Patent GB-340095-A (GB)
Title: A wire tying machine
IPC: B65B13/28
Filed: 1929-11-11
Abstract: 340,095. Wright, I. B. Nov. 11, 1929. Wire strainers. - A wire tying machine, in which lapped ends of a piece of wire are held together to produce oppositely directed twists, has a tying head which is movably disposed adjacent to lapped portions, means actuated in predetermined timed relation with the movement of the head being provided for seizing the wire for tensioning purposes. The base 2, which rests on the box and has a handle, 4 and buttons 6 to enable the operator to steady the machine during operation, is provided with fixed jaws 7, 8 against which the lapped wires are normally held in superposed position by jaws 11, 12 mounted on the ends of shafts 13 rotated by springs 14 and carrying fingers 38 to engage stops 39. One end of a wire is placed in a conical recess 21 with sharp edge 22 in a tensioning arm 16 pivoted at 18 and the wire is passed through the jaws, round the box, and then again through the jaws, and the other end is passed over a notched plate 23 and pin 24 on a second pivoted tensioning arm 17. If the wire is fed from a roll the plate 23 and pin 24 are replaced by a quick action clamp. The tensioning arms are normally held retracted by a spring 26. The twisting mechanism is mounted in a housing 28 on arms 27 pivoted to the base so that it may be pulled down by a handle 29 to engage over the lapped wires, at the same time operating the tensioning arms. The tensioning is effected by cams 32 on the ends of a pair of adjustable telescopic spring-pressed bars 33 carried by the arms 27 engaging rollers 31 on the arms 16 and 17, the upper portions of the cams being shaped as shown in Fig. 4 so that the spring pressed arms 16, 17 maintain the housing 28 in its downward position. The housing carries a spaced pair of slotted twisting pinions 51, Fig. 9, which are driven in opposite directions by spur and bevel gear 54, 58, 56, 57 from a bevel pinion 59 fixed on a shaft 61 secured to the handle 29. The ends of the casing are closed by slotted plates. Two rotations of the twisting pinions may be effected by four rotations of the handle 29, which may be automatically stopped. For this purpose the single tooth member 65 of a Geneva gearing is journaled on the shaft 61 and provided with a, pin 66 normally pressed by a spring 68 against one end of a recess 67 in a bearing 62. The star gear 69, which is journaled on the handle, is normally free to rotate, but at the end of one rotation thereof it is locked to the handle by a pin 72 carried by a lever 73 and spring pressed rod 74. The handle may then be moved with the gear so as to compensate for the resilient recovery of the twists, whereupon the handle is returned by the spring 68 to bring the slots 52, 48 in the pinions 51 and bearings 41, 42, 43 into alignment. The free ends of the wire are severed at opposite ends of the twist by spring-controlled cutter levers 79 operated by cams on shafts geared to the shafts 53. The cut ends during the completion of the twist are drawn through the slots in the end plates and finally rest on the side of the adjacent wires so as to avoid sharp ends. The inside of the slots may be backed off to facilitate this operation. On moving back the arms 27, the arms 16, 17 are released and fingers 37 on the arms 27 engage the fingers 38 on the shafts 13 so as to turn down the fans 11, 12 and allow the tied wire to slip off the machine. Specifications 154,132, 167,010, 197,020 and 202,335 are referred to.