Patent GB-128877-A (GB)
Title: Chain Making Machine.
IPC: B21L11/00
Filed: 1919-02-27
Abstract: 128,877. Marks, E. C. R., (Sanderson, R. S.). Feb. 27, 1919. Making chains; angular bending; bending-formers; shearing adjuncts.-A machine for making chains, particularly for personal wear, has its working parts so formed as to produce long and short links in definite sequence, which sequence may be varied. Two cam-shafts 23, 25, Figs. 1 and 3, for operating the parts, are connected by gearing 26, 27, 28, the adjustment of which varies the sequence of long and short links. The wire 19 is fed forward by a slide 30 and cam-actuated plate 33, Fig. 2, the slide being moved by the cam 38 through the arm 39. The length of wire fed is determined by the initial position of the end 41 of the arm 39, the rear end of the slide 30 having a screw with stop nuts, and a stop screw 52 controlled by a cam 54 on the shaft 25 is adapted to shorten the length of wire fed when a short link is to be made. The wire is prevented from moving back by a cam-actuated pin 45. The wire now extends over the cutter anvil 49 and forming head, and its extremity rests on the support 50. The cutter 59, Figs. 1 and 7, is carried by a plunger 80 mounted in a carrier 68 adapted to be moved longitudinally by a roller 66, which is operated by a cam on the shaft 25. The cutter is therefore moved along the wire to cut off a shorter length when a short link is to be formed. The plunger 80 is depressed to operate the cutter 59 by a lever 82 or 84 according to the position of the carrier 68, these levers being actuated by cams on the shafts 23, 25. The length of wire is bent round an arbor 86, Fig, 12, which is slidably mounted in a sleeve 88 carried on a reciprocating member 89. The arbors is withdrawn by a cam on the shaft 28 and may be held back for the formation of a short link bv a camcontrolled stop 99. A cam 94 causes the arbor to descend lightly to hold the length of wire, and subsequently the cam 103 forces the arbor down to bend the wire between the jaws 87. In the case of a long link being formed, a further downward movement of the arbor is obtained by means of the cam 107. After the wire has been bent, the ends are closed together by fingers 109, Figs. 3 and 4, mounted on a T head 111 in a sleeve 115. The fingers are carried forward by the cam-actuated arm 121, and when the T head 111 is held by the stop 113, the further movement of the sleeve 115 causes the screws 122 to press the spring fingers 109 on the ends of the link. The link 7 is completed by means of the die 123, Fig. 6. The jaws 87. Fig. 7, of the link-forming head, by means of which the. links are connected together, are pivoted at 130, and are controlled by the sliding head 131. The inner shaft 133 carries a link-supporting fork 134, Fig. 11, on the head of which the link rests when bent. After a link has been completed, and the arbor 86 has been withdrawn, the cams 145, 146 on the shaft 23 actuate the arm 148, Fig. 7, causing the pin 149, which works in a slot in the lever 150, to rotate the link-forming head through 90 degrees. The head is raised by the cam-actuated levers 141, 153, and when the head is in this position, the succeeding length of wire is threaded into the formed link as the wire is fed forward. The lever 141 then allows the head 131 to descend, and the jaws 87 to open; subsequently the linkforming head descends and the head rotates back to its original position. The head is prevented from rising during the bending operation by pins on it engaging under overhanging lips.