Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 866
ute teeth manifestly obtain, however great may be the dimensions of thepitch circle of their wheels, or whatever disproportion may exist between them. Thus of the two wheelsA and B with involute teeth, which work together, let the radius of the pitch circle A c. Fig. 2066, of orwbecome irifinite;… … struck, and which bears a constant ratio to the first, will also become infinite, and therefore the invo-lute m. a will become a straight line, perpendicxilar to the pitch line at a. For it is evident that theextremity of a line of infinite length, unwinding itself from the circumference of a…
Mechanical engineering
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