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Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. (1905)

Hand, L. H. (Louis Henry), b. 1854 · Chicago, F. J. Drake & co. · leaf 120

An illustration from Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .., 1905, leaf 120
s / / in place,and if possible secure them from warping withgood heavy angle irons let in flush with the AND FOUNDRY PRACTICE 115 wood, as at c c, Fig. 67a. Now get out asweep, a. Fig. 67a, which exactly fits the side ofthis plank or bottom board. Hang the sweepby the two arms c c to the center… … T^ould for fhited ceRumn ma^t entirely ef core^ it passes back and forth over it. To make ahalf core on this device it is only necessary topack the sand on the bottom board and pass thesweep a backwards and forwards over it, fillingin sand until the desired form is obtained. Fig. 68 is designed to…

Patternmaking · Founding

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