Woodwork for secondary schools; a text-book for high schools and colleges, prevocational and elementary industrial schools (1916)
Griffith, Ira Samuel, 1874-1924 · Peoria, Ill., Manual Arts Press · leaf 331
k where the sand is not handled.Such dry-sand cores are baked in anoven known as a core oven. Fig. 513. 270. Pattern Draft.—That a pattern may be drawn from the sand with as little distortion to the mold as possible, patterns are made with their vertical sides tapering. This tapered effect is known… … Fig. 514. EffectOF Draft. PATTERN MAKING. 327 vertical and the draw is across the grain of the wood, thedraft should be at least Y to the foot. If the draw iswith the grain, the allowance may be as low as ^^. Anallowance of | draft per foot may be compared to thetaper of a wedge 1 ft. long, ^ thick…
Woodwork (Manual training)
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