The principles of pattern making, written specially for apprentices and students in technical schools (1900)
Horner, Joseph Gregory, 1847-1927 · London, New York, Pitman · leaf 90
taken at 12 teeth. Shouldpinions of smaller teeth be wanted, as occasionallyhappens, they are struck with the same circle, theeffect being to impart convex and undercut flanksthereto. Above 12 teeth all flanks are concave andspreading. It occasionally happens that for specially stronggears, or… … Fig. 62. Bevel Wheels. {5169) To face page 76 GEAR WHEELS—PATTERNS. 77 ever be struck out by rule of thumb, merely to pleasethe eye. They should invariably be designed on somerigid principle. There is no method which for sim-plicity and accuracy can even compare with the em-ployment of cycloidal…
Patternmaking
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