A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . the pistons are brought into contact with the ends of the electro-magnets, they are seized by such of them as are in an active state, and on moving the frameforward, those are retained while the others are carried back with it, and, by means of asimple mechanical arrangement, become fixed in their places; thus there is in front of theframe a plate, with holes, which are only open where the pistons have been withdrawn, andthis plate, as will be readily understood
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . the pistons are brought into contact with the ends of the electro-magnets, they are seized by such of them as are in an active state, and on moving the frameforward, those are retained while the others are carried back with it, and, by means of asimple mechanical arrangement, become fixed in their places; thus there is in front of theframe a plate, with holes, which are only open where the pistons have been withdrawn, andthis plate, as will be readily understood, acts the part of the Jacquard card, and is suitablefor receiving the steel needles which govern the hooks of the Jacquard in connection withthe warp threads as ordinarily used. The ordinary Jacquard cards are shown in the following wood-cut, fifj. 687. Instead of this arrangement, which will be understood by reference to the article Jac-quard, M. Bonelli, as we have said, instead of the cards prepares his design on metal foil,in a resinous ink, which serves to uiterrupt the current, and thus effect the object of the Fi(]s. 687 and 688 explain generally the arrangements by which the process is effected. A,/^f. 688, represents the plate pierced with holes, which j)Iays the part of the card. Each of the small pistons or rods i, forming the armatures of the electro-magnets r, has a small head, r/, affixed to the end, exactly opposite the needles c,fi(U 687, of the Jacquard, and are capable of passing freely through the holes of the plate a, /f^. 688. At a given Vol. III.—69 L 1090 WEAVING BY ELECTRICITY. moment the plate is slightly lowered, which prevents the heads of the pistons passing, andthe surface of the plate then represents a plain card. The pistons are sujjported on a frame,//, which allows them to move horizontally in the direction of their length. At eachstroke of the shuttle, the frame, carrying with it a plate, a, has, by means of the treadle,a reciproc
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
