Patent GB-815936-A (GB)
Title: Improvements in or relating to barbed wire manufacture
Inventor: RANNEY NEIL JASTER
IPC: B21F25/00
Filed: 1956-12-10
Abstract: 815,936. Making barbed wire. WEAN EQUIPMENT CORPORATION. Dec. 10, 1956, No. 37628/56. Class 83 (4). Apparatus for making barbed wire in which line wires are intermittently advanced lengthwise and barb-forming wires are intermittently advanced transversely to the line wires, a barb or barbs cut from said barb-forming wires being twisted about at least one of the line wires when it is stationary, includes a plurality of spacedapart grippers rotatable about the circumference of a circle to receive the line wires from means intermittently advancing them and to continuously advance the line wires to means which twist them together and coil the completed barbed wire on a spool. Two line wires 10 pass from spools, around sheaves 11, 12 and along slots 14a, one in each slot, in a fixed guide 14. Barb forming wires 17 pass from two other spools and are fed by rollers 18 from each side of the machine along guides 27 to pass one between the two line wires 10 and the other beneath them. The rolls 18 are intermittently rotated by a rack 49 on a cutter block 44 vertically reciprocated by an eccentric sleeve 47 on a main drive shaft 37, the rack 49 turning a pinion segment 22a which through ratchet means 22b, 22c turns a shaft 22, and thus the rolls 18, on the downward stroke only of the block 44. When sufficient wire 17 has been fed past the line wires 10 and with these wires 10 stationary, coiling pins 31 mounted on the end of a sleeve 33 keyed in a rotating gear 34 are moved forward axially with the sleeve 33 to engage the wires 17 and twist them around the line wires 10 and then to move back. The sleeve 33 is moved axially by a yoke 38 on a slide 40 moved by a cam 41 on the shaft 37. The twisted barbs are then severed from the wires 17 by shear blades 43 on the cutter block 44 cooperating with the guides 27. After a barb has been formed on the line wires they are then advanced to bring them into position to form the next barb by a slack take-up wheel 50 and wiregripping and transfer wheel 54. The wheel 50 is mounted for rotation on an eccentric shaft 51 on a block 52, Fig. 15, adjustable radially of a shaft 53 driven from the main shaft 37. The wheel 54, which is continuously rotated, carries wire-gripping members 56 around its periphery each of which includes a fixed slotted wire guide 57 and, pivotable therearound, a bracket 59 having two upstanding segmental portions 60 and carrying a roller 61 which engages a fixed cam 63a to rock the bracket 59 to grip the wire between the segments 60 and the guide 57 during part of a revolution of the wheel 54. As the take-up wheel 50 moves to the left, Fig. 6 (not shown), in its orbital movement slack is created in the line wires 10 so that they stop for barb-forming. The eccentricity of the shaft 51 determines the distance between the barbs on the line wires 10. Twisting wires together; reeling. The line wires 10 with the barbs attached pass from-the wheel 54 and over a pulley 68 positioned above the centre of twisting and coiling mechanism. This includes a hollow mandrel 70 rotated by gearing 74 and having secured thereto a bedplate 78 carrying a yoke 79. A spool arbor 97 is rotatably and slidably mounted within the mandrel 70 and is moved axially by an hydraulically actuated rod 104. The arbor 97 has two projecting fingers 100 which pass through a pair of slots of corresponding section in a table 84 supported on the arbor and enter a wire spool 101 to engage and drive it, its upper end being engaged by a cover 108. The table 84, and thus the spool 101, is rotated at a speed different from that of the plate 78 and yoke 79 by the following means. A shaft 90 journalled in the plate 78 has formed at its upper end a pinion 91 meshing with a gear 85 attached to the table 84. A spur gear 93 engaging a fixed gear ring 96 is spring-urged against a friction disc 95 on the lower end of the shaft 90. The line wires from the pulley 68 pass around a pulley 113 on the yoke 79, thence around a traversing pulley 111 on a shaft 112 on the plate 78 which delivers them to the wire spool 101 the rotation of the yoke 79 twisting the line wires 10 about one another as they leave the pulley 68. Rotation of the spool 101 winds the finished barbed wire thereon, the friction disc 95 permitting the speed of the spool 101 to vary as the wire is wound. A counter may stop the machine when a desired amount of wire has been wound on the spool 101.