The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 132
aiinfac-tnre of tubes, and in tlie manufacture of certain, articles made in partof tubes.—Granted September U, 1848; Enrolled March U, 18t9.[Reported in the Patent Journal.] This invention relates: First—to improvements in the makingof taper tubes, which is effected by drawing them through dies… … In the manufacture of taper tubes, this invention is not confinedto the making of that description whose sides are in straight lines,as at A, but may also be employed in the manufacture of such asare of a curved form, as represented at B, and C, and also in thetubes having flutes in a longitudinal…
Architecture · Civil engineering · Science
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