Experimental engineering and manual for testing (1903)
Carpenter, Rolla C. (Rolla Clinton), 1852-1919 · New York, J. Wiley & sons; [etc., etc.] · leaf 98
Fig. 49.—Johnson^s Exten-someter. no EXPERIMENTAL ENGINEERING [§83. Thurston Extensometer, but the clamps which are attached tothe specimen are heavier, and are made so that they are heldfirmly in position by springs up to the instant of rupture.This extensometer is furnished with links connecting… … Fig. 50.—The Henning Micrometer. before stress is applied to the specimen. The micrometer isconnected to an electric bell in the same manner as theThurston extensometer. Hennings Mirror Extensometer.^—In 1896 Gus. C. Henningdesigned a mirror extensometer differing in several particularsfrom that of…
Building materials · Machinery
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