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 35
pair verynear to size, for any inaccuracy can be balanced only by a proportionallylarger inaccuracy of the mate gear. If the smaller gear of a pair that areproportioned six to one is as much as -^^ of an inch under size, the largergear must be turned g^, or y\ inch under size, and this is enough to… … To make an angle templet by the use ofthe table of chords, draw an arc ad onpaper or sheet metal with the dividers setto six inches. Then set the dividers to thechord of the angle and lay it oft on the arc,as at b c. Cut to the lines b o and c o. Similarly, an angle drawn on paper canbe measured by…
Gearing
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