276 (#362) ############################################ WOOLLEN AND WORSTED SPINNING a The same principle will hold good for a set of boxes, excepting that intermediate speeds must not be taken into account, the number of spindles being varied according to the sliver speeds of the first and the last boxes, even if several boxes come in between these. In the two following lists the delivery sliver speeds for lustre and cross-bred open sets of drawing are given. List IX : 32's TO 40's LUSTRE: PREPARED AND COMBED Dia. of Revs. Yds Box. Fr. Ri. per min. per min. 3' Double-headed Can Gill-box . 2 Spindle Gill-box Drawing-box Drawing-box Finishing-box Roving-box 82 90 70 62 50 40 21.5 23:5 36.6 32.5 26.2 21 6" List X: 44's TO 50's CROSS-END: CARDED AND COMBED Dia. of Revs. * Yds. Box Fr. Ri. per min. per min. Double-headed Can Gill-box 95 20.6 2 Spindle Gill-box IIO 24 Drawing-box 85 37 Drawing-box 72 31.4 Finishing-box бо Reducing-box Roving-box 16.6 NN outon 26 20 46 38 The above particulars show that the effects of sliver speed vary very much in any set. Thus between the can gill-box and the roving-box in the lustre set there is practically no difference, while between the can gill- box and the first drawing-box there is a very marked difference. The latter boxes in each set show the re- duction in "sliver speed delivery” to harmonise with the spindle speed-hence the present tendency to build lighter flyer or even ring roving-boxes. Note the effect of " twist control" on the size of the front rollers. 276
96 98 Textile Machine
101 102 Textile Machine
103 103 Textile Machine
104 104 Textile Machine
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141 143 Textile Machine
147 148 Textile Machine
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154 154 Textile Machine
157 157 Textile Machine
160 160 Textile Machine
210 210 Textile Machine
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187 188 Textile Machine
191 191 Textile Machine
204 206 Textile Machine