American School of Correspondence · Chicago, American school of correspondence · leaf 338
5 I COTTON SPINNING 257 changes in speed are made by having a different number of teeth ineither the upper or lower sprocket gear. The binder pulley, T^,which is carried by an arm, V*, is for taking up the slack of the chainwhen necessary. To change the draft, various combinations are used. In… … TWIST GEAR y / 7DRUM STUD GEAR DRUM GEAR- Fig. 220. Diagram of Twist Gearing. teeth are shown. These may be changed to twenty and sixty-fourteeth or thirty and one hundred four teeth. The back roll gear shown has fifty-six teeth but it is also suppliedwith fifty, fifty-four or fifty-five teeth. The…
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