. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . HAND-TOOLS. 1835 Fig. 3854 is of a lifting or hoisting crab ; Fig. 3855 an improved traversing jack ; Fig. 3856Haleys screw-jack ; Fig. 3857 a tripod jack. We have represented with geometi-ical accuracy hand-tools of great durability, formed to effectthe objects for which they are designed with ease, accuracy, and precision. Most of our illustrationsare of tools manufactured by Alexander Mathieson and Son, of Glasgow, who, as tool-makers,stand first in the
. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . HAND-TOOLS. 1835 Fig. 3854 is of a lifting or hoisting crab ; Fig. 3855 an improved traversing jack ; Fig. 3856Haleys screw-jack ; Fig. 3857 a tripod jack. We have represented with geometi-ical accuracy hand-tools of great durability, formed to effectthe objects for which they are designed with ease, accuracy, and precision. Most of our illustrationsare of tools manufactured by Alexander Mathieson and Son, of Glasgow, who, as tool-makers,stand first in the fiist class. This fii-m have reduced the hardening and tempering of hand-tools to 3856. a science, which can only be acquired bymuch thought and an extensive experience ;their planes and boring tools, in particular,have acquired a well-deserved and exten-sive fame. There are many points of ex-cellence in the larger tools manufacturedby Mathieson to which we shallhereafter refer in our article MachineTools. Knifinç) Machine, Figs. 3858 to 3860, in-vented by J. F. Stephenson. This designis new, and possesses many advantagesover the mode generally in use, namely,chucking on the lathe. One man is ableto set this tool, Fig. 3858, and face twovalve-seats in about an hour, and withoutbreaking the dome-cover joint. Fig. 3858 is a cross-section of a dome cover, with the tool inposition for working. Fig. 3859 is an elevation of the tool itself. Fig. 3860 is a section, showingthe knife for cutting the mitre. A, Fig. 3859, is a plan of nut A. The action is easily explained :
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Keywords: ., bookcentury1800, bookdecade1870, bookidsp, booksubjectengineering
