Cotton weaving: its development, principles, and practice . xact correspondence. These movements by elevatingand depressing the shafts of healds every time a changetakes place, form a shed in the warp for the passage ofthe shuttle. When the cycle of changes has been gonethrough, the design has been completed, and the opera-tions begin anew. This goes on as long as desired. The risers and sinkers fitted upon the plates operatethe treadles in a positive manner. The treadles carryanti-friction bowls to ease the passage of the risers andsinkers. They transmit their motion through connecting-rods o
Cotton weaving: its development, principles, and practice . xact correspondence. These movements by elevatingand depressing the shafts of healds every time a changetakes place, form a shed in the warp for the passage ofthe shuttle. When the cycle of changes has been gonethrough, the design has been completed, and the opera-tions begin anew. This goes on as long as desired. The risers and sinkers fitted upon the plates operatethe treadles in a positive manner. The treadles carryanti-friction bowls to ease the passage of the risers andsinkers. They transmit their motion through connecting-rods or cords to the levers, which raise and lower thehealds in the manner already shown. THE DEVELOPMENT OF THE SHEDDING MOTION. 183 This treading motion can be and is commonly used toweave fabrics requiring up to twelve shafts, and by vary-ing the arrangement of the risers and sinkers upon theplates a considerable variety of patterns can be is, however, a very cumbrous motion to work, takinga considerable time to pull to pieces and to put together. Fig. 120.—Fustian Loom with Woodcroft tappets. again for re-arrangement, whilst if a mistake happens tobe made in the work it is all to do over again. The task,besides stopping the loom for a considerable time whilechanges are made, is also a dirty one. When at work itis also slow and exceedingly noisy, adding very greatlyto the inevitable clatter of a weaving-shed. Thus ithas been dispensed with wherever possible, and is now 184 COTTON WEAVING. retained only for cords, moleskins, heavy velveteens, belt-webbing, hose-pipes, and kindred classes of fabrics. On the line chosen, namely, that of development from thelower to the higher capacity of the shedding power of theloom, we now come, though somewhat ont of time and place,to the draw-loom. A brief notice must suffice as it has dis-appeared from practical work, superseded by the jacquard. Persons familiar with the history of weaving knowthat for the production of decorated f
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