Device to follow lines on a drawing and to register the ordinates of given points of said drawing

Description

FIG. 1 is a top perspective view of a device to follow lines on a drawing and to register the ordinates of given points of said drawing, showing my new design, the side of the device opposite the flat surface shown in FIG. 1 being flat and plain and of the same size as the flat surface shown in FIG. 1;

FIG. 2 is a top perspective view thereof from a different angle than the angle of FIG. 1; and

FIG. 3 is a bottom perspective view thereof.