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 (1916)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 88
Fig. 140. Core Box for BronzeBushing of Fig. 13S PATTERN MAKING 71 … Fig. 141. Core-Box Stock with Construction Lines small groove scratched along the center of the flat side of each half,to form a vent for the gases generated during the pouring. A smallV-notch, as seen in Fig. 148, should be cut at the center of eachend of the half-core boxto assist in making…
Patternmaking
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
