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 194
. This arrangement, of course, wiU only produce cu-cular molds ; patterns may, however, be used in conjunction with the sweeps, as we shall endeavor to Ulustrate further on. The spindle above named is a light vertical shaft, revolving in a step below and a bearing overhead ; when a part of a mold… … places and indicates the holes or hollows. Into the latter more material is placed, and the sweep is passed round again ; and so on until the job is perfected. It will be noticed in Fig. 194, that the two parts of the mold are retained in their proper position hy a projection on one 9
Patternmaking
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