Abstract: A device for joining together two ends of a yarn in order to recreate the initial structure of the yarn comprises two heads provided with radial slots and fixed to rods which are rotatable in order to take up the yarn by means of the slots and to wind the yarn about the rods. The free ends of the yarns are untwisted and subjected to electrostatic fields created between the heads and an annular electrode. Rotating the heads in the opposite direction then causes the yarns to unwind from the rods and the fibres of the two ends of the yarn to twist together, the yarn then being released.

Abstract: A thread-tying device for a spinning frame has a yarn locating head which locates the broken end of the yarn on the spool and is connected by a transmission which transmits the movement of the drive shaft to the disengaged spool. The broken end of the yarn is recovered and retained while the transfer mechanism conveys the yarn into the proximity of the turbine outlet. The mechanism has guide means determining the trajectory of the head between a position in which the transmission member is simultaneously adjacent the spool and the drive shaft, and the position in which the yarn retained on the head is carried substantially to the level of the turbine outlet.