GB367370A - Improvements in machines for spinning artificial silk or like artificial fibres - Google Patents

Abstract

367,370. Bobbin - winding mechanism of artificial silk and like spinning-machines. SOC. ANON. SNIA VISCOSA SOC. NAZIONALE INDUSTRIA APPLICAZIONI VISCOSA, 15, Via Alfieri, Turin, Italy. Nov. 15, 1930, No. 34446. Convention date, Oct. 18. [Class 120 (ii).] In machines for spinning artificial silk or the like of the kind wherein means are provided for automatically changing the bobbins, for automatically reducing the speed of the bobbins to maintain a constant winding speed, and for automatically reducing the length of the traverse to wind bobbins with conical ends, a single pair of cones is used for driving the bobbins and for reciprocating the guides, each cone in turn being the driving cone. A shaft driven from the cones actuates the bobbins and the traverse mechanism whereby a constant ratio is maintained between the speed of the bobbins and the number of strokes of the traverse guide. The means for moving the bobbin holders to present fresh bobbins for winding is arranged to move adjacent devices at slightly different times, whereby the holders and consequently the spinning-nozzles may be set closer together. The traverse is automatically restored to its maximum value simultaneously with the commencement of the winding of fresh bobbins. The general arrangement of the machine is shown in Fig. 1. The main shaft 2 is provided with a bevel wheel 3 fast with a wheel 5 geared to a wheel 6 loose on the shaft 23 of the top cone 21, which also carries a loose wheel 7 geared to a wheel 8 on a shaft 9 which drives the bobbins and the traverse mechanism. The wheel 8 gears with a wheel 10 loose on a shaft 11 carrying a wheel 12 geared by means of bevels on a vertical shaft 13 with the lower cone 20. Sliding dog-clutches 16, 17 are adapted to couple the shafts 11, 23 with the wheels 5 or 10, and 6 or 7 according to the position of a lever 25, which is maintained in position by latches 18 controlled by the belt fork of the cone gear. According to the gearing of the clutches the top or the bottom cone is the driving-cone. As shown, the bottom cone is driven through the clutch 16, wheel 12, and the gearing on the shaft 13, and drives the top cone from which the shaft 9 is driven through the clutch 17 and wheels 7, 8 ; the reverse drive is through the wheels 5, 6, clutch 17 to the top cone, and from the bottom cone through the vertical shaft 13, wheel 12, clutch 16, and wheel 10 to the shaft 9. The belt fork is traversed by a screw 45 driven in one direction or the other by a bevel wheel 44 through reversible and adjustable ratchet-andpawl mechanism and change gearing 29 from the shaft 26 which drives the pumps. The reversal is effected by the belt fork which engages stops 58 on a bar 57 and initially compresses one or the other of two springs 59, 60, and subsequently engages a dog stop 47 with a corresponding stop 16 fast on the screw. The consequent rotation of the stop 47 releases the latch 18 and allows the charged spring to move the lever 25 to reverse the clutches, and a further lever fast with the lever 25 reverses the ratchet mechanism interposed between the gearing 29 and the bevel wheel 44. The lever 25, by means of a lever 79 engages a clutch 75, constantly driven by a wheel 71 from the wheel 6, whereby a wheel 76 is rotated through one revolution and by means of gears 87 rotates the bobbin carriers to remove a full bobbin from the operative position and to bring the empty bobbin into operation. The odd carriers are rotated by one shaft and the even by another, the gears 87 being arranged so that one moves slightly before the other. The traverse mechanism is operated from the shaft 9 which drives the spindles and comprises a cam 103 which oscillates a slotted lever 109 on a shaft 110 connected to the thread guides, the block 108 which engages the lever 109 being moved vertically in a frame 104 reciprocated by the cam to reduce the traverse as the bobbin grows. The block 108 is carried by a rod 106 connected to levers 126 on shafts rotated by a wheel 124 on a shaft 123, which is operated by a sector 122 and gearing controlled by a cam 120 driven by worm gearing from a shaft 100 which also carries a gear for actuating the traverse cam. The worm-gearing driving the cam 120 is disconnected by a lever actuated by a cam on a shaft which controls the rotation of the bobbin carriers, and the cam is returned to its initial position by a spring, and the sector 122 operated to move the block 108 into the position for imparting the maximum traverse.