Patent GB-190411888-A (GB)
Title: Improvements in and connected with Automatically Replenishing Weft in Looms for Weaving
Inventor: DUCKWORTH JOHN
Filed: 1904-05-25
Granted: 1905-05-18
Abstract: 11,888. Duckworth, J., Eddleston, J., and Whalley, C. May 25. Looms, changing bobbins and the like in, automatically; stop-motions; shuttte boxes.-Relates to improvements in the cop-changing mechanism described in Specification No. 2709, A.D. 1903, and consists, firstly, in a feeler motion for preventing the cop from being pressed out of the magazine until the shuttle is in proper position to receive it. Referring to Fig. 1, which illustrates the prior invention, the lever q, band v, and enlargement on the check strap f<3> are in the present invention dispensed with. The bracket ux is fixed permanently to the lay, and the upper end of the lever h is shortened so as not to engage with the rod d<3>, Figs. 1 and 2, which is retained sufficiently free in the bracket d<x> that its opposite end d<4>, projecting towards the shuttle, may be raised and lowered slightly. The end d', usually held up by a spring d<7>, is, when the weft breaks and the cop magazine swings towards the lay, pressed down by a bracket c' mounting the projection d<6>, and enters a hole in the shuttle guide or box w, Fig. 6, and also a corresponding hole in the shuttle, if the latter is correctly boxed, so that the bracket d may remain in position and effect a change of cops in the shuttle, as described in the prior Specification. If the shuttle is not properly boxed, the end d<4> is held by the shuttle, and is pressed against a spring c<10>. On the movement of the lay, the end d<4> raises a spring d' and permits the bracket d to be moved backwards, so that no cop is pressed out. Secondly, the loom is stopped if the weft fails to thread up or breaks during the insertion of a cop. The catches m, m<x>. Figs. 4 and 5, operated through the weft fork and ordinary fork lever k to rock the lever p and cause a cop to be fed forwards when the weft breaks or is exhausted, are connected to a lever m<1> fastened to a weighted cord passing round the take-up roller l or a rod m' bent to engage internally with ratchet-teeth on a wheel m<3> placed at the end of the take-up roller. When a cop has been inserted, and the rod p has returned to its initial position, the friction of the weighted cord, or the ratchet end of the lever m<2> which slips over a few teeth, acting on the lever m<1> raises the catches m, m<x> free of the ordinary fork lever. If, therefore, the loom knocks off twice in short succession, the first breakage of thread only causes the feed of a fresh cop. An auxiliary fork lever k<1>, having a catch or notch k<2>, Fig. 4, at its front edge for holding the loom handle when the loom is running, is pivoted to the back of and rests on the ordinary fork lever, its other end being connected by a bar k<4> to the upper end of the lever p. On the second breakage of thread, the lever k<1> only is engaged by the catches m, m<x>, leaving the lever k free to draw out and knock the loom handle off the notch k<2> so that the loom is stopped, a spring preventing movement of the lever p. After a few picks, the take-up roller winds up the weighted cord or allows the lever m<2> to slip back, so that the catches m, m<x> fall and the ordinary fork lever is put into action. To prevent the shuttle from rebounding or vibrating in the shuttle box, a leather &c. pad x, Fig. 6, is fitted on to a lever x<1> attached by a set-screw &c. to a rocking shaft x<2>, held up by a spring x<3> and cranked so as to come under the bar connecting the lay-sword to the driving-shaft crank, the rotation of which causes the pad to enter the shuttle box and form a wedge for the shoulder of the shuttle and thus to retain the latter firmly. The pad is withdrawn to release the shuttle, when it has to be ejected from the box.