL TO SAID Y-AXIS DIRECTION, A CARRIAGE MOUNTED ON SAID SUPPORTING STRUCTURE AND MOVABLE ALONG SAID GUIDEWAY PARALLEL TO SAID Y-AXIS DIRECTION, SAID CARRIAGE HAVING AN ELONGATED GUIDE MEMBER SECURED AT ONE END TO SAID CARRIAGE AND PROJECTING FROM SAID CARRIAGE OVER SAID LAYOUT BOARD, SAID GUIDE MEMBER HAVING THEREON AN ELONGATED RECTILINEAR GUIDEWAY DISPOSED LONGITUDINALLY THEREOF AND PARALLEL TO SAID X-AXIS DIRECTION, A CROSS-SLIDE MOUNTED ON SAID GUIDE MEMBER IN GUIDED SLIDING ENGAGEMENT WITH SAID LONGITUDINAL GUIDEWAY, AN INDICATING POINTER MOUNTED ON SAID CROSS-SLIDE WITH ITS AXIS DIRECTED DOWNWARDLY THEREFROM TOWARD SAID LAYOUT BOARD, AN OPERATING HANDLE ROTATABLY MOUNTED ON SAID CARRIAGE AND ADAPTED WHEN PUSHED AND PULLED TO MOVE SAID CARRIAGE AND GUIDE MEMBER BODILY BACK AND FORTH RESPECTIVELY ALONG THE FIRST-NAMED GUIDEWAY, MECHANISM OPERATIVELY CONNECTING SAID HANDLE TO SAID CROSS-SLIDE AND RESPONSIVE TO THE ROTATION OF SAID HANDLE FOR MOVING SAID CROSS SLIDE AND POINTER TO AND FRO ALONG SAID LONGITUDINAL GUIDEWAY, AN ENCODER MEANS RESPONSIVE TO THE MOVEMENTS OF SAID CARRIAGE AND CROSS SLIDE ALONG THEIR RESPECTIVE GUIDEWAYS FOR MEASURING AND RECORDING THE DISTANCES ALONG SAID X AND Y AXES FROM SAID ORIGIN TO SAID POINTER WHEN MOVED INTO REGISTRY WITH SELECTED POINTS ON SAID LAYOUT BOARD BROUGHT INTO REGISTRY WITH SAID POINTER BY SAID MOVEMENTS OF SAID CARRIAGE AND CROSS SLIDE RESPECTIVELY.