THE EXTRACTION OF THE JUICE BY MILLS 



195 



THREE MILLS AS ABOVE (2ND, 3RD AND 4TH). 



H. P. H. P. 



Indicated H. P. ton-cane-hour-mill. ton-fibre-hour-mill. 



Max. 443 ... 2-95 ... 23-3 



Min. 332 ... 2-21 ... I7'4 



Mean 372 



2-48 



I9'5 



The Cane Mill. The machinery employed to express the juice of the cane 

 by milling consists of a system of horizontal cylinders, any two co-acting 

 units of the system being caused to rotate in opposite directions by means 

 of suitable gearing. The mill proper has by this tune been reduced to a 

 standardized 3-roller pattern (shown in side and end elevation and in plan 

 in Figs. 8 1, 82 and 83), characterized by the location of the centres of the 

 three rollers a v a 2 , <z 3 , at the angles of an isosceles triangle. The rollers 



^' 

 ' 



1 



c, 



& 



FIG. 83 



are carried on shafts, axles, or gudgeons, which are in turn sup- 

 ported on brasses, h v h 2 , h 3 , in frames, b, placed at either end of the rollers. 

 These frames are known as housings, headstocks, or cheeks, and rest on the 

 sole plate g. 



The rollers are restrained in position by means of caps, c lt c 2 , c 3 , bearing 

 on the brasses, directly or through distance pieces, the caps being secured 

 to the housings by bolts. Those bolts, d, passing through the top cap are 

 known as the king bolts, thoroughfare bolts, through-way bolts, or top-cap 

 bolts ; those, e, securing the side caps are known as the side-cap bolts. 

 On one end of each shaft, and sometimes on both ends, is fitted a toothed 

 wheel or pinion. The shaft carrying the roller, the centre of which corres- 

 ponds with the apical angle of the isosceles triangle, receives motion through 

 a train of gearing and connecting shaft from some prime mover. 



