THE EXTRACTION OF THE JUICE BY MILLS 



227 



Multiple Roller Mills. Robinson took out a patent (8731, 1840) for a 

 4-roller mill, with the three rollers arranged round the circumference of a 

 fourth central roller, which was twice the diameter of any of the others, 



being the driven 

 turn drove the 

 same arrange- 



FIG. 134 



this central roller 

 roller, which in 

 other three. The 

 ment forms the 

 essential part of 

 Le Blanc's patent 

 (5494 of 1883), 

 Fig. 130 ; and a 

 central or "pri- 

 mal " roller, with 

 up to twelve 

 smaller rollers ar- 

 ranged round it 

 in various com- 

 binations, forms 

 the subject of 

 patents granted 

 to Guy (7725 of 

 1887, and 2416 

 of 1890). 



The addition 



of a fourth roller as a feeding roller appears in Guy's patent (7745 of 1885) 

 and Lateulade's (12208 of 1892). 



Robinson's patent (8731 of 1840) also claimed a 6-roller unit, the three 

 upper rollers being vertically over the three lower rollers. 



In mills of this type, Fig. 131, the driven rollers are the two middle 

 rollers, 3 and 4, the latter of which gears with and drives rollers 2 and 6, 

 these driving rollers I and 5. The gears are mounted on opposite ends 

 of the shafts. Patents for construction similar to this have been granted 



to Hosack (2316 of 1869) and Call (2212 

 of 1870). A mill of this type with eight 

 rollers was erected in 1884 at Courcelles 

 in Guadeloupe by Brissoneau and La 

 Haye. 



Robertson and Hudson's 'patent 

 (602 of 1887) preferably included four 

 rollers, Fig. 132. The driven pinions 

 were carried on a separate shaft, 5, gear- 

 ing on one end with roller 2, which drove 

 roller i, and on the other end with roller 

 4 driving roller 3. 



A multiple roller mill with an odd 

 number of rollers was patented by 

 Rousselot (2572 of 1887), by Deacon 

 (15976 of 1888), by Guy (2796 of 1891), 

 and by Hughes (U.S. 395837 of 1889). 



All these are essentially the same, and are indicated in Fig. 133. The drive 

 was from the lower central roller, i, which geared with the two upper rollers, 

 2 and 3, which in turn drove the two outer lower rollers, 4 and 5. This 



135 



