. American engineer and railroad journal . i in. To draw the wheels, firstlay down their axes or center lines at the required angle K S B \oeach other. Thenlay off on each sideoi S K distancesC D and C E =half of the pitchdiameter, anddraw lines a b andc d parallel to 5 the same thingfor the pinion, anddraw t y and g from E, the. point of intersec-tion, draw lines ED perpendicularto S K and E Fperpendicular toSB; then E £>and E /will be themajor pitch diam-eters from whichthe primitive pitchcones D S E andE S F may bedrawn. The re-maining parts ofthe wheel maytbeo be l
. American engineer and railroad journal . i in. To draw the wheels, firstlay down their axes or center lines at the required angle K S B \oeach other. Thenlay off on each sideoi S K distancesC D and C E =half of the pitchdiameter, anddraw lines a b andc d parallel to 5 the same thingfor the pinion, anddraw t y and g from E, the. point of intersec-tion, draw lines ED perpendicularto S K and E Fperpendicular toSB; then E £>and E /will be themajor pitch diam-eters from whichthe primitive pitchcones D S E andE S F may bedrawn. The re-maining parts ofthe wheel maytbeo be laid off in 46^ f:THE RAILROAD AMD; [January, i9gl, Fig- 365. the same way as described for wheels whose axes are at rightangles to each other. Fig. 366 represents a pair of wheels whose axes are at anangle of 135 degrees to each other. The method of drawingsuch a pair of wheels will be sufficiently obvious from the pre-ceding explanations. OBLIQUE PROJECTION OF A BEVEL PINION.*Let the pinion be, in the first instance, regarded as situatedin a position par-allel to the ver-tical plane, andconstruct ac-cordingly its pro- ,jections at and transfer the .^edge view to , giving to theaxis S O the re-quired inclina-tion to a verticalo r horizontalline ; and projectupon the hori-zontal center lineAB oi fig. 369 thevertices 0, 0\ Sof the variouscones employedto determine thedirection andconstruction ofthe teeth. Theteeth themselvesare then to beprojected uponfig. 370 in themanner alreadydescribed in ref-erence to spurwheels, observ-ing that all iheir * The followingexplanation and theengravings illustrat-ing it are taken fromthe
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
