Fig. 2989.
The work is commenced by piling and welding on the porter-bar at the point in the shaft marked a. The stubs b and c having been previously prepared, the pile on the porter-bar is heated and welded up and drawn, shown in [Fig. 2984], and scarfed as shown in [Fig. 2985]; the piece, shown in [Fig. 2986], is then laid in the scarf and welded; then the part from b to a is finished to size, the finished forging of the post being shown in [Fig. 2984]. The surplus stock to the right of b, [Fig. 2984], is worked down into the post e, and the distance from b to f is thus made correct without loss of stock or time. The curve at d, [Fig. 2983], was worked down somewhere near, and then another pile and weld carries the job to g. Here the same operations as at first are repeated, and the arm c is welded in. There is left a good lump of stock in front of c, and by another pile and weld enough is added to make the job to i, as shown in [Fig. 2987]. Holes are then punched at j and l, and the piece of stock m cut entirely out. A cut is made to l with a hack opening out the piece n from the shaft. A taper punch, with a 3-inch point and a 4-inch head, is then driven at l; to throw the piece n out into the position shown at n1, [Fig. 2983]; n1 is then finished, and the post from l to j brought to forging size; then, by the ordinary process of piling, welding and drawing, the shaft is finished from i to o. Next the porter-bar is cut off, so as to leave stock enough to make the lower part of the shaft, as shown in [Fig. 2988]. A hole was punched at q, and the stubs drawn out, as shown in [Fig. 2989], which gives the post complete.
Fig. 2990.
Fig. 2991.