Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . shields and gauze-covered openings near the periph-ery of the same. The cylinder runs on anti-frictionrollers. Fig. 4073. 7. Bell-shaped runner in conical case. This has Fig. 4070. Quartz-Mill mith Rotary Beaters. which is formed of segmental passes to the final reducing stones. From thenceFig. 4075. Fig. Quartz-Mill tvit/i Vibrating Jaw. two re
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . shields and gauze-covered openings near the periph-ery of the same. The cylinder runs on anti-frictionrollers. Fig. 4073. 7. Bell-shaped runner in conical case. This has Fig. 4070. Quartz-Mill mith Rotary Beaters. which is formed of segmental passes to the final reducing stones. From thenceFig. 4075. Fig. Quartz-Mill tvit/i Vibrating Jaw. two revolving toothed surfaces, one within the other,the interior in the shape of a cone, and the otherone formed around the interior ; both of these partsrevolve in the same direction, but the interior onemuch faster than the outer. Fig. 4074. 8. Conical mill. The ore is broken and thrown Quartz-Milt toith Horizontal Runntr. 9. Inclined disks. This has two revolving diskswith conical-shaped stirfaces revolving in diHerentdirections, and hung upon shafts placed diagonallyto each other, so as to bring the two faces of twogi-inding disks parallel with each other. Fig. 4076. 10. The rolUiig ball. This has a stationary mor-
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