Patent GB-1461884-A (GB)
Title: Winding apparatus
IPC: B65H63/00
Filed: 1974-04-02
Abstract: 1461884 Traverse control for the winding of flanged spools BEKAERT SA NV 2 April 1974 14582/74 Heading D1J An apparatus for winding thread onto a flanged spool 4 comprises a thread guide 8 arranged to traverse the thread 1 back and forth lengthwise of the spool, and means for detecting irregularities in the build up of the package at two zones each adjacent to a. respective one of the spool flanges, said detecting means comprising means 3 for sensing changes of linear speed of the thread upstream of the spool only when the thread guide 8 is in a position to guide the thread into either of said two zones.  In the wire winding apparatus of Fig. 1 the traverse motion is performed by an endless belt 9 driven by a reversible motor (12 not shown). The belt carries a platform 8 on which are cam plates 13 and 15 that cooperate with limit switches 16 and 19 such that at one end of the traverse stroke the limit switch 16 is tripped to reverse the motor (12); and at the other end of the traverse stroke the limit switch 19 is tripped to again reverse the motor (12). The platform 8 also carries a guide pulley 3 that is rotated by the passage of the thread 1 being wound. The pulley 3 is associated with means that determines its speed of rotation. If there is an accummulation of thread at either of the flanges 20, 21 of the bobbin 4 then, when the wheel 3 is traversed into the regions of said flanges, the accumulation will cause the speed of the thread drawn from the supply to increase and this increase in speed is translated into an output signal by the pulley 3 that causes the appropriate cam 16 or 19 to be moved away from the flange 20 or 21 of the bobbin 4. If, on the other hand, there is a deficiency of turns at either end of the flanged bobbin 4 then when the creel 3 is traversed into the region adjacent the flanges 20, 21 such a deficiency of turns will cause the speed of the thread drawn from the supply to decrease and this decrease in speed is translated into an output signal by the pulley 3 that causes the appropriate cam 16 or 19 to be moved towards the flange 20 or 21 of the bobbin 4. The cam 16 is mounted on a carrier 24 that is displaceable by a threaded shaft 22. The cam 19 is mounted on a carrier 25 that is displaceable by a threaded shaft 23. The carrier 24 carries an additional limit switch 17 that is brought into operation by a cam 14 on the guide 8 when the wheel 3 is at a distance d from the flange 20. The limit switch 17 is so wired into the circuit as to actuate gating means for inhibiting the output of the wheel 3 except when it is within the zone d at the flange 20. Similarly the carrier 25 carries an additional limit switch 18 that is brought into operation by the cam 14 on the guide 8 when the wheel 3 is at a distance d from the flange 21. The limit switch 18 is so wired into the circuit as to actuate gating means for inhibiting the output of the wheel 3 except when it is within the zone d at the flange 21. The pulley 3 may have an eccentric hole 32 that passes across a light beam from an emitter 33. A photo-electric cell receiver 34 on the other side of the pulley 3 receives light pulses as the pulley 3 rotates, these pulses being used as a measure of the speed of the pulley 3. A dancer pulley 2 acts as a bufferaccummulator.