Notes for mechanical drawing; arranged for the use of the students of the Mechanic arts high school and the Evening school of trades (1904)
Mathewson, Frank E. (Frank Elliott), b. 1869 · Springfield, Mass. · leaf 162
rcle to which the involutethat forms the outline of the tooth is drawn. The ra-dius of the base circle is sm.aller than that of the pitchcircle, and is found by drawing a circle tangent to the Hne of action. The Face of the involute tooth is formed by the in-volute curve from the base circle to the… … Draw in order the pitch circle, line of action, radiusof base circle, base circle, involute curve from base MECHANICAL DRAWING 79 circle, and radial flank of tooth. Then draw, in order,the addendum, dedcndnm, and clearance circles; lay offthe circular pitch, on pitch circle; find center line…
Mechanical drawing
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