Patent GB-322999-A (GB)
Title: Improvements in or relating to coil winding machines and the like
IPC: H01F41/06
Filed: 1928-07-12
Abstract: 322,999. Owen, C. J., and Automatic Coil Winder & Electrical Equipment Co., Ltd. July 12, 1928. Winding-machines. - In a coil winding machine paper or like insulating material is automatically fed between the layers of the coil by means including an intermittently rotated feed roller, means for automatically increasing the lengths of paper fed and means for regulating the amount of the increase in length. The paper is wound under even tension and the length fed is controlled by a measuring roller 35, Figs. 2 and 7, having two slots 36, 37 the circumferential distance apart of which increases progressively from one end of the roller to the other. In a machine of the type described in Specification 199,417, a motor 14 is adapted to drive the winding bobbin 15 and, through adjustable friction gearing 17, 18, 22, a leading screw 23 along which the guide device 30 is traversed, the wire being fed from a bobbin 24 over a tension roller. The paper is fed from a roll 123, the feeding device being arranged between standards 33, 34 and comprising the measuring roller 35 and a leading screw 38 provided with a half-nut 39 counter-weighted at 43 and secured to a collar 40 slidable on a rod 41 and carrying a bell crank lever 42 having at the forward end of its horizontal arm a pin 45 adapted to engage the slots 36, 37. The screw 38 is driven from the leading- screw 23 through worm gearing 47, a friction clutch 49, gear wheels 50, 51, 53 and adjustable friction gearing 54, 55. Feed rolls 62, 65, Figs. 5 and 6, are driven from the gear-wheel 53, a band conveyer 66 extending round the rollers 65, while a guillotine 67 is mounted on a spindle 69. A rod 72 having stops 74 - - 77 is mounted in the standards 33, 34 an arm 73 on the guide carriage 30 extending rearwardly between the stops 74, 75 and a cylindrical member 78 having bevelled ends 79, 80 being arranged between the stops 76, 77. In winding a coil the wire is fed to the bobbin 15 through guide devices 125, 126 and at starting the pin 45 is in engagement with the spiral slot 37 of the roller 35 thereby holding the roller and causing the clutch 49 to slip and the paper feed to be inoperative. The guillotine 67 is also raised. As the guide device 30 traverses on the screw 23 the arm 73 engages one of the collars 74, 75 and moves the rod 72 laterally until the member 78 abuts against an arm 82 connected at 83 to a timing rod 86, Fig. 4, the arm 82 ultimately riding over the bevelled end of the member 78 and moving the rod 85 forward. A pin 91 on a projection 90 simultaneously rocks the bell crank lever 94 thereby lifting the jockey roller 105 releasing the guillotine 67 and causing a projection 98 on a rod 95 to rock the bell crank lever 42 and lift the pin 45 out of the slot 37. The clutch 49 thereupon drives the roller 35 and the conveyer 66 to feed forward any paper cut off by the guillotine 67 until stopped by the pin 45 abutting against the wall of the slot 36. When the arm 82 reaches the end of the cylindrical part of the member 78 the latter will move on the rod 72 under pressure of the arm 82, the rod 85 then returning to its normal position the guillotine 67 being raised the jockey roller 105 falling on to the feed roller 62 and the bell crank lever 42 being again rocked by the projection 98 to lift the pin 45 from the slot 36 permitting further rotation of the members 35, 66 until the pin 45 abuts against the wall of the slot 37. During this rotation any paper on the conveyer 66 is fed forward on the conveyer 113 to the bobbin 15 and paper is fed forward by the roller 105 on to the conveyer 66, the amounts depending on 'the axial position of the pin 45 along the slots 36, 37. These operations are repeated during each reciprocation of the guide device 30 the feeding of the paper taking place in two stages that corresponding to the movement of the pin 45 from the straight slot 36 to the spiral 37 controlling the length cut off and that from the slot 37 to the slot 36 constituting a feeding movement of the paper already cut off. The sum of these movements is constant, the feed of the half-nut 39 along the screw 38 ensuring the gradual increase in the length of paper cut off. The first Provisional Specification describes a modified form of operating device.