Fig. 43.
[Fig. 43] illustrates the side elevation. [Fig. 44] illustrates the front elevation. The construction of this machine and its working are as follows:
Over the prisms, B, C, D, of the same size and shape as a cylinder of the Jacquard machine, run three endless chains. Surrounded by this endless chain is the shuttle-box, E, with three shuttles, one of which is illustrated in [Fig. 45]. On each of these shuttles a toothed rod, K, is fastened, the teeth of which work in the circles, H, H, as soon as a shuttle is put in its lay, J. This toothed rod, which runs underneath the circles, H, is used to move the shuttles to and fro. L indicates the pulleys for driving the machine. M´ and O, O´, the gear-wheels; Q, the lever, and P, its guide, connected as shown. The bent needles, Z, work in connection with the shuttles, E. These needles are tubes through which the twine for lacing from spools, A, are passed. These tubes are adjusted to rod, S, which swings around pin, T, and gets its motion from rod, U, V, W.
Fig. 44.
The Jacquard cards are placed on the machine at B´, and move in rotation under needle, Z. The movement of the cards must be so regulated that, notwithstanding the want of uniformity in the arrangement of the holes, each hole in turn must come directly under the lacing needles.
The lacing of the cards is produced as follows: After the cards have moved one hole, the needles, Z, lower to P´, [Fig. 43], making the shed. The shuttles move with their points under the thread thus lowered by the needle, and pass clear through the loop. After the needles rise, they will in turn tighten the loop, the shuttles return to their original position, and the work repeats.
This method of lacing Jacquard cards has the disadvantage of compelling the machine to be stopped oftener than if using the two-needle system ([Fig. 32]), as the shuttles will only hold a small quantity of lacing twine.