Patent GB-458807-A (GB)
Title: Improvements in or relating to yarn or like winding machines
IPC: B65H54/38
Filed: 1935-06-28
Abstract: 458,807. Winding yarns. UNIVERSAL WINDING CO., 95, South Street, Boston, U.S.A. June 28, 1935, No. 18616. Convention date, Jan. 11. [Class 120 (ii)] The synchronism between the speed of the rotatable winding spindle and the yarn-traversing means of a yarn or like winding machine is disrupted to prevent the formation of ribbon wind by driving one of the elements by a variable-speed prime mover and periodically varying the speed thereof ; the prime-mover may be a polyphase alternating current electric motor and its speed varied by periodically interrupting the supply of current to a portion or the whole of the phase windings of the motor. The package on the winding spindle may be rotated by a drum and as shown is rotated by the helically-grooved drum 10, Fig. 1, which traverses the yarn and drives the package P ; the drum shaft 11, and a corresponding shaft 13, Fig. 2, at the other side of the machine, are driven through belt gearing 71, 78 from shafts 64, 65 which are geared together, the shaft 65 being driven by belt gearing 102 from a three-phase electric motor 95 having windings 105, 106, 107 connected to a current source 108 through a starter 109 and automatic switches or circuit breakers 110, 111 in circuit with the windings of the motor. The switches 110, 111 are of the tiltable liquid-contact type and are periodically tilted to open and close the circuit through a part or the whole of the phase windings of the motor so as to cause variations in the speed thereof and consequently in the speed of the driving and traverse roll 10, the package P slipping on the periphery of the roll as the speed changes and causing the synchronism between the rotation of the package and the yarn traverse to become disrupted at frequent intervals. The switches 110, 111 are mounted on a bracket 113 on the end of a shaft 52 which is rocked by an arm 89 engaging a cam 86 on a shaft 80 driven by worm gearing from the shaft 64. The bracket 113 has an extension 122 with a pin 125 connected by a spring 119 with a pin 118 extending from a stop 112 fixed to the rock-shaft 52 and the bracket may be adjusted relatively to the stop 112 so as to vary the periods when the switches are opened and closed by movement of a set-screw 124 screwing through the extension 122 and bearing against the stop. When starting the machine, the switches are closed by rotating a handle 136 so that an arm 143 carried thereby engages a pin 129, projecting laterally from the extension 122 on the bracket 113, against the action of the spring 119 and, when the motor has attained its maximum speed, the handle is released and the spring then moves the bracket into engagement with the stop 112 and the bracket is rocked to tilt the switches. The shafts 52, 64, 65, 80 and associated parts are mounted in a housing 50 suspended on the shaft 52 which is journalled in brackets 37, 38 having horizontal slots engaging eccentric discs 40 on a shaft 42 mounted between the cross frames 20, 21 of the machine and by loosening nuts on the ends of the shaft 42 and rotating the discs 40, the housing 50 may be adjusted in the frames 20, 21 to tighten the belts 71, 78 ; arms 58, 59 slidably mounted on the machine bed can then be adjusted to engage opposite sides of the housing to prevent lateral movement thereof. The prime mover may be a direct or alternating current motor, the latter being of the single-phase induction or repulsion type or a multiphase induction motor having either a squirrel cage or wound type of rotor ; the circuit breakers may be applied to one or all of the phase windings and when a direct current motor is used the ribbon-breaking mechanism may operate with a resistance winding so as to vary the speed continuously or periodically.