A handbook on the teeth of gears, their curves, properties and practical construction (1885)
Grant, George B. (George Barnard), 1849-1917 · [Boston] · leaf 20
erfect as long as the curvesremain in contact, and this is a property of the greatest practical value,which gives the involute a great advantage over every other known or pos-sible curve. The curve of any gear tooth must of necessity be a rolled curve formedby a fixed object attached to the plane… … EXTERNAL EPICYCLOIDS. 17 ITS UNIFORM PRESSURE AND FRICTION. The point of contact oi the two involutes C and D will always be upon thestiai<?ht line of action mn, the common tangent of the two base circles,commencing at its point of taugeucy with one circle, and ending at the samepoint on the…
Gearing
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