B. Using Two Machines and a Comber-Board Having Equal Sections
Sometimes two or more machines are employed in producing fabrics having two systems of warps; each machine working on its own system. In this manner Fig. LVI. is executed, representing a straight-through tie-up arranged for two Jacquard machines, S and H, in which the warp is drawn in the Jacquard harness as follows: one end from machine S, one end from machine H. For explanation two 100 Jacquard machines are used for the purpose of simplifying the arrangements of laying out and threading the comber-board. A larger Jacquard machine for the illustrations would require more leashes, and the explanation would be more difficult.
The comber-board, a, b, c, d, is divided into two equal parts, S and H. Each part containing the harness-cord for one machine only. The drawing of the tie-up is arranged for two divisions, and also readily explains any tie-up for more divisions.
The leasing of the Jacquard harness, K, is arranged (as illustrated in the drawing by leash-rods p and r) to commence as follows:
1st end: harness-cord fastened to No. 1 needle of machine, S; 2d end to No. 1º needle of machine, H; 3d end to No. 2 needle of machine, S; 4th end to No. 2º needle of machine, H; 5th end to No. 3 needle of machine, S; 6th end to No. 3º needle of machine, H; 7th end to No. 4 needle of machine, S; 8th end to No. 4º needle of machine, H.
These eight ends, forming the first complete row of the comber-board, will use the first row of both machines; the second row of the comber-board will use the second row of both machines; and so on, until every row of the comber-board, with corresponding row of the Jacquard machine, is taken up. In the drawing we have indicated, as usual, besides the first row, the last row of the machine and the comber-board; or, in other words, we show the threading of
Warp end 193: harness-cord fastened to No. 97 needle of harness S.
Warp end 194: harness-cord fastened to No. 97º needle of harness H.
Warp end 195: harness-cord fastened to No. 98 needle of harness S.
Warp end 196: harness-cord fastened to No. 98º needle of harness H.
Warp end 197: harness-cord fastened to No. 99 needle of harness S.
Warp end 198: harness-cord fastened to No. 99º needle of harness H.
Warp end 199: harness-cord fastened to No. 100 needle of harness S.
Warp end 200: harness-cord fastened to No. 100º needle of harness H.
This method of using two Jacquard machines, on the principle explained, is employed on Jacquard looms for dressgoods figured with an extra warp, on upholstery goods, and similar textile fabrics.
Fig. LVII. shows a fabric design for a curtain, to be executed on the straight-through tie-up in two sections.