MEMOIR OF DANIEL TREA DWELL. 



i>7 



is 



Fis 2. 



thumb-screw /; and the band n, by raising the shaft a. that bears the pulley k. 



a plate of sheet iron fastened to the frame, which, with another similar plate on the 



opposite side of the frame, directs the hemp to the drawing-belts m and n. 



Now let us suppose the hatchel-belt e e 

 to be moving in the direction of the arrow, 

 and a portion of hemp forming a column en- 

 large roving to be placed upon a trough bo 

 that it shall be conducted to the points on the 

 left of the hatchel belt, into which it will be 

 pressed by the cylinders of the bobbin-belt, 

 and pass along with that belt until it reaches 

 the plates z. These plates direct it to the 

 place where the belt m meets the belt n on 

 the under side of the pulley d, Fig. 2, and 

 around which these belts both pass. Now 

 the tension of the belt m, being very great, 

 this nips or presses the fibres of hemp very 

 closely upon the belt n, passing round the 

 pulley e, and they are carried in the space 

 between the two belts, and on the outside of 

 both, in the direction in which these belts 

 pass, being drawn along wholly by the ten- 

 sion of the belts until the fibres reach the 

 point between the pulleys c and /, at which 

 the belts separate. The drawing-belts move 

 much faster than the hatchel-belt, and the . 

 column of hemp which lies in the hatchel- 

 belt must be drawn through the points, and be reduced 



deg 



sponding to tin 

 As the hemp n 

 tinue to be formed ii 

 the belts, or. w T hen d 



greater velocity of the drawing-belts over that of the hatchel-belt 



ay b 



lly supplied to th 



belt, the fib 



o 



*J 



fall 



delivered fi 



sufficiently 



twisted, by any proper app 



a yarn. 

 The 



A 



ach 



now 



d 



more 



complicated machine for the same 

 spinning-machine, had already been patented 



ted on the 5th of February, 1834. 



with the 



pose 



ged 



for 



use 



the 11th of October, 1831 



