Experimental engineering and manual for testing. For engineers and for students in engineering laboratories (1906)
Carpenter, Rolla C. (Rolla Clinton), 1852-1919 · New York, J. Wiley & Sons; [etc., etc.] · leaf 164
ade with bell andbattery at m, n, and m\ n, so that contact of the micrometer-screws is indicated by sound. The construction of the clamp-ing device is fully shown in the plan view, Fig. 81. The principal peculiarity of this extensometer consists in theaddition of four pulleys, Clt C2, C% and CA,… … Fig. 78. 134 EXPERIMENTAL ENGINEERING. [§86. drum. It is at once evident that any extension of the speci-men SS will draw in the free end of the cord at twice therate of the extension; moreover, any slight swinging or rock-ing of the extensometer head will produce compensatingeffects on the length…
Building materials · Machinery
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