X-y recorder having intercoupled cordpulley means for independently x-y drives

Claim 1

A TWO-COORDINATE RECORDER COMPRISING A FIRST GUIDE-STRUCTURE STATIONARILY MOUNTED ON A BASE STRUCTURE, A SECOND GUIDE-STRUCTURE SUPPORTED BY AND MOVABLE ALONG SAID FIRST, STATIONARY GUIDE-STRUCTURE, A MARKER ELEMENT SUPPORTED FOR LINEAR MOVEMENT ALONG SAID SECOND GUIDE-STRUCTURE AT A FIXED ANGLE TO SAID FIRST GUIDE-STRUCTURE, FIRST AND SECOND REVERSIBLE DRIVE MEANS LOCATED AT FIXED LOCATIONS WITH RESPECT TO SAID FIRST GUIDE-STRUCTURE, A FIRST CABLE-PULLEY MEANS FOR COUPLING THE DRIVE MEANS TO SAID MARKER ELEMENT TO EFFECT ITS MOTION ALONG SAID SECOND GUIDE-STRUCTURE, A SECOND CABLE-PULLEY MEANS FOR COUPLING THE SECOND DRIVE MEANS TO SAID SECOND GUIDE-STRUCTURE TO EFFECT MOTION THEREOF ALONG SAID FIRST GUIDE-STRUCTURE AND SO EFFECT LINEAR MOTION OF SAID MARKER ELEMENT PARALLEL TO SAID FIRST GUIDE-STRUCTURE, AND MEANS FOR INTERCONNECTING YET EFFECTIVELY ISOLATING SAID FIRST AND SECOND CABLE-PULLEY MEANS TO OBTAIN MOTION OF SAID MARKER ELEMENT ALONG THE SECOND GUIDE STRUCTURE ONLY BY SAID FIRST DRIVE MEANS AND MOTION FOR SAID MARKER ELEMENT PARALLEL TO SAID FIRST GUIDE-STRUCTURE ONLY BY SAID SECOND DRIVE MEANS, SAID INTERCONNECTING MEANS INCLUDING A FLOATING LINK WHICH FOR COORDINATE MOTION OF SAID MARKER ELEMENT WITH RESPECT TO SAID FIRST GUIDE-STRUCTURE MOVES IN DIRECTION OPPOSITE TO THE DIRECTION OF MOVEMENT OF SAID SECOND GUIDE-STRUCTURE FOR HALF THE DISTANCE.