The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 172
the upper chord is arched, as in Fig. 6 J, a sufficient weightwill cause tlie braces D, D, to describe an arc upwards, re-presented by c d. Pig. 6 b. When tlic cliord c e becomes PRACTICAL MECHANICS. 167 straight, the arc will then be described downwards, asshown in Fig. & a. As an illustration… … Upon an inspection of tliis figure, it will be seen thatany deflection produced upon the centre of the arch, bymeans of the weight W, will cause the points B, B, to sep-arate, by thrusting outward, and in the direction of the endsof the truss, producing an upward movement of the upperchord, at the…
Mechanics, Applied
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