GB190307660A - Improvements in Automatic Wire Fence Machinery. - Google Patents

Abstract

7660. Harris, J. April 2. Fencing; wire netting.-Relates to the manufacture of wire fencing with waved line wires and transverse or stay wires twisted at their ends round the top and bottom line wires and clamped to the intermediate lines by rings. The crossings of the two wires 41, 42 are held in cross grooves in the lower dies adjustable along a bar 11 lifted by a cam 16 on the shaft 6. A staple is dropped across them from the feeding- device 120, and the upper plungers 17 are brought down by cams 35 to form the staple into a ring to clasp the two wires. The plungers, like the dies, are also adjustable to suit the spacing of the wires, and the cams 35 are set with a lead on their shaft to act successively. Each longitudinal edge wire 42 passes through a sleeve 68, Figs. 6 and 9, on which is a projecting roller 70 to engage the end of the stay wire 41. The sleeve is revolved by a rack 73, lever 72, and cam 71, at the same time being retracted through its screwed bearing 66 so as to twist the stay wire round the edge wire. Wire is drawn from a reel through horizontal and vertical straightening-rollers 47, carried by an adjustable clamping-holder 103, and is fed across the machine by gripping-rollers 48. These rollers are driven by a ratchet and pawl gear 54, which is operated from a rack 50, lifted by a cam on the shaft 6. The length to form the transverse stay wire is cut off between knives 57, one of which is carried by the movable die-bar 11. The wire is guided between and across the dies by fixed guide-blocks 60 on one side and hinged guide - blocks on the other side, the latter yielding when the fencing is drawn forward. The feed for the U-shaped staples is shown in Figs. 5 and 29. They are picked up and delivered on to the slide 126 by a plate 122, which is reciprocated vertically in the box 120 by the lever 132 and cam 131. The box is divided by a partition 130, the second compartment serving to catch staples, spilt over from the fast part. From the bar 126, they are delivered one by one in a vertical position, by three fingers 134, 135, 136 carried by a slide 137, which is reciprocated by a slotted link from the upper plungers or dies. The first finger 134 separates a single staple, a gate or opening in the second finger 135 allows it to pass, and the third finger 136 guides it into a vertical position. The fencing is drawn through the machine, and the longitudinal wires are bent to their waved form, by the arrangement shown in Figs. 11 and 12. Sliding dovetailed bars 84, carrying blocks 87, are mounted on the drum in pairs and are caused to move in opposite directions by fixed cams acting on their roller ends so that the blocks 87 grip and bend the wires. The drum is rotated by a pawl and ratchet gear worked from a cam on the shaft 6.