Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . Fig. 114. Upper Box Motion. (Fig. 116) fixed on the pick cam shaft, one part of which actu-ates, through the connections, the oscillatmg lever on which aremounted the drivmg pawls. A disconnector, which prevents thedriving rod from working when the filling breaks, is actuated bythe smaller part of tlie cam, which also assists in drawing back themotion after a disconnection has taken place. The dwell ofthe larger part of the cam i
Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . Fig. 114. Upper Box Motion. (Fig. 116) fixed on the pick cam shaft, one part of which actu-ates, through the connections, the oscillatmg lever on which aremounted the drivmg pawls. A disconnector, which prevents thedriving rod from working when the filling breaks, is actuated bythe smaller part of tlie cam, which also assists in drawing back themotion after a disconnection has taken place. The dwell ofthe larger part of the cam is one-half a revolution of the pick cam 191 178 WEAVING shaft, equal to a full revolution of the crank shaft, and the smallercam has one-half the dwell of the larger. There are two separateelbow levers, C and D, between which the cams revolve, bothbeing pivoted on the same stud, E, which is attached to the crossrail of the loom. A catch slide, L, is attached to the upper endof the lower elbow lever, D, at F, and the driving rod, G, whichdrives the upper box motion, is attached at the other end. The. Fig 115, Crompton Gingham Loom. upper elbow lever, C, is actuated by the large cam, and carries,fixed on a stud, H, at the elbow, a spring clamp which also grips astud fixed in the upper part of the lower lever, D, at J. As thecams revolve, the large one coming in contact with the upper elbowlever, raises it, and by the combined action of the spring clampand the spring, K, the lower elbow lever is also actuated. Aslotted bar, M, is supported by a bracket fixed to the loom side,and the slide, L, works in the plot o| this bar when the motion is 192 WEAVING 179 in operation. When the filling breaks, the fork-slide draws backand lifts a finger which is also in contact with the slotted bar, M,thns raising the slotted bar so that as the slide is driven forwardthe catch comes in contact with the bottom of the slot, with theresult that further forward movement is prevented, and the studon t
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