Patent GB-459357-A (GB)
Title: Winding machines for yarns and threads
IPC: B65H54/24
Filed: 1935-05-03
Abstract: 459,357. Winding yarns &c. ABBOTT MACHINE CO., Wilton, New Hampshire, U.S.A. May 3, 1935, No. 13235. Convention date, May 19, 1934. [Classes 20 (ii) and 20 (iii)] A yarn or thread winding machine having a mechanism for uniting broken strands, a number of winding units travelling relatively to the mechanism so that the latter is associated successively with the units, means for detecting imperfections in the yarns &c., suction-operated means for finding an end of yarn &c., and means for carrying the yarn &c. to the uniting mechanism, is provided with mechanism which acts to stop winding on any unit in which an imperfection occurs in the yarn &c. and with means adapted to act upon successive units to unite the parts of an imperfect or broken yarn and to cut off the part containing the imperfection; each unit may comprise a slub catcher which breaks the yarn upon the occurrence of an imperfection and the broken end on the winding package may be allowed to wind thereon and be found by mechanism which associates them with the uniting mechanism. As shown in Figs. 1 and 2, the machine comprises a number of travelling winding units moved in succession past the uniting mechanism, each unit being mounted on a carrier 22 conveyed along guide rails 20, 21 by an endless chain 23 and flexibly connected thereto so as to pass around the semicircular ends of the machine. A supply bobbin M for the unit is mounted on a peg 24 on a plate 25 mounted on a shaft 27 rotatable in the carrier and yarn passes from the bobbin M, through tension discs 30 and a slub catcher 31, and over a pivoted bail 32 to the winding package P on a spindle 35 rotatable in an arm 36 pivoted to the head of the carrier, the package being rotated by a longitudinal driven roll 40 and the yarn being traversed on the package by means driven from the roll. The bail 32 has an extension 32a connected to an arm 49 on a shaft 51 carrying a crank arm connected to the arm 36 by a rod 53 and, while the bail 32 is depressed by the running yarn, the arm 49 is held clear of a series of short pins 57 on the rail 20 but should the yarn become broken or exhausted the bail rises and causes the arm 49 to move into contact with the next pin it meets and turn the shaft 51 to raise the package P out of contact with the drive roll 40 ; each package is also raised to stop winding just before it reaches the end of the roll 40 by a long pin 58 on the rail 20 contacting with the arm 49 and is lowered for re-winding by a stationary cam on the rail 20 engaging a member 50 on the arm 49. The supply bobbins for replacing exhausted bobbins M are disposed in compartments 72 of a magazine 71 surrounding a central suction pipe 76 and the magazine comprises plates 73, 74, Fig. 5, the plate 74 resting upon a disc 77 and being frictionally driven thereby when an armature 92 of a solenoid 93 mounted on the pipe 76 is drawn up out of contact with each of a series of stop pegs 91 on the plate 73 opposite each compartment 72 ; the bobbins R in the compartments are supported on hinged bottom flaps 95 kept up during the rotation of the magazine by a circular strip 98 until a bobbin comes adjacent a carrier 22 from which an exhausted bobbin has been doffed, when the flap supporting the bobbin is allowed to drop and discharge the bobbin down a pivoted shoot 101 on to the peg 24 of the carrier. The ends from the supply bobbins R are laid over the top of the pipe 76 which, at its lower end, is connected to a suction device and a pipe 108 within the pipe 76 and also connected to the suction device, terminates in a nozzle 112 disposed adjacent a roll 111 in line with, but driven oppositely to, the roll 40, and having its opening leading at one end to a slit 113 in the pipe 108 ; a slotted suction pipe 108a leading from the pipe 108 terminates in a nozzle 120 disposed adjacent the slub catcher 31 of the carrier at the end of the machine. When the yarn S<1> between a bobbin M and package P breaks or is broken in the slub catcher, the package is raised to stop winding until the carrier meets a cam 61 on the rail 20 which lowers the package on to the roll 111 to unwind the package for the end P<1> thereon to be carried by the slotted suction pipe 108 across the magazine and pipe 76 while the end of the supply bobbin M is similarly carried by the suction pipe 108a so that the two ends lie together across the hooks 125, 126 of a knotter 122, a curved wire 115 supporting the ends out of engagement with the compartments 72 and supply bobbins R therein ; if the bobbin M is exhausted and doffed, the end R<1> of a fresh supply bobbin R passes, with the end of the yarn P<1>, across the jaws of the knotter as the bobbin is discharged on to the peg 24 of the carrier. After the yarn ends are knotted together the package is raised from the roll 111 by a long pin 581 contacting with the arm 49. The knotter is of usual construction and is supported in an inclined position on a bracket 123 in the magazine so that the hooks 125,126 and knotting bill 124 extend above the top of the magazine and the actuating shaft 128 of the knotter is connected by a lever arm and link with the armature 131 of a solenoid 132 which, when energized, actuates the knotter to tie the ends lying in the hooks 125, 126 and sever the free ends which are drawn down the pipe 76; a spring 133 tends to raise the armature 131. The doffing of the bobbin M when exhausted is controlled by a series of spaced detector fingers 136, 137 carried by sleeves 138, Fig. 10, loose on parallel shafts 148, 156 geared together and having cam slots 159 engaging pins 157 on the shafts ; the shaft 148 is geared to a sector 142, Fig. 11, controlled by a spring 149 and having a cam arm 143 which is engaged by a roller 144 on the passing carrier to rotate the sector against the action of its spring ; the pins 157 are normally at the tops of the slots 159 and so rotate the fingers 136, 137 towards each other. If a yarn S<1> is passing from the bobbin M to the slub catcher the swinging movement of the fingers is checked and the sleeves 138 rise on the shafts 148, 156 and move a rod 163 connected to a pivoted mercurv switch 165 which is tilted to close a circuit, Fig. 18, which includes a solenoid 171 having an armature connected to a doffing cam 70 which is pivoted by the armature out of the path of an arm 28 on the shaft 27 of the carrier to prevent doffing of the bobbin M ; if there is no yarn passing from the bobbin M to the slub catcher, the fingers 136, 137 move freely across each other and the switch 165 remains open and the cam 70 contacts with the arm 28 to tilt the peg 24 and doff the bobbin M. When a bobbin is not doffed from the carrier, the operation of the magazine 71 and discharge of a bobbin R therefrom is prevented by a mercury switch 185 in series with another mercury switch 175 and the solenoid 93 and mounted on the doffing cam elements so as to be opened when the cam is moved out of doffing position ; the switch 175, and a switch 195 controlling the knotter solenoid 132, are in a casing 176 and are actuated by connections from pivoted levers 181 on a shaft 177 by a pin 184 on a passing carrier to close the switches and cause actuation of the solenoids 93 and 132. The pivoted levers 181 are spaced on the shaft 177 so that the switch 195 is closed and the knotter actuated after the closing of the switch 175 and the actuation of the magazine. In a modification the slotted pipe 108a is extended with its nozzle positioned adjacent the supply bobbin M as it nears the end of the machine so as to take up a loose or broken end on the bobbins or an end extending therefrom to the slub catcher and the detector fingers for controlling the doffing of the bobbin are replaced by a curved detector wire pivoted to the wire 115 and carrying the mercury switch 165. The machine may have the travelling and winding mechanism described in British Specification 268,161, [Class 120 (ii)], or that described in U.S.A. Reissue Specification 18,310 ; the yarn tensioner may be that described in U.S.A. Specification 1,965,363, the slub catcher that described in U.S.A. Specification 1,905,259 and the knotter that described in U.S.A. Specification 755,110. British Specifications 459,413 and 459,414 also are referred to.