Illustrated catalogue and general description of improved machine tools for working metal (1899)
Sellers, William, & co. [from old catalog] · Philadephia, Levytype company · leaf 325
w and head is entirely avoided. The straining-head is provided with a piston packed to receive fluid pres-sure in either direction, and the piston-rod passing through a packed bearing inone end is provided with a screw-thread, similar to that on the draw-bar, toreceive the various holders. The… … acts either as a pressure pipe or an exhaust pipe, depending upon the direction inwhich the strain is to be exerted upon the specimen. The Emery testing-machines are now made horizontal instead of vertical;in the first place to make all sizes of machines of one type, and in the secondplace to get…
Machine-tools · Machinery
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