File:Illustrated catalogue and general description of improved machine tools for working metal (1899) (14771155274).jpg

Identifier: illustratedcatal00sell (find matches)
Title: Illustrated catalogue and general description of improved machine tools for working metal
Year: 1899 (1890s)
Authors: Sellers, William, & co. (from old catalog)
Subjects: Machine-tools Machinery
Publisher: Philadephia, Levytype company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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fluid ; this hydraulic chamber is connected by a pipe, e, with a smaller butsimilar chamber, B, placed in the scale ; the piston c, of this latter chamber actsthrough the block H against the first lever C of the scale, which thus receives afraction of the load upon the piston c determined by the relation between the areasof the two hydraulic cylinders A and B. The scale-body is a rigid cast-iron frame carrying the steel scale levers, allthe supports and connections of which are thin flexible plates of steel firmlysecured to the levers and their supports, and having a sufficient exposure betweentheir fixed ends, that the amount of bending due to the movement of the leversshall be well within the elastic limit of the material. The long arm of the leverC is coupled by the bar D with the short arm of the poise-frame lever E: the longarm of this lever carries all the standard weig-hts of the scale, and the method of Wm. Sellers & Co., Incorporated, Philadelphia, Pa. 311 Plate No. 254.
Text Appearing After Image:
HYDRAULIC-SUPPORT TESTING-MACHINE. Maximum Capacity, 500,000 lbs. Ratio from main weighing-platen to point of indicator needle in scale-case,300,000: I. Used for calibrating the hydraulic supports of all new testing ma-chines, and adjusting the poise weights with great precision. Extremely sensi-tive, 200 grains on main platform will put in motion 20,000 lbs. of levers andplatforms, and deflect scale needle. No reduction of sensitiveness when fullyloaded. 312 Wm. Sellers & Co., Incorporated, Philadelphia, Pa. putting them on or taking them oflf, without handling, is peculiar to the Emery-system. Suspended from this lever, E, at suitable intervals by thin fulcrumplates, are poise frames, N, consisting of an upper cross-head, ^, and a lowercross-head, T, united by three vertical bars disposed at equal intervals about thecross-heads. Fig. I.

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