258 (#336) ############################################ WOOLLEN AND WORSTED SPINNING illustrated in its latest form. As designed in Fig. 74a it was found to interfere with the lustre of English and Worsted yarns; but it is claimed that the special construction shown in Fig. 74b overcomes this defect. In Fig. 75 Newsholme's Cap doffer is illustrated as being typical of the “rail spindle doffing " type. If these two main types are to be further modified it may be expected that such modifications will take the line of - (a) Mechanical doffer design being dominant, the whole spinning frame being designed to fit the doffer, and not, as in the present types, the doffer being fitted to the frame ; (b) True automatic doffing, which will probably only become possible when (a) is much further advanced than at present. Up to the present, continuous doffing either of spindles or rails has not been found satisfactory, but the idea should not be entirely ruled out: there may be possibilities for this in true automatic doffing. THE OUTPUT OF SPINNING FRAMES.- This matter has already claimed attention in Chapter IV; here only the two matters of doffing and cleaning time, and waste, call for comment. In worsted spinning, doffing and cleaning time call for a reduction from the theoretical production of a frame of from 5 per cent. to 10 per cent. The method of charting the theoretical production and the necessary deductions is worthy of careful study ; there are other methods than those illustrated in Chapter IV. The waste allowance will be markedly affected according to whether the roving is being spun out to its limit or not. This also should be charted,” and be incorporated in the final chart dealing with spinning- room production. 258
94 95 Textile Machine
101 101 Textile Machine
110 110 Textile Machine
48 50 Textile Machine
87 88 Textile Machine
115 115 Textile Machine
144 144 Textile Machine Part
146 146 Textile Machine Part
174 175 Textile Machine