Patent GB-190014807-A (GB)
Title: Improvements in and relating to Looms for Weaving, partly applicable to Tapers' Beams
Inventor: WHITE WILLIAM BELL
Filed: 1900-08-18
Granted: 1901-08-10
Abstract: 14,807. White, W. B., and Stuttard, W. Aug. 18. Loom dobbies; shedding-levers; cloth beams; warp beams; stop-motions; shedding-motions.- Dobbies of the kind described in Specification No. 17,938, A.D. 1898, are provided with U-shaped lifting-wires A, E, Fig. 1, each having two hooks which engage with lifting-knives D, each having two edges. The hooked ends of the wires A, E are respectively actuated by feelers L, K and M, N, and corresponding cylinders H, J. Wedge-shaped cushions of buffalo hide Q<1> may be fitted within slots in the jack lever C' and form bearings for the lifting-wires. For the purpose of strengthening the hooked ends of the lifting-wires, the upper ends of the wires may be doubled back, and brazed ; or hooked castings, detachably connected to the upper ends of the lifting-wires, may be employed. Instead of using lifting-wires, such as wires A, E, Fig. 1, special lifting-rods, having ono or two beaks, may be employed ; each of these comprises two rods jointed together and normally held in alignment by two plate springs which extend from the joint along the sides of the upper rod. The lower rod passes through a slot in the jack lever, and carries a collar between which and the jack lever a piece of buffalo hide may be placed. For relieving the pegs of the pattern cylinders from undue strains, the feelers may be fitted with coiled or flat springs. Fig. 8<a> represents an arrangement of levers and links for actuating the griffes 27. An oscillating lever 16, connected to the tappet shaft by means of a rod 17, is formed with slots 17<a>, in which studs 18 are adjustably fitted. These studs carry antifriction rollers 19, travelling in the slotted ends 21, of two levers 23, which are connected to the griffes by links formed in two parts 24, 25. A weavers' warp or take-up beam, sand or emery roller, or tapers' beam, may comprise a longitudinally-slit metal tube 28, Fig. 9, into the ends of which are secured metal blocks 29, having slots 30 opposite the slotted portion of the tube 28 ; a strip of wood 31<a> is driven into the slots. In a modification, intermediate metal blooks may be employed, and several longitudinal slots may be formed for receiving as many strips of wood. A perforated metal strip may be wrapped upon the roller in the usual way, and be secured to the wooden strip, or strips, or a narrow strip of brass or other metal or material may be wrapped spirally round the roller, and a covering of webbing or like material may be put on to act as a cushion. Fig. 15 represents an over-motion, for looms, comprising two levers 42, 42, connected by cords 45. to the healds, and riding one above the other. The levers are returned to their normal position by means of a spring 46 connected to the left-hand lever 42 by a strap or cord 47, which is secured to an eccentric 48. A similar arrangement may be applied as an under-motion. A means for ensuring the stoppage of the card cylinders of change-box motions when the weft breaks is represented in Fig. 17. The usual trigger or tumbler 50 is made wedge-shaped, and the slide lever 51 is correspondingly inclined. When the weft-fork hammer actuates the slide lever 51 in the usual way, the tumbler 50 falls along the inclined face of the slide lever 51, and causes the shaft 54 to oscillate by means of the usual arm 58 ; by means of the shaft 54 the catches are disengaged from the ratchet-wheels of the card cylinders. The Provisional Specification describes means for saving pattern cards in circular-box looms.