Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 153
14G JOINTS, AND JOINING TIMBERS. JOINT, PATENT EXPANSION. Figs. 2432 and 2433 represent a patent expansion-joint, patentedby Z. R. DrcHAM, of New York, March 20, 1847. 2433. … JOINTS, AND JOINING TIMBERS. As timber cannot always be obtained of sufficient lengthfor tie-beams, or bridges, it is necessary to unite two or more pieces together by their ends, which iscalled scarfing, and is differently performed by carpenters. The most common means is lapping, orhalving, or,…
Mechanical engineering
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