n, the most desirable. We come now to the various chucking contrivances em-ployed by the pattern maker. In Fig. 48, A represents a forkcenter, the taper part of which fits into the lathe mandrel inplace of a center, the extreme end, B, being a flat projec-tion, providing that there is a recess in… … to drive the work. The broad part is wedge-shaped on theedge view, the center point, C, being turned conical, similarto a common center. The center, C, acts to keep the worktrue, and as a guide in taking the work in and out of thelathe, while the prongs, D and E, drive it. This tool, how-ever, is…
Patents · Improved · Inches · Consists · Scientific American · Lathe · Steam engine · Find directions · Sulphuric acid · Nitric acid · Professor mayer · Horse power · Patent issued · York city · Copy scientific
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