Modern moulding and pattern-making : a practical treatise upon pattern-shop and foundry work, embracing the moulding of pulleys, spur gears, worm gears, balance-wheels, stationary-engine and locomotive cylinders, globe valves, tool work, mining machinery, screw-propellers, pattern-shop machinery, and the latest improvements in English and American cupolas ... (1907)
Mullin, Joseph P · New York : D. Van Nostrand · leaf 159
136 MODEEN MOULDING AND PATTERN-MAKING. The method of casting the mortar is shown at Figs. 137 and 138, and requires very little explanation. As will be seen by the drawing, it is moulded in an iron flask. Two blowers 1" in diameter, to let off the gas, are shown at H H, Fig. 138. The main feeders… … Fig. 139. should be W in diameter, and from each of these make two branch feeders 2^ X 1". The risers KKare 3" in diameter at the top, and taper down to 2" at the bot- tom. These may be fed with hand ladles, and pumped in with a rod till the metal sets.
Founding · Patternmaking
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
