Patent GB-144272-A (GB)
Title: Improvements in power looms
IPC: D03D39/02
Filed: 1920-05-31
Abstract: 144,272. Lambert, E., and Pernin, R. May 31, 1919, [Convention date]. Pile fabric looms; goods of exceptional character, l o o m s specially designed for. - In a loom for inserting a series of non- continuous threads into a fabric in the direction of the warp during weaving, lengths of coloured threads projecting from spools 195, Figs. 1, 9, and 10, are grasped by a gripping- device 60, 61 carried by the plates 81, 82 of a distributing- device, short lengths of thread are then cut off by means of a traversing and rotating cutting- wheel 127 acting in conjunction with a cutting-blade 129, which is oscillated by cam-controlled lever-mechanism into and out of operative position, and then the gripping-device moves the threads to a position adjacent to the fell of the fabric being woven, the threads being then inserted in the fabric. The plates 81, 82 carry two gripping-devices 60, 61, one of which receives threads from the spools white the threads held by the other gripping-device are being woven in the fabric, the plates 81, 82 being carried by a shaft 34, which is given successive semi-rotations, with a short pause between each movement, to carry the gripping-devices successively from the threadreceiving to the thread-inserting positions, the threads being received from the spools and inserted in the fabric during the pauses. The plates 81, 82 also carry two toothed inserting-rods 165<1> and two grooved guide-rods 178<1>, so that there is one inserting-rod 165<1> and a guide-rod 178<1> at a position adjacent to the fell at each pause, these upper rods acting in conjunction with similar lower rods 178, 165 carried by the loom frame. The guide-rods 178, 178<1> have each two series of grooves to receive the warp threads of the fabric being woven as shown in Figs. 19 and 22, and the teeth 184 of the inserting-rods correspond with these grooves. The upper inserting-rod 165<1> is first rocked so that its teeth 184 move the threads held by the gripping-device which is in the inserting position into the grooves 183 of the lower guide-rod. Then the rod 165<1> is oscillated to remove these teeth, a pick of weft 200 is inserted, the previous pick being beaten up by blades 51, 52 on the shuttle carrier, the shed is changed, the guide-rods 178, 178<1> are oscillated, and the lower inserting-rod 165 is rocked so that its teeth move upwards, as shown in Fig. 22, thereby moving the short threads from the grooves in the lower guiderod to those in the upper rod. Another pick of weft is then introduced, and analogous operations take place until the short threads are interwoven with several picks, after which the plates 81, 82 are rotated to bring the other gripping-device to the inserting position, the jaws of the gripping- device which moves away from the fell of the fabric being momentarily opened to release the threads held thereby. The gripping-devices 60, 61 comprise blades 61 secured to shafts 62 rotatable within the parts 59, 60 of the gripping-devices, the opening and closing of which are governed by cams acting on rollers 71, 74. The gripping- devices are caused to slide within grooves in the plates 81, 82, when in the receiving position, so as to draw the required lengths of thread from the spools 195 before these are cut by the rotating cutter 127. This sliding movement is caused by a cam-groove 84 in a plate 83 mounted loosely on the shaft 34 acting on rollers 94 controlling the gripper-devices, the plate being oscillated by a rod 104 controlled by a cam and connected to an adjustable block 101 on a lever 99 pivoted to the plate 83. The position of the block 101 can be adjusted by a screw 102 to vary the extent of oscillation of the plate 83 and consequently the lengths of threads taken from the spools by the gripper-devices. The rods 178, 178<1> are controlled from the shedding-mechanism. The shuttle is handed across the shed by shuttle carriers, which meet at the centre of the shed, and the non- continuous threads may be placed along the continuous warp threads as shown in Figs. 31 and 32, or between them. Different spools 195 are brought into position opposite the gripping-devices after such operation, so as to give the required pattern.