Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 101
out for the cope part. The groove that this coreis to form is turned on the two sides, but not in the bot-tom ; tool clearance should therefore be allowed on eachside in the bottom to accommodate the turning. Thisis seen in the section at N. I have not shown any core-box for the slab core, /, asit… … Fig. 129 MAKING SHEAVES FROM CORE BOXES. / PATTERN MAKING. 6^ ation that is necessary as to the way to make it. Thefaces, £, of the hub and lugs are covered with slab cores. Another type of sheaves is shown in Fig. 127. Thisstyle can be made considerably cheaper than those Ihave already described.…
Patternmaking
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