Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 92
How to get the Lines for Thread of a Worm … T / Fig. 109. E illL WORM WHEEL PATTERN. Fig. lie. PATTERN MAKING. 55 should be about the same diameter as the rim, so as toallow the ends of the teeth to be turned off. Lay eachhalf up separately, with the parting joint of pattern againstthe face plate, rough off the outside and finish the…
Patternmaking
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