SPINNING 



inches diameter and 15 inches broad, with six separate and twisted rovings 

 wound upon it. (See figs. 1872, and 1872a.) Tho twist is given by tubes in two 

 directions, so that it remains in it (see fig. 1872a), the tube turns in the samo 



1872 



direction, while the roving advances 4 or 

 5 inches, and then turns in the other 

 direction. These laps or bobbins are then 

 placed behind a machine, which he calls 

 a coil-frame, the most important arrange- 

 ment of which he claimed already in his 

 patent of 1835. It consists of a slot, with 

 a travelling spout, without which the coils 

 cannot be formed under pressure. 



Coil Frame. The bobbins (fig. 1872) 

 are placed behind this machine, and two 

 ends from the bobbin are passed through 

 the drawing rollers, and formed into one 

 xmtwisted silver or roving in the follow- 

 ing manner : When the cotton has passed 

 through the drawing rollers and calender 

 rollers, A, (see/iff. 1873)itispassed through 

 the tube, B, and the finger, c ; the spindle 

 with its disc, D, revolves in such a propor- 

 tion as to take up the cotton which pro- 

 ceeds from the calendar rollers, A, and 

 cause the rovings to be laid down in a 

 spiral line closely, one by one ; and as the 

 rollers, A, work at a regular speed, it is 

 evident that the motion of the finger, c, 

 and the speed of the tube, B, must vary ac- 

 cordingly. The coil, E, is stationary, and is 

 pressed by the lid or top, F, which slides 

 up the spindle, o, made of tin-plate. Tho 

 cotton enters through the slot, x,fiff. 1873. 

 It is quite evident that the finger, c, and 

 spindle, G, only perform one and the same 

 varying motion, which is repeated at every 

 fresh layer, and the coil is thus built from 

 below ; it is about 8 inches in diameter 

 and 18 inches high when compressed, and 

 contains 4i Ibs. of cotton. There are 

 several modes of forming these coils, but 

 one only is shown here. These coils are 

 placed behind the twist-coil frames in 

 half-cans or partly open ones or troughs, 

 or behind a winding machine, where they 

 arc wound upon rollers side by side, like 

 the lap or bobbin shown in the drawing 

 frame, and placed behind the twist-coil 

 frame in this state. 



o 



