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 25
16 GEERING. One of these arcs, as that intercepted hj ppm Fig. 2018, comprehends a complete tooth and space,meaning bj space the hollow opening between two contiguous teeth. ^ W … By the pitch lines of a geering pair is, therefore, to beunderstood the proportional circles in which they wouldrevolve upon each other if they were simply cylinderswithout teeth; and the pitch of the teeth is the lengthof arc of the pitch circles, measured from the centre ofone tooth to the centre…
Gearing · Mills and mill-work · Odontograph
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