Cotton weaving: its development, principles, and practice . trands will receive all thetensile strain, whilst the envelope or shield will bear allthe wear and tear of the frictional contact of the ropewith the grooves of the pulley. The core threads arearranged in the best possible manner for developing a farhigher degree of tensile strength than has ever been attainedbefore, and with the least injury to the component mate-rial. The envelope, being relieved of all strain, much more c c 386 COTTON WEAVING. effectually resists frictional wear. The combination ofstrand and cover gives the maximum
Cotton weaving: its development, principles, and practice . trands will receive all thetensile strain, whilst the envelope or shield will bear allthe wear and tear of the frictional contact of the ropewith the grooves of the pulley. The core threads arearranged in the best possible manner for developing a farhigher degree of tensile strength than has ever been attainedbefore, and with the least injury to the component mate-rial. The envelope, being relieved of all strain, much more c c 386 COTTON WEAVING. effectually resists frictional wear. The combination ofstrand and cover gives the maximum of durability,strength, and flexibility yet attained in ropes for thispurpose. This construction is extremely well suited for trans-mitting power. As it hardly stretches at all in workafter being put on the pulley, its great flexibility enablesit to bend easily to its work in passing round the peri-phery of the pulley, and to straighten out again whencoming from it. Hopes constructed on the ordinarymethod tend to pulverize and soon break from this cause,. Fig. 199.—The Lambeth Driving Rope. owing to the bending backward and forward destroyingthe cohesion of the particles of the fibrous material ofwhich they are composed. In some recent tests itrequired a weight of 13,260 lb. to break a rope of 1±- With a strain of 1,775 lb. the same ropestretched only 280 per cent. The general working loadof such a rope is much less than this. The durability ofropes are of course considerably affected by the condi-tions and circumstances in which they work. There areinstances cf this rope having been in constant use overten years, and which still appear to be as good as whenfirst installed. A COTTON MANUFACTURING ESTABLISHMENT. 387 CHAPTER XII. Miscellaneous Matters in the Equipment and Organi-zation of a Cotton Manufacturing Establishment. An East Lancashire cotton manufacturing establishment selectedas typical of the trade.—Classification of cotton goods.—A selectionfor o
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