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A handbook on the teeth of gears, their curves, properties, and practical construction (1890)

Grant, George B. (George Barnard), 1849-1917 · Lexington, Mass., Lexington Gear Works · leaf 54

An illustration from A handbook on the teeth of gears, their curves, properties, and practical construction, 1890, leaf 54
If the proportion is carried to its extreme,the height being infinite as compared withthe diameter of the pinion, as in Fig. 36, the THE NORMAL THEORY OF THE GEAR TOOTH CURVE. cycloid becomes the straight line OD, and thepinion flank is the involute OD. From this itis plain that the involute, in… … Infinite Cycloidal Teeth CTOLOiDAii Lines of Contact.—The pri-mary lines of contact, in the case of the cycloid,are circles. Fig. 38, of the same diameters asthe heights of the originating cycloids. The secondary lines of contact are alsocircles. The diameter is equal to the pitchdiameter plus or…

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