Patent GB-967392-A (GB)
Title: Spinning machine for the production of cops
IPC: B65H54/14
Filed: 1961-12-07
Abstract: 967,392. Automatic speed control. P. DILLIES, G. LEMAIRE, and J. PINCHON, Dec. 7, 1961 [Dec. 15, 1960] No. 43788/61. Heading G3R. [Also in Division D1] Apparatus for producing cops from slubbings supplied directly from a slubbing-producing machine, comprises a number of units each including a spindle and ring, means for driving the spindle and ring from the producing machine at different speeds, means for relatively reciprocating the spindle and ring with variable amplitude about a changing centre, means for changing the difference in the speeds of the spindle and ring during each reciprocation, to allow for the changing diameter of the wind, between higher and lower values and for changing the lower value from a maximum at the start of a cop to a minimum when the maximum diameter of the cop is attained and then maintaining it constant for the rest of the build, whereby each slubbing is taken up at the speed at which it is delivered throughout the build; and means for passing the finished cop through the ring, for starting a fresh cop, for cutting the yarn between the finished and fresh cops, for causing the finished cop to be ejected and for bringing the spindle and ring into their starting positions. Means are provided for manually pre-setting the ratio between the drives to the slubbing-producer and the spindles; also interchangeable parts enable the cop-diameter and winding-pitch to be changed at will. Clutches in the drive to the spindles and the "winding-stock mechanism" (see below) enable the spinning apparatus to be disconnected for repair. General installation: drive to ring and spindles: reciprocation and advance of the spindles. The installation, Fig. 1, comprises a carding- engine 1, a divider 2, a rubber 3, and a spinning- unit 4 comprising four superposed banks of horizontal spindles. The cops are formed by reciprocating each spindle which is driven relatively to a ring which is also driven and has an eye through which the sliver passes to the spindle, which arrangement is stated to provide a false-twist to strengthen the sliver in addition to the spinning twist. Means for doffing the cops is also provided. Each spindle 61, Fig. 6, is connected by a screw 62 in a key-way 63 to a rotary bush 51 of which a conical nose 60 acts as cop-former. All the bushes in a row are carried by a holder 54; all the spindles in a row by a spindle-holder 66, and all the rings 21 in a row by a holder 15. For rotating the rings, each has a gear 22, adjacent gears in each row being interconnected by meshing gears and the first gear on each row being operatively connected to a sprocket 36 Fig. 1 while the four sprockets are interconnected by a chain 37 driven by the output shaft 38 of a change-speed device V 1 . For rotating the spindles, each has a gear 71, the gears in each row being interconnected by meshing gears and the first gear on each row being operatively connected to a sprocket 84, Fig. 1 while the four sprockets are interconnected by a chain 85 driven by the output shaft of a second change speed device V 2 . The speed of rotation of the rings and spindles is kept in relation to the speed of the carding engine. To this end the devices V 1  V 2  are driven from the carding-engine motor MC. V 1  is driven by a motor MV fed by a generator G 1  of a Ward Leonard set GL which is fed from a tacho generator GT driven by motor MC through an amplifier A controlled by a potentiometer PD the purpose of which is explained later. V 2  is driven from MC through a shaft 264, a clutch 259 and a chain over a pulley 95. To build the cops, the holders 54 and 66 of each row are reciprocated together on dovetail guides, but the two sets of holders move independently for doffing. The four sets of holders 54 are interconnected by cables 111, Fig. 4, trained over loose pulleys-and a driving pulley 118 on a shaft 119 which is rocked to provide the traverse and angularly advanced to provide the gain, and backrotated for doffing. The four sets of holders 66 are carried on racks 125 Fig. 6, each driven by a gear 126 secured to a shaft 114, the four shafts being interconnected by a chain and sprocket transmission 272, 271 driven by a gear 276 which during the wind is driven from the rocked and advanced shaft 119 by the transmission shown on the left of Fig. 4 through a clutch 286, clutch 285 of a supplementary drive me for the doffing operation then being disengaged. The change-speed devices V 1  V 2  can be adjusted manually at 42, 102. The winding-stock mechanism. Shaft 119 is the output shaft of a winding-stock mechanism, Fig. 9 the shaft has a gear 143 meshing a worm 142 on a shaft 139 fixed to a carriage 138 reciprocated by levers 177 one at each side of a fixed casing 168 which pivot about an axle 185 and which are connected to the carriage at 183, the top ends of the levers being moved to and fro by an axle 175 moving in a fixed slot 178 as a drum 171 with a cam groove, rotates. The drum 171 is rotated from the input shaft 155, by a chain and sprocket transmission 159, 161, 162. Each reciprocation of the carriage therefore reciprocates the worm 142 and rocks gear 143 and shaft 119; also, the angular position of the gear 143 and shaft 119 is changed at each reciprocation by a ratchet wheel 212 which is engaged by a pawl 213 on a member carried by shaft 139, the member engaging a fixed cam 218 (not shown) to cause the pawl to rotate the wheel 273 through one or more teeth as desired at each reciprocation of the carriage, the diameter of the cops being therefore changeable by changing the cam. The amplitude of the reciprocation of shaft 119 is gradually increased at the start of the wind by gradually raising the pivot 185 by means of a member 194 which advances to the right as a worm 201 is rotated from the shaft 139 by meshing gears 206, 205, the pivot 185 gradually riding up parallel inclined slots in a forked end of the member 194, the amplitude finally remaining constant when the pivot 185 reaches the top of the slots. The pivot 185 is connected to the slider of potentiometer PD referred to earlier, so that when the levers 177 are vertical the supply voltage for motor MV is at minimum and when the levers attain their maximum inclination the voltage is at maximum. Consequently, the build being conical, until each time the shaft 119 is rocked to provide the traverse the speed of the ring increases and decreases as the winding diameter changes; also the maximum speed attained by the rings during each traverse is gradually increased as the diameter of the cop increases, until, when the maximum diameter of the cop is attained the maximum speed remains constant. The parts including shaft 119 are returned to starting position at the end of a wind as follows. Shaft 119 also carries a gear 144 meshing with a rack 145 of a member 146 supporting at an end of adjustable length a roller 237 carried by the ends of two similar levers 232 resiliently pivoted at 233. As the angular position of shaft 119 changes, member 146 gradually moves to the left until, at the end of a wind, the roller 137 is no longer supported by the end of the member and a spring 231 becomes free to declutch sprocket 159 and clutch the shaft 155 to the shaft 139, means being provided whereby the pawl 213 is at this juncture lifted off the wheel 212. The shaft 139 and consequently the shaft 119 are rapidly back-rotated and the carriage 138 being locked in position because the drum 171 is no longer drive, shaft 119 is also back-rotated to starting position. Accordingly, member 146 moves back to the right until its end again lifts roller 137, and the screw 201 is back-rotated through gears 206, 205 moving rule 194 to the right. The member is prevented from moving completely back to its starting position because the movement of the spindle 185 which is lying in the inclined slots at the forked end of the member is restricted by the fact that the slot is partly out of register with the slots on the levers 177 and the sides of the casing 168 in which spindle 185 is disposed. The screw, however, continues to rotate until an adjustable stop 253 therein engages lever 232 and moves it to the right against the force of spring 231 to de-clutch the drive to shaft 139 and re-clutch the drive to shaft 163. The slots in the levers 177 and casing 168 now move into register with those in the member 194, and the screw 201 and member 194 are free to be moved to normal working position by a spring which has been compressed during the back-rotation of the screw. The input shaft 155 of the unit is driven by the shaft 275 Fig. 1 of the carding engine through belt and other gearing from a reversing-box 265, and a clutch. By changing a pulley 255 (Fig. 3 not shown) on the input side of shaft 155, the winding pitch can be changed. Doffing arrangements. As explained, during the wind, the holders 45, 66 follow the movements of shaft 119, the holders being operatively connected to the shaft through a clutch 286, Fig. 4. When this is disconnected, holders 66 can be moved relatively to holders 54 by operating the gear 276 through an alternative drive provided by a drum 282, which is rotated clockwise by a motor me through a clutch 285 or anticlockwise by a falling counterweight 284 when clutch 285 is disconnected. At the end of a set, each spindle with its bush and holder 66 is at the extreme right hand side of Fig. 6; at this point, the back rotation of shaft 119 commences so that the holders 66 and 54 with their bushes 51 and spindles 61 move rapidly to the left, so that a coil of wide pitch is wound on the outside of each cop. During this movement, clutches 286 and 285 become disengaged the former separating the drive from shaft 119 to each spindle-holder 66; bush-holders 54 however continue to move to the left so that the cops are pushed along their spindles and separated from the noses 60. Clutch 285 being separated, a counterweight