. The principles and processes of cotton yarn manufacture. the shaft of the top or driven coneis a worm, driving a worm gear H on the feed roll. By tracing the con-nection just outlined, it can be seen that an upward or downward move-ment of the sectional feed plate causes an increased or a decreased speedof the feed roll A. Of course the speed of the feed roll determines theamounc of cotton fed to the machine. If a thick place in the lap passes PREPARATORY PROCESSES AND MACHINES 29 between the feed roll and the feed plate, the section of the feed plateover which it passes will be immediately
. The principles and processes of cotton yarn manufacture. the shaft of the top or driven coneis a worm, driving a worm gear H on the feed roll. By tracing the con-nection just outlined, it can be seen that an upward or downward move-ment of the sectional feed plate causes an increased or a decreased speedof the feed roll A. Of course the speed of the feed roll determines theamounc of cotton fed to the machine. If a thick place in the lap passes PREPARATORY PROCESSES AND MACHINES 29 between the feed roll and the feed plate, the section of the feed plateover which it passes will be immediately depressed. The connection ofchains and levers will move the belt along the cones so that the feed rollwill be decreased in speed just sufficiently to compensate for the thickplace which has passed. If a thin place passes through, the oppositeeffect is produced, the speed of the feed roll increasing. Of course notone, but generally all of the sections of the feed plate are moving at thesame time, some up, some down. Each exerts its influence on the lever. Fig. 24. E, but often the action of some counteracts the action of others, so thatonly the resultant effect influences the speed of the feed roll. No evener isperfect, since for every thick place there must follow a corresponding thinplace. Hence there is much necessity of having the communication ofthe motion as nearly instantaneous as possible. The more sensitive theevener, the better the result. The importance of producing even lapsmakes the evener an especially important part of the lapper. Another style of evener is shown in Fig. 24. In this case levers doall the work, no chains at all being used. The claim of the maker of 30 COTTON YARN MANUFACTURE this type is that it surpasses any where cords or chains are used, sincelevers are more sensitive in their action, owing to the tendency of chainsand cords to stretch ; while the claim for the other style is an increasedsensitiveness owing to the dependence upon circular motion
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Keywords: ., bookauthorwinchest, bookcentury1900, bookdecade1900, bookyear1902
