Patent GB-245530-A (GB)
Title: Improvements relating to warp heddling machines
IPC: D03J1/14
Filed: 1924-10-11
Abstract: 245,530. Marks, E. C. R., (Zellweger Akt.-Ges.). Oct. 11, 1924. Healds, threading. - In a jacquard-controlled warp-heddling machine having devices for separating the healds of each harness, each separating- device is provided with a feeder adapted to separate a group of healds and to transport them to a. place from which a gripping-device supplies them singly to a second place, where they are presented to members which move towards them and hold them in position during the passage of the threading-needle, each threaded heald being displaced laterally by abutment means rigidly fixed to the needle. After each threading-operation, the needle and the abutment means are withdrawn and are then returned to their initial position. The invention is described in its application to a machine for threading six harnesses 3, Fig. 5. The threading-needle 51 and two spindles 49, 50 for deflecting the threaded heald are mounted on a cam-operated bar 48 movable towards and from a support 46 carrying a spindle 52 between the needle and the spindle 50. The support 46 is mounted on the continuously-reciprocated front part 10 of a carriage 10, 11, the front part 11 of which is provided with a support 62 carrying a horizontal bar 63 to which is pivoted a cam-operated separating member 67 integral with an open-side funnel 66, Fig. 16, having guide-members 77 for the healds. In the operation of the threading-device, the two parts of the carriage 10, 11 are initially to the right of the position shown in Fig. 5 and are coupled to one another. Upon the forward motion of the carriage, the part 11 remains coupled to the part 10 and partakes of its motion until a jacquard-operated pin uncouples the parts 10. 11, the part 11 being held in a position corresponding to the particular harness 3 to be operated on. Upon further motion of the part 10, the separating-member 67 is raised into the position shown and, by means of the members 77, guides the heald B to the neck of the funnel 66, which serves to guide and position the needle. A cam-operated lever 74 then engages the eye of the heald, which has been selected from the healds of the particular harness by mechanism described below, and moves it from the full-line position to that shown in dotted lines in Fig. 16. The needle 51 and the members 49, 50 then advance further and the needle is threaded, the cam 74 releases the heald, the separating device 67 and funnel 66 are lowered, and the members 49, 50 deflect the threaded heald. If no heald is present, the machine is stopped by an electric stop-motion. The parts are then withdrawn from the harnesses and are returned to their normal positions. A plate 64 is provided on the bar 63 for deflecting healds away from the one to be threaded when a heald in one of the harnesses 3 shown to the left in Fig. 5 is being dealt with. Upon the completion of the movement of the carriage to its normal position, a hook 85 on a bell-crank lever moves downwardly to withdraw the warp thread from the hook of the needle 51. Healds, separating into groups and feeding individually therefrom.-To each harness of healds to be threaded there is provided a device for engaging a number of the unthreaded healds B, Fig. 23, and transferring them to a position B, Fig. 26, where they are retained by a locking-lever 103, and from whence they are carried singly by gripping-devices to a position 134 for engagement by means described above during the threading operation. The feeder 126 is pivoted on a lever 120 jointed to a slide 119 which is positively moved to the left in a lever 109 upon indication by jacquard mechanism, return motion being effected by a spring. When the feeder moves to the right, a beak on the lever moves along an incline on a spring-controlled switch 122, and after passing the end of the switch, allows the feeder 126 to move into the position shown in Fig, 23 and intercept four healds B. When the feeder moves to the left, into the position shown in Fig. 26, the intercepted healds are held by a spring- controlled locking lever 103, Fig. 23, on a fixed part of the machine. When the slide 119 again moves to the right, the intercepted healds B are engaged by a spring-controlled lever 130. Fig. 27, which is thereby turned and releases a spring- controlled lever 31, the first of the intercepted healds being thus secured between a notch in the slide 119 and a claw of the lever 131. The presence of the intercepted healds prevents further movement of the slide to the right. When the slide 119 again moves to the left, the selected heald, which is held between the lever 131 and the notch in the slide 119, is moved past a spring 107, Fig. 23, and brought into the threading position 134, an inclined surface 112 on the lever 109 turning the lever 131 and thereby releasing the heald, which is held against a locking-lever 104. Upon further movement of the slide. an inclined surface 114<1> on a part connected to the slide engages a roller 113 to turn the lever 109 into the position shown in Fig. 26, thus withdrawing the heald-holding members 119, 131 out of the path of the threading means. Further reciprocations of the slide transfer healds singly from the separated group of healds to the threading position, the slide only making a full stroke to the right when there are not enough separated healds to offer effective resistance to its full motion.