186 (#248) ############################################ WOOLLEN AND WORSTED SPINNING composed of fibres from 2 in. to 5 in. or from 3 in. to 12 in. in length, the third condition-which is un- doubtedly the correct condition cannot be other than approximated to. A B. 8 8 8 C Fig. 55.- Illustrating Ratching in Worsted Drawing (But here again the art of worsted drawing comes in, and thoughtful experiment will be the dominant factor in the making of the worsted drawing overlooker- or may we not say engineer ? In French drawing-boxes the "ratch" is usually taken to be the distance from the back rollers to the porcupine (see Figs. 62 and 66a). Drawing Twist-In English drawing machinery the slivers are supported between the back and front 186
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100 101 Textile Machine Part
104 104 Textile Machine
87 88 Textile Machine