Patent GB-346705-A (GB)
Title: Improvements in warping apparatus
IPC: D03D49/06
Filed: 1930-01-13
Abstract: 346,705. Warping and beaming yarns. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Barber-Colman Co.; River Street, Rockford, Illinois, U.S.A.) Jan. 13, 1930, No. 1166. [Class 142 (iv).] Stop-motions; guiding and tensioning yarns in other than warp form.-Yarn drawn from a series of non-rotatable yarn masses is passed through a plurality of detectors, each of which is adapted, upon breakage of its thread, to close an electric circuit, thereby operating the braking means to stop the machine, and simultaneously actuating means to move the other detectors to a position to tension the yarn threads associated therewith. Means are also provided for moving the detectors from yarn tensioning position when the warping apparatus is started. Each detector unit comprises an arm 10, Figs. 2 and 3, having a bent portion 11 by which it is supported in a bearing on a metallic member 26, which is mounted on one of the upright posts 3 of the creel frame. The pivot 11 carries a double armed member 28, 68, each arm of which is adapted to contact with a conducting bar 29 located within the upright 3 and whose upper end is connected to one pole of an electromagnet 31, Fig. 7, the other pole of the magnet being connected by a lead 32 to a switch 33. The main shaft 38 of the warper is driven from a constantly rotating pulley 39 by means of a clutch 41 and is braked bv means of a friction clutch 44, operated by oscillatory cams 42, 45 respectively, fixed on a rock shaft 43 having a segment 52 adapted to be engaged by a pivotally mounted detent 48 associated with the magnet. A crank arm 55, Fig. 8, also mounted on the shaft 43, carries a pin 56 which engages a slot in and normally supports a lever 58 having a crank arm connection 59 with a shaft 60 on which is fixedly mounted a weighted hand lever 61. The ends of the shaft 60 are connected by suitable gearing to a rock shaft 63 journalled in the creel frame and provided with arms 64, Figs. 2 and 6, which underlie the control bars 29, insulating material 65 being interposed. When a thread breaks in its passage from the creel to the warping apparatus, the corresponding detector arm 10 falls forward and allows the arm 28 to contact with the surface 29a of the bar 29, thereby energizing the magnet 31. The detent 48 is consequently withdrawn from the segment 52 and the subsequent rocking of the shaft 43 causes the cams 42, 45 respectively to stop and brake the machine. At the same time the downward movement of the crank pin 56 allows the lever 58 and the handlever 61 to drop, thereby rocking the shafts 60, 63, and the arms 64 on the latter raise the control bars 29 to bring a projection 66 thereon into engagement with the arms 68 so as to press forward the arms 10 and tension the rest of the yarn. Provision is made for releasing this tension when the machine is started. When the hand-lever 61 is raised so that it can be supported by a shoulder 70, Fig. 8, the bars 29 are moved to their lowermost position wherein the surfaces 67, Fig. 2, acting on the contact arm 28, hold the detectors in threading position. Guiding means comprising a pivotally mounted rod 7 is interposed between each vertical row of yarn masses and the corresponding series. of detectors.