Patent GB-191507835-A (GB)
Title: Improvements in or relating to Traverse or Builder Mechanism for Forming Cops, or Yarn or Thread Packages, applicable to Ring Spinning and Twisting Frames and to Winding or similar Machines.
Inventor: JUSTICE PHILIP MIDDLETON
IPC: D01H1/36
Filed: 1915-05-26
Abstract: 7835. Justice, P. M., [Lanning, J. K.]. May 26. Building - motions; winding-machines.- In a building-motion, particularly described with reference to ring frames, but applicable to winding and similar machines producing cops wound in conical layers, the traverse or chase, and the " gain " or shifting of the traverse, are controlled by variably deflecting the builder chain or similar flexible element, which is attached to an oscillating arm having a constant stroke and passes over deflecting - pulleys, which are movable on such arm so as to increase or decrease the deflexion of the chain &c., and thus in effect take it up or let it off. The traverse is constantly increased, preferably throughout the whole formation of the cop, and the gain is increased throughout the base, but may not be subsequently increased. The cop has thus a decreasing taper of chase from nose to base, and the bottom coil of each successive layer lies safely above that of the layer next beneath, a formation which tends to check increase of ballooning, prevent sloughing, and secure uniformity of tension, in unwinding in a shuttle &c., and is also stated to lessen difficulties in spinning in a ring frame using a bobbin or tube without a prepared base or even a bare spindle. The gain may be abruptly increased after forming a short portion of the base having a short traverse to serve as a feeler bunch. In the form shown in Figs. 2 and 3, the oscillating arm or builder lever 8 is arranged longitudinally of the ring frame and is given a constant stroke by a cam acting on the bowl 10 on an adjustable extension arm 9 to which a pair of builder chains 11 are attached. The cam is preferably given a higher speed than usual and gives three double strokes per revolution, effecting a more or less open wind, which may be more open during the up-stroke of the ring rail than during the down-stroke. Each chain passes over pulleys 36, which are gradually moved outwards on the arm 26 of the lever 8, being carried on a nut 35 traversed on a screw 32 by mechanism comprising a pawl 24 and ratchet-wheel 25, the disk 23 carrying the pawl being operated from the arm 26 through a lever 18 pivoted to the frame at 17, toothed segment 19 thereon, and pinion 20. The open-slotted end of the lever 18 is adjustably connected by a pin 30<1> to a slotted extension 27 of the arm 26. The action of the pawl is controlled by a shield 31, the preferred arrangement being such as to cause the progressive movement to occur at or near the end of the upward lift of the ring rail, and thus increase the speed of traverse at the nose of the cop. The effect of the arrangement in increasing the traverse and gain is shown in the diagram, Fig. 17, in which at A to E are indicated successive equi-distant positions of the nut, and at a to e corresponding positions of the end of the chain 11, which is attached to a bell-crank lever for operating the lifting- pokers. The traverse is increased by the increase of the arc in which the nut moves, and the gain, represented by the movement of the end of the chain from a to e is, as shown, imparted by progressively increasing steps. This progressive increase, in transmission to the poker, is augmented during the formation of the cop base by arranging that the arm of the bell-crank which operates the poker is as usual initially inclined downwards and moves towards the horizontal position during this period. The bottom position of the ring rail is adjusted by providing the nut with a screw stop 37, which is brought on to a shoulder of the arm 26 at the commencement of each set of cops, preferably by means of a crank-handle 39. To give additional gain in order to provide a feeler bunch or for other reasons, the chains may be further deflected by a pair of pulleys 42 carried by a lever 39' pivoted at 40 to the arm 26. The inner face of the lever is suitably cam-shaped, as by forming a bevelled shoulder thereon, to bear against the nut 35 and thus control the lever and determine the consequent deflexion cf the chain. To terminate the increase of taper of the cop, additional adjustable bowls or pulleys 45 may be fixed on the arm 26, so as to bear upon the upper side of the chains after the nut 35 has been moved outwards a determined distance. In the arrangement shown, the engagement of the chains with the pulleys 45 also abruptly increases the gain. In the form shown in Figs. 18 and 20, which is readily applicable to existing frames, the builder lever 112 is arranged transversely of the ring frame and receives a constant stroke from the cam 102. The chain is attached at a fixed point 115 and passes over a pulley 119, which is progressively moved along the screw 117 by ratchet mechanism, the action of which is regulated by adjusting stop-nuts on a sliding bolt which actuates the pawl. As the pulley 119 is moved outwards from the fulcrum 111, the angle of the chain at the pulley becomes less and less acute, and the effective length of the chain is gradually increased. The chain passes over a fixed guide-pulley 120 and is attached at the end to a curved extension 128 of the arm 126 of a counterweighted bell-crank lever, the other arm 124 of which actuates the poker 113. The bell-crank thus receives an oscillation of gradually increasing amplitude, and its arcs of movement constantly advance in a clockwise direction, but by steps which gradually diminish. Other features of the arrangement, however, are such as to produce from this movement a progressively increasing gain, at least during the formation of the cop base. Thus, at the commencement of the building, the arm 124 is at its lowest position, and the gradual shifting of its position towards the horizontal tends to give an increasing incremental advance to the ring rail, as in the arrangement described above. As the arm rises above the horizontal, the incremental advance of the ring rail becomes less, if, as shown in Fig. 18, the curve of the extension 128, is an arc struck from the axis of the bell-crank. The curve, however, may, in modifications, be varied to modify the gain imparted. It may have a flattened part to compensate for the decrease of gain just referred to, or a part of increased radius by which this decrease of gain may be further decreased. Fig. 24 shows means of varying the amount of chain let off by the movement of the pulley 119. The part 114 of the chain extending between the pulleys 119, 120 is substantially vertical at the commencement of the building and suffers little change in length ; the part extending to the hook 150 is, however, greatly changed during the building, and by fixing the hook in different positions along the extension 149, the amount of such change may be altered. By this arrangement, for a given let-off necessary to give the total gain required to complete a cop, the pulley 179 can be moved a greater distance, and thus a greater increase of traverse can be obtained between the beginning and the end of the building operation. In a further modification, the guide-pulley 120 may be dispensed with, the chain being led direct from the pulley 119 to a drum or disk mounted on the axis of the poker-actuating lever.