The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 404
le elastic sub-stance, is made of the form shown in the engraving, marked A, A,and attached to the axle-box at its outer edge. This shield is per-forated in its centre; such perforation being cut to a perfectlysmooth surface, to allow the passage of the journal through it.The perforation is made of… … The diameter of the perforation in the shield for a four-inchaxle should be three inches and five-eighths, the outer diameter ofthe shield should be one-eighth of an inch less than the disc of theaxle-box into which it is to fit, and it will then be found to com-pletely fill it. After having been…
Architecture · Civil engineering · Science
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