Patent GB-494753-A (GB)
Title: Improvements in or relating to the manufacture of cabled yarns and threads
IPC: D01H1/00
Filed: 1937-01-28
Abstract: 494,753. Twisting and winding yarns &c. COMPTOIR DE MATERIEL TEXTILE. Jan. 28, 1937, No. 2474. Convention date, Jan. 30, 1936. [Class 120 (ii)] An assembly of doubled and twisted yarns is made by separately and simultaneously doubling and twisting a number of assemblies of non-twisted yarns substantially identical with one another, each such assembly being arranged on a bobbin in a twisting and doubling spindle and the rotary speeds of all the spindles being substantially equal; the linear delivery speeds of all the assemblies to their spindles are equal and proportional to the common rotary speed of the spindles and the linear speeds at which the twisted yarns are drawn off outside the spindles are equal and proportional to the delivery speeds so that each assembly of non- twisted yarns is doubled and twisted under substantially the same conditions of twist and tension, and the doubled and twisted yarns being then assembled side by side. The assembly of doubled and twisted yarns arranged side by side may be immediately wound upon a bobbin by a device in which the length of the part of the assembly situated between the last fixed guiding point and the point at which it is traversed along the bobbin is kept constant ; the bobbin of doubled and twisted yarns may then be arranged inside a spindle with delivery and drawing-off arrangements as described above to form a cabled yarn or thread. As shown in Figs. la and 2a three assemblies a, b, c of non-twisted yarns are supplied in bobbins loosely mounted on spindles 14 on stirrups 10 mounted on aligned hollow spindles 6, 7. The whole of the spindles 6, 7 are driven synchronously by chains and sprockets from a shaft 2 and the yarn from each bobbin is drawn therefrom by a pair of rollers 28, 29, the rollers 28 being driven by worm and toothed gearing from the shafts 6. The yarn from each of the pairs of rollers 28, 29 passes through the spindle 6 to a guide 17 on a plate 11 secured to the spindle, then to a guide 18 or a similar plate 12 secured to the spindle 7 and through the spindle 7 to rollers 52, Fig. 1b, which are also driven synchronously from the shaft 2. Each doubled and twisted yarn a<1>, b<1>, c<1> passes several times around the roller 52 and a grooved pulley 53 and is conducted to a common thread guide 58 from which the assembly a<1>b<1>c<1> of doubled and twisted yarns are drawn by a driven roller 59 and a loose roller 60, the roller 59 and the rollers 52 being driven from the shaft 2 through change gearing which can be varied according to the nature of the yarns or threads being made. The assembly a<1>b<1>c<1> passes from the rollers 59, 60 to a fixed guide 67, thence to a guide 68 on a block 69 slidable in a track 70, Fig. 5, and then to the traverse guide 71 reciprocated in the track 70 by a cam 75 to wind the assembly on a bobbin 85 fixed on a shaft 86 rotating in a bearing 87. The guides 67, 68, 71 are connected by a wire 92 running parallel to the path of the yarn assembly and the block 69 is connected to a weighted cord 96 passing over a pulley 97 at the end of the track 70 so that a constant length of yarn is maintained between the guides 67, 71 and the internal tensions in each of the twisted yarns of the assembly is maintained constant. The bobbin 85 is driven by a knurled roller 88 carried in pivoted arms 91 and driven by a belt 89 from the shaft 44 of the roller 59. The cam 75 is driven by a chain 77 from the shaft 44 and the chain is tensioned by a roller 99 adjustable in a slot 101 in the bearing 87. The bobbin 85 is finally introduced into a machine provided with a doubling and twisting spindle and positively driven delivery and draw-off mechanisms as above and the yarn assembly formed into a cabled yarn or thread. The doubling and twisting spindles may be provided with stop motions as described in Specifications 331,702 [Class 120 (ii)], or 406,801.