Patent GB-190711540-A (GB)
Title: Improvements in and relating to Shuttleless Looms for Weaving.
Inventor: SMITH EDWARD
Filed: 1907-05-17
Granted: 1908-03-19
Abstract: 11,540. Smith, E. May 17. Selvedges.-Fabrics are woven in a shuttleless loom in such a manner that fast selvedges are formed. A weft-carrier engages the weft W, Fig. 40, extending from an outside supply to the selvedge 10, and draws it in looped form through the shed. When the carrier has reached a predetermined point, the weft is cut at the point X, and the part W<1*> is drawn out of the shed, leaving the part W' within the shed. The latter part is then beaten up together with the short part W‹, the shed is changed, and the carrier returns, inserting the part W<1*>, which is thereupon beaten up. The ends of the parts W<1*>, W* are forced downwards through the warps, where they may be readily removed. Shuttleless looms; weft, cutting; forming selvedges. -A loom for weaving the fabrics described above has its ordinary parts of the usual construction, and the weft-carrier is picked like an ordinary shuttle. The weft pass s from a conical or other supply mounted on the loom frame, through a funnel, between brushes or other tension devices, and through a slotted guide provided with tufts of yarn to a conduit 6, Fig. 6, attached to the lay. Fr.,m the conduit, the weft passes through an opening 8 in a weft-gripper bracket, under a depresser-bar 11, and forward to the temple frame or other part, to which it is secured when the weaving is commenced. The weft passes under the foot of a pivoted gripper 9, which is operated to grip and release the weft at desired intervals. When the carrier 12, Fig. 31, is picked, a projection 17 thereon engages the weft and carries it in looped form through the shed. When the carrier has passed partly through the shed, a projection 18 upon it engages an arm on a rockshaft 16, Fig. 11, which extends along in front of and is carried by the lay. The shaft 16 is rocked, and an arm 20, Fig. 6, upon it is raised and strikes an arm 9<A> of the gripper 9, which is moved into the position shown to grip the weft. At the same time, a knife 21, Fig. 11, which is pivoted to an arm 21<A> on the sbaft 16 and is controlled by a spring S, is depressed through the warps near the selvedge 10, Fig. 35, and the cutting-edge 21<C> of the blade severs the weft at the point X. An angular plate 21<B>, Fig. 11, holds the weft while it is being cut, and then forces the extreme end of the part W<O> to the underside of the fabric. The knife 21 normally extends through the warps, but when the lay moves forwards at the beat-up the knife rides over the temple-cover 26 and a guide-plate 27 and is thereby raised above the warps. As the carrier enters the box 14, Fig. 35, the part W<1*> of the weft is drawn clear of the shed, and a brush 22 lays this part of the weft under the cover-plate of the carrier. When the carrier is picked from the box 14 after the part W<1> of the weft has been beaten up; the part W<*> is drawn into a slit at the end of the carrier opposite the projection 17 and passes out from the bottom of the slit, tension being put on the weft by its passing over a brush 25 mounted in the carrier below the cover-plate. A two-armed lever is mounted on the shaft 16, and when the shaft is rocked by the projection 18 while the carrier is passing from left to right, the rear end of the lever is raised from between a plate and a lower adjustable blade-spring carried by the lay and moved between the plate and a similar upper blade-spring, so that the shaft 16 is held in the position to which it is rocked. When the weft W<1> is beaten up, the front end of the two armed lever is raised by a curved spring-plate on the breast beam, and the shaft 16 is returned to its initial position, the weft being thereby released by the arm 20 acting on a projection 9<B> on the gripper. As the weftcarrier is returned across the loom, the shaft 16 is again rocked, but the knife 21 makes an idle movement as there is no weft under it. The sha't 16 is returned as the weft W<1*> is beaten up. In order to retain the carrier in its path, a narrow guide-bar is secured to arms pivoted on brackets on the handrail of the Jay, and extends across the loom in contact with the upper shed of the warps. The pivoted arms are held in position against the action of a spring by a notched lever, and when the lever is raised the bar is moved upwards and forwards by the spring to allow the carrier to be removed. Additional support is given to the shaft 16 by journals secured to the brackets on the handrail. In order to force the ends of the wefts W<1*> to the underside of the fabric, a thread which is not woven into the fabric passes from a spool at the back of the loom, through an eye in a vertical wire, which is moved up and down by a spring and a cam-actuated lever, and is wound on to the cloth beam. The thread is pulled down after the carrier has passed under it laying the weft WI* in the shed, so that the thread engages the end of the weft and forces it down between the warps close to the selvedge. The weft ends are retained on the underside of the fabric by a narrow metal tape, which is attached at its rear end to a spiral spring and at its front end to the temple frame or other part, so that it lies under and in contact with the lower shed of the warps and the fabric close to the selvedge.