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 51
The numbers for pitches not stated in the table, may be obtained from the column of some otherpitch by direct proportion. Thus for 4-inch pitch, by doubling the number of the column of the 2-inchpitch; for 4^ by doubling 2^, and so on; or if the difference be small, the column belonging to th« … nearest pitch may be employed without a serious error; or more accurately, a number may be takenhalf-way between those given in the two nearest columns. Also no tabular numbers are given for 12teeth in the upper table, because witliin the pitch circle their teeth are radial lines. GEERING 43 In…
Gearing · Mills and mill-work · Odontograph
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