Patent GB-190022077-A (GB)
Title: Improvements in Mechanism for Uniting the Ends of Warp-threads.
Inventor: HILLER GUSTAV
Filed: 1900-12-05
Granted: 1901-06-22
Abstract: 22,077. Hiller, G., and Berthold, R. Dec. 5. Loom warp threads, tying-in; yarns, beaming.- Relates to apparatus for uniting warp threads by twisting them together, and severing the ends beyond the twist. The warp threads 1, 2, to be united are separated from the remainder of the threads by means of hooked arms 3, 4, mounted adjustably upon a rocking-shaft 5, carried by a vertically-movable slide 6. The shaft 5 is oscillated by means of a rod connected to an arm on the shaft and actuated by a cam 10 on the main shaft N. The shaft 5 is also movable longitudinally within the slide, and during its oscillating and sliding motions the arms 3, 4 separate the threads and allow a set of separators T<1>, T', Fig. 1, to act freely. The cross-bars S<1>, over and under which the threads pass, have sharp edges and rest in shoes 27, which are pivoted to the framing and caused to oscillate by rods 30, connected to eccentrics on the main shaft N. By this means, the separation of threads lying one over another is facilitated. Jaws e, f for gripping and twisting the warp threads are provided with elastic linings, and the jaw e is rigidly secured to a rack h, while the jaw f is pivoted to a rack i ; these racks gear with a toothed wheel i<1>, mounted on a slide o. The back of the jaw f is pressed against a roller l, Fig. 5, by means of a spring k<1>. The roller l is mounted upon a lever n, which can slide horizontally on the slide o ; a flat spring normally forces the lever n downwards. A reciprocating motion is transmitted from the main shaft to the slide o, which travels in a guideway o', arranged to oscillate horizontally upon a plate s. The rack i can be intermittently coupled to the slide o by means of a spring r carried by the slide and provided with a projection r<1>, which engages with a recess r<2> in the rack ; the spring is released by a fixed stop-pin q, so as to liberate the rack i and allow it to be actuated by a spring p connecting the rack h to an arm h<3> of the rack i. When the slide o moves in the direction of the arrow I, Fig. 5, the rack i strikes a fixed stop m, and causes the toothed wheel i<1> to rotate and actuate the rack h. The spring p is stretched during the motion of the rack h, and when the slide o completes its stroke the spring r locks the rack i and slide o together. During the return stroke of the slide, the jaws e, f open, the roller l being inoperative. The ends of the threads 1, 2 to be united, before being removed from the loom or beaming-machine, are introduced between clamps K<1>, K<2>, Fig. 1, which move vertically beneath a fixed clamp K, so as to follow the upward motion of two gripping-hooks, employed for drawing the threads between the jaws e, f. As the slide o reaches the position shown in Fig. 5, the jaws are closed upon the threads by the action of the roller l, and, the spring r having been released by means of stop q, the racks, with the jaws e, f, are caused to travel, in opposite directions, by the spring p. During the twisting of the threads, thus effected, the thread ends are cut off by means of shear blades 38, 39. During the raising of the threads by the gripping-hooks, they are introduced into a curved part 58 of a wire 57, which assists the action of the hooks when drawing the threads between the jaws e, f. One of the gripping-hooks is pivoted to its shank, and during the return stroke of the slide the threads slip from it and are held by the other hook only and twisted round each other. The jaws e, f then oscillate so as to lay the finished ends of the twisted threads along the parts of the threads supported by the hook. In a modification, the jaws e,f are replaced by jaws pivoted together, like pincers, and arranged to rotate for the purpose of twisting the threads.