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Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
farther insured by rubbing them with black-lead. In their construction, sharp interior angles should be avoided as tending to cause a breaking down of the mold at that point and weakening the casting. Patterns, especially for small castings, are sometimes made of metal. These have the advantage of being more durable, but if of iron require to be taken good care of to prevent rusting. See list under founding; molding. For machine for pattern-making, see numbers of American Artisan for May and June, 1874. Pat′tern-box. （Weaving.) a. A box in a loom holding a number of shuttles, either of which may be projected along the shed, according to the pattern. The automatic means for operating the shuttles in due sequence is a pattern-cylinder or patternchain (which see). b. The box perforated for the harness-cards in the Jacquard figure-loom. See pattern-card. Pattern-card. （Wearing.) One of the perforated cards in a Jacquard loom through which the needles pass; t<