Patent GB-191517518-A (GB)
Title: Improvements in Apparatus for Knotting or Joining the Ends of Yarn or Thread.
Inventor: COVENTRY WALTER
IPC: B65H69/04
Filed: 1915-12-15
Abstract: 17,518. Coventry, W., [Coulter, A.]. Dec. 15. Tying or knotting.-In a hand-operated tool for tying weaver's knots, the working parts are all mounted on a handle 25 of channel cross-section and shaped as shown in Fig. 1, and comprise three plates 1, 2, 3, Figs. 15 and 16, riveted together and secured to the handle as by brackets 4, 16, the outer plates being cut away as shown in Fig. 16, aud the interme liate plate having an aperture 32 and quadrant slot and all three formed with a projection 40. On the sides of the plate 3 and rigidly secured together through the aperture 32 are disks 9, Fig. 10, carrying books 21 slidingly held in a diametrical slot by springs 42, the hook and spring on the forward side of the machine being formed with cutting-edges. A rock-shaft 20 also connects the two disks, passing through the quadrant slot and having two slotted arms engaging pins on the shanks of the hooks and a toothed sector 23, by which it is rocked. One of the disks also carries a bracket 24, as shown. The plates 1, 2 are extended as shown in Fig. 16, and carry two sliding rods 5, 14 with projecting pins 13 and racks engaging pinions, which are mounted on a stud 7 and carry respectively wings 32, 33, Figs. 20, 21 and 22, provided with thread clips e, e', f, f<1>. The wing 33 is also provided with a latch a, a lever b attached to the spring, a link c, and an operating lever 8. Between the disks 9 and wings 32, 33, two bills 43, Fig. 24, are secured to the plates 1, 2, and between them is pivoted the shearing and clamping blade 45 with a slotted tail 46. The actuating-means comprises two parallel plates 29, Fig. 1, carried by a pivoted arm 26 with camslots 34 adapted to engage and operate the pins 13 on the rack-bars, a pin 38, a rack sector 39, a pin 47 for engaging the slotted end of the clamping- bill, and a tongue 10<1> for actuating the lever 8 to release the pressure on the thread end and raise the latch to remove it. The operation is as follows. One thread end is brought up from the rear of the machine, as shown in Fig. 1, into the notches a<1> on the thread-guides 49 on the plates, 1, 2 and under the hooks 21, and the other thread end is laid from the front in the clips carried by the wings 32, 33 and between the clamping-bills and the disks. The first movement of the arm 26 rocks the shaft 20 through the rack 39 and segment 23, the disks being held against rotation by the pin 38 engaging the bracket 24, thus drawing down a loop of thread over the projection 40 and severing the end. The pin 38 then strikes the forward end of the bracket 24 and rotates the disks about a quarter-revolution, throwing the thread loop over the bills and across the other thread. The wing 32 is then carried across to the other side by actuation of the rackbar 14, thus laying a loop of thread across the first thread loop. The clamping-bills open, and the wing 33 is thrown across to the other side, laying the free end of the thread in the open bills. At the end of the forward stroke of the arm, the projection 10<1> engages the lever 8 and releases the free end of the thread. On the return movement, the clamping-bills are closed to sever and secure the end of the second thread, the wings are returned to their original positions, the loop of the first thread is drawn over the bills by rotation of the disks due to contact of the pin 38 with the rear end of the bracket 24, and then the hooks are returned to their original positions by engagement of the rack 39 with the sector 23, thus releasing their hold on the first thread. Fig. 25 shows a modification to enable both threads to be laid in position from the same side of the machine. A guide-shield 50 of spear shape is fixed to each side of the handle to separate the threads. In this case, the hook over the rear side of the machine should be the shearing and clamping one.