Excerpt from The Engineer's and Mechanic's Encyclopaedia, Vol. 2 of 2: Comprehending Practical Illustrations of the Machinery and Processes Employed in Every Description of Manufacture of the British Empire
Jack (smoke). Another contrivance for the same purpose as the former, but acting not by a weight, but by means of the smoke or rarefied air passing up the chimney, which striking against a set of oblique vanes, fixed to a ver tical spindle, causes it to revolve with great rapidity. Upon the spindle is fixed a small bevilled wheel working into another small wheel placed upon a horizon tal axis, which has a screw cut upon the other end of it; this screw works into a wheel on the axis of the pulley that drives the spit: the latter is thus carried slowly round. The vanes should be placed in the narrow part of the chimney, where the motion of the smoke is swiftest, and should occupy nearly the whole space, so as to intercept the greatest part of the current.
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Paperback. Condition: New. Print on Demand. This book is a comprehensive encyclopedia of mechanics and engineering that delves into the history and development of tools and machinery. The author thoroughly examines the evolution of various mechanical devices, tracing their origins and improvements over time. The book offers insights into the principles of mechanics, the properties of materials, and the practical applications of engineering in different industries. The author provides detailed descriptions of specific machines, such as engines, pumps, and lathes, along with illustrations to enhance understanding. Overall, this book serves as a valuable resource for anyone interested in the history and principles of mechanics and engineering. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Seller Inventory # 9780282397203_0
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