Patent GB-674026-A (GB)
Title: Improved spinning frame for spinning cotton or other textile fibres
IPC: D01H1/02
Filed: 1947-10-07
Abstract: 674,026. Textile spinning frame. QUARENGHI, M., PIATTI, A., BONALUMI, E. Oct. 7, 1947, No. 26961/47. Classes 120(i) and 120(ii) A machine for spinning drawing frame slivers of cotton or other fibres has fibrecondensing plates located between each pair of drawing rollers and has all top rollers, except the first, weighted by lozengeshaped saddles pressed with two sides against the rollers by rods pivoted at an angle between the other two sides of the saddles. Slivers 9, Fig. 1, are preferably drawn from cans 8 by a driven roller 10 and pass over forked thread guides 11 to funnels 12 at the entrance to the drawing units comprising seven pairs of rollers 1a, 1b-7a, 7b. The attenuated slivers leaving the drawing units are twisted by ring and traveller spindles 14, above which they are guided by thread guides 61 supported by rods 63 pivoted to a rocking lever 18 connected to the ring rail 16, so that thread guides 61 and ring plates 15 may reciprocate together. Cops are built on the spindles 14 by the combined movements of the ring rail 16 and the spindles 14 mounted on a spindle carriage 25. The ring rail 16 is connected, by a link 17, to the lever 18 fixed to a shaft 19 reciprocated by a rod 98, Fig. 8, a lever 96 and a rod 94 having a cam follower 95 operated upon by a cam 92 fixed to a shaft 91 driven from the main motor drive of the machine. The length of cop chase is increased gradually as the cop bottom is formed by altering the position of the fulcrum pin 97 of lever 96 to vary the stroke of the ring rail 16. The pin 97 is mounted in a slideway 104 in a fixed support 101 and is pressed by a spring 102 and piston 100 towards a shaped member 103 fixed on the spindle carriage 25. As the latter descends during the building of the cop, the pin 97 is pressed outwardly against the resistance of the spring 102. The carriage 25 is moved downwards against the influence of a counterweight 73, Fig. 1, by a rack 26 and a pinion 27 on a shaft 76, driven through gears 83, 84 by a ratchet and pawl mechanism operated by the cam 92. Gear 84 is fixed to the shaft of a ratchet wheel 86 moved intermittently by pawls 87 on an arm 89 struck by the cam 92 at each revolution. The amount of movement of the pawls is determined by a screw 90 which may be manually operated to push the arm 89 away from the cam 92 against spring pressure. When the cops are completed, the carriage 25 may be raised rapidly to permit coils of yarn to be wound onto the spindles 14 beneath the cops to prevent breakage during doffing. As the carriage 25 is raised, an adjustable lug 107 upon it hits a lever 108, which rotates to turn a pawl 110, thereby pressing back the piston 100 and displacing the fulcrum 97 to increase the effective length of the left arm of lever 96, thereby increasing the amplitude of movement given to the ring rail 16. The rapid rise of the carriage 25 is assisted by a counter-weight arrangement comprising the weight 73 adjustable on an arm 74 fixed to a sector 75, Fig. 1, loosely mounted on the shaft 76. One end of a steel belt 77 is anchored on the periphery of the sector 75 and the other end is fixed on a drum 78 keyed to a pin 79 along with another sector 80, to which a second belt 81 is fixed. The spindles 14 are driven by individual belts 22 from a drum 23 mounted on the carriage 25. Jockey pulleys 69 tension the belts 22. Drive is transmitted from a fixed driving shaft 65 to the drum 23 by gears 66, 67, 68. In order that the spindles 14 shall reach full speed no later than the rollers 1a-7a when starting the machine, the start of the drawing rollers is retarded. When the starting. rod 113, Fig. 9, is lowered, arm 114 presses down a rod 115 to strike a roller 130 on a clutch-lever and de-clutch the gears 120. 132, 133, 139 from the main drive. Further lowering of the rod 115 causes a pawl 119 to rotate the gears 120, 132, 133, 139 sufficiently to displace a roller 140 engaged in overlapping grooves in the gear 139 and in a driving flange, so that when the motor starts a lost-motion takes place between the flange and the gear 139. The amount of lost-motion is adjustable and of sufficient duration to allow the spindles to rotate before the drawing rollers. The motor is not started until the arm 145 'strikes the push button 147, whereupon the lever 113 is released and rises quickly under spring influence to re-clutch the gears 120, 132, 133, 139. A sprocket alongside gear 120 drives the drawing rollers through a chain passing over a sprocket 53 on the bottom front roller shaft, Fig. 5, from which drive is transmitted to all the drawing rollers and the roller 10. Universal joints 55a-55f, 56a-56f and telescopic links are employed to maintain the drive to the rollers irrespective of the spacing adjustments made to the latter. The bottom metal rollers 1a-7a are fluted and the top rollers are covered with hard rubber. These rubber covers may be 30-40 per cent shorter on the front than on the rear rollers. All the top rollers are weighted by a weight 36, Fig. 1, through levers 37, 39, 40 and hook 41, or rocking lever 42, arms 43, 44, rods 45, 46, 47 and saddles 48, 49, 50. These saddles are selfadjusting to varying distances between rollers. Specification 674,027 is referred to.