Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . the lever, E, andconsequently lowers the upper end, allowmg the pawl, G, to engagewith the ratchet. A, thus turning the disc until the finger agamenters an indentation. Then the slide, D, drops, allowing the 190 WEAVING 177 pawl, H, to engage with the filUng cham ratchet which continuesto turn until another multiplying riser comes up on the chain. To change the value of the multiplier a ratchet of a differentnumber of teeth is su
Weaving; a practical guide to the mechanical construction, operation, and care of weaving machinery, and all details of the mechanical processes involved in weaving . the lever, E, andconsequently lowers the upper end, allowmg the pawl, G, to engagewith the ratchet. A, thus turning the disc until the finger agamenters an indentation. Then the slide, D, drops, allowing the 190 WEAVING 177 pawl, H, to engage with the filUng cham ratchet which continuesto turn until another multiplying riser comes up on the chain. To change the value of the multiplier a ratchet of a differentnumber of teeth is substituted. Each tooth has the value of twopicks, but owmg to the disc having two indentations the value ofthe multiplier is half the number of teeth in the ratchet. The valueof a multiplier may readily be doubled by attaching a piece of tmto the disc so as to cover up one indentation, when its value willbecome double the whole number of teeth. The disc multiplier isan exceptionally good mechanism as it is simple, positive m action,and has no links to get out of order, thereby requiring very littlefixmg. The upper box motion is operated through a double cam, A,. 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 lev
Size: 1970px × 1268px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectweaving
