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 170
tooth as straight lines totlie line of centers coc at an angle of 15°. Draw theoulcr half ah of the face, one quarter of the whole MECHANICAL DRAWING 82 length of the tooth, from a center on the pitch line, and may best be drawn by joints, for the odontographicwith a radius of 2.10 inches dizidcd… … Internal Gears are those having teeth cut inside ofthe rim. Use the involute odontograph for the internalgear exactly the same as for external gears; but caremust be taken to cut off the tooth at the interferencepoint i of the pinion (See Fig. 9). The point of thetocth may be left off altogether or…
Mechanical drawing
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