. Textile raw materials and their conversion into yarns : (the study of the raw materials and the technology of the spinning process) a text-book for textile, trade and higher technical schools, as also for self-instruction ; based upon the ordinary syllabus and curriculum of the Imperial and Royal Austrian weaving schools. in, of Verviers (Fig. 245). The Ring Frame. The double frame illustrated in the drawing has a row of120 to 240 spindles mounted on each side and operates in thefollowing manner :— The slow feed rollers, a, b, draw the sliver, c, from thebobbin, e, which rests on the unwindi
. Textile raw materials and their conversion into yarns : (the study of the raw materials and the technology of the spinning process) a text-book for textile, trade and higher technical schools, as also for self-instruction ; based upon the ordinary syllabus and curriculum of the Imperial and Royal Austrian weaving schools. in, of Verviers (Fig. 245). The Ring Frame. The double frame illustrated in the drawing has a row of120 to 240 spindles mounted on each side and operates in thefollowing manner :— The slow feed rollers, a, b, draw the sliver, c, from thebobbin, e, which rests on the unwinding roller, d, the neces-sary draft (ten fold at most) being produced by the drawingrollers,/, g. Since, however, the distance—18 to 28 inches—between the two sets of rollers far exceeds the average length?of the wool fibres, this draft would be impossible to effectwere it not that a simultaneous temporary twist is given tothe thread by means of a tube, h, which is driven at a speedof about 2,500 revolutions per minute by a cord, i, passingover a driving cylinder, k. This temporary twist is afterwardssuperseded by the permanent twist imparted by the ringspindle to which the attenuated thread arrives after passingthrough the guide, /, mounted on the hinged rail, in. Here TEXTILE RAW MATERIALS. 38] c / \ -^h ;^. wmmfjm^^mm^^maw^ss^m^mmi&f^PmmuR Fig. 245.—Double Ring-spinning Frame (vertical section). 382 TEXTILE RAW MATERIALS. the thread first passes through a hght steel loop known asthe traveller, n, and thence to the bobbin, 0. This latter isa simple wooden tube carried round by a projecting stud, q,on the revolving spindle,/), which is mounted vertically in thebolster bearing, r, on the bolster rail, ,s, and in a footstep bear-ing, t, on the footstep rail, u, and receives motion through thewharve, v, driven by a plaited cotton band, .v, from the tinroller, ic. Owing, however, to the high rate of speed—7,000and more revolutions per minute—this simple form of spindlei
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttextile, bookyear1901
