192 (#254) ############################################ CHAPTER VII WORSTED DRAWING MACHINES—THE CLOTHING OF BASIC PRINCIPLES The mechanical clothing of the principles dealt with must now be carefully considered. There are four distinct types of machines employed in the conversion of the comparatively thick "top into the comparatively thin and level “ roving," from which the worsted spinner may produce a fine, level thread. These are- 1. The gill-box (Figs. 56 and 57); 2. The open drawing-box; 3. The cone drawing-box (Fig. 61); and 4. The French drawing-box (Figs. 62, 63, 66 and 66a). Under extraordinary circumstances it may be necessary to employ combinations of these machines. For example, a set of French drawing-boxes treating open slivers may culminate in a cone roving-box pre- paring slivers for spinning on the cap, ring or flyer frames. Under these circumstances it will be necessary to introduce into the cone roving-box a control ” for the control of the untwisted fibres between back and front rollers. Cases such as this, however, are so rarely to be met with, and are so readily solved in view of sound knowledge of the principles already dealt with that they do not here call for further com- ment or treatment. porcupine- 192
5 7 Textile Machine
64 64 Textile Machine
71 72 Textile Machine
75 76 Textile Machine
82 83 Textile Machine
117 118 Textile Machine
142 143 Textile Machine
129 130 Textile Machine
199 199 Textile Machine
157 158 Textile Machine Part