. The Americana : a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc. of the world . rand a smooth-roll crusher, and is especially use-ful for the working of clays that require anextra amount of preparation, or those having alimited amount of small stones, or of a lumpynature. The upper section is made of two rollsrunning at variable speed. Similar to that ofthe disintegrator, the small or high-speed rollhas projecting lugs of hardened steel, or it maybe studded with steel bolts set staggered so asto form corrugations. The
. The Americana : a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc. of the world . rand a smooth-roll crusher, and is especially use-ful for the working of clays that require anextra amount of preparation, or those having alimited amount of small stones, or of a lumpynature. The upper section is made of two rollsrunning at variable speed. Similar to that ofthe disintegrator, the small or high-speed rollhas projecting lugs of hardened steel, or it maybe studded with steel bolts set staggered so asto form corrugations. The large roll operatesat a slower speed. The effect of the combinedmotions of these rolls is to shred or separatethe material and prepare it for the further ac-tion of the lower section, which is composed oftwo large chilled-face rolls also run at differ- CLAY MARL —CLAYPOLE ential speed. The lower rolls may be adjustedclose to each other and thus act as fine grindersof the material partially prepared by the upper■Of the various machines and appliances em-ployed in the working of clay, other than thosealready described, Fig. 8 shows a type of belt-. Fig. 8.—Belt-Conveyor. conveyor; Fig. 9 a bucket elevator, and a steam-shovel. When it is necessary to diga quantity of clay sufficient for an output of60,000 bricks per day, the steam-shovel can beused profitably; while for an output of 100,000
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1903
