Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . bed un-der fur lint manufacture, is largely usedfor this purpose. A special machine hashowever been devised, which is illustra-ted in Fig. 2314. This apparatus has aformer of peculiar shape. The rib-which support the tip are connected, and the stretching-fingers are formed at an obtuse angle on the linewhere they come in contact with the body. Each finger is hinged at its middle to a disk, which is at-tached to the upright cylinder fitted in the upper cross-piece; and on its outer end
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . bed un-der fur lint manufacture, is largely usedfor this purpose. A special machine hashowever been devised, which is illustra-ted in Fig. 2314. This apparatus has aformer of peculiar shape. The rib-which support the tip are connected, and the stretching-fingers are formed at an obtuse angle on the linewhere they come in contact with the body. Each finger is hinged at its middle to a disk, which is at-tached to the upright cylinder fitted in the upper cross-piece; and on its outer end it is secured to a ringwhich is held by set-screws to the two sliding rods in the side frame. The ring is actuated throughconnecting-rods by the crank-shaft, and thus caused to make an up-and-down movement at eachrevolution of the latter. The walking-beam on top of the machine is attached on its left end by alink to the cross-piece, at its middle to the cross-piece which carries the sliding fingers, and at itsright-hand end to the vibrating ring. This connection gives to the disk an up-and-down travel of. HAT-MAKING MACHINERY. 109 about half the length of that ofthe ring. The fingers, as alreadystated, being hinged to the diskand ring, thus have at their lowerextremities a movement to andfrom the centre of the hat, whilethey remain stationary at their pointof meeting above. The effect ofthis is that the hat-tip is stretchedperipherally only, and not radial-ly in addition, as is done on someother machines. Each one of thevibrating fingers works in a recess,into which a portion of the felt isdrawn at each vibration; and asthe body is supported all around,a portion of the crown as well asthe tip is drawn out. From 100to 120 dozen hats per day can bestretched on this machine. From the tip-stretcher, the hat-body is taken to the power brim-stretcher, and then while hot isplaced on the blocking apparatus, represented in , differs chiefly from other ma-chines of i
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
