Patent GB-190607119-A (GB)
Title: Improvements in Looms for the Manufacture of Tufted or Pile Fabrics.
Filed: 1906-03-24
Granted: 1907-04-24
Abstract: 7119. Brintons, Ltd., and Greenwood, T. March 24. Looms, pile forming and cutting in; shuttleless looms ; weft-needles ; framework ; driving-mechanism ; stopping and starting mechanism; brake mechanism.-Looms of the kind described in Specifications No. 15,680, A.D. 1890, No. 11,268, A.D. 1891, No. 24,086, A.D. 1892, No. 11,397,A.D. 1894, and No. 1095, A.D. 1900, for weaving Royal Axminster or Moquette carpets or fabrics are constructed and arranged to weave much wider fabrics. The main gripper shaft 1, Fig. 2, to which the " wing shaft" and the " dividing shaft " are stayed, is prevented from sagging by being supported from the bottom frame 2 by one or more bearing-brackets 3, which are made thin to pass up between the warps 4. The upper part of each bracket is made as a bearing 5, to which a cap 6 is screwed. The base parts of the brackets are bolted to the vertical faces of upwardly-projecting brackets 10 fixed to the frame 2, so that the brackets 3 may be adjusted crosswise of the shaft 1. The bearing 5 has a flat shank 11, which is bolted to the face of the bracket 3 to admit of vertical adjustment. The heavy top beam 34, Fig. 4, which carries the vertical bars or yarn carriers and the knife-comb and travelling knives, is mounted at each end on connected rollers 35, 36, which are arranged between planed surfaces on the top beam and on end brackets fixed to the top of the loom frame. Adjustable rollers 40 are adapted to bear against the planed end surfaces of the top beam to prevent endways motion. The top beam is operated by the usual rack 54 and pinion mechanism 55, a coiled spring attached to the top beam and to a fixed bracket being employed to take up the back-lash on the rack-and-pinion gear. The motion of the top beam is limited by adjustable stop-beams 47, 48. Several sliding knives 63, 64, Fig 8, are employed for cutting the tuft yarns in conjunction with the usual cutter-teeth 56 of a long knife-comb 57 which extends across the loom, and each knife traverses a separate portion .of the comb 57. The sliding boxes 58, 59 of the knives 63, 64 ate connected to the usual operating wire rope, and are adjustably connected to each other by rods 60. These rods are adjusted in length by the use of a right and left-hand screwed connexion 65, or by one end being screwed into a socket 66. In order to prevent any springing of the knife-blade comb 57, Fig. 18, and the knife slide 114, which extend across the loom, one or more slides 122 are secured to the knife-blade comb and engage downwardly - projecting inclined guidebrackets 121 fixed to the top beam 34. The knifeblade comb is raised and lowered by levers, which are secured to an horizontal shaft and have slots engaging pins on brackets secured to the knifeblade comb. The horizontal shaft is rocked by a lever and a cam-actuated rod. The end levers 69, Fig. 10, of the comb 67, which is employed to raise the tufts when they are released by the grippers, are connected by an horizontal shaft 68. One or more stays 71 are fixed to the comb and adjustably secured to the shaft 68, so that the comb may be adjusted and held straight. If for any reason the loom has to be stopped with the grippers raised, the weight of the grippers and other parts carried by the main gripper shaft is sufficient to overcome the action of the loom brake. In order that the loom may be stopped with the grippers raised, a cam 103, Fig. 14, provided with a tooth 104 is secured to the main gripper shaft 1. A pivoted catch-lever 106 is oscillated by a cam 108 on the bottom cam-shaft 109 and by a spring 111, and its oscillation is timed so that, if the grippers are held raised for a moment too long, the tooth 104 will be caught by the end 105 of the catchlever, and the grippers will be held up while the loom is stopped. According to the Provisional Specification, in order to prevent the long weftinserting needle from sagging, it is supported in a tubular guide, which is carried by the loom frame. The guide has a longitudinal slot, in which works a side pin secured to the needle, the usual operating- cord being secured to the side pin. Instead of a tubular guide, two pieces of V-shaped or semicircular cross-section may be employed, or the needle may be supported by pairs of upper and lower guide-pulleys. The needle may be tubular and may be adapted to slidealong an horizontal guide-bar, the needle being slotted to allow the guide to project through the slot and be secured to the loom frame. The tappet-shaft is driven by worm gearing from the driving-shaft, on which are placed the usual fast and loose pulleys, a brake wheel, and a hand turning-wheel. The strap-fork bar is operated by hand-levers and connexions at both sides of the loom, and the brake strap is operated by an incline on the strap-fork bar, so as to be taken off or put on the brake wheel as the driving-band is moved to or from the fast pulley.