Babendreier, Arthur O. [from old catalog], Maryland institute for the promotion of mechanic arts and design, Baltimore. [from old catalog] · Baltimore, Md., The Maryland institute for the promotion of mechanic arts and design · leaf 53
th in the matinggears. If the angle is 90° and both wheels have a likenumber of teeth, they are called mitre gears. In spur gears the pitch circles, etc., are considered atthe end of a short cylinder. In bevel and mitre gearsthey form the bases of the frustums of pitch cones whoseapexes meet at the… … FIG. 20 B. FIG. 20C Power Transmission 51 tangency of the two cones is the pitch line, because at anypoint throughout its length it would define the relativediameters of the gear and pinion at that point. The pitch diameters and number of teeth, as in spurgears, determine the speed ratio between…
Mechanics
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