Patent GB-894930-A (GB)
Title: Improvements relating to methods of and apparatus for supplying looms with weft yarnor thread
IPC: D03D45/34
Filed: 1958-11-25
Abstract: 894,930. Automatic weft replenishment in looms; winding machines. KRAUSE, W., ROSENKRANZ, H., KRAUSE, H., and ROSENKRANZ, D., [trading as PLUTTE, KOLCKE & CO.] Nov. 25, 1958 [Nov. 29, 1957], No. 37955/58. Classes 120(2) and 142(2) When an exhausted shuttle arrives in the shuttle box, the box is moved forward to bring a rear cell containing a full shuttle into picking position. A gripper takes the empty shuttle from the front cell and places it in an empty-shuttle magazine. The shuttle box then returns to its normal position, where it receives another full shuttle brought by a gripper from a full-shuttle magazine. Between the empty and full shuttle magazines, a winding machine winds a measured length of weft on to the weft spools without removing them from the shuttles; shuttle changing is initiated when the measured length has been consumed by the loom. Shuttle changing mechanism, Fig. 1. The shuttle box has three vertical walls 5, 3, 4 defining two cells, of which the front cell 3, 5 receives the operative shuttle and the rear cell 3, 4 contains a reserve shuttle. When shuttle changing is initiated, an electromagnet pushes the shuttlebox forward, whereupon the wall 5 drops to the horizontal position and the empty shuttle comes between jaws 11 of a gripper B. A projection 18 strikes a lever 17 to trip the jaws 11 so that they close on to the shuttle; the gripper then swings upwards about a pivot 9<SP>1</SP> until it encounters a ramp 14<SP>1</SP> which opens the jaws 11 to drop the shuttle into a magazine E. Meanwhile, forward movement of the shuttle box has brought the rear cell 3, 4 into line with the shuttle race, and a gripper C has swung to fetch another full shuttle from a magazine F. After the shuttle in the cell 3, 4 has been picked, the shuttle box returns to its normal position, and the gripper C deposits the fresh shuttle in the cell 3, 4. The weft ends of the shuttles in the magazine F are held by clamps 55 on an endless belt 56. Winding spools, Fig. 3. As each shuttle in the magazine E reaches the winding station, it is supported by a pair of escapement arms 33 and located endwise by stops 34 so that a roller 29 on the shuttle spindle 27 contacts a friction driving wheel 65. Before winding commences, the thread L from the supply extends through a guide 35 and along a guide slot 44 to a clamp 43. A wedge 45 forces apart a pair of spring-loaded discs 30 on the spindle, and a gripper 50 passes over the shuttle to engage the thread between the guide 44 and the clamp 43 and draw it out of the clamp and between the discs, which close on to it. A shaft 41 swings the thread guide 35 towards the shuttle and reciprocates it to form a cross-wound package, the duration of winding being controlled by a measuring device; when the spool is full, the thread guide 35 is swung away to the position shown. A gripper 39<SP>1</SP>, starting at the right hand end of the mechanism and moving to the left, engages the thread L<SP>1</SP> between the guide 35 and the spool and draws a loop of thread to the clamp 43, the jaws of the gripper 39<SP>1</SP> being open at this stage. The limb of the loop passing through the guide 35 enters the guide slot 44 and enters the clamp 43, which closes on it. The gripper 39<SP>1</SP> then closes, cutting the thread and holding the end leading to the spool. Finally, the gripper returns to the right to present the end of the thread to one of the clamps 55, Fig. 1, on the belt 56.