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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 81

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 81
80 PATTERN maker's ASSISTANT. through which to pour the melted metal. The cope is now lifted vertically ; and as the pattern is made in halves, the top half lifts with the sand in the cope. In some cases a … screw is fixed into the top half of the pattern, the head of the screw projecting into the cope: the object being to insure tliat the top half of the pattern shall lift with the cope. The next procedure is to extract the two halves of the patterns from the molds, and perform any trimming or…

Patternmaking

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

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