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OverviewExcerpt from An Investigation of Explosion-Proof Motors The term explosion-proof, as applied by the Bureau of Mines to an electric motor, refers to a motor inclosed by a casing so constructed that an explosion of a mixture of mine gas (methane) and air within the leasing will not ignite a mixture of the same gas surrounding the motor. There are two classes of motors so constructed: First, a totally inclosed class built strong enough to withstand high internal pressures and so designed that the efficiency of all inclosing covers can be satisfactorily maintained; second, a class provided with relief openings or valves designed to relieve the pressure of an explosion within the motor casing and to cool any products of combustion dis charged through the valves. A satisfactory motor of the first class is much more expensive to build than an equally safe motor of the second class. For this rea son, attempts to make motors explosion-proof have been confined chiefly to motors of the second class. 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. Full Product DetailsAuthor: H H ClarkPublisher: Forgotten Books Imprint: Forgotten Books Dimensions: Width: 15.20cm , Height: 0.30cm , Length: 22.90cm Weight: 0.100kg ISBN: 9781333884086ISBN 10: 1333884087 Pages: 64 Publication Date: 06 August 2018 Audience: General/trade , General Format: Paperback Publisher's Status: Active Availability: In stock We have confirmation that this item is in stock with the supplier. It will be ordered in for you and dispatched immediately. Table of ContentsReviewsAuthor InformationTab Content 6Author Website:Countries AvailableAll regions |