A Treatise on the Richards Steam-Engine Indicator Manufactured by Elliott (Classic Reprint)

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Excerpt from A Treatise on the Richards Steam-Engine Indicator Manufactured by Elliott In introducing Richards' Improved steam-engine Indicator, we desire to call the attention of the numerous class who, as constructors, managers, or owners, are interested in the steam engine, to the advantages which it possesses. In the following pages all necessary information is furnished concerning the instrument and its application, and such instruction is given to those who are not already skilled in the use of the Indicator, as will enable them to employ it to the best advantage. The Indicator was invented by Watt. For some time it was kept by him a secret, but became known before his death, and to its use, now quite general, we are more indebted than to anything else for the degree of excellence which the steam engine has attained. The employment of more rapid velocities of piston, with higher pressures of steam, and higher grades of expansion, which has become so extensive, and promises ultimately to be universal, has greatly increased the importance of the Indicator, since this is the only means as yet known, by which the engineer can render himself familiar with the action of steam under these new conditions. Unfortunately every form of this instrument has hitherto failed in its application to engines of this class. The long and tremulous spring used in them was put in a state of violent oscillation by the momentum of the piston and its attached parts, and the result was a serrated figure, from which but little information could be extracted, so that, after a time, attempts to employ the Indicator in this important and rapidly enlarging field were mostly abandoned. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.