The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 173
ss, producing an upward movement of the upperchord, at the ends of the braces D, D, the latter describingarcs of a circle upward, and from thence will 1)0 couimuni- 168 PRACTICAL MECHANICS. cated by means of the tension rods C, C, to the centre ofthe lower chord, raising the latter at the point… … Any deflection produced in the centre of the arch willcause an outward, and consequently, an upward force, at theupper ends of the braces, which, by means of the tensionrods and strut, is transferred directly back to the underside of the arch, producing an upward force at the latterpoint, equal to…
Mechanics, Applied
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