Patent GB-250657-A (GB)
Title: Improvements in or relating to machines for covering elastic, wire and other cores by winding
IPC: D02G3/36
Filed: 1925-01-14
Abstract: 250,657. Benson, J. F., Windram, H., and Loweth, J. W. Jan. 14, 1925. Cores, covering by winding.-In a machine for covering elastic, wire or other cores wherein the bobbin, spool or like supply 13 of covering material is carried upon a flyer bodily around the core a without the core passing through the bobbin &c., the bobbin is fixed relatively to the flyer, and the covering material c uncoils substantially longitudinally therefrom. The machine preferably comprises a number of sections or units each comprising flyers for covering one or more cores and equipped with independent driving, stopping, drawing and take-up means and removably supported upon a main frame 1 by claws 4 and hook bolts 5. Each section comprises one or more pairs of flyers arranged concentrically above one another and rotating in opposite direction so the twists of the coverings laid thereby are of opposite hand, each flyer consisting of a gear wheel 9, by which it may be driven from the countershaft 30, a central sleeve 10 through which the core a passes, and secured to the wheels 9 pins 4 to which the bobbins 13 are secured by springs etc.; the pins 14 are jointed at 15 to facilitate removal of the bobbins. The upper end of the flyer is supported by ball bearings carried in a block 12, Fig, 7, to which is secured a number of radially extending tubes 16 containing spring-controlled plungers 17. Each plunger 17 has projecting therefrom a pin 19 extending through a slot 18 in the tube and normally engaged by a detent 20, the covering material c upon leaving the bobbin 13 being led through a pivoted guide 23 which is held normally out of engagement with the detent 20 by the material c, but which when the material breaks is swung centrifugally so as to engage the detent 20 and release the plunger 17; release of the plunger 17 actuates a clutch to stop the section of the machine. The clutch comprises a collar 33 carried upon a bevel wheel 32 driven from the shaft 30 and having spring-pressed pins 34 engaging in slots in a collar 36 carried upon a vertical shaft 25, and is held normally out of action by a flat spring 38. For operating the clutch a lever 37 is provided, actuated by depression of a rod 42 by means of a hand-operated slide 39, which is controlled by a spring 43 which also tends to hold the clutch out of action. The slide 39 is locked in the operative position by a vertical rod 44 which engages a recess 46 in the slide, a push rod 58 adapted to engage a pin 62 extending from the rod 44 being provided for manually releasing the slide for declutching. The slide is automatically released when the covering material breaks by the engagement of the plunger 17, rotating with the flyer, with a lug 49 upon the rod 44, a roller 50 carried upon the rod coacting with a cam surface 51 to lift the rod out of engagement with the slide 39. The rod 44 is re-set for locking the slide by means of a push rod 64 which engages the pin 62. The core is fed through the flyers by a draw roller 71 carried by a spindle 72 mounted in brackets 73 and driven through worm gearing 76, 77 from the vertical shaft 25, and the covered core is guided to the roller 71 by grooved pulleys 79 and prongs 80. One roller 71 may be provided for feeding the cores from two pairs of flyers. The covered cores are wound upon bobbins 95 or swifts 94 mounted upon shafts 82, 83 driven preferably by a chain drive from a sprocket on the spindle 72, the sprockets on the shafts 82. 83 being connected to the shaft by spring-pressed balls which engage recesses in the shaft to allow of slipping due to variation in the tension of the cores. When wire cores are to be covered a pressing roller may be associated with roller 71 to prevent the covered wire flexing when passing round the roller 71, the pressing roller being carried upon a pivoted lever so as to be maintained in contact with the roller 71 either by a spring or by a weight hung at the end of the lever. The bobbins 96 upon which the uncovered cores are wound are provided with spring or weight controlled brake bands.