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The pattern maker's assistant : embracing lathe work, branch work, core work, sweep work, and practical gear construction : the preparation and use of tools : together with a large collection of useful and valuable tables (1878)

Rose, Joshua · New York : D. Van Nostrand · leaf 133

An illustration from The pattern maker's assistant : embracing lathe work, branch work, core work, sweep work, and practical gear construction : the preparation and use of tools : together with a large collection of useful and valuable tables, 1878, leaf 133
CHAPTER Vir. WHEEL AND PULLEY WORK". Our fourth example is a double flanged pulley, shown in section in Fig. 128 ; and our first consideration is, how it shall be molded. It evidently should Me in the sand in … the position shown in Fig. 129; but it will be observed that the sand is confined between two flanges, rendering it practically impossible to retract the pattern from the mold, if it is made in one piece. We say practically im- possible, meaning that it cannot be done economically ; for strictly…

Patternmaking

Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.

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