Scott's Practical Cotton Spinner, and Manufacturer; The Managers', Overlookers', and Mechanics' Companion. Being a Comprehensive System of Calculations of Mill Geering and Machinery ... with the Recent Improvements in Machinery. to Which Are Added Compendi (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1851 Excerpt: ...N.B.--When the number of grains which any given, length weighs, is taken instead of the hank, multiply the grains by the change wheel, or pinion you intend putting on, and divide by the change wheel you have working, and the quotient will be the weight in grains required. The following will be the dividends for any number of leas, from 1 to 7 leas, or 1 hank. N. B.--For as many leas that you weigh, take as many thousands for your dividend, as shewn in the annexed table of dividends. What will 2 leas of 22 hank roving, or yarn weigh? Hank roving, or yarn, 22,5)2000,0(88,888 grs., or 3 dwts, 16,88 grs. 1800 2000 1800 For Yarn Tables from No. 1 to 300, and from 1 to 1 leas, and 10 hanks in length, see Tables published by Robert Scott. SELF-ACTING MULES. The following calculations are taken from Messrs. Sharp and Roberts's self acting mule; the merits of which, with the recent improvements, are already known amongst the most extensive cotton spinners, not only in this country but in most others where the cotton spinning business has been introduced. The speed of the twist shaft is required from the following particulars? Revolutions of lying shaft per minute, 136. Diameter of drum on shaft, 21 inches. Diameter of pulley on counter shaft, 14 inches. Diameter of drum on counter shaft, 16 inches. Diameter of pulleys on twist shaft, 12 inches. 136 revolutions of lying shaft per minute. 21 inches, diameter of drum on do. 136 272 2856 16 inches, uiameter of drum on counter shaft. 17136 2856 45696 dividend. 14 inches, diameter of pulley on counter shaft. 12 inches, diameter of pulleys on twist shaft. 168 divisor. 168)45696(272 revolutions of twist shaft per min 336 1209 1176 336 336 N.B.--The self-acting mules from which these calculations are made are spinning ...