. The principles and processes of cotton yarn manufacture. irectly from the cylinder bya crossed belt. A pulley on the other end of the licker-in transmits to apulley just beneath the doffer. On the shaft with this pulley, which can beclearly seen at D in Fig. 32 in dotted lines, is a small pinion meshing witha large gear wheel on the doffer shaft. The small pinion just mentioned 74 COTTON YARN MANUFACTURE is called the doffer change gear. From the large gear on the doffer,power is transmitted by the train shown in Fig. 57 to the card calenderrolls. Between the shaft of the lower calender roll
. The principles and processes of cotton yarn manufacture. irectly from the cylinder bya crossed belt. A pulley on the other end of the licker-in transmits to apulley just beneath the doffer. On the shaft with this pulley, which can beclearly seen at D in Fig. 32 in dotted lines, is a small pinion meshing witha large gear wheel on the doffer shaft. The small pinion just mentioned 74 COTTON YARN MANUFACTURE is called the doffer change gear. From the large gear on the doffer,power is transmitted by the train shown in Fig. 57 to the card calenderrolls. Between the shaft of the lower calender roll and the coiler, theconnection may be seen in Fig. 40. On the opposite end of the doffershaft to the large doffer wheel, a bevel gear called the doffer bevel transmits power to what is called the side shaft bevel. On the end ofthe side shaft near the feed roll a small bevel gear called the draft changegear drives a large plate bevel on the end of the feed roll. The laproll receives its power from the other end of the feed roll by the train ofgears Fig. 55. There are in all this driving mechanism two gears which can be andare changed. One, the draft gear, changes the relation between thesurface speed of the delivering roll and the surface speed of the feedingroll, or in other words the draft. This gear is marked in the drawing,and the effect of changing it will readily be understood. If a draft gearbe replaced by a larger one, evidently the feed roll and lap roll will runfaster, while the speed of the delivering roll will remain the same. Morecotton will be fed to the machine within the same length of time; henceless drawing will take place. The draft is therefore decreased by the CARDING /D substitution of a larger gear for the one in use. The opposite is of coursetrue if a smaller gear be used. If a lap of the same weight per 3ard beused in both cases, with a large gear, the weight per 3ard of the sliverdelivered b}- the card will be greater than if a smaller gear were
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Keywords: ., bookauthorwinchest, bookcentury1900, bookdecade1900, bookyear1902
