GB114160A - Improvements in or relating to Circular or like Weaving Looms. - Google Patents

Abstract

114,160. Crespi, S. B. March 12, 1917. [Convention date]. Circular looms.-In a loom having one or more magnetically-driven shuttles running in an endless path, the shuttles run on a fixed circular reed and each has a weft-guide which inserts the weft between the warps and presses it home, thus obviating the use of a beating-up reed. The warps are drawn positively or otherwise from beams 2, Fig. 3, arranged around the bottom of a frame 1, and pass through a stationary circular guide-reed 25 and a similar reed 18 on which the shuttles travel. Within and above the reed 18 are inclined circular guards 16, 17 of non-magnetic metal and arranged as shown, and metal sheets 19 extend upwards from the guard 17 and gradually pass from a circular to a polygonal form in cross-section, the cloth passing up over the sheets 19 to the take-up rollers 20 and being cut longitudinally by razor blades &c. into a predetermined number of longitudinal pieces during its travel. Each shuttle 26, Fig. 4, is of metal, is curved in plan, and contains a cop 21, from which the weft passes to the front and thence to a projecting channelled blade 22, which serves to guide the weft and press it home at the fell. The shuttles are drawn around the reed 18 by the attraction of electro-magnets 6 mounted on a rack ring 5 free to revolve on rollers or balls in an annular box 11. The rack 13 on the ring is engaged by a toothed wheel 12 on a shaft 4 driven from an electromotor 3, or a belt pulley &c. Electric current is supplied to the magnets through brushes 14 and contact rings 15. A vertical shaft 7 is driven by bevel-gearing from the shaft 4 and drives a take-up motion for each longitudinal piece through worm and chain gearing. The healds 9 are stretched between curved frames arranged in a circle and are actuated through ropes by ecentrics 8 on the shaft 7 and by pulleys and springs or weights so that a shed is opened in front of each shuttle and closed behind it, levers 23 being used to magnify or reduce the movements imparted by the eccentrics. The shedding may be arranged to produce longitudinal selvedges at the parts to be cut. According to the Specification as open to inspection under Sect. 91 (3) (a), the shuttle may otherwise be actuated by causing a magnetic flux to rotate in a stationary circular " armature " by rotating the current intake by means of a collector to which the ends of the windings are led; or the shuttle may be a sort of small locomotive with internal driving-means; also the weaving may proceed from the top downwards or horizontally. This subject-matter does not appear in the Specification as accepted.