Grant, George B. (George Barnard), 1849-1917 · Boston, Grant gear works, incorporated · leaf 85
the teeth inan elliptic gear, the main featuresof which, omitting various unessen-tial details, are shown by Figs. 139and 140. The blank to be cut is fastenedupon a trammel stand, which cor-responds to the paper in the graphi-cal process, and revolves upon thefixed base. The adjustable trammelpins… … rianFig. 139, Ctitter
Gearing
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