Patent GB-277671-A (GB)
Title: Improvements relating to warping and beaming machines for yarns
IPC: D02H13/00
Filed: 1927-09-14
Abstract: 277,671. Oettli, E. Sept. 15, 1926, [Convention date]. Yarns, warping and beaming; tensioning yarns in warp form.-The threads 34 pass to the warping beam from rotatably-mounted bobbins through a guiding-comb 46 over rollers 26, 27, 29, 28 over a gauge roller 24, which can be bralced, and under tensioning-rollers 38, 37, 32, 33 supported in vertical guides 36, 35, 30, 31 by the threads. The rollers 32, 33 descend in their guides in the usual manner to take up slack in case the warping beam should be turned backwards, whilst after the machine has been stopped and the gauge-roller braked, the rollers 37, 38 descend so as to take up slack and tension the threads given off by the bobbins, which still rotate for a time. The usual weighted starting and stopping treadle 3 is connected bv a link 5 to a sector 7 rockable on a pivot 6 and having a slot 9 engaging a pin 10 on a forked lever 12 adjustably connected to a brake block 16. The lever 12 is also connected by a spring 42 to a lever 41<11> connected to. a lever 41, which normally extends into the path of the roller 37. When the machine is stopped, automatically or otherwise, the treadle 3 is actuated and the sector 7 rocked counterclockwise to the position shown in Fig. 2, the lever 12 is drawn downwards and the brake applied to the gauge-roller 24, slack accumulating between this and the warping-beam being taken up by the descent of the rollers 32, 33. The lower limb of the lever 12 rocks the lever 41" and the lever 41 is withdrawn from the path of the roller 37, which descends along with the roller 38 to take up slack from the rotating bobbins. The falling roller 38 engages an arm 56 and turns a shaft 55 carrying a cam 57, which engages and rocks a lever 53 pivoted at 52, so as to withdraw a lug 54 from the position in which it supports the arm 45<1> of a tensioning-lever 451, 45. This lever then swings into the position shown in Fig. 2, engaging and tensioning the threads 34, and preventing them from entangling with one another. A weighted lever 61 has a stop 65, which, in the position shown in Fig. 2, bears against the rear wall of the lever 53, thus tending to assist the action of the roller 38. The weight 64 of the lever is pivoted and can be moved into the position shown in Fig. 5, in which the edge 6 of the stop 65 engages with the locking-arm 45<1> of the tensioning-lever 45<1>, 45, thus maintaining this in its position of rest. This is used when the machine is stopped for cleaning the comb or replenishing the bobbins with the warping beam warped. An elbowshaped lifting-bar 67 can be swung into the position shown in Fig. 5 to push the threads against the upper end of the comb, so as to render all the parts of the latter accessible for cleaning. When the machine is restarted by moving the treadle in a clockwise direction, the upper end of the limb 19<1> of a bell-crank lever 19 pivoted on the sector 7 and controlled by a leaf spring 20 enters the slot 22 of an abutment 23 furnished with a notch 69, side lugs 21 preventing the lever 19, 19<1> and sector 7 from falling back into the position shown in Fig. 2, so that the machine can be driven at slow speed. When the treadle is moved upwards still further to change from slow speed to full speed, the side lugs 21 leave the guide, so that the lever 19, 19<1> can tip into the position shown in Fig. 1, the sector 7 engaging a striker 51 on a road 48 connected to a lever 47 and bringing the lever 45, 45<1> into its original position shown in Fig. 1, and the brake is removed from the gauge-roller.