Abstract
MR. BRIX seems to have solved only the simple case of a valve worked by an ordinary eccentric. There are other good graphical solutions—for example, by Coste and Maniquet in a modified form of the Reauleaux diagram, which gave accurate results. Mr. Harrison's diagram is more general and is applicable to link and radial valve-gears and to all motions which are composed of a simple harmonic vibration with a small octave superposed. It may be used for velocities and accelerations as well as mere displacements. As to calculating the distance OC by the formula R2/2L, instead of using the construction of the circular arc, this is a matter of no importance because there is no appreciable difference in the answers.
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PERRY, J. Valve Motions of Engines. Nature 62, 31 (1900). https://doi.org/10.1038/062031c0
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DOI: https://doi.org/10.1038/062031c0
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