Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 84
in Fig. 118. Thepattern is jjlaced on the mouldingboard in the inverted drag and isrammed up as usual. When thedrag is turned over, the jjositionof the pattern in the sand is asshown in cross-section in Fig. 119.The sand that may have entered the cui-ve c d e is lifted out, and the necessary draft… … Fig. 120. 67 60 PATTERN MAKING will be lifted with it. The pattern is now removed; the bolt-holecores are placed in position; and the cope is returned to its placeon the drag. Ill this case the core prints should be in lengtli at least twicethe thickness of the metalthroujrh which the hole is to
Mechanical engineering -- Dictionaries
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