s the center line of the gear at H; the small end istreated in the same way, which locates the center for ^^ PATTERNS FOR CAST GEARS 123 that end at I. The dimensions of tooth elements maybe obtained from Fig. 60. The drawing makes it clearas to how a bevel gear should be laid out. The building of… … Fig. 63. if very large. The rim at A may be left off if thoughtbest; but its presence is an advantage if it becomesnecessary to use handscrews for holding the material onthe chuck during the process of gluing, for the hand-screws may all be set to the same size, and so morequickly applied; this is…
Patternmaking
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