Abstract
ENGINEERS want a diagram which for any position of the main crank of a steam engine (the angle θ which it makes with the inner dead point being given) shows at once, with sufficient accuracy for practical purposes, the position of the piston in its stroke, and the distance of the valve from its mid position. This is a mathematical problem. Men who are cunning in geometrical constructions ought to help the engineers; but hitherto they have not done so. In the hope of enlisting their services I venture to put before the readers of NATURE the only easy construction with which I am acquainted. It has never before been published, except to his students, by the inventor, Mr. J. Harrison, of the Royal College ot Science. Until I became acquainted with this method, I used a very laborious method of working, which necessitated the drawing of sine curves of different periods as described in my book on “Steam.”
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PERRY, J. Valve Motions of Engines . Nature 61, 152–153 (1899). https://doi.org/10.1038/061152c0
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DOI: https://doi.org/10.1038/061152c0