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 100
of the several parts can be understood.A is the ring of teeth moulded from the tooth block,B B are the cores made from the box in Fig. 65, C is GEAR WHEELS—MACHINE MOULDED. 85 the central boss core, c the thickness of metal in thoboss, and d d the thickness of the vertical arms. Acore box for arms… … Fig. 67. Core Box for Arms of Cross Section. these boxes are not used nearly so frequently as thosefor arms of H section. Bevel wheel blocks are made as shown in Fig. 68.I have dotted in the outline of the rim and arms, notbecause these have any existence in the block, but toillustrate the relation…
Patternmaking
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