Patent GB-190600353-A (GB)
Title: Improvements in or connected with Apparatus for Testing Yarn.
Inventor: MOSCROP JOHN
Filed: 1906-01-05
Granted: 1906-11-22
Abstract: 353. Moscrop, J. Jan. 5. Yarns and t h r e a d s, testing; reeling - machines; stop-motions ; al a r m s. - The object is to combine a wrap reel with a lea tester so as to enable a lea or a number of strands of yarn to be wound and tested without being removed from the machine. The yarn is wound upon a flat reel d, Fig. 2, which is mounted on slides b but can be clamped in the position shown for winding purposes. A number of sets or leas to be tested are wound side by side on the reel and the bars 11 of the latter are made U-shaped as shown, so that any set or lea can be gripped by pairs of sliding grippers j, one of which is connected with a suitable tension indicating apparatus, while the slide g of the other is connected by rack-and-pinion mechanism with a shaft m<1>, which may be operated by a handle or by means of a belt pulley k which is connected with the shaft through a clutch. Several arrangemencs of grippers are described. When the slide g has been moved outwards sufficiently, it operates a stop rod for disengaging the driving-clutch. In winding the yarn on the reel, the yarn passes from bobbins d' through guides 2 on a bar 1, which is traversed to ensure the regular winding of the yarn, by means of ratchet and screw or cam mechanism operated from the shaft c of the reel. In the arrangement shown in Fig. 2, the traverse bar 1 and also an alarm bell 6 are actuated from the rocking lever 4 operated from the shaft c, the ratchet-wheel 8 being rotated intermittently and operating at each revolution the hammer of the bell to indicate that a sufficient number of coils have been wound. In the machine shown in Fig. 4, the reel axle is mounted in a fixed position in the frame, and is provided at its ends with rollers upon which the yarn is wound. One of these rollers is held by springs in open slots in the arms of the reel and can be withdrawn therefrom for the purpose of stretching the yarn on the reel. This stretching is accomplished by engaging the axle of the movable roller by a hook 16 on a slide 15, which is mounted on the carriage 14 operated by rack-and-pinion and other gearing, the slide 15 being connected with the carriage 14 by a chain or cord 21 passing over pulleys 22 and under a jockey pulley 23 connected with a weighted lever 28, so that as the carriage 14 is drawn 'to the right and the pulley 23 is raised, the tension on the yarn is increased. During the stretching-operation, the reel is held in the horizontal position by a spring catch. Fig. 7 shows the mechanism for automatically disconnecting the driving-clutch when the lea being tested breaks. The slide 15 cirries a pawl 19, which, when the lea breaks and the slide is moved forcibly to the right by the action of the weight 26, engages a pivoted rack -20 on the carriage 14 and depresses it so that a tooth 50 on its lower side engages with a second rack 51 connected with the spring rod 54 which holds the starting-handle in the engaged position. The elongation or stretch:and the strength of the yarn are indicated by two pencils or markers 31, attached respectively to the framework and to the carriage 14, and operating on a recording-sheet 29 attached to the slide 15. For the purpose of automatically stopping the winding when a sufficient number of coils have been wound on the reel. the threads are passed between pairs of disks 78, Fig. 10, mounted loosely on a shaft 73 which carries also loose separating-washers 77 and a fixed washer 81. The shaft can slide in bearings in the frame and may be forced to the left by a spring 75, for the purpose of clamping the disks together, or be held by a catch 76, 83 in its extreme position to the right when the disks run loose on the shaft. During the winding operation, the shaft 73 is held by the catch 76, 82, so that the disks are loose, until a weighted lever 70, whichis raised during the winding operation by a cam 68 operated from the reel shaft, pulls and releases the shaft 73 so that the yarns are clamped between the disks 78 and broken. The machine may be constructed without the yarn - stretching apparatus, the yarn being wound on the wrap reel and subsequently tested on an ordinary testing-machine.