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 86
85 THE FOUNDEY — CORES. dent draft or taper can be allowed on the core, the core ibox need not be made in halves, but may be made 8oM^ as shown in section in Fig. 75. … While it is the aim of the pattern maker to form his core hoxes to work in the simple manner illustrated in our examples, there are very large classes of cores with which such easy methods are impracticable. This, for instance, is the case with all round cores that are of such length that they are…
Patternmaking
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
