Grant, George B. (George Barnard), 1849-1917 · Boston, Grant gear works, incorporated · leaf 91
t cones so that the teeth lie directly uponthe conical surface. This method is called approximate, but itsreal error would be difficult to determine,and is certainly not as great as the inevitableerrors of workmanship of any graphical pro-cess. The tooth outline drawn by it uponthe spherical… … Tredgolds method, conjugate odontoids, and it is a matter ofvery small consequence whether or not thecurve on the sphere is the same kind of curveas that upon the cone. If the true plane in-volute curve is drawn upon the developedcone, the corresponding curve on the spherewill not be an exact…
Gearing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
