Patent GB-190702915-A (GB)
Title: Improvements in Shuttle Changing Mechanism for Looms
Inventor: COSSERAT OSCAR
Filed: 1907-02-05
Granted: 1907-07-18
Abstract: 2915. Cosserat, O. Feb. 5. Loom shuttle-changing mechanism; brake mechanism ; stopping and starting mechanism; stop-motions ; shuttle boxes; picking-mechanism.-In an automatic loom of the type in which the weaving operations are suspended while the change of shuttle is effected, a shaft is rocked when the swift fails, and an arm 6, Fig. 6, thereon moves a lever 7, which is pivoted on the breast beam. The lever 7 moves the shipper-lever 1 from its detent 4, and a spring 8 acts upon a projection on a pivoted lever 10, which is thereby moved out of the path of the shipper-lever and allows the latter to be moved by a spring to the end of its slot 11. The belt shifter is thereby caused to shift the driving-belt off the usual fast pulley, over the usual loose pulley, and partly on to a second loose pulley, which is thereby driven, and through chain-gearing drives a cam shaft. An arm on the shipper-lever acts upon a pivoted lever, which causes a band brake to be applied to the flywheel. When the shipper-lever is removed from its detent by hand or by stop-motion mechanism, its movement is stopped by the lever 10, so that the belt is not moved past the usual loose pulley, and the loom is stopped. The lever 10 may be pinned to the breast beam in its normal position, so that the loom is stopped when the weft fails. One shuttle box 33, Fig. 9, is supported on two parallel rods 30, which are guided on the lay and are connected by a cross-bar. A pivoted lever is raised by a cam on the above-mentioned cam shaft, and acts upon the cross-bar to raise the box 33 to the level of the shuttle magazine 35, 36, which is pivoted on a rod 31. The rising box 33 contacts with a guide, which moves the magazine into line with the box, the empty shuttle 48 being in line with a full shuttle 37. In an under-pick loom, the picker remains on the lay when the box 33 rises, so that the box is open at both ends. A driver 38 is attached to a guided cord 41, which is pulled by a bell-crank lever oscillated by a cam on the cam shaft, the driver being also attached to a ribbon 43 wound on a spring-barrel 44. A rod 46 is fixed to the driver and has an attached finger 47, which, when the cord 41 is pulled, removes the shuttle 48 from the box, the driver moving the full shuttle 37 into the box. The ribbon 43 supports the other shuttles in the magazine to allow the driver to return. When the mechanism is applied to an overpick loom, the foot of the picker is engaged by a slotted guide, which is pivoted on the picking- spindle and is connected to an arm on a rock-shaft mounted on the shuttle box. When the box rises, a crank-arm on the rock-shaft strikes a projection on the magazine, so that the shaft is rocked, and the foot of the picker is raised by the slotted guide, to allow the empty shuttle to be ejected from the box. If the shuttle box is empty, it is prevented from rising by the engagement of a hook on the swell with a catch on the lay. The shuttle box is normally held down by a hook, which is pivoted on one of the rods 30 and engages a fixed catch ; the lever, which raises the box, acts on an arm on the hook to remove the latter from the catch against the action of a spring, when the box is required to rise. When the change of shuttle is effected, a projection on a disk on the cam shaft oscillates a pivoted lever, which acts upon an arm of the shipper-lever to move the latter into engagement with its detent, so that the belt is shifted on to the fast pulley, the brake is released, and the weaving recommences. The lever, which re-sets the shipperlever, is provided with a stop, which co-operates with the projection on the disks on the cam shaft to stop the latter when it has made one revolution.