The art of weaving, by hand and by power, with an introductory account of its rise and progress in ancient and modern times . upon the bowl 7 ;—that is long enough for the lower shuttle, con-taining coarse laeft, to put in one pick, prior to the Jacquardshedding, and one return p>ick of the same weft after the Jac-quard shedding, when the bowl 7, will immediately ascend, andallow tlie shuttle boxes m, m, to descend by their own gravity ;and thus the upper shuttle is enabled to put in two picks of fine,or coloured weft, before the Jacquard machine comes again into FIGURED WEAVING. 443 operat
The art of weaving, by hand and by power, with an introductory account of its rise and progress in ancient and modern times . upon the bowl 7 ;—that is long enough for the lower shuttle, con-taining coarse laeft, to put in one pick, prior to the Jacquardshedding, and one return p>ick of the same weft after the Jac-quard shedding, when the bowl 7, will immediately ascend, andallow tlie shuttle boxes m, m, to descend by their own gravity ;and thus the upper shuttle is enabled to put in two picks of fine,or coloured weft, before the Jacquard machine comes again into FIGURED WEAVING. 443 operation, and also two picks of fine, or coloured weft, prior tothe next ascent of the shuttle boxes. Fig. The third feature of the improvement comes into operation, inorder to complete the weaving-, or to put in the quilting^ or stitch-ing- threads, by shedding the coloured warps b, and b-;—this isaccompHshed by an improved method of hfting and lowering thegriflf of the Jacquard machine, in order to insure a perfect regu-larity and steadiness of action in moving either upwards or down-wards. For this purpose a spur wheel 12, 12, is attached, to drivethe small pinion 13, (Figs. 212 and 213) keyed upon the shaft 14;and upon the reverse end of this shaft 14, a pair of segments 15,15, having beveled teeth formed, upon one sixth part of theircircumference only, each driving successively, the pinion 16, uponthe small cross shaft 17, (Fig. 214 ;) that is, these segments ofteeth are so arranged, that as soon as the one segment of teeth 15,(Fig. 212) has turned tlie pinion 16, (Fig. 216) one half of a revo-lution in one direction, the other segment of teeth 15, instantlyturns the pinion 16, one
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectweaving, bookyear1844
