8939. Hattersley & Sons, G., and Perks, T. April 28. Loom stop-motions ; healds and leashes.-In warp stop-motion mechanism in which the healds act as detectors, the metal healds 2 are mounted, in the usual manner, on the cross-bars of the heald frames, and when a warp is broken its heald falls and engages an oscillating bar 8 carried by the heald frame. The bar 8 is of a hollow cylindrical form, and has a logitudinal slot to receive the ends of the healds when these fall. In order that the comparatively weak extremities of the healds may readily stop the oscillatory motion of the bar 8, the latter is oscillated by the longitudinal movement of a sliding piece 9, which has spiral grooves formed in it to receive spiral ridges 8<a> on the bar 8. The piece 9 is moved in one direction by a pivoted lever 10, and in the other direction by a spring 11. Rods 12 are pivotally connected to the levers 10, and rise and fall with the healds, their downward movement being stopped by hoops 12<a> on the rods meeting the then raised ends of levers 13, so that, through the continued downward movement of the healds, movement is given to the levers 10 and sliding pieces 9. The levers 13 are mounted on a shaft carried by arms 15 on a fixed shaft 16, the arms 15 being raised and lowered by suitable connexions from the lay-sword, so that the levers 13 are raised when the lay is in its rearmost position. A spring balances the weight of the parts. If the oscillation of a rod 8 is prevented by a fallen heald 2, movement of the piece 9, of the lever 10, and of the rod 12 is also prevented, and, as the lever 13 is raised, the action of the rod 12 upon its one end causes the other end to rise and act upon a projecting pin on a lever 21. This lever is raised, and through a rod 21<a> causes a lever pivoted on the spring handle 23 to be moved into position to be struck by a bunter on the lay, so that the loom is stopped when the lay beats up. The lever 21 is held in its raised position until the lay beats up, by means of a pivoted ratchet 21<b>. of which the lower end moves over and engages a fixed stud. The ratchet is released, when the lay has been moved forwards, by a rod connected to an arm on the lay-sword. The stop-motion mechanism may be used with cotton healds and jacquard leashes, which are provided at their lower ends with metal pieces to act upon the rod 8. A modification of the mechanism is described, in which the pieces 9 have end extensions acted upon by separate pivoted levers, which are oscillated by connexion with the lay-sword. The pivoted levers are mounted in a similar manner to the levers 13, and when their oscillation is prevented they act through suitable intermediate connexions to place a pivoted lever on the lay in position to knock-off the spring handle. The parts are returned to their normal positions by the action of a latch on the breast beam upon a lever forming part of the intermediate connexions.