# Facts and Figures for Textile Manufacturers; Concerning the Proper Methods of Equipping and Running Mills ...

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 edition. Excerpt: ...by the product of the draught and hank roving, and subtract the quotient from 1. Exawple: Suppose No. 28.5 yarn is being spun from 4-hank roving, with a draught of 7.26. 7.26 4:29.04. 28.5-: -29.4=0.98, which subtracted from 1.00 leaves.02, or two per cent=the contraction in length. To find the loss of twist in spinning: By the "loss of twist" is meant the amount the actual twist is less than that found by computing from the speed of the spindle. Rule: Divide I by the circumference of the bobbin in inches. Exawple: Suppose a filling bobbin is 1% inches in circumference at the barrel. l--: -l.5=0.67=loss there. If it is 3 inches in circumference at theoutside the loss there=l--: -3=0.33. Average loss from computed twist 0.50, or half a turn per inch. The best way to find the actual speed of spz'ndles: Make some mark on the end of the cylinder so an assistant can turn it by hand slowly just once around. Mark the heads of several bobbins, or mark the whirls of the spindles, so as to be able to count the average numbcr of turns of the spindle to one turn of the cylinder. Then multiply this number by the revolutions per minute the cylinder makes, ascertained carefully with a good speed-counter; or attach revolving-shaft of a speedcounter to tip of spindle with a rubber tube. The result obtained by either of these methods is nearer the actual speed of the spindle than the result obtained from computation in the usual way, because of the differences due to the size of the banding and the angle of the groove in the whirl. To find the Length of yarn in a b0bbin: --Multiply the circumference of the front roll in inches by the number of revolutions per minute, and this product by the number of minutes required to fill the bobbin; divide by...show more

## Product details

• Paperback | 62 pages
• 189 x 246 x 3mm | 127g
• United States
• English
• black & white illustrations
• 1236760948
• 9781236760944