The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 133
lly expands as the tube is drawn through it, the openingthereby becoming gradually larger; whereas, in the ordinarydraw-plates, the opening through which tubes are drawn is jierma-nent, and finishes the tube of an exactly similar diameter to tliatwhich it commenced. Fig. 1 represents an end view of… … Fig. 1. Fig. 2. purpose extremely well. It is made of a sufficient thickness towitlistand the pressure necessary to the drawing the tube of therequired form, which will in a great measure depend on the thick-ness of the metal to be drawn. The rough tube having beenplaced on the mandril, is drawn…
Architecture · Civil engineering · Science
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