Patent GB-190720574-A (GB)
Title: Improvements in and relating to Shuttle-changing in Weaver's Looms.
Inventor: ZSCHWEIGERT RUDOLF
Filed: 1907-09-16
Granted: 1908-09-16
Abstract: 20,574. Zschweigert, R. Sept. 16. Loom shuttlechanging mechanism; weft, cutting; stop-motions.- When the weft fork b. Fig. 2, is operated by the weft hammer, a cord .f is actuated through l e v e r mechanism c, d, e to pull down an arm or " lifter " k, Fig. 4, against the action of a spring l. The arm k engages with the frame blade m so that, on the beat-up, by means of lever-mechanism i, n, o, p, levers q, q<1>, q<2>, q<3>, Fig. 1, are raised and lift the vertical walls t, u of the shuttle boxes against spring action. The spent shuttle is thrown out of one box by a spring x into a groove y leading to the opposite (magazine) side of the loom. A projection on the arm k meanwhile presses down an arm a<2> through a safety arrangement b<2>, the arm k is released, and the shuttle-box walls t, u are free to drop, the wall t being held raised, however, by spring-controlled pawls d'. The arm a<2> is then acted upon by the stop m, and by means of a toothed segment e<2> and rack f<2>, Fig. 2, a slide g<2> is reciprocated against spring action so as to move a fresh shuttle from a chamber h<2> into the shuttle box. The arm i<2> of the toothed segment actuates a pin m', Figs. 1 and 4, levers l<2>, and tie-rods k<2> so as to withdraw the pawls d<2>, and allow the wall t to fall, and by means of a sloping part t<1> push the shuttle right into the box on the magazine side. Scissors p<2>, Fig. 2, cut off the loose thread, the lower blade being fixed and the upper blade moved up and down bv lever connexion with the breast beam. A plate s<2>, having projections which slide in the grooves t<2> in the shuttle magazine or chamber h', is pushed into the shuttle box when the shuttles are exhausted from the chamber, and its projections prevent the complete descent of the wall t. An arm y<2>, Fig. 7, which is normally kept in an horizontal position by a spring, then remains in position to act on a plate a' and, through lever mechanism, to move the driving-strap on to the loose pulley, an arm z' connected by lever mechanism to the wall t acting on the arm y<2> so as to turn it into inoperative position if the wall t completely descends, while a bracket d' acting from below also places the arm in an inoperative position if the wall is completely raised. By similar mechanism, including arms b<3>, c<3>, Fig. 1, the loom is stopped if the wall u is prevented from falling. In a modification, a fixed storing-chamber o<3>, Fig. 18, is carried by the breast beam ; the shuttles are supported by spring-actuated grips 8<3>, t<3>, which are connected by lever mechanism w<3>, x<3>, y<3> and are withdrawn by means of a sloping plate on the arm n of the box-front lifting-mechanism acting upon an arm v<3>, supports z<3>, a' being projected into position so that only one shuttle is fed into the open-mouthed container p<3> on the lay, from which the shuttles are fed into the shuttle box. An arm projects into a hole in the container p<3>, and is moved by the shuttle therein in such a manner that a lever, connected thereto by lever mechanism, moves a lever similar to the lever y<2>, Fig. 7, into inoperative position. If no shuttle is present in the container, this lever remains in an horizontal position and operates the plate a<3>, thereby stopping the loom. In order to prevent successive changing of shuttles, after breakage of the weft the weft fork is kept out of action for two successive backward and forward motions of the lay. The lever e<3>, Fig. 10, pivoted on the breast beam, is provided with a rod g<3> and a pin f<3>. When the weft-fork slide k<3> moves in the direction of the arrow, the rod g<3> is raised by a bracket h<3>, and the pin f<3> raises the weft fork b out of the path of the weft hammer a. A spring l<3> then springs beneath the lever e<3> and keeps it and the rod g<3> and pin f<3> in their raised positions. During the first return movement of the weft hammer, a projection m<3> removes the spring l<3>, but the return movement of the weft-fork slide k<3> is prevented by the lifting- wire k, which is at this period in engagement with the stop m, and the lever l<3> is able to spring again underneath the lever e<3>. At the next movement of the weft hammer, however, the lifting-wire no longer prevents the return of the weft-fork slide, and the rod g<3> and pin f drop and the lever e<3> returns into a position where the lever l<3> cannot spring underneath it. The weft-fork mechanism then acts in the usual manner.