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angle application base circles blocks for figures Cinematique circle arc clearance curves cloth cycloid describing curve diameter draw drawn edition engravings epicycloidal gearing epicycloidal teeth Epitrochoidal equal equation faces and flanks form of gearing form of tooth gear teeth gives graph hence hypocycloid Hypsometry i2mo i8mo Illustrated inclination index number instru instrument involute teeth laid larger wheel latter line of action line of centers logarithmic spiral Modified Willis multiplier number of teeth obtained odontograph curve osculate pair of wheels perpendicular pitch circle pitch line plates point of contact Prof rack and pinion radial flanks radii radius of curvature rolling circles rolling curves scribe template setting the odontograph side Steam Engine suppose teeth with radial theory thickness of tooth tion tooth face tooth-curves tracing point U. S. Army U. S. Navy Willis odonto Willis odontograph wood cuts
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