342 



MINT 



rounding faces come down, those openings are much narrowed, so that any fillet placed 

 between them becomes thinned to just such an extent as may be deemed necessary. 



1529 



1531 The rollers travel in opposite directions, so as to cause the 



expulsion of a fillet placed between them. The fillets are 

 rested on L while being flatted, and are, after flatting, 

 placed in a trough, from which they are taken to a rolling- 

 mill in the drag-room, of precisely the same construction 

 as that exhibited at fig. 1527, to be passed twice through 

 at equal pinches, with a view to render them still more 

 accurate than they were when leaving the rolling-room, 

 as well as to reduce them to the exact thickness at which 

 the tryer has found they will' produce the best work at 

 the draw-bench, to which they are now taken for final 

 adjustment. The rolling-mill in the drag-room was 

 provided with steel rollers, which have been wisely 

 abandoned. 



Figs. 1532, 1533, represent the head of the draw-bench, 

 the name of which is retained, as being in fact its 

 only appropriate one. The flatted end of each fillet is 

 passed into the opening shown. The dog, fig. 1532, is then run up till its teeth seize 

 the fillet. The lever is depressed until one of the hooks, f, catches a bar of the cir- 

 culating chain, B, which in its onward motion drags the dog, and causes it to bite the 

 fillet and draw it through the opening at which it has been entered. B gets its motion 

 from a notched cam, the axle of which is shown at o. There are two distinct chains 

 to each draw-bench, and there are two distinct draw-benches, so that one description 

 does for both double ones, c is a cogged wheel, the shaft of which, o, carries two 

 notched drums, and each drum gives motion to a chain, so that both chains travel at 

 the same pace, c is set in motion by the pinion, D, ou the shaft which is driven by 

 the wheel K, fig. 1534. B is driven by H, which is on the shaft driven by the strap 

 and drums o. Fig. 1533 is a representation of the head of the draw-bench, and in 

 studying this engraving it will be well to refer at the same time to jig. 1532. The 

 dog takes its name from its resemblance to the head of a bull-dog. It consists of a 

 pair of levers, whoso long arms extend beyond the axle-tree of the wheels d, and 

 whoso shortest arms are formed by the passing of the other axle-tree through the 

 lever. The teeth are set at the front of the short arms. The axle-tree near d is fixed 

 to the bars forming e, f, ;. :id runs loosely between the long arms of the lever, so that 

 when e,f is pulled forcibly it causes the axle-tree to open the long end of the levers, 





