A short treatise on the designing and construction of gearing and mill-work. Accompanied by an explanation of the construction and use of the odontograph of Prof. Willis .. (1873)
[Scott, David] engineer. [from old catalog] · New York, D. Appleton and company · leaf 57
olute 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 onabecome infinite;… … Btruck, 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, perpendicular 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 circle…
Gearing · Mills and mill-work · Odontograph
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