Patent GB-681515-A (GB)
Title: Improvements in and relating to yarn winding machines
IPC: B65H67/02
Filed: 1950-11-14
Abstract: 681,515. Winding yarn. ABBOTT MACHINE CO. Nov. 14, 1950 [Nov. 29, 1949], No. 27791/50. Classes 120(ii) and 120(iii) A yarn winding machine comprises in combination means for rotatably holding a bobbin for winding thereon from a supply package of thread mechanism for automatically discharging a wound bobbin supply package of thread, mechanism for automatically delivering to the holding means a new bare bobbin to be wound, and mechanism for automatically attaching a new thread of a new supply package to the new bare bobbin. The invention, as shown, is particularly applicable to the machine forming the subject matter of Specification 604,354, and comprising a number of travelling winding units 15, the spindle of each of which is driven by a separate motor 19 taking current from conductor bars and tended by a tending mechanism for bobbin replacement, &c. Each winding unit is provided with a supply package on a conical peg 100, 100a. The thread therefrom passes through guides and tensioner 102. 103, 104 and thence over a detector wire 107 to the traverse guide 23. Upon thread breakage or exhaustion the wire 107 moves to release a latch to allow a brush-controlling lever to stop the motor 19 as in Specification 615,440. The same happens when a winding on bobbin becomes fully wound. In the present invention, the detector wire also initiates the operation of mechanism to replace the supply bobbin, each of which preferably contains an even multiple, say 2, 3 or 4 times the amount of thread required to fill a winding on package. On reaching the tending mechanism each filled bobbin is doffed and is rolled along the plate 32; the thread guide 23 being moved by a stationary guide 44a to the base end and open spirals of thread being wound about the filled bobbin, an upper plate 53 assisting in positioning the thread across the inner chuck to be gripped between it and an empty tube which is then supplied. The thread between the doffed bobbin and the chuck is then severed. When a winding unit 15 approaches the tending mechanism with its supply thread broken or exhausted, the dropped detector wire 107 tilts a mercury switch 140 to close a circuit removing a latch and setting a one-revolution cam shaft 119 in motion. This shaft carries cams 150, 151, 152, 153 which, through cracks and levers pivoted on a common shaft 155, effect the following operations: (a) the supply package P (not shown) is doffed by a plate 160; (b) a shoot 171. which receives a new supply package P<SP>1</SP> from a shoot 186 supplied from a rotatable magazine moved by pawl and ratchet 182, 183 and containing the new supply packages in compartments 180, is moved to feed a new package on to the peg 100, 100a. The magazine is rotated about a suction tube 187 in communication with a suction box 187a and fan 187b, the leading end of the thread on each new package P<SP>1</SP> being placed in the tube 187 by the operative on loading the magazine. When the package P<SP>1</SP> drops into the shoot 171 the thread therefrom positions itself in a vertical slot 180a in its previous container 180; (c) a bent arm 190 is raised to form a loop in the thread T<SP>1</SP> extending from supply and carry it into the path of the approaching winding unit thread guide assembly which has been moved to the outer limit of its traverse by a cam 189. The thread T<SP>1</SP> also enters between the guides and tensioners 102, 103, 104. A hook 195 connected to the arm 190 is now turned by an upstanding roller 42 on the thread guide and the thread is positioned in the two eyes of the guide. The thread from the hook 195 which was bent about a suction tube 200, slitted at 201, during motion of the arm 190 was held taut during casting off by the hook and during shifting of the thread to be engaged by a new empty bobbin. The magazine during subsequent advancement moves the thread extending between the suction pipe 187 and the slit 180a towards a cutter having a stationary lower blade 219 and a pivoted upper blade 220 moved to cut the thread by cam projections 222. The portion of thread extending from the cutter to the suction pipe 187 is then drawn away thereby. The portion of the thread between the cutter and the tube 200 is drawn into the slit 201 and held in such a way that it can move with the winding unit. The cam 44a now moves the thread guide assembly to' the base position and an empty bobbin is fed to grip the new thread T<SP>1</SP> between bobbin and chuck 24. the cutter 60 severing the thread near the chuck so that the waste piece may be sucked away through the pipe 201. The detector wire 107 is now raised to contact the thread by a cam 211 and the new wind begins. Specifications 588,718 and 672,153 are referred to.