Patent GB-677552-A (GB)
Title: Improvements in or relating to thread winding apparatus
IPC: B65H54/50
Filed: 1949-10-26
Abstract: 677,552. Winding thread. BUREAU, R. O. P., and ALRIC, G. C: A. Oct. 26, 1949 [Dec. 6, 1948], No. 27523/49. Class 120(ii) Thread winding apparatus of the type in which a cone of thread is rotated by contact with a driving roll having two helicoidal grooves, adapted to direct the thread from the middle of the cone towards the ends thereof, and in which means is included for reciprocating a guiding rod or rods, adapted to direct the thread from the ends of the cone towards the middle thereof, is characterized in that the average pitch of one of the grooves differs from that of the other. The driving roll 5 which serves, in part, as the thread guide, is formed from two concentric cylinders 5a, 5b and end cheeks 5c, 5d, the space between being filled with plaster 5e into which the thread-guiding parthelices 7a, 7b, of differing pitch, are cut. The helices 7a, 7b operate only to move the thread being wound from the centre of the package towards the respective ends, the motion of the thread from the ends of the package towards the cutter being brought about by dogs 9a, 9b reciprocated with a rod 8 moved by a cam or a crank disc and short connecting rod. In a modi-. fication, not shown, the dogs 9a, 9b may be moved separately of each other by cam or crank mechanism. The thread 4 from the supply package 13 is led through a plate 17, formed with a vertical clearing slit 18, which also serves to modify the balloon to a form having as its vertical cross-section an ellipse. It then passes between two discs 16a, 16b, the disc 16b being spring-urged towards the disc 16a by a push-rod 22 and lever 20, operated by members 28, 29 controlled by the arm 66 carrying the package being wound so that the tension imposed on the yarn 4 decreases as the package grows. At the same time, a pusher rod 30 operated by a rod 33 moving in synchronizm with the thread guide rod 8, moves to contact the lever 20 so that the tension on the yarn is relieved, each traverse, as it approaches the larger end of the package being wound. The thread is waxed at 34 and then passes under a rod 35 which operates the stop mechanism. A shaped plate 38, 39 facilitates the traverse of the thread towards each end of the package and also assists in the return of the yarn by the dogs 9a, 9b. Two substantially vertical overlapping plates 46, 47 (not shown), with obliquely formed top edges, may be fitted in front of the rod 8 to protect the operator's hands when piecing up. The package being wound is carried by a cone placed over a " dead " shaft 53 pivotally supported by an arm 56 attached to a member 66 pivotally carried by a shaft 67 and counter-weighted at 69. The shaft 53 rotatably carries a sleeve 50 fitted with spring-urged sliding members 57, 62, the member 57 being coned and the member 62, preferably of rubber, being carried by conical chuck 61 governed by a shaped collar 64. The amount of overlap of the package-carrying cone is determined by a stop 65. As the package grows and the member 66 moves about its shaft 67, a rack 74 attached to the member 66 moves past a pawl 73 carried by a spring- urged member 72 pivotally mounted on a shaft 71 supported in parallel relationship to the shaft 67. Also carried by the shaft 71 is also pivoted upon the shaft 88. Upon which is an oscillatory power-driven lever 86. Adjacent the member 72 and pivoted upon a shaft 88, fixed to the machine frame, is a spring-urged member 87 carrying a springy tongue 91 (not shown). A spring- urged finger 94 co-operating with the shaft 71 is an L-shaped member 81 adjacent breakage of the thread, the rod 35 is released thus allowing a spring 97 to tip the member 81 within the path of the lever 86 and so lift the member 72 and thus the rack 74 to remove the package from the roll 5. During this motion a pin on the member 72 comes to bear against the tongue 91 (not shown) of the member 87 to lock the pawl 73 in the rack 74. At the same time, the raising of the shaft allows the spring-urged finger 94 to move beneath a " flat " on the shaft to maintain the system " locked " and keep the package in its raised position. Upon the downward motion of the oscillatory lever 86, the member 81 tilts forwardly under the spring 97 and allows the member 81 to move backwards. Upon piecing-up, the operator presses the lever 89 to tip the member 87 forwards so disengaging the tongue 91 (not shown) from the pin in the member 72 to allow the same to pivot and remove the pawl 73 from the rack 74; also, the finger 94 is withdrawn from the shaft 71 and the package moves back on to the roll 5. When the package has reached a diameter of predetermined size, obtained by adjusting the rack 74 on the member 66, the rack 74 will move beyond the position of the pawl 73 and the member 72 is turned by a torsion spring so that an abutment 80 moves the member 81 into the path of the lever 86 to effect separation of the package from the roll 5.