Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . t gear is advanced by the pin gear, the teeth engage with thoseof the small segment gear, turning it half around, and consequentlythe cam at the end of the shaft Avill be given a half turn, thuslifting the boxes. Actuating the top cam lifts one box, and thebottom cam lifts two, or both together lift three. The small gearbeing turned one-half revolution, the long side of the slide is nownext the segment gear, To pause the box to c
Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . t gear is advanced by the pin gear, the teeth engage with thoseof the small segment gear, turning it half around, and consequentlythe cam at the end of the shaft Avill be given a half turn, thuslifting the boxes. Actuating the top cam lifts one box, and thebottom cam lifts two, or both together lift three. The small gearbeing turned one-half revolution, the long side of the slide is nownext the segment gear, To pause the box to change back again a WEAVING 183 siiiker is brought up under the top lever, allowing the connectingrod to fall, thus drawing the projection on the long slide intoplace, and completmg the revolution of small gear, when the boxeswill return to their normal position. The spring clamp, L, servesthe purpose of a protection device to prevent breakage of boxes orshuttles m case of a shuttle or picker binding in the boxes. Whenthe boxes catch, the stud on the box lever is forced out of connec-tion, and slides up the crank, thus preventmg the lifting rod frombemg Pig. 120. Crompton Gingham Loom. TJming and Fixing of the Motion. To time the motion setthe pin gear with the pin on the bottom center when the crank ison the back center and the shuttles being picked from the boxside; or with the pin on the top center when the crank is on theback center with the shuttle being picked from the smgle box. 197 1S4 WEAVING When this box motion is fitted to some other make of loom, thestud which supports the large segment gear is often below thecenter of the pick cam shaft, m which case the timmg must bechanged to suit requirements. Set the pm on the top center withthe crank shaft on the top center and the shuttle at the box end. Set the head motion driving cams with the small cam on thebottom center, when the crank shaft is just behmd the bottomcenter coming forward, and the shuttle is iii t
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