Patent GB-119925-A (GB)
Title: Improvements in or relating to Automatic Looms.
Inventor: WADE HAROLD
IPC: D03D45/20
Filed: 1917-10-29
Abstract: 119,925. Wade, H., (Hopedale Manufacturing Co.). Oct. 29, 1917. Shuttles, changing bobbins &c. in, automatically; checking picking-sticks.-The bobbin magavine or hopper is advanced step by step when bobbins are absent from the place of transfer, whether the transferrer is actuated or not, and means are provided for locking the magazine after each advancement through the space of one bobbin. When the usual shaft 1, Fig. 3, is rocked by the weft-detector, an arm 4 thereon is moved forwards, and a spring 44, connected to a pin 45 on an adjustable extension plate 46 on the arm, moves a lever 43, 41 pivoted on the transferrer stud 33, the inclined end of a projection on the plate 46 normally bearing against a boss on the end of the lever 43. The shuttle feeler 50, Fig. 10, is pivoted at 52 to the. magazine plate 5, and has an arm 53 adjustably connected by a link 56 to the lever 43, so that the feeler is swung rearwards, and, if it strikes the improperly-placed shuttle, the spring 44 extends and the lever 43, 41 is not turned. If, however, the shuttle is properly boxed, the latch 36, pivoted on the arm 35 of the transferrer, is raised by a pin 38 thereon being engaged in a slot 40 in the lever 41, and the lay bunter 37 strikes the latch and actuates the transferrer arm 31, which has a head 30 and an arm 117 for engaging the butt and the tip of the bobbin 85. The magazine) is rotated step by step by a ratchet-wheel 62, Fig. 7, on the butt-end plate 63 and a feed-pawl 60 with a tooth 61 to engage the ratchet-wheel. The pawl 60 has an opening 66 engaged by the end of an arm 67 of an operating-lever 70, which is pivoted at 71 to the plate 5 and has an arm 72 carrying at its end a pivoted feed-latch 73. When the latch 73 is in its raised position, it is struck by the bunter 37. and the pawl 60 is depressed against the action of a spring 80. When the bunter 37 moves backwards with the lay, the pawl 60 rises and advances the magazine one step, and a stop-lug 82 on the arm 67 engages the advancing wall of one of the butt-recesses 83, as shown, and prevents further advancement of the magazine, the contact of the next bobbin 85 with the abutment 84 not being relied upon to stop the magazine. If the next bobbin space in the magazine is empty, the lever 72 is swung rearwards as the pawl 60 rises, and an arm 76 on the latch engages a face 77 on the abutment stand 78 and causes the latch 73 to be raised again into the path of the bunter 37, so that the pawl 60 is again depressed. If then a bobbin 85 makes contact with the abutment 84, forward movement of the magazine is prevented and the pawl 60 remains in its depressed or set position when the bunter 37 retires, the latch 73 dropping to the position shown in dotted lines. When the latch 36 is raised for weft-replenishment, a pin 86 thereon lifts the latch 73 to be struck by the bunter 37, but the advancement of the magazine takes place only when the transferrer rises so that the next bobbin does not impinge upon the transferrer head. A stop-pawl 90 with a tooth 91 for engaging the ratchet-wheel 62 is pivoted on the hub 86<1> of the lever 70, and the pawls 60, 90 have hand-pieces 65, 92 to enable the operative to withdraw them from the ratchetwheel to turn the magazine by hand, stop-pieces 64, 93 being provided on the pawls to engage the inner edge of the ratchet-wheel and prevent the pawls from being withdrawn too far. The butts of the bobbins are inserted in the recesses 83 in the rotary plate 63 within the lip 110 of the magazine plate 5, and a support 112, yieldable against the action of a spring in the block 114, forms a continuation of the lip 110 and with the abutment 84 supports the bobbin that is in the transfer position. The tips of the bobbins are supported by grooved projections 106, Fig. 2, on springs 105 held within radial slots 104 in a rotary disk 100 by three abutments, which span the slots, and pins 107 engaging holes in the springs. An arm 20 is secured to the end of the transferrer stud 33 and a rod 123 passes freely through a hole in the end of the arm 120 and is held yieldingly towards the lay and under the shuttle box by a spring 124. When bobbin-transfer takes place, the tip of the ejected bobbin hits the rod 123 and is momentarily held in such a position that it prevents the tip of the inserted bobbin from being depressed beyond a point from which it will spring back into proper position in the shuttle. The rod 123 yields if struck by, say, the picking-stick P. The weft-replenishing mechanism is applicable to plain looms, and for this purpose a bracket 11, Fig. 10, is bolted to the breast beam B in such a manner that it is adjustable horizontally in both directions and has a plate 7 slidable vertically in a recessed bracket 6 on the magazine 5 and adjustable by means of a screw 13, bolts 12, and a lock-nut on the screw securing the parts in their adjusted position, all as described in U.S.A. Specification 1,142,725. A picking-stick check 17, Fig. 2, with a leather face 20 is adjustably secured to a support 16 by a bolt 21 passing through an inclined slot 22 in the support, the check being adjusted to ensure the proper position of the shuttle in the box at the replenishing side of the loom.