Polytechnisches journal, Volume 74

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Johann Gottfried Dingler, Emil Maximilian Dingler
J. G. Cotta, 1839 - Industrial arts

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Page 35 - The theorems just given may serve to show, in what points of view machines ought to be considered, by those who would labour beneficially for their improvement. The first object of the utility of machines consists in furnishing the means of giving to the moving force the most commodious direction; and, when it can be done, of causing its action to be applied immediately to the body to be moved. These can rarely be united : but the former can be accomplished in most instances ; of which the use of...
Page 35 - ... is accelerated the first half second^ and retarded the next; still it produces a constant number of vibrations in a given time, and therefore may be considered as a machine of uniform motion. The grand object in all practical cases, is, to procure a uniform motion, because it produces the greatest effect. All irregularities of motion indicate that there is some point resisting the motion, and to overcome which a part of the propelling power is wasted, and the greatest varying velocity is only...

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