Messrs. Slocum Sayles, of Lansingburgh, Rennselaer Co., N. Y., have taken measures to secure a patent for improvements in the ibove-named machine. It should be explained that this is a machine for bending bars of iron into a shape that is often employed, particularly for ornamental fences, house-work, c, we mean the zig-zag shape. The rolling mill employed for this purpose consists of two under rollers placed side-by-side, and of two apper rollers,—the latter two running in bearings which can slide up and down in the framing, so as to recede from, or advance to, the under rollers. Between these two sets of rollers there slides a bed, which carries the dies intended to impress the desired form on the iron. The patent more particularly applies to the construction of these dies. They are lorm-ed in pairs, so that the projections of the upper die fit into the recesses of the lower one. Their shape, in general, is angular, and the upper die is so formed with joints that each angular piece can be forced into its corresponding cavity in the lower die, without the necessity of its fellow projections partaking of the motion. The bar of iron being placed between the dies, which are fixed on the movable table, a chain or cord is attached from the table to the further ol the lower rollers, so that the former may be drawn along as the rollers revolve. The upper rollers, which give the pressure, are forced down. to their work by weighted levers, hence when the machine is set in motion, the table and dies are drawn between the rollers, and the first jointed projection of the top die is forced into its recess in the lower die, thus giving the iron bar the desired shape. The table continuing to advance, is caught between the second pair of rollers, which hold the bar from shifting whilst the second projection is descending, and in this manner the process goes on until the whole length of the bar is fashioned into the shape required. The inventors do hoffrmifine themselves to this sort of die alone, but propose another mode also, in which both top and bottom dies are made flexible.
This article was originally published with the title "Machine for Crimpling Iron Bars" in Scientific American 8, 8, 59 (November 1852)