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 823
common point c, limits what is called the pitch line or circle ; that is, a circle de-scribed from the centre A, and another from the centre B, through the same point, are called, the first,the pitch circle or pitch line of the pinion, and the other of the wheel. They are also sometimes calledthe… … GEERING. 813 One of these arcs, as that intercepted by pp in Fig. 2018, comprehends a complete tooth and space,meaning by space the hollow opening between two contiguous teeth.
Mechanical engineering
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