o/ 







MEMOIR OF DANIEL TREADWELL. 



The cogwheel k, Fig. 1, fixed to the small cylinder, is driven by the pinion l, Fig. 2. 

 Over the small cylinder, just above the points of the teeth and parallel to the axis 

 of the cylinder, are several hgs or staves, p p. Alternating with every row of teeth 

 is 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 belts 

 of leather, one at each end, to which they are secured by thongs. At each side of 

 the frame is fixed a wedge or inclined plane, T t, Figs. 1 and 2, over which the 

 ends of the rods or clearers must pass when the cylinder n revolves, and thus be 

 brought near to the teeth of the great cylinder. On the opposite side of the 

 cylinder 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. To 

 put 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 cylinder 

 being put in motion in the direction of the arrow, the small cylinder, with which 

 it is connected by a proper belt, passes with the hemp upon it under the lags or 

 staves, 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, the 

 wedges raise the ends of the rods or clearers, and with them the hemp out of the 

 teeth 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. When 

 the hindermost ends of the hemp arrive at the wedges T t, the fibres slip from the 



