Model: 147 Oscillating Cylinder Engine
This engine is not a very efficient type. The cylinder is pivoted at its center to the engine frame, turning on pivot with an oscillating motion. Note the upper and lower parts in the back face of the cylinder to admit and exhaust the steam. As piston travels up, steam pressure is admitted through lower right port and exhausts through upper left port. As piston descends, steam is admitted through upper right port and exhausted through lower left port. The action of the piston rod drives the fly wheel to which it is attached by means of a crank. The inertia of the fly wheel carries the crank over the centers.
[Virginia Downward & William M. Clark, 1930]

[Editor’s Note: The oscillating cylinder engine is a form of a slider-crank mechanism and can be seen in the Reuleaux-Voigt models C-6 and D-2. This mechanism is used often in door damper mechanisms. In the 19th century the oscillating cylinder was used on steam locomotives. This Clark model was likely copied from the 1868 catalog of mechanical movements by Henry T. Brown, Figures 344 and 345. FCM]

Francis Moon 2005-00-00

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