. Bulletin - United States National Museum. Science. CATALOGUE OF THE MECHANICAL ENGINEERING COLLECTION. 31 revolution farthest from the abutment and draws it out far enough to pass the abutment previous to its arrival, and in, after passing. Steam and exhaust passages are led to the cylinder through the sleeve inclosing the main shaft. Cat. No. 251,294 AIR AND INTERNAL COMBUSTION ENGINES. The expansion of air upon being heated and its contraction on cooling has attracted the attention of many persons during the past. FIG. 10. PLATT ROTARY KNGIXE, 1862. one hundred years, and has led
. Bulletin - United States National Museum. Science. CATALOGUE OF THE MECHANICAL ENGINEERING COLLECTION. 31 revolution farthest from the abutment and draws it out far enough to pass the abutment previous to its arrival, and in, after passing. Steam and exhaust passages are led to the cylinder through the sleeve inclosing the main shaft. Cat. No. 251,294 AIR AND INTERNAL COMBUSTION ENGINES. The expansion of air upon being heated and its contraction on cooling has attracted the attention of many persons during the past. FIG. 10. PLATT ROTARY KNGIXE, 1862. one hundred years, and has led to the invention of a variety of hot- air engines. The earliest of these having real merit was patented in England in 1827 by Dr. R. Stirling. The engine consisted of two chambers filled with air and connected by pipes with each end of a cylinder whose piston received a reciprocating action by the alternate expansion and contraction of the air. In addition tlie engine was equipped with a regenerator which absorbed some of the heat of the air as it passed out of the cylinder and gave it out to the incoming air. In later improvements made by Stirling the air was compressed before heating, and an engine was designed so that the same air could be used over and over again. This attempt at mak- ing a theoretically perfect engine was more economical in fuel con- sumption than any double-acting steam engine of that time, but the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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