Improvements in Circular Looms for Weaving.

Abstract

17,530. Evenden, R. E., and Butt, G. W. Aug. 11. Circular looms. -The framework comprises a base a, and standards b connected by braces c, which may project from a central boss surrounding the vertical driving-shaft d. The shaft d may be driven directly or indirectly as indicated at h, and in addition may be operated by hand-mechanism. Warp beams j are arranged round the frame, and the warps pass, on their way to a circular rail k, round a curved rail l, of which the contour varies from that of the rail k in such a manner that the length and tension of all the warps will be uniform. Hooks or eyes may be used instead of the rail l. The lay m is divided into a number of segments, say four, and each segment is provided with a series of reed sections n. The segments of the lay are arranged to be operated in pairs, by means of connecting-rods attached to pivoted levers which are oscillated by a grooved cam p on the shaft d, the motion of the segments being controlled by guides w. The healds 1 are connected by links and hooks to blocks 7, 8, which slide on radial arms 9, 10 and are engaged and operated by cam-grooves formed on the upper and lower faces of a cam 2 on the shaft d. The outer ends of the healds are connected to straps passing over pulleys mounted on bars, which are arranged to slide on guides and are held in their outer positions by locking-levers. When these levers are raised, the bars move inwards to allow all the warps at one part to be moved to the inner shed plane by a wire attached to the bars to allow the cops in the shuttles to be renewed. The shuttles o, Fig. 7, of which there may be two or more, carry one or more cops or bobbins mounted upon pins and kept thereon by a hinged catch. The yarns on the cops are connected, so that when one is used the next will continue the supply. The shuttles travel upon fixed guides 39, Fig. 1, which, when a lay segment is in its lowest position, project between the outer parts of the reed sections n. Each guide 39 has a projecting part 40, which co-acts with corresponding grooves in the shuttles. The shuttles are driven by depressions formed in the warp sheds by discs 34, mounted upon vertical shafts 33 carried by arms 26 on the shaft d. The discs 34 are rotated by bevel gearing from shafts 27, which are also carried by the arms 26 and are rotated by means of pinions 28 gearing with a fixed circular rack. The discs are provided with teeth, which project between the warps and prevent sticking or lateral displacement of the warps. The shuttles carry small rollers between which the discs 34 work. Above the lay is located an adjustable former 47, over which the cloth is drawn to convert its tubular form into that in which it is to be rolled upon the cloth beam or beams 49, which are driven by bevel gearing from the shaft d. The fabric may be divided by means of knives located at the corners of the former 47. The knives are incapable of vertical movement, but are free to swing laterally, and may be reciprocated, whereby very clean cutting of the wefts is obtained. The fabric may be cut near the weaving-point, in which case suitable temple rolls are employed. When it is desired to produce loosely-woven fabrics, the lay is dispensed with, and the wefts are laid close to the fell by guides carried by the shuttles. The loom may be constructed to weave the cloth downwards.

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