Patent GB-190114760-A (GB)
Title: Improvements in and relating to the Manufacture of Yarn, Thread, Twine and the like.
Inventor: SAWYER FREDERICK WENTWORTH
Filed: 1901-07-19
Granted: 1902-07-17
Abstract: 14,760. Lake, H. H., [Sawyer, F. W.]. July 19. Machines for making twine.- In the spinning or twisting of yarn, thread, twine, &c., the material is passed from the drawing- rollers 3 to a guide 7, which i s traversed vertically within a rapidlyrevolving chamber 5, whereby the length of yarn 40 between the guide and the inner surface of the chamber is carried round so as to twist the fibre which is simul taneously wound on the inner surface of the chamber. For the purpose of removing the yarn from the chamber &c., a bobbin 16 is inserted therein from below when the guide 7 is in its highest position, and a notch or projection 17 on the bobbin engages with the yarn, whereby, the delivery of the yarn being stopped and the chamber 5 continuing to rotate, the yarn is wound from the inside of this chamber or to the bobbin 16 as shown in Fig. 17. The bobbins 16 are then lowered out of the chambers 5 and tilted forward to facilitate doffing, the bobbin rail 12 being suitably pivoted, and the lower end of the chamber 5 being provided with a spring catch 51 for holding and severing the thread. In order to provide a sufficient length of yarn between the drawing- rollers and the bobbins to allow the latter to be lowered from the chambers 5, the yarn passes through a notch or guide in one side of a roller 30. and just before the doffing-operation the roller is raised from the position shown in Fig. 18 to that shown in Fig. 17 and simultaneously rotated so as to wind a length of yarn thereon, which is given out again as the roller and bobbins descend after the winding operation. The chamber 5 is flanged at its upper part and is supported in a casing 52, which is provided with connections with an aircompressing apparatus, so that a cushion of air can be maintained between the opposing flanges of the chamber and casing and also between their vertical walls. This air-cushioning arrangement may also be applied for supporting the loose rings of ring and traveller frames. The chamber 5 is provided with a neck 50 engaged by the driving- band which passes from one end of the frame to the other, the casings 52 being carried by spring levers whereby the necks 50 are rormally held against the driving-band. Suitable levers and cams operated by handles are provided for with. drawing any individual casing from the driving- band and applying the neck 50 against a brake. On its passage to the rollers 3, the material passes through a guide 83 carried by a spring lever, which is normally held in the position shown by the catch 86 on the armature of an electromagnet 87. Between the rollers and the chamber 5 the yarn is pressed against by a light pivoted presser, which, when the yarn breaks, moves in contact with the guide carrier 70 and so energizes the magnets, whereby the guide 83 and also a " licking " roller 82 are moved into the dotted positions shown in Fig. 29. The spring lever of the guide 83 carries a sliding bolt 95, whereby, as the guide is moved into its upper position, the roving is clamped in the guide and severed between it and the rollers. The roving is automatically released as the guide is moved downwards. This "licking" roller 82 is carried by arms 88, 89 from the spring guide lever so that it is moved into the extreme positions shown with the movements of the guide. A suitable traverse mechanism is described for properly winding the yarn in the interior of the chamber 5, the extent of the traverse being uniform throughout the winding operation but gradually shifted lengthwise at each reciprocation of the lifting lever. Automatic mechanism is also described for performing at the proper times the several operations required, the mechanism being actuated from a cam shaft which is brought into gear by the traverse mechanism on the completion of the winding within the chamber 5.