The principles of pattern making, written specially for apprentices and students in technical schools (1900)
Horner, Joseph Gregory, 1847-1927 · London, New York, Pitman · leaf 98
s edgecoloured with red lead, or whitened with chalk. Thesquare should also be used, as the work nears comple- GEAR WHEELS—MACHINE MOULDED. 83 cion, until at least the internal space d is straight,properly shaped, and at precise right angles with theface. The outsides may be finished with less… … C- Fig. 65. Core Box for Wheel with Arms of H Section are almost invariably made from cores, and there is onespecial form of arms almost invariably made use of:the H section, shown in Fig. 64, both in vertical andsectional plans. The core box for arms of this sectionis illustrated in Fig. 65, the…
Patternmaking
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