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" ... circle. It has been supposed by some of the best authors that the epicycloidal tooth has also the advantage of completely avoiding friction ; this is however by no means true, and it is even impracticable to invent any form for the teeth of a wheel,... "
An Essay on the Teeth of Wheels: Comprehending Principles, and Their ... - Page 99
by Robertson Buchanan - 1808 - 164 pages
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Pantologia. A new (cabinet) cyclopędia, by J.M. Good, O. Gregory ..., Volume 12

John Mason Good - 1819 - 482 pages
...described by the same curve revolving within the circle. It has been supposed by some of the best author* that the epicycloidal tooth has also the advantage...other has generally been taken for its measure ; this wa slight inaccuracy of conception, for it is certain that the actual resistance is not at all increased...
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Elements of Technology: Taken Chiefly from a Course of Lectures Delivered at ...

Jacob Bigelow - Industrial arts - 1829 - 584 pages
...small and as numerous, as is consistent with their strength ; for the quantity of friction necessarily increases with the distance of the point of contact from the line of centres. Spiral Gear. — In common cases, the teeth of wheels are cut across the circumference,...
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Elements of Technology: Taken Chiefly from a Course of Lectures Delivered at ...

Jacob Bigelow - Industrial arts - 1831 - 596 pages
...small and as numerous as is consistent wilh their strength; for the quantity of friction necessarily increases with the distance of the point of contact from the line of centres. Spiral Gear. — In common cases, the teeth of wheels are cut across the circumference,...
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The Useful Arts: Considered in Connexion with the Applications of ..., Volume 2

Jacob Bigelow - Industrial arts - 1840 - 424 pages
...small and as numerous, as is consistent with their strength ; for the quantity of friction necessarily increases, with the distance of the point of contact from the line of centres. * Called the proportional radius, by Buchanan. Spiral Gear. — In common cases, the teeth...
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The Useful Arts: Considered in Connexion with the Applications of ..., Volume 2

Jacob Bigelow - Industrial arts - 1840 - 418 pages
...small and as numerous, as is consistent with their strength ; for the quantity of friction necessarily increases, with the distance of the point of contact from the line of centres. * Called the proportional radius, by Buchanan. Spiral Gear. — In common cases, the teeth...
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A Course of Lectures on Natural Philosophy and the Mechanical Arts, Volume 1

Thomas Young - Science - 1845 - 654 pages
...outline of the teeth of the other wheel is described by the same curve revoLring within a second circle. It has been supposed by some of the best authors that...which the parts slide over each other has generally lieen taken for its measure : this is a slight inaccuracy of conception, for, as we have already seen,...
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A Course of Lectures on Natural Philosophy and the Mechanical Arts, Volume 1

Thomas Young - Science - 1845 - 660 pages
...teeth of a wheel, which will enable them to act on other teeth without friction. In order to dimimsh it as much as possible, the teeth must be as small...the distance of the point of contact from the line joimng * For a demonstration of these propositions, see Airy on the Teeth of Wheels, Trans, of the...
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