Patent GB-190323460-A (GB)
Title: Improvements in or relating to Multiple Embroidering Machines.
Inventor: FARMER CHARLES
Filed: 1903-10-29
Granted: 1904-09-01
Abstract: 23,460. Farmer, C. Oct. 29. Embroidery machines ; multiple-needle machines ; needle-holders ; needle-driving. - A multiple-shuttle embroidery machine is constructed so that some of the needles can be thrown out of action for changing purposes and is provided with a separate tension device for each needle thread to admit of this being done. The needle - bars A', Fig. 2, which carry needles A, are arranged horizontally and parallel to one another, sliding in guides B. The underside of each bar has recesses A', A<3>. The recess A' is entered by a bar D which passes under all the needle-bars and slides transversely to them in guides D'. The guides D' are reciprocated by plungers D<2> in a direction parallel with the needlebars. To enable some of the latter to be thrown out of action, the top of the bar D has gaps cut in it of varying length so that, by moving the bar longitudinally, certain needle-bars come over the gaps and are not moved. The recess A<3> is entered by a bar E which has gaps corresponding inversely to those in the bar D, and slides parallel to the latter in fixed g u id e s. The ridges on the bar E thus lock those needle - bars which are released by the gaps on the bar D. To enable the bars D, E to be moved together longitudinally, the cam which actuates the plungers D<2> is recessed so that at the end of the inward travel of the plungers, the bar D may be moved to place a pin D<5> on it in a recess in the bar E. The bar E is then moved by a pinion which gears with a rack on the bar end, the rack having holes at intervals along its length by which it may be locked by a pin at any desired point. Governing needle thread.-A device for holding the threads of those needle-bars which are put out of action consists of a spring A<4> attached to each, to grip the thread against the top of the guide B when the bar is drawn back. Each needle thread is led from a cop T, between a pair of locking-discs H<3>, Figs. 1 and 2, these discs being situated on one side of a stationary bracket H and one such pair of discs provided for each thread. The thread is then passed over a bar K capable of rocking on a shaft K<2>, the bar being common to all the threads. From the bar K the threads pass between their respective locking-discs H<4> on the other side of the bracket H and thence over an oscillating feed-bar L and vibrating tension-bar N to the needles. The locking-discs are pressed together by springs H<5>, Fig. 1, two of which are arranged between consecutive brackets H and abut against opposite sides of an arm J' on a bar J. The bar J reciprocates longitudinally, thereby causing the springs to press alternately on the discs H<3>, H<4>. When the thread is locked by tension between the discs H<4>, the bar K is moved backwards by a cam to draw thread off the cop between discs H<3>. On the return movement of the bar J the thread is locked between discs H<3> and the oscillatory feed bar L pulls enough thread for a stitch between the discs H<4>, the bar K being pulled forward during this process against the action of a weight or brake.