. Bulletin. Agriculture; Agriculture -- Arizona. M.\Ni-i'ACTrKi-: oi" Cr-MKxT riiM-: 85 the forms arc filled, the inner form is withdrawn and the outside form with the tile is taken away on a wheeled carrier. On the older machines the inner form was withdrawn downward, but in the latest models it is pulled upward. The older models have two tampers; the later models, one. The range of pipe sizes is from 4 inches to 30 inches in diameter on the largest of the three sizes of machines. The pipe machine used at Glendale recently is a Hammond. Its construction is shown in Fig. 10. A vertical sh
. Bulletin. Agriculture; Agriculture -- Arizona. M.\Ni-i'ACTrKi-: oi" Cr-MKxT riiM-: 85 the forms arc filled, the inner form is withdrawn and the outside form with the tile is taken away on a wheeled carrier. On the older machines the inner form was withdrawn downward, but in the latest models it is pulled upward. The older models have two tampers; the later models, one. The range of pipe sizes is from 4 inches to 30 inches in diameter on the largest of the three sizes of machines. The pipe machine used at Glendale recently is a Hammond. Its construction is shown in Fig. 10. A vertical shaft is concealed in the heavy cast iron standard. This shaft operates the tamper which is carried on a swinging arm. At the bottom is a horizontal shaft which drives the vertical shaft and rotates the table on which the pipe is made. This shaft carries a winding drum, also, by means of which the inside form is with- drawn upward. The hori- zontal shaft is driven by a quarter-turn belt from a jack shaft above, and the jackshaft is driven from the main shaft which also drives the tw^o-sack batch mixer and the endless belt elevator. A 20-horse- power electric motor fur- nished the power at Glen- dale. The outside forms are of heavy steel, in halves, held with screw clamps. The inside form is a long cylinder with surface well pol- ished by the rubbing to which it is subjected when a tile is being made. The Thomas-Hammond machine has been used mostly for bell-ended pipe and the Glendale specifications required bell and spigot joints. When the body of the pipe has been tamped full, a special form to make the bell is put in place, and the tamping is then continued. The pipe rests on a cast iron ring with three blunt feet. When a fresh pipe is wheeled to the curing space the bell form is. Fig. 10.—The Thomas-Hammoncl pipe Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of
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Keywords: ., bookauth, bookcentury1800, bookdecade1890, booksubjectagriculture
