Patent GB-190100489-A (GB)
Title: Improvements in Machines for Making Horse Shoe Nails.
Inventor: ABBOTT BENJAMIN JUDD
Filed: 1901-01-08
Granted: 1901-02-16
Abstract: 489. Abbott, B. J. Jan. 8. Nails for horse-shoes, making. The machine cuts off the blanks from a length of wire, rolls the blanks alternately on the sides and edges, transfers the blanks to dies carried on an endless chain, heads them in these dies, and then discharges them. The machine is duplex, two blanks travelling down side by side. Mechanism is arranged to stop the feed when the wire is used up, and to stop the machine when a nail gets accidentally jammed at any point. All the Figures show views taken in a vertical plane. A sensitive clutch is used, and is thrown out of gear by a spring when the shaft 32, Fig. 17, is rocked. The driving-pulley 46, Fig. 32, is connected to the shaft 47 by a divided ring 410, the halves of which are fixed at one end to arms 411 fast to the shaft, and are opened out at the other end by levers 414 pivoted at 417 and provided with set-screws 415 for bearing on a sliding cone. The clutch operating-lever and the link 50, Fig. 39, of the starting-lever are pivoted to the lever 51, which is allowed to swing back when the dog 37 is released by the rod 34, connected to an arm on the shaft 32. The wire is alternately fed and released by the rolls 54, Fig. 6, and the wire is kept from springing back by the jaws 3, 3. The wire passes through a hole in the rod 24, Figs. 6 and 8, and, when the end has cleared this hole, the rod is thrown to the left by the spring 26. The rod 24 is connected to the rock-shaft 32, and the machine is thus stopped. The blanks are severed by the fixed and movable knives 57, 61, Fig. 8, respectively. The severed blank 400 is kept vertical by the knife 61, which pauses at the end of its cut. Should the blank 400 get clogged, the knife 61 presses it against a block 16, and moves the rods 17,18 connected by a lever to the rod 23, Fig. 6. The lever 13 sup. porting the pin 15 of the toggles 9 is thus moved aside, and the weighted lever 10 straightens the toggles and closes the jaws 7, 8 to stop the feed. The nail channel between each pair of rolls and below the lowest pair 103, Fig. 17, has a movable wall 110, on an arm 111, pivoted at 112 and connected to a sliding rod 113. Should a nail get clogged, the part 110 moves downwards and outwards, so that the obstruction can be removed. At the same time the machine is stopped by the rod 113, which trips the pawl 116 and allows the spring 119 to force out the rod 127. An incline on the rod 127 acts against a sliding bar pivoted to an arm on the shaft 32. The blank thus arrives at turn-plate 140, which has a step-by-step motion and brings the blank into a horizontal position so that it may be forced by a slide between the loose dies 210, 211 carried on the chain 212, Figs. 17 and 30. Should the blank project slightly beyond the plate 140,the hinged door 148 is opened and the machine stopped. The turn-plate is moved by a ratchet-wheel 227, Fig. 27, and pawl 226 on the yoke 222 actuated by a cam 156. A pawl 240 and ratchet-wheel 241 ensures accurate movement, and a stop 252 actuated by a cam 255 and spring 258 and engaging with the wheel 251 ensures the accurate position of the turn-plate. The turnplate is also locked at intervals by a lever 260, Fig. 17, which engages with the slot 152, when its lower end is pushed outwards by a bar 262, attached to the reciprocating tube 177 actuating the ejector slides. These slides are carried by the turn-plate, one slide being provided for each opening in the plate. The slides are kept in place by a ring 195, one side of which is gapped to allow the tube 177 to engage each slide in succession, and move it outwards. The tube 177 is operated by a rod 164. Should the nail stick in the turn-plate, the rod 164 slides in the tube 177 against the action of a spring, and a projection strikes against the stop 183 on the rod 184 connected by levers &c. to the shaft 32, which stops the machine. The dies 210, 211 are pressed together, when beneath the heading- plungers 284, by the bent ends of toggles 290, 289 and a central bar which comes between two pairs of dies. The bar and plungers are carried by a head 283, actuated by an eccentric and rod 282. The toggles 289, 290 are actuated by rods 299 and crank arms 298, and the movement of the links 290 is partly controlled by rods 303, which are pivoted to the links 290 and drawn up by springs 312. The nails are ejected by the rod 343 actuated by a crank and connecting-rod 342. Should the nail not be ejected properly, it catches against the lug 350 or 351, thus actuating the shaft 352 and rod 184, Figs. 30 and 17, and stopping the machine.