. The principles and processes of cotton yarn manufacture. motion isarrested, and the machine stopped as before. When the cams at the frontare full of sliver, the coiler plate R is raised by the upper pressure of thecotton beneath it. As it rises it raises E, removing the pressure fromE. The end of L then falls with the result noted above. By reference to Figs. 63, 71 and 72, the driving mechanism of thedrawing frame may be seen. The main shaft is near the floor, andextends lengthwise of the machine; when three heads are arranged zig-zag,one main shaft may serve to drive them all. On the spind
. The principles and processes of cotton yarn manufacture. motion isarrested, and the machine stopped as before. When the cams at the frontare full of sliver, the coiler plate R is raised by the upper pressure of thecotton beneath it. As it rises it raises E, removing the pressure fromE. The end of L then falls with the result noted above. By reference to Figs. 63, 71 and 72, the driving mechanism of thedrawing frame may be seen. The main shaft is near the floor, andextends lengthwise of the machine; when three heads are arranged zig-zag,one main shaft may serve to drive them all. On the spindle of the frontroll is a fast pulley C and a loose pulley B. A narrow belt connects withthe pulley A on the main shaft. The back roll receives its power from a DRAWING 99 train of gears starting with a small pinion on the front roll. The changegear for draft is indicated, and will be seen to drive the back roll. Alarger gear therefore increases the speed of the back roll, consequently-decreasing the draft. This will be recalled to be the identical effect. Msin Shaft 60-^ ini 33 A loS— 12 Fig. 71. produced in changing the draft gear on a card. The next to the back andthe next to the front rolls are driven from the back and front, respectively,as shown. The calender rolls and the coiler receive their power from thefront roll. LofC. lOO COTTON YARN MANUFACTURE CALCULATIONS I. Cai, Relating to Draft. A. Total draft is found in the manner previously :—Gears used are taken from Fig. 71. The draft change gear is assumed to have 47 teeth. 60 X 100 X24X^SX2X8 ^ . ~—— total draft. 47 X 24 X 45 X 24 X II B. Intermediate Drafts. I. Draft between back rolls and second set. Exajnple:— 26 X 23 X 9 X 8 28 X 20 X 8 X II 1-25 2. Draft between second and third :— 29 X 28 X 60 X 100 X20X28XIIX 8 33 X 26 X 47 X 24 X 37 X 32 X 8 XII 3. Draft between third set and front rolls. \ Example:— ^ ^2 X ^7x11x8 28 x 20 X 8 x 9 4. Draft between
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Keywords: ., bookauthorwinchest, bookcentury1900, bookdecade1900, bookyear1902
