Model making; including workshop practice, design and construction of models, a practical treatise for the amateur and professional mechanic .. (1919)
Yates, Raymond F. (Raymond Francis), 1895- ed · New York, The Norman W. Henley Pub. Co. · leaf 106
e con-sidered a duplicate of the **bottom board, is also pro-vided. In the photographs the **flask is represented bytwo wooden frames resting upon a bottom board. Aregular flask, however, would be larger than this andof more complicated construction, being provided withguide pins between cope and… … Fig. 64—(Above). Pattern exposed and piece moulded in placeFig. 65—(Below). Pattern withdrawn and two-piece pattern held together with dowel pins called ^^cheek pieces are sometimesintroduced betweencope and drag for producing complicated castings and anumber of pieces are usually moulded in one…
Machinery
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