Abstract: An apparatus for determining the top and the bottom surface of a metallic workpiece, such as a steel slab. The apparatus is positioned proximate to the workpiece and includes a rail beam which may be translated across the width of the workpiece. A first arm is pivotally coupled to a first end of the rail beam and a second arm is pivotally coupled to a second end of the rail beam. The two arms are pivotally interconnected at top ends thereof by a tie rod, thereby forming three sides of a parallelogram. Deflection of the first arm during translation of the rail beam across causes a similar deflection of the second arm. The deflection of the second arm may be recorded, thereby recreating the surface profile of the workpiece.

Abstract: A device for copying panoramic images includes a screen provided with structure for inclining and fixing the screen. There are defined two like, adjacent sectors successive in height, one of which is transparent and through which the panoramic image to be copied is visible, and the other serving as a graphic board for the reproduction of the panoramic image. The screen is provided with means for transferring the image and preferably a transparent ruler which can move transversely by sliding or by rolling on wheels or bearings, on end guides and, if necessary, also on a central rail in the line of separation between sectors, or without any rail, by means of wheels and threads, and permanently perpendicular to the line of joining between the transparent sector and the opaque sector of the screen.