136 (#190) ############################################ WOOLLEN AND WORSTED SPINNING ! - 夏​是​這 ​by an automatic controller dependent upon the tension of the threads. The greatest periodic change has now to be effected. 1. The faller-wire has risen above the tops of the spindles, so that the yarn is curved round the spindle to the tips—is in the spinning position; 2. Shell H must be lifted, thus freeing the carriage from inward drag and steadying of scrolls; 3. The carriage must be started out again by the belt being thrown on to the fast pulley 3; 4. The spindles are once more thrown under the control of the rim shaft A; and 5. The delivery of the yarn is again started. The control of all these motions (saving one) is dependent upon the revolution of the cam shaft, which (a) Lifts shell and places it upon the stop, which later will be withdrawn, following the locking of the faller-wire, in time to effect the running-in; (6) Places the already withdrawn backing-off friction wheel c under the indirect control of the double- speed twist mechanism ; (c) Throws the belt from loose pulley 2 to the fast pulley 3, thus restarting the cycle of move- ments. 2. * * The following special points with reference to woollen mules are worthy of careful consideration :- 1. The pitch and inclination of the spindles are varied according to the quality of work, and consequently count of yarn, being spun. The following are the most usual ; 136
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