Cotton weaving: its development, principles, and practice . succeeding theory, and the one which is now invogue, is to saturate the yarn in such a manner thatevery filament shall be bound to its fellows, so as to con-stitute the whole a solid thread. The former served thepurpose of the time in which it was in vogue ; the lattermore perfectly meets the needs of the present day. Theessence of Johnsons invention was to perform this dressingof the yarn, literally putting a coat upon it, by a machinein the manner the hand-loom weaver had done it by hand ;substituting, in fact, a mechanical
Cotton weaving: its development, principles, and practice . succeeding theory, and the one which is now invogue, is to saturate the yarn in such a manner thatevery filament shall be bound to its fellows, so as to con-stitute the whole a solid thread. The former served thepurpose of the time in which it was in vogue ; the lattermore perfectly meets the needs of the present day. Theessence of Johnsons invention was to perform this dressingof the yarn, literally putting a coat upon it, by a machinein the manner the hand-loom weaver had done it by hand ;substituting, in fact, a mechanical for a manual process. Johnson, in his first patent, endeavoured to do this bythe use of circular revolving brushes, but it was soonfound that the result was not nearly so good as that ob-tained from the hand process. The circular brashes weretherefore abandoned, and a system of parallel brushinginvented by him, in which the brushes were traversedin one direction in contact with the yarn, and withdrawnfrom it when being carried back to the point from which. DEVELOPMENT OF THE ART OF DRESSING. 331 a new stroke had to be made. This he accomplished bymeans of a crank-motion now familiar in the mechanicaltrades, and from which the machine ultimately got thename of the crank dressing-machine. The illustration, fig. 176, and its description, will makeJohnsons invention clear. It must first be observed thatthe machine is practically a double one, each part workingto deliver its product to a common centre. The workingparts are attached to or carried upon the oblong frame oscillating brush-frame is marked a, sub-fig. 1, andextends the length of the machine, its pivot being in thecentre. There are a pair of brushes at each end, b b, theupper one arranged to brush the top surface of the warp,and the lower to do the same for the under one. In theirtraverse the brushes operate upon the yarn when movingtowards the ends of the frame. As the brushing was re-quired to be in one direction,
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisheretcet, bookyear1895
