. Appletons' universal cyclopáedia;. ning-room the Jxjlibins containing theyarn are taken to the tar-house, where they are placed inframes conveniently arranged with reference to the is a long box filled with tar kept during the operationof tarring at a temperature of 230° P. by means of steam-heaters. The yarns are led from the bobbins in the framethrough two or more guide-plates working in a verticalplane over the tar-box, and convenient for lowering intothe tar; thence to the further end between metal rollers,which press out and return to the box the superfluous tar,on to a lar
. Appletons' universal cyclopáedia;. ning-room the Jxjlibins containing theyarn are taken to the tar-house, where they are placed inframes conveniently arranged with reference to the is a long box filled with tar kept during the operationof tarring at a temperature of 230° P. by means of steam-heaters. The yarns are led from the bobbins in the framethrough two or more guide-plates working in a verticalplane over the tar-box, and convenient for lowering intothe tar; thence to the further end between metal rollers,which press out and return to the box the superfluous tar,on to a large wooden drum to cool them; through fair-leaders, and finally to a fresh set of bobbins, where theyare wound up with the utmost regularity. The bobbinscontaining the tarred yarn go to the laying-ground, wherethey are placed in frames, when the yarns are ready forhauling down, or making into strands. The laying-ground,where the rope is laid up, occupies the entire length of theropewalk. The yarns for the strands, generally three in. Fig. 1.—A twelve-flyer maeliiiiH, for U>rtB, bobbins : C, top and tube ; I), ih-larger sizes ; F, bobbin for smaller sizes. number, are led from the bobbins in the frame throughholes bored on concentric circles in a metallic plate, thencethrough a tube adapted to the size of the .strand, and at-tached to a hook on the end of a spindle in a movable ma-chine like a car, called the former. There are a plate, a tube,and a hook for each strand, and the number of yarns to astrand is regulated by the size of the intended rope. Whenthe machinery is put in motion, the former is drawn downthe walk, and the yarns as they are hauled through thetubes are formed into left-handed strands. Closing thestrands is the step, for which two machines are lower one—the layer—lays up or closes the rope, and ismovable; the upper one, which keeps the jiroper twist inthe strand -while laying, is stationary. Each strand beingsecured to its proper spind
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Keywords: ., bookcentury1900, bookdecade1900, bookidappletonsuni, bookyear1901
