Patent GB-416719-A (GB)
Title: Improvements in and relating to spinning, doubling and twisting machinery
IPC: D01H1/00
Filed: 1933-02-13
Abstract: 416,719. High-speed spinning, doubling, and twisting machines. FERRANTI, G. R. Z. DE, (Executrix of FERRANTI, S. Z. DE), Wood Green Farm, Upper Basildon, Pangbourne, Berkshire. Feb. 13, 1933, No. 4342. [Class 120 (ii).] In machines for spinning, doubling, and twisting at high speed, especially machines of the kind first described in Specification 18047/03, [Class 120], the flyers are air driven at pressures from 1 to 2 lbs. per square inch and the bobbin tube is mounted on a dead spindle and is braked, automatic cut-off of the air supply taking place on breakage with full braking of the tube ; the feed rollers are set at an angle so that the thread enters and leaves in the same plane and means are provided to sever the yarn in the event of any obstruction in the supply. The flyers are formed by electrodeposition, preferably of copper, upon a suitably shaped mandrel. The invention is described as applied to Ferranti machines, such as described in Specifications 18047/03, 18260/04, or 24941/06, [all in Class 120], the driving of the flyers being on the lines described in Specifications 18260/04 and 16716/05, [Class 120]. The general arrangement of the machine is shown in Fig. 1, the air flow to the flyer turbines being from a chest 76 to the flyer casings 77 with exhaust to the atmosphere, and there being connection between the turbine side of the flyer valve 136 and an aneroid 73 whereby the spindle is automatically braked fully if the flyer is stopped. The yarn passes from supply cops 101, mounted in pairs in the case of doubling, through grid tension devices 103, over pulleys 113 and clearers 114 on balanced arms 102, and through an extended path over overhead rollers 147 to feed rollers 80, 81. Each arm 102 is provided with two pivot pins 111, 112, Fig. 23, and is so balanced that if, owing to faulty yarn attempting to pass the clearer 114 or to obstruction in the supply, the yarn tension is unduly increased it moves about the pin 111, and if the yarn is severed or broken it moves about the pin 112. The clearer 114 comprises a spike 117 cooperating with a groove in the pulley 113. Adjacent to the pulley scissor blades are arranged and are coupled by a wire 121<a> to a frame projecting through a slot 121 in the arm 102 which is so shaped that, when the arm moves about the pin 112, it does not affect the wire 121<a>, but, when the arm moves about the pin 111, the wire is moved to effect the severing of the yarn. Thus, when the yarn is broken or severed the arm moves about the pivot pin 112 and the pin 111 engages a tablet and raises a wire 124, Fig. 1, connected to trip gear controlling the air valve of the flyer. The trip gear comprises toggle mechanism which, when released by a tongue 129 operated by the wire 124, actuates an arm 130 and a lever 137, Fig. 11, and so closes the valve 136 of the flyer turbine. The starting-rod 135 is provided with a finger 134 adapted, when the rod is operated to open the valve 136, to release the flyer brake 131 which is applied by a spring- controlled framework 132 when the starting- rod is released by the trip-gear. A delay motion, comprising a rotating ratchet-like roller adapted to engage a spring tongue on the starting-rod, is provided to ensure that the spindle stops before the flyer. As stated above, the aneroid 73 may be connected with the flyer valve to actuate the spindle brake ; alternatively, a detector 142, Fig. 1, may be provided so that, when the drag on the yarn is reduced upon arrest of the flyer, it falls forward and closes a valve 146 in the air supply of the aneroid. The braking of the spindles is varied as the yarn is wound on by a ramp acting on the brake controls and operated by cam mechanism as described in Specification 416,718. The delivery rollers are rotated by worms 83 on the flyer spindles and by the pull of the yarn. To facilitate the mounting referred to above, the lower roller comprises a shell 84, Fig. 18, with a tubular hub 85 and a worm wheel 86 mounted on a conical pin 87<a> lubricated from a trough 90. A shield 92 protects the lubricating arrangements from water if used for wet spinning and doubling. The upper roller is carried by an arm 94 and comprises a disc 96 bushed with carbon and rotating on a steel pin 99. The grid tension arrangement 103 comprises co-operating beaded plates connected by a light cross arm 107 and cross pivoted as shown in Fig. 30 so as to tend to approach each other by gravity and to control the yarn independently of springs. Specification 416,717 also is referred to.