Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 85
the best formof tooth cannot be made by any interchangeable system;of course, I am speaking now of the epicycloidal form oftooth. For some special machinery, where it is neces-sary to have the best form of teeth, without regard totheir being interchangeable, the Odontograph is setdifferently from… … BEVEL GEARS. PATTERN MAKING. 49 BEVEL GEARS. THE MANNER OF LAYING THEM OUT. Before saying anything about the construction of thesepatterns, some explanation should be made about theHnes that are required. Fig. 99 is a section of the gear and pinion to bemade,and gives the angle at which the two…
Patternmaking
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![An illustration from Perspectiva; hierinnen auffs kürtzte beschrieben, mit Exempeln eröffnet vnd an Tag gegeben wird, ein newer besonder kurtzer, doch gerechter vnnd sehr leichter Weg, wie allerley Ding, es seyen Corpora, Gebew, oder was möglich zuerdencken vnd in Grund zulegen ist, verruckt oder vnuerruckt, frener in die Perspectyf gebracht werden mag, on einige vergebliche Linie, riss vñ Puncten, [et]c. dergleichen Weg bisshero noch nit bekant gewesen (1571)](https://img.insideoutlibrary.com/img/200/ia-perspectivahieri00lenc-58-29.webp)
