. Memoirs of the American Academy of Arts and Sciences. aced thesmall cylinder, covered with straight teeth smaller than those of the great cylinder. * More commonly called a circular hatclitl or lapper. o/ 0 MEMOIR OF DANIEL TREADWELL. The cogwheel k, Fig. 1, fixed to the small cylinder, is driven by the pinion l, Fig. the small cylinder, just above the points of the teeth and parallel to the axisof the cylinder, are several hgs or staves, p p. Alternating with every row of teethis placed a rod or clearer, R R, Fig. 2 ; these rods are also parallel to the axis,and extend beyond the end
. Memoirs of the American Academy of Arts and Sciences. aced thesmall cylinder, covered with straight teeth smaller than those of the great cylinder. * More commonly called a circular hatclitl or lapper. o/ 0 MEMOIR OF DANIEL TREADWELL. The cogwheel k, Fig. 1, fixed to the small cylinder, is driven by the pinion l, Fig. the small cylinder, just above the points of the teeth and parallel to the axisof the cylinder, are several hgs or staves, p p. Alternating with every row of teethis placed a rod or clearer, R R, Fig. 2 ; these rods are also parallel to the axis,and extend beyond the end of the cylinder, and are kept in place by two beltsof leather, one at each end, to which they are secured by thongs. At each side ofthe frame is fixed a wedge or inclined plane, T t, Figs. 1 and 2, over which theends of the rods or clearers must pass when the cylinder n revolves, and thus bebrought near to the teeth of the great cylinder. On the opposite side of thecylinder B is a shaft having upon it a rack (p, Fig. 2, v. Fig. 3), one of the bars of. Fig. 3. which lies in one of the spaces, between the rows of teeth of the great cylinder. Toput the machine in operation it is only necessary to present the hemp, flax, wool,or other substance to be operated upon, to the small cylinder; the great cylinderbeing put in motion in the direction of the arrow, the small cylinder, with whichit is connected by a proper belt, passes with the hemp upon it under the lags orstaves, which press the hemp into the teeth. When the forward ends of the mate-rial thus carried in the teeth arrive at the point nearest the large cylinder, thewedges raise the ends of the rods or clearers, and with them the hemp out of theteeth of the small cylinder, so that it is struck by the teeth of the great cylinder,by which the operation of clearing, combing, or hatchelling is performed. Whenthe hindermost ends of the hemp arrive at the wedges T t, the fibres slip from the MEMOIR OF DAXIEL TREADWELL. 371 teeth of
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