Patent GB-190312738-A (GB)
Title: Improvements in and relating to Stop Motions and Reversing Mechanism of Looms for Weaving.
Inventor: HOLLINGWORTH EDWARD
Filed: 1903-06-06
Granted: 1904-04-28
Abstract: 12,738. Hollingworth, E. June 6. Loom stop-motions; picking- motions; change-box motions; shedding- motions; dobbies; reversing-mechanism.-Means are provided, to act in conjunction with a weft stop - motion, for throwing the picking-mechanism and the shedding or dobby and box mechanism out of action on the failure of weft, apart from the stoppage of the loom, and also for turning back the loom to find broken picks &c. When the weft fails, the end 17 of a weft feeler or fork of ordinary construction engages and stops a cam-faced rocking-arm 12, which through a link 13 normally acts on a tumbler-lever 14 pivoted on the lay. The lower end of the tumbler-lever is not raised, and prevents a slide 18 from being moved along the lay to the right, as the lay beats up, by a rod 19 which is pivotally connected to the slide 18 and to a slide 20 on the breast beam. The slide 20 is normally held in a fixed position by a spring, but, when the slide 18 is held, the slide 20 is moved to the left, and a bowl 23 upon it acts upon a pivoted handlever 24. A pivoted lever 36<1> is connected by a link 36 to the lever 24, and is moved thereby, and acts on a shoe 37 to turn the stop-rod 3 and stop the loom in the usual manner. The lower end of the lever 24 rides over an inclined surface 25<1> on one end of a centrally-pivoted lever 25, which is thereby moved and acts through a rod 26 and lever 27 to rock a shaft 28. A finger 29 on the shaft 28 acts on a stud 30 on a lever 31 pivoted on the picking-arm 33, thereby raising the foot of the lever 31 out of engagement with a locking- device 34 fast on the picking-shaft 5, and disconnecting the picking-arm from the picking-shaft, so that the picking-motion ceases to operate, though the lay should over-run itself by reason of the momentum of the loom. The shedding or dobby mechanism and the change-box mechanism are operated from a vertical shaft 11, Fig. 2, to which, by means of clutch members 43, 45, a bevel-wheel 10 may be made fast, so that the shaft 11 is driven through a bevel-wheel 9 and spur-wheels 8, 7 from the crank shaft 6. When the lever 25 is moved, it acts through a link 38, angle-lever 39, and rod 40 to compress springs 41<1>, 42<1> on sliding rods 41, 42. The nose of the rod 41 enters an annular groove 45<11> in the lower fixed clutch member 45, and engages an inclined slot 44<1> in a stud 44 projecting from the upper sliding clutch member 43, so that the stud is forced out of a recess in the bevel-wheel 10. The member 43 is raised, and the rod 42 enters between the clutch members and holds them apart until the loom is restarted. The rod 41 is then withdrawn by a lever and cam. Further rotation of the clutch members and shaft 11 is prevented by suitable stops. A similar hand-operated clutch is described for use when it is not desired to stop the shaft 11 when the weft fails. The means for mechanically reversing the loom one or any number of picks comprise a clutch member 56 loose on the cylinder gear shaft, and provided with a loose sliding stud 57. A rod 55, which is connected by an angle-lever 54, link 53, and lever 52 to a rock-shaft 51, is normally held in an elevated position by a spring 60 to engage a recess in the stud, and hold it in its outward position to force and hold apart a driven pulley 59, also loose on the cylinder gear shaft and forming a sliding clutch member. The shaft 51 is rocked by pressing a hand-lever, and the rod 55 is withdrawn from the recess in the stud, allowing a spring 61 to force the pulley 59 into engagement with the member 56, and place the stud 57 in position to engage a stud on one of the gear wheels of the head motion, which is thereby driven in a reverse direction so long as the hand-lever is pressed. The reversing- mechanism may be applied to any loom of the Hollingworth and Knowles type, or looms of similar construction.