Pattern making; a practical treatise for the pattern maker on wood-working and wood turning, tools and equipment, construction of simple and complicated patterns, modern molding machines and molding practice (1921)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 175
2 J inches each. Template, On a new sheet of zinc carefully lay out arcs withthe radii o, d, c, and r, and the form of the face and back of the vane 156 PATTERN MAKING per data given by the designer. The chord e must be carefullyspaced to give the proper number of vanes. Multiply the diameterof the… … Fig. 274. Plan and Elevations of Iron Core Box length. Experience is the best teacher as to how much should beallowed for this expansion, different mixtures of core sand, hardnessof ramming, and rate of drying, all having effect, and the bottomof a core expanding more than the top, due to settling…
Patternmaking
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