Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . nother. Fig. 11 shows two formsof expansion oombs with varying numbers of dents to the inch. Beam Drive. The beam is driven by friction, that is, it restson a driving drum, which is generally twelve or eighteen inches indimeter, ^wing to the beam being ^lus f^^-^J^-placed on it at a constant speed, no matter whether it is a laige 23 16 WARP PREPARATION. or small beam. If the drum is 36 inches in circumference, forinstance, and is
Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . nother. Fig. 11 shows two formsof expansion oombs with varying numbers of dents to the inch. Beam Drive. The beam is driven by friction, that is, it restson a driving drum, which is generally twelve or eighteen inches indimeter, ^wing to the beam being ^lus f^^-^J^-placed on it at a constant speed, no matter whether it is a laige 23 16 WARP PREPARATION. or small beam. If the drum is 36 inches in circumference, forinstance, and is driven at a constant speed, it will take just as longfor the drum to turn an empty beam the distance of 36 inches asit would to turn the distance of 36 inches on a full beam. Sothat if the beam when it is full of yarn measures 3 yards in cir-cumference, it will take three times as long to turn the full beamas it did to turn the empty beam, when it was 36 inches in cir-cumference. While the yarn does not travel faster as the beamincreases in size, the spools on the creel travel faster as the yarnis taken off the spool; consequently there is a greater strain on. Fig. 12. the yarn when there is less quantity on the sx^ool. This oftencauses the yarn to break, which is detrimental to good weaving,inasmuch as knots in the warp 3^arn increase the amount ofdefective cloth. Cone Drive. To overcome the difficulty of increased strain-,the cone drive (shown in Fig. 12) has been added to the warper;this regulates the speed of the drum, so that as the warp increasesin size and the spools decrease in size, the speed of the drum can 24 WARP PREPARATION. 17 be reduced. Thougli the drum travels slower at this time, themachine can travel faster when the spools are full. It is claimed tliat by the use of the cone drive there is addedproduction and better quality of warp yarn, because added tensionnot only breaks the yarn, but takes the elasticity from it. Theloss of elasticity is a great defect.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectweaving
