Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . Figs. 50 and 51. Two part Lay Sword. Fig. 52, another style of sectional pick cam, when cast in theright manner, is a fine cam, but costly when the draughtsman doesnot understand the work it has to perform. There are other mattersof a similar nature that will be explained later. These are essential points to be considered in connection withlooms, and if not carefully considered will result in a loss of pro-duction and a consequen
Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . Figs. 50 and 51. Two part Lay Sword. Fig. 52, another style of sectional pick cam, when cast in theright manner, is a fine cam, but costly when the draughtsman doesnot understand the work it has to perform. There are other mattersof a similar nature that will be explained later. These are essential points to be considered in connection withlooms, and if not carefully considered will result in a loss of pro-duction and a consequent increase in cost of same. Any loom thatis frequently out of repair means a loss caused by its standing, andalso loss of attention that the other looms require; moreover, thecloth produced by such a loom is not up to requirements. Some of the disadvantages attendant upon changing over a loom,from plain goods to a 3-harness twill, which is not fitted with anauxiliary shaft, are here set down. An ordinary plain loom cannotbe changed to weave the twill until an auxiliary or sleeve shaft has 92 been fitted on, and before commencing this all the running partsof the loom must be loosened. A practical man knows what thismeans, and especially if he has ever been troubled with his pickingmotion. Even then most looms are not built with space enoughto allow for the change, the depth of the loom from breast beamto whip roll being insufficient. If an attempt is made to weavesateens the movement of thelay is not sufficient, and thecrank shaft must be one with a larger crank;otherwise, in a sateen cloth of120 picks per inch or more, avery small shuttle will have tobe used or the side ends willbe broken frequently. Thenagain a stronger pick is re-quired to force the shuttleacross the lay before the shedcloses. These objectionablepoints are all prevented by buying looms that are built with the expectation of being changedover to weave any ordinary fancy cloth, even if the
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