Patent GB-604354-A (GB)
Title: Yarn winding machine
IPC: B65H54/14
Filed: 1944-09-28
Abstract: 604,354. Winding yarn. CLARK, D. M. (Abbot Machine Co.). Sept. 28, 1944, No. 18632. [Classes 120(ii) and 120(iii)] A yarn winding machine is provided with means for rotating a winding bobbin, a reciprocating traverse rod having a stroke a fraction of the length of the package wound on the bobbin, a thread guide frictionally connected to the traverse rod, means for automatically sliding the thread guide along the traverse rod from base to tip of the bobbin during winding and means for sliding the thread guide along the traverse rod to a position adjacent the location of the base of the next bobbin to be wound. Each winding bobbin is, carried between a centre 60, having 'a serrated edge 61, and a centre 100 carried on a rod 102, spring-urged at 105 and operated for the release of the wound bobbin by a stationary cam 110. The centres 60 and 100 are supported on a frame element 40 which engages a rail 11 through rollers 41, 42, 43, 44, the element 40 being moved along the rail by a chain 14<SP>1</SP> passing about sprockets 15 driven by an electric motor 20. The thread traversing arrangement comprises a pivoted plate 144 having thread guides 145, 149, and a thread package feeler 155, the thread guide frictionally embracing a traversing rod 66 reciprocated through a pivoted link 80 by a double heart-shaped cam 72, driven by worm and worm wheel from an electric motor 63 also carried by the element 40. The supply package 53 for each winding unit is carried by a member 52 supported from the element 40 and a lower rail 12, the yarn from supply passing through a yarn tensioning device 58 and then through the eye of a yarn-breakage detector 146. Upon breakage of a yarn, the detector 146 drops to permit a latch 135 to be withdrawn from a mercury switch 130 to open the same and stop the motor 63. When the bobbin is filled, the thread guide assembly moves the bracket 116, or a stop collar on the rod 179, to operate the motor switch' in similar manner. A blade 160 furnished with teeth 161 is carried by the bracket 116, the teeth allowing movement of a pawl 157 in one direction but not in the other. By this means the feeler 155 and its pawl 157 effect the building of the package, the thread guide assembly being gradually moved toward the tip of the bobbin. The toothed blade 160 may be shaped so that the shape of the bobbin wound may be varied. Attached to the top of the thread guide assembly is a roller 165 which, upon contacting a stationary cam 170, is moved to position the yarncarrying eye 149 beyond the vertical plane through the centre 60 so that the yarn extends between the eye 149 and a camoperated hook 344 below the winding- head and is also still attached to the doffed bobbin in a chute 200, the yarn lying across the centre 60. The chute 200, carried by the winding head, is furnished with a door carrying an adjustable finger 205 which, upon contacting an adjustable pin 207 in the path of travel of the head, opens the door to allow the doffed bobbin to leave the chute 200 and enter a receptacle 208. The various doffed bobbins, by suitably adjusting the fingers 205 and pins 207, may be collected according to colour &c. in different receptacles 208. The empty bobbins are fed to the machine from a hopper 290, the feed means including a pair of spaced plates 292 vertically reciprocated by an electric motor through a vertically disposed chain 305. The plates 292 are spaced sufficiently to allow the tips of the bobbins to fall between them, but the bases rest on the tops thereof and pass about the sloping top edges to a magazine 112 from which they are removed by the travelling winding heads. The new bobbin as it is gripped between the centres 60, 100, forces the yarn against the head 60 and spring-urged scissors operated as the winding head moves on, close to sever the yarn. A cam surface 170a operating upon the roller 165 restricts the normal movement of the traverse mechanism to effect the winding of a bunch before normal package building commences. The supply of electric current to the motors 63 of the winding heads takes place through a rotating vertical reel 255 located suitably in the run of the heads, such reel operating through a spiral spring to pay out or take up feed wires 257 connected to the motors through travelling wires 250, 251 and the mercury switches 130, the reel being supplied with current from a suitable source through brushes and slip rings. In a modification, the feed means for the empty bobbins feeds them through a release gate to spring-urged fingers which hold them substantially horizontally until the passing winding head runs over them. The current supply means comprises spaced conductor rails from which current is taken by brushes on the winding head. When winding is completed a pin in the path of travel of the heads lifts the brushes from the rails to stop the motors. In this modification, a stationary cam ensures that as each winding unit completes its circuit, the motor there of will be switched off and a finger on the framework contacts each bobbin tip to ensure positive ejection from the holding centres 60, 100. Further severing of the yarn takes place through a knife-edged plough-like member, attached near to the centre 60, engaging the yarn as it is turned by the rotating centre 60. In the preferred embodiment, the configuration of the double cam 72 is such that the movement of the thread guide towards the tip of the bobbin is faster than the movement towards the base of the bobbin, and the throws of the cams are preferably such that the amount. of traverse from base to tip and tip to base follow the sequence 1# in.. 1¢ in., 1# in., 1¢ in. Specifications 522,664, 604,419, 604,420, 604,421 and 604,422 are referred to.