Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 861
indefinitely to d. Parallel to this line and from the point c draw e to e, and in this line take the centreof the second wheel. The line cmd gives the direction of the teeth; and if from the centre a withradius at a circle be described, the direction of any tooth of the wheel will be a tangent to…
Mechanical engineering
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