874 



SPINNING 



Twist-coil Frame. This frame forms rovings into coils similar to those above 

 explained, with this difference: that the rovings are fine, say, from 1 to 10 hanks per 

 pound, and regularly twisted ; their diameter varies from 2i to 5 inches. The same 

 machines produce rovings more or less fine, but the diameter of the coils does not 

 differ. The difference of this machine from that above described consists in the 

 dimensions of their parts, and in its having the spindle, o, and the lid or top, F, 

 revolving, as well as the tube, B. (See/^. 1874.) In this machine the motion of the 

 spindle, B, is uniform : the spindle, o, however, is connected by the bevel-wheels, H 

 and i, with a differential motion at the end of the frame, with which the motion of the 

 finger, c, corresponds. The skew- wheels, K. and L, are connected with the drawing 

 rollers, A. The speed of the tube, B, and the spindle, o, are so proportioned, that 

 while the spindle, G, performs one revolution, -and therefore puts one twist into the 

 roving, the tube, B, also performs one revolution, missing so much as will be required 

 to pass through the slot in the cap or disc, D, and lay on it as much of the roving as 

 proceeds from the rollers, A, and in which one twist is contained. Of course the 



1875 



twist of these rovings can be adapted to their fineness and varied ; but it is evident 

 that, on account of the regularity of the machine and its simplicity of movement, the 

 rovings can never be stretched, and much less twist can be put into them than can be 

 put in the common fly-frames. These coils are put behind the spinning machines on 

 shelves or in small cans, open in front ; or they are wound from 24 to 72 ends upon 

 bobbins, and placed upon unlap rollers behind the spinning frames. 



Coiling Machine for Carding Engines (aid Drawing Frames. These are simple 

 machines, which may be applied to carding engines or drawing frames of any descrip- 

 tion. The}' form large coils, 9 inches in diameter and 22 inches long, when on the 

 machine. There are two spindles (see a, fig. 1876) on each machine, for the purpose 

 of doffing without stopping the drawing frame and carding engines. When one coil 

 is filled, the finger, b, is just brought over to the other spindle, so that the full coil is 

 stopped and the new one begins to bo formed without the slightest interruption of the 

 machine. 



Coils are formed in various ways, also in cans ; but this description is sufficient to 



