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Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
ing over pulleys. The arrangements for testing, crushing, bending, transverse, compressing, punching, or indenting strains are in general similar; the specimen being placed in the space between the cross-head and cylinder, so as to be subject to a compressive force, while for applying tensile or drawing and similar strains it is placed on the other side of the cross-head, so as to be drawn toward the cylinder a. Special appliances for each of these requirements are provided. See also Greenwood's testing-machine, page 58*, Class VII. Vol. I., Official Catalogue of English Exhibition of 1862. See also weighing-scale. In the hydraulic tensile testing-machine (Fig. 6329), the ram of the cylinder being pushed back, the specimen is held by the two clips a b, and the pump, operated by the lever c, causes the ram to exert a pulling strain upon it, which is communicated to a rod connected with the scale-beam, which has a sliding weight and removable weights, indicating the force ap