Patent GB-1101481-A (GB)
Title: Winding machine
IPC: D03D45/50
Filed: 1965-01-08
Abstract: 1,101,481. Winding yarns; doffing; conveying doffed bobbins to storage compartments; automatic bobbin changing looms. LEESONA CORPORATION. 8 Jan., 1965 [16 Jan., 1964], No. 856/65. Headings DID, D1E, D1F and D1J. The invention is concerned with a yarn winding machine of the kind in which any one of a plurality of different kinds of yarn can be selected to be wound into a package, and in which when the package is finished it is doffed and placed in a magazine having a plurality of separate compartments, there being one compartment for each of said different kinds of yarn. According to the invention, after the finished bobbin has been removed from its spindle the outer yarn end of the package is held. Fig. 1 shows a package in the process of being wound from yarn passing through a first clamp-shear unit 24. When the package is finished it is doffed and dropped on to a shelf (104) Fig. 5 (not shown). Whilst the package is lying on the shelf a yarn carrier 60 moves to the right in Fig. 1 to carry the yarn extending between the package and clamp-shear unit 24 to a suction tube 62. When the shelf (104) is subsequently retracted the package drops down into its appropriate compartment and the yarn end travels down an elongated slit in the side of the suction tube 62. The yarn packages are then stored as indicated at B' with their yarn ends extending under tension into the suction tube 62. The slit in the side of the suction tube is normally closed by a door 66 that opens whilst a yarn is travelling down the length of the slit. When a different yarn is to be wound, a yarn positioning bracket (12) is rocked so as to position the corresponding clamp-shear unit 24 of the selected yarn in correct position for yarn winding by means of a traversing guide 22. The yarn passes to the bobbin over a breakage lever 23 which, if the supply yarn breaks or becomes exhausted, deflects to cause the winding machine to stop. The magazine 40, see Fig. 3, includes a plate 150 that can swing about a horizontal shaft 152 at the upper parts of the magazine. The plate 150 has side flanges 156 to maintain a bobbin on the plate. The shaft 152 has a pulley 158 at one end around which is wrapped a cable 160 coupled to a tension spring 162 so as to biass the plate 150 counterclockwise about the shaft 152 as viewed in Fig. 3. At its other end the shaft 152 carries a pulley 159 around which is wrapped a cable having its other end attached to means coupled to a bracket (12) in which the plurality of a clamp-shear units are mounted. Thus according to the setting of the bracket (12), to determine the appropriate one of the plurality of yarns that is to be wound up by the bobbin, the plate 150 is rocked about its shaft 152 to cause the plate 150 to adopt a setting in which, when the completed bobbin B is doffed, the doffed bobbin will drop down into the appropriate compartment of the magazine 40. As shown in Fig. 3 the plate 150 is rotatable about the shaft 152 so as to intercept the upper reaches of each of the compartments 40a-d of magazine 40. As the plate 150 is rocked about its shaft 152, a bobbin rolling downwardly on surface 155 thereof would be delivered to either compartment 40a or 40b, whereas a bobbin B rolling down surface 154 of the plate would be directed to either compartment 40c or 40d, the particular compartment being determined by the angular setting of the plate 150 as controlled by the bracket 12 in Fig. 1. The apparatus is described as being used in association with a loom L and the purpose of having the yarn ends extending from the bobbins in the magazine 40 to the suction tube 62 is to ensure that the outer yarn end, or transfer tail, of each 'bobbin shall be held as the bobbin is placed in the loom shuttle at the time the shuttle is replaced. Thereafter, as the shuttle makes its first few picks through the shed, the yarn on the bobbin is fed off. Subsequently, this outer yarn end which extends from the woven fabric is cut at the selvedge.