. The principles and processes of cotton yarn manufacture. e ribbons then passalong a so-called sliver plate to the lap head of the machine. Duringtheir passage they are comipressed into one sheet by five smooth self-weighted calender rolls, seen in Fig. 75. The sheet is drawn on by twosets of heavy 5-inch calender rolls, seen in Fig. 78. Their duty is, ofcourse, to compress the sheet very tightly, after which it is rolled up intoa compact lap, just as on a sliver lapper. A stop motion is actuated whenthe lap has reached the required size in a manner similar to that on is also^ a
. The principles and processes of cotton yarn manufacture. e ribbons then passalong a so-called sliver plate to the lap head of the machine. Duringtheir passage they are comipressed into one sheet by five smooth self-weighted calender rolls, seen in Fig. 75. The sheet is drawn on by twosets of heavy 5-inch calender rolls, seen in Fig. 78. Their duty is, ofcourse, to compress the sheet very tightly, after which it is rolled up intoa compact lap, just as on a sliver lapper. A stop motion is actuated whenthe lap has reached the required size in a manner similar to that on is also^ a stop motion to ensure the stopping of the machine if a lap no COTTON YARN MANUFACTURE breaks at the back or runs out. This stop motion as used on a Hether-ington lapper is shoAvn in detail in Figs. 76 and JJ. The sheet of cotton,while being pulled on by the back rolls, has sufficient tension to hold thelever p in the position shown in the drawing. The creation of this tensionis aided by the small roll .y under which the sheet passes, p is balanced La-f=. Fig. 76. on a knife edge, and has a small weighted tail piece. Directly beneaththe tail piece Ms a continually revolving three-winged notched wheel is fast on the shaft a, and is driven by gearing in the direction of thearrow. At the other end of the shaft a (Fig. yy) is a toothed clutch c half c has formed upon it a gear and may run loosely around the COMBING III shaft a. g is driven from the end of the machine, and when the chitch cengages with c, it imparts motion to the shaft a. The weighted lever qfulcrnmed at o keeps c in engagement with c by pressing against thecollar /;. The working of the mechanism is as follows: When the sheetat the back breaks, the pressure on p is removed, t then falls into thepath oi 11. t engages with one of the wings of n and stops the shaft gear g^ of course, continues to revolve. But since a is firmly held,,the notches in c must mount upon the teeth in c so that ^ and h are
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Keywords: ., bookcentury1900, bookdecade1900, bookidprinciplespr, bookyear1902
