Patent GB-190625668-A (GB)
Title: Improvements in Certain Machinery or Apparatus for Forming Yarns or Threads into Warps and like Assemblages of Yarns or Threads
Inventor: KERSHAW GRINDROD
Filed: 1906-11-14
Granted: 1907-08-01
Abstract: 25,668. Kershaw, G. Nov. 14. Yarns, warping. -In a machine for forming warps or like assemblages of yarn according to the Scotch system of horizontal warping, in which the yarns are wound in successive sections or plies on a swift with an horizontal axis, adjustable apparatus is provided for stopping the machine when each section has been wound. The invention is described as applied to a machine having a carriage d, which is movable on guides in a direction parallel to the axis of the swift, and is provided with a measuring-roller c, a pressing-roller, and guiderollers k, l, under and over which the yarns pass to the swift. A shaft i, which may be made fast or loose, is mounted in the carriage d, and is provided with a hand-wheel f and a worm-wheel h in gear with a screw rotated by the driving-mechanism of the machine. When the yarns are being wound on to the swift, the shaft i is made fast and the rotating screw acts upon the wheel h to traverse the carriage in the direction indicated by the arrow C. When a section has been wound, the rotation of the screw is stopped, the shaft i is made loose, and by means of the wheel f the carriage is moved back into the proper position for the commencement of another section. The machine is also provided with electro-magnetic stop-motion mechanism, whereby when an end breaks or fails an energized electro-magnet q attracts armatures on a bell-crank lever n, so that the horizontal arm of the lever frees a weighted lever to stop the machine. In a machine of the type described, a weighted lever s is pivoted on a stud in a bracket secured to the carriage d, and is provided with a curved surface t. A rod w is arranged to slide in holes in the frame a of the machine, and lies between the curved surface t and a bracket x secured to the carriage. A peg 3 on a bracket secured to the rod w projects through a slot in a part 5 of a lever 6, which is pivoted on a fixed bracket 8. A chain y provided with a weight 1 is connected to the rod w, so that, before the winding is commenced, the peg 3 is drawn to the left end of the slot and a projection 9 on the part 5 rests against the frame a. When the winding of the first section is commenced, the carriage d moves in the direction of the arrow C and the lever s moves in the direction of the arrow F, so that the rod w is gripped between the surface t and the bracket x. The surface t and the rcd may be faced with leather or may be provided with teeth to facilitate the gripping. The rod w moves with the carriage, and the peg 3 moves along the slot in the part 5. When the proper length of yarn for the first section has been wound, as indicated by a counter or otherwise, the machine is stopped by the stopping-handle, and a bracket 1U is moved along the part 5 until the point of a screw 11 touches the peg. The bracket is then fixed to the part 5 by a bolt 13 passing through the slot, and the screw 11 is turned, so that the part 5 and the lever 6 are pressed back until the end of the lever 6 has moved. the bell-crank lever n sufficiently far to free the weighted lever of the stop-motion. The screw 11 is then fixed by a lock-nut 12. The carriage d is moved back by means of the hand-wheel f into the position for the commencement of the second section, and the rod w moves with the carriage until the peg 3 has reached the end of the slot and the projection 9 bears against the frame a. Further movement of the carriage causes the lever s to release the rod w. When the machine is started again, the rod w is immediately gripped, and the winding proceeds until the peg 3 strikes the screw 11, whereupon the lever 6 acts on the lever n and the machine is stopped. The carriage d will then have moved through approximately the same distance as in the winding of the first section, and any necessary adjustment of the screw 11 may be made before or after the machine is stopped. The carriage may then be moved back for the winding of the third section, and no further adjustment of the bracket 10 and the screw 11 is necessary. In other forms of machine, the gripping- device may be mounted on any suitable moving part.