The pattern maker's assistant : embracing lathe work, branch work, core work, sweep work, and practical gear construction : the preparation and use of tools : together with a large collection of useful and valuable tables (1878)
Rose, Joshua · New York : D. Van Nostrand · leaf 209
he axial lines of the shafts would meet if produced. In order to give this direction to the teeth of a bevel wheel or pinion, we must set them square ; but to an article of the shape we have produced, an ordinary square cannot be applied in this case, and the workman calls to his aid one of the… … A B is the line passing around it, of which we have pre- viously spoken. In it take any point, G ; it may be one of the points already made in pitching off. With 0 as a cen- ter, and at any distance convenient, mark D and D ; with D and D as centers, and at any suitable distance, mark the arcs…
Patternmaking
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