In Fig. 60, the two bars A and C could be wrought from the same hooks, and, unless they might be required to be different from each other on another pattern to work on the same loom, it would be unnecessary to allow machinery for the two; either the outer or inner one could be tied up, and the other repeated from it, but the one that is tied up must be painted on the design paper.
Fig. 63 shows the front view of a mounting for weaving a pattern such as that given on Fig. 60, one machine being used for the border, and another for the centre. Usually the border machine would be to the left-hand side, to correspond with the pattern; but in Fig. 63 it will be observed that No. 1 machine is to the right-hand side, and that it works the borders. It does not matter which machine is used for border or centre; the mounter can use the one he considers most suitable for the borders, and the pattern may be painted and the cards cut without any consideration of this, it being only necessary to put the border cards to the border machine, and those for the centre to the centre machine. The only consideration is to avoid any unnecessary slanting of the harness twines, which the present arrangement does; and it also keeps the turned portion of the harness (that for the right-hand border) separate from the twines of the centre, thus avoiding any unnecessary friction.
Cumber boards may be either the exact fineness of the harness, or any set finer; they are better to be a little finer, to allow for any broken rows at the beginning or end of any of the repeats. When the cumber board is finer than the harness, the surplus rows are left idle. A convenient plan of marking off a cumber board is as follows:--Let the pattern be as Fig. 60--that is, with a border at each side and the centre to be repeated several times to make up the width of the cloth. Let 24 cords be required for the selvage, 172 cords for the border, and 128 for a repeat of the centre; there are to be four repeats of the centre. Now mark off on the cumber board whatever width the harness is to stand, which should be the same or rather wider than the warp occupies in the reed, and let it be so as to have the harness in the centre of the loom. Suppose Fig. 64 to give the width of cumber board required. The selvages are wrought from 6 hooks, and there are 8 hooks in each row of a 400 jacquard; therefore 4 rows of the cumber board will be required for each selvage. Mark these off by drawing the lines A and B on the cumber board. Now find out the width the borders are each to occupy, by calculating how wide the yarn will be in the reed, and mark them off by the lines C and G; then mark off the width of each repeat by the lines D, E, and F. Counting the number of holes marked off for the margin, it will be found that there are 32; but as the selvage is on six hooks, the two back holes of each row of the cumber board are marked out, as shown, not being required. The portion marked off for the borders contains 23 rows on each side, whereas only 21-1/2 are required for 172 cords. As the centre repeat is on even rows, and it is usual to leave broken rows to the left-hand side of the painting, the first 4 hooks of the border portion of the machine will be idle; therefore the 4 back holes of the cumber board for both borders are marked out; this still leaves a row too much, which may be marked out at any place. For the repeats, 128 cords, 16 rows are required, and the surplus rows are marked out, as shown. This mounting is supposed to be on a 400 machine, leaving 100 hooks idle to the left-hand side of the mounting, then using 1 row for the selvages, and the remaining 38 rows for the pattern, all but the half of the first row, which is not required.