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 137
Fig. 207. Steel Pinch Dog be inserted near the center of the work to prevent its springing openat the center, due to the centrifugal forces at high revolutions. … Fig. 20*. Core Box for Tee
Patternmaking
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
