Patent GB-190824407-A (GB)
Title: Improved Method of and Means for Twisting and Cabling Yarns.
Inventor: WHYTE JOHN DEMPSTER
Filed: 1908-11-13
Granted: 1909-11-04
Abstract: 24,407. Whyte, J. D. Nov. 13. Delivery, stopping; spindle apparatus spinning, doubling, and twisting machines with twisting- arrangements at delivery; stop motions; tension arrangements. - In a machine for performing simultaneously the twisting of two-fold threads and the cabling together of several of such twisted two-folds, the doubled yarns are drawn from large cops contained in tubes d, Fig. 2, secured to spindles b which are driven from wharls f, each tube having a tension device consisting of a removable conical cap d' held to the tube by pins and bayonet-slots. The yarn passes through a loop h inside the cap and around any number of tension fingers h<1> to the eye h<2> in the spindle axis, through the drawing-off rollers i and over rollers j to a pulley j<1>, where the several twisted two-folds are combined, and then through delivery rollers i<1>, Fig. 1, to the spindle c, arranged alongside the delivery spindles b, where the twofolds are twisted together. A modification of the tension device, Fig. 4, consists of a plate d<4>, having a central perforation d<5> and tension fingers d<7>, the plate being held on the tube by a hinged wire e<2> which extends across the tube and is bent downwards at e<6>, then upwards to the centre of the plate and into an eye d<6> in the spindle axis, the portion e<6> snapping into a recess in the tube. The yarn passes through the hole d<5> and around the tension fingers d7, into a notch d<8> in the tube flange, around the tube underneath the flange to another notch and then to the eye d<6>. A number of notches d<8> may be provided so that the yarn may be wound more or less around the tube. Before passing through the delivery rollers, each twisted two-fold may be kept at the same tension by passing through a fixed eye to an eye on a block capable of sliding on a vertical rod and controlled by adjustable weights so that the tension may be varied as required, or, according to the Provisional Specification, suitably-weighted levers hanging on the two-folds may be used for this purpose. Anordinary drop-wire box n, Fig. 6, is arranged to serve each group of spindles, consisting in this case of three delivery spindles and one cabling-spindle. The box has a wire o for each spindle, so that if a thread breaks, the counterweighted lever p, bearing against the thread and pivoted at p<1> to a stand r, swings downwards and its drop-wire o comes into the path of the rotating wiper r<1>, which tilts the wire o and the box n. This actuates the pivoted lever t<1> to remove a projection t<2> from the lever u, loosely mounted on the shaft t<4> and normally supporting the four levers t<5> by a rod u<2>. The levers t<5> carry forks u<1> embracing the driving-cords of the spindles. When a thread breaks, the levers u, t<5> fall, the driving-cords are shifted on to the loose wharls v, and brakes v<1> are applied to the tubes. When the lever u is lifted by hand all four levers t<5> are lifted by the, bar u<2> and the driving-cords are shifted on to the fast wharlsf while a spring or a load returns the pivoted lever t<1> to secure the lever u. Each of the levers t<5> may have a light rod attached to it whereby any one lever may be lifted independently for the purpose of putting some twist into a newly-pieced thread before restarting the four spindles. Each top roller i rests in a gap x in the fixed bracket y and the tilting of the drop-wire box is arranged to lift the front part of a frame w pivoted on a rod w<1> and provided with noses w<3> which push the roller backwards in the gap x and so remove the top roller from driving contact with the lower roller. The pivoted lever p may be arranged in front of the rollers, a part behind the pivot carrying the drop-wire. The drop-wires may be raised, when re-starting the spindles, by depressing a pivoted lever carrying a bar which runs the length of the drop-wire box and has fingers to operate wires engaging with bent-out parts of the drop wires. According to the Provisional Specification, the stop-motion may be arranged to lower carrier-pulleys for the spindle cords instead of actuating the forked levers.