. Bulletin. Agriculture; Agriculture -- Arizona. Manufacture of Cement Pipe 83 of sizes in the regular equipment is from 14 inches to 36 inches diameter. The lengths used are 24, 30, and 36 inches. A view of the National pipe machine is sht)\vn in Fig. 9. The heavy steel frame is seen to carry a short main shaft (8) driven by pulley, and a long countershaft (6) at the top driven by chain. The countershaft operates two vertical tampers (4), which play up and down like trip hammers, alternately striking tamping blows, 350 per. Fig. 9.—The National pipe machine. minute each, with a force of 75 po
. Bulletin. Agriculture; Agriculture -- Arizona. Manufacture of Cement Pipe 83 of sizes in the regular equipment is from 14 inches to 36 inches diameter. The lengths used are 24, 30, and 36 inches. A view of the National pipe machine is sht)\vn in Fig. 9. The heavy steel frame is seen to carry a short main shaft (8) driven by pulley, and a long countershaft (6) at the top driven by chain. The countershaft operates two vertical tampers (4), which play up and down like trip hammers, alternately striking tamping blows, 350 per. Fig. 9.—The National pipe machine. minute each, with a force of 75 pounds. The tampers begin at the bottom and work up with the concrete. The table (2) on which the forms are set is rotated, bringing all parts of the tile under the tampers. The mortar or concrete is elevated (1) and dropped into the mold as in the other machines. Five horsepower is said to be required on the belt and a 10-horsepower gasoline engine is ad- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of Arizona. Agricultural Experiment Station. Tucson : Agricultural Experiment Station, University of Arizona
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Keywords: ., bookauth, bookcentury1800, bookdecade1890, booksubjectagriculture
