Patent GB-279463-A (GB)
IPC: D03D45/20
Filed: 1927-10-19
Abstract: 279,463. Laforet, J. Oct. 19, 1926. [Convention date]. Shuttles, changing bobbins in, automatically.- Relates to cop changing mechanism of the kind provided with a vertical swinging weft magazine and having means for preventing operation of the transferrer if the shuttle should be improperly boxed, and consists in means whereby the transferrer is operated by the engagement, of the lay with the magazine, or with the magazine and a U-shaped lever, during the forward movement of the lay. The magazine 4, Fig. 1, pivoted at 6 to a support 2 is normally held against the influence of a spring 26 against a buffer 31 by a bellcrank lever 27, 28 connected by a lever or wire 30 with the weft feeler or weft stop-motion. Upon call for weft-replenishment, the lever 27. 28 is released and allows the magazine to move into the position shown, and an arm 60 is thereby released and allows a spring-actuated shuttle-feeler 25 to turn into the position shown in full lines, a link 35 connected to the feeler 25 and to a spring- controlled bent lever 48 allowing the end 49 of the bent lever to come in the path of a roller 50 on the lay 5. The lever 48 is pivoted on a lever 38 and is held, during replenishment, against a stop 40 on the lever 38 by a spring 52. If the shuttle is not properly boxed, the feeler 25 is engaged by a shuttle and causes the end 49 of the lever 48 to be moved into inoperative position above the roller 50 on the lay. The lever 38 is pivoted at 32 and is connected by a spring give-way device with an arm 33 having an inclined part 35 adapted to engage with a roller 36 on a spring-retracted slide 10 or plunger mounted on the magazine and carrying an arm 13 to which the transferrer 14 is pivoted. The transferrer is held in the correct position for engaging the cop 16 by a spring 18. When the shuttle is properly boxed, the end 49 of the lever 48 is engaged by the roller 50, and the lever system 48, 33 is turned to cause the operation of the transferrer, the lay acting on the lower part of the magazine. During the downward motion of the slide 10, a rod 22 carried thereby moves to separate the cops, and a rod 21 moves into a hook 23 on the lay to lock the lay and magazine during replenishment on the forward movement of the lay, the parts remaining locked until after the lay has moved half-way on its backward stroke. The lever 27, 28 is then operated to move the magazine into its vertical position against the buffer 31, and the engagement of the magazine with the projection 60 on the shuttle feeler causes the end 49 of the lever 48 to be moved above the roller 50 on the lay. Means may be provided for causing the loom to be stopped after the shuttle-feeler has caused replenishment to be delayed three times in succession. In a modification, the U-shaped lever system 33, 38. 48 is replaced by levers 61, 62, Fig. 2, pivoted on the support 2 and connected by a give-way link 66, 67, an arm 69 controlled by the weft-feeler, or by the weft stop-motion being adapted to cause the levers to engage with the rollers 36, 50 on the slide 10 and lay 5. In another modification, a bell-crank lever of which the arms 70, 71, Fig. 3, are connected by a giveway device, has an incline 35 for engaging the roller 36, the other arm 31 having an incline 49 adapted to be engaged by a roller 72 on an arm 8 on the rod 9 of the weft-feeler or weft stopmotion, a notch 73 causing the bell-crank lever to be held in the position shown in full lines until replenishment has been effected. In a modification of the shuttle-feeler device, the shuttle-feeler 25, Fig. 4, is linked to a lever 74 having a roller 56 engaging an incline 57 on the lever 48.