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 155
nd at F> Fig. 251. The part which has been cut away isreplaced by the three blocks a, a, and b, which are shaped to givethe required size and form to the steam-port cores. These blocksare fastened by dowels, loosely, to the main part of the core box,and, after the core has been rammed up, the… … Y\%. 251. Views of Live Steam-Port Core Box PATTERN MAKING 139 GEAR WHEELS Accurate Teeth Required. In this special class of pattern work,the greatest accuracy and care must be taken, not only in buildingup the rim of the wheel, but in fitting and placing on the rim theblocks out of which the teeth…
Patternmaking
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