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" In the first volume of the same work, he makes the following judicious observations on our present subject : * It has been supposed by some of the best authors that the epicycloidal tooth ,has also the advantage of completely avoiding friction ; this... "
An Essay on the Teeth of Wheels: Comprehending Principles, and Their ... - Page 98
by Robertson Buchanan - 1808 - 164 pages
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British Encyclopedia: Or, Dictionary of Arts and Sciences ..., Volume 12

William Nicholson - Natural history - 1821 - 356 pages
...the teeth of VOL. XII. the other wheel is described by the same curve revolving within the circle. It has been supposed by some of the best authors,...means true, and it is even impracticable to invent a form for the teeth of a wheel, which will enable them to act on other teeth without friction. In...
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American Edition of the British Encyclopedia: Or, Dictionary of ..., Volume 12

William Nicholson - Natural history - 1821 - 356 pages
...the teeth of VOL. XII. the other wheel is described by the same curve revolving within the circle. It has been supposed by some of the best authors,...tooth has also the advantage of completely avoiding frictinn; this is however by no means true, and it is even impracticable to invent a form for the teeth...
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Practical Essays on Mill Work and Other Machinery, Volume 1

Robertson Buchanan - Machinery - 1841 - 582 pages
...[of teeth] without friction, is perfectly impracticable, although, for a single tooth, possible" 65. In the first volume of the same work, he makes the...completely avoiding friction ; this is however by JQO means true, and it is even impracticable to invent any form for the teeth of a wheel, which will...
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