Patent GB-551476-A (GB)
Title: Improvements in yarn winding devices
IPC: D01H1/38
Filed: 1941-08-21
Abstract: 551,476. Spinning frames; winding bobbins. BRITISH CELANESE, Ltd. Aug. 21, 1941, No. 10657. Convention date, Aug. 21, 1940. [Classes 120 (ii) and 120 (iii)] A yarn winding device for winding a transfer tail on an extension of a flanged bobbin comprises means for holding and driving the bobbin and a guide movable beyond the flange of the bobbin and adapted to carry the yarn over the edge of the flange so as to bring the yarn into contact with the extension and cause a small amount to be wound thereon to form the transfer tail. As shown in Figs. 1 and 2 the device comprises a ring and traveller frame and the bobbin has a short extension 28 with a beaded edge 29 below the flange 26 which has a radial slot 27 and the ring holder 23 has pins 31 engaging helical slots in curved upright members 33 secured to the ring rail 37. When a transfer tail is to be wound, the ring rail is moved to the bottom of its traverse and a lever 30 on the ring holder is moved manually, semi, or wholly automatically, to rotate the ring and lower it so that the yarn 20, which passes from the supply through the traveller 21 and has been wound on the barrel of the bobbin for several turns, is guided downwards through the slot 27 and becomes wound on the extension 28; the extent of the downward movement of the ring may be controlled by a screw 39. When several turns have been wound on the extension, the lever 30 is released and a spring 34 restores the ring to its normal winding position. In another arrangement, Figs. 6 and 7, a groove 45 in the extension below the slotted bobbin flange 26 is normally shielded by a flanged ring 46 pressed upwards against the flange by springs and the yarn 20 from the supply is taken through the traveller 21 and around fixed wire guides 40 to a notched guide 41 fixed to the ring holder 23. A forked yarn guide 51, 52 is attached to a collar 55 rotatably mounted on a sleeve 56 having a collar 57 and a bayonet slot 58 engaging a pin 60 projecting from a fixed stud 59 on which the sleeve is rotatably mounted; a slot in the collar 55 engages a pin projecting from the sleeve 56 and a bent arm 62 attached to the collar 57 carries a rotatable flanged roller 63. The yarn guide is normally maintained in an inoperative position with the pin 60 at the top of the bayonet slot 58, by a spring 64 but when a transfer tail is to be wound, the guide is moved by a lever 54 so that the flanged roller 63 is forced against the flanged ring 46 and moves it downwards against the action of its springs to expose the groove 45 while the guide 51, 52 carries the yarn into the slot 27 of the bobbin flange, the rotation of the bobbin causing the yarn to be severed in the notched guide 41 and the length of yarn from the guide 41 to a loop 53 in the yarn guide to become wound in the groove 45 while the upper tine 51 of the guide guides the yarn above the flange 26 so that it winds on the barrel of the bobbin; release of the lever 54 disengages the pin 60 from the bottom of the bayonet slot, the assembly on the stud 59 then dropping to the inoperative position and the shield 46 moving to shield the groove 45 and secure the transfer tail therein. In a further arrangement, Figs. 10 and 11, the bobbin flange 26 has a radial or tangential slot 27 leading to a bent wire hook 119 sunk in a shallow slot in the extension 28 below the flange and the yarn from the supply is threaded through the traveller and around a forked guide 67 adjustably mounted in a support 68 adjustably fixed to a sleeve 70 journalled a stud 71 and carrying a notched collar 72 and a cam 73 engaging a roller 74 rotatably mounted in a bracket 76 ; the sleeve is normally held in its lowest position on the stud 71 against the actions of a spring 77 tending to turn it by a pivoted trigger 80 engaging the notched collar 72 and a spring 83. When it is desired to wind a transfer tail, the bobbin is stopped, with the ring rail above the centre of its downward traverse, by actuating a lever 93 which applies a brake 90 to the spindle, the downward motion of the rail causing a trip 87 thereon to engage the trigger 80 and release the collar 72 and the spring 77 causing the sleeve 70 to turn and rise so that the yarn in the guide 67 is brought into engagement with the stationary bobbin; continued downward movement of the rail causes a rod 111 depending therefrom to engage a trigger 105 which releases the brake lever 93 and allows a spring 101 to take the brake off the spindle. As the spindle rotates, the wire hook 119 on the bobbin moves past the guide 67 and catches the yarn, which is kept from contacting with the bobbin flange 26 by a wire ring 122 supported by a bracket 123 and is pulled by the. hook past the lower sharpened fork 67b of the guide 67 where the loose end is severed; the yarn is guided by the ring 122 and becomes wrapped on the bobbin below the flange 26 and eventually is pulled through a gap in the ring 122 to slip through to the slot 27 on the flange 26 and become wound in the usual manner on the bobbin.