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 48
MOULDING PULLEYS WITHOUT A PATTERN. 29 the pulley, and also a section of the arm and hub, must be set on the bottom, in the positions shown at C and J). The whole end or arc of the box should be made loose, and held in place with stout screws ; then, when the core has been made, and is ready to… … box, the screws can be taken out, and the end removed, and thus avoid all danger of breaking the core. A plan of the core-frame is shown at Fig. 20. The circles, Nos. 1, 2, and 3, indicate the location of the holes or staples for inserting the hooks or lifting-irons.
Founding · Patternmaking
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
