Patent GB-615440-A (GB)
Title: Improvements relating to automatic yarn and analogous winding machines
IPC: B65H54/14
Filed: 1945-11-07
Abstract: 615,440. Winding yarn &c. CLARK, D.M. (Abbott Machine Co.). Nov. 7, 1945, No. 29667. [Class 120(ii)] An automatic yarn &c. winding machine comprises means for rotatably holding a winding bobbin, a thread guide located below the bobbin to cause the thread to approach the bobbin by running upwardly from beneath it, means for discharging the wound bobbin from the holding means, means for supplying a fresh bobbin to the holding means and thread-positioning means for moving a portion of thread that has passed the thread guide from below the holding means upwardly thereto for engagement of the thread with a fresh bobbin. A plurality of winding units 1 are arranged around a closed track comprising upper and lower rails 2, 3 each winding spindle being driven by a motor 60, energized from conductor rails 40, 41, and furnished with a yarn supply 6, a yarn feed device 7, a thread detector 8 and a thread traverse device 9. This latter device comprises a thread guide 68, positioned below the package being wound, a rod 20, reciprocated by the motor 60, and a cage-like device 61, 62, 63, which fits frictionally on the rod 20. A stationary bar 72 of the machine frame is fitted with a rack 78 with which a tooth 75b on a feeler 75 engages when the feeler 75 is moved by contact with the yarn package, so to limit the movement of the traverse carriage towards the base of the bobbin and move the carriage 9 forwardly on the rod 20. When the package has grown to the predetermined length, a projection 62c on the .carriage 9 turns a rod 85 to effect the stopping of the wind, e.g. by lifting brushes from the conductor rails 40, 41. Similarly the thread selector 8, upon breakage or exhaustion of the thread, operates the stop motion. At the completion of the wind, a stationary cam 120 contacts with the roller 81 on the thread traverse device 9 to move it clear of the tip of the bobbin so that it may fall on to a stationary plate 500 when the centre 31 is withdrawn by contact between a lever 34 and a stationary cam 36. Further motion of the winding unit rolls the filled bobbin on the plate 500, the edge of which guides the thread and the stationary cam 310 moves the thread traverse device 9 towards the base of the bobbin thus effecting some spaced yarn wrappings on the package. The yarn is now taken up between the thread guide and the bobbin by a cam-operated clamping and cutting device 150 which clamps the yarn and cuts it and moves the clamped end forwardly and upwardly to extend across the inner bobbin-driving centre 30 where it is gripped by a fresh bobbin taken from a hopper feeder by a trip device 93, 94, 95 and' held in fingers 105 in the path of the approaching unit. The wound bobbin rolls off the plate 500 on to a slide or into a suitable receptacle. In a modification, the spaced outer return wrappings of yarn are wound on the package, while it is still held in the centres 30, 31, by the rotation of the spindle by a friction pad the cam-operated clamping and severing device 150 operating on the yarn between the guide eye 68 of the wound package and moving the yarn upwardly across the centre 30 from which the wound package has just been released. In this modification, the rack bar 78 is pivotally mounted so to be swung clear by the stop mechanism to allow the free return of the traverse device. Specifications 588,718, 604.354, 608,219, 615.439, and 615,511 are referred to.