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Hydraulic Elevators: Their Design, Construction, Operation, Care and Management (Classic Reprint) by William Baxter (Paperback / softback, 2015)

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Excerpt from Hydraulic Elevators: Their Design, Construction, Operation, Care and Management The principal mechanism of a hydraulic elevator is very simple, although it does t appear to be so from casual inspection of a first-class installation in a large office building. This is due mainly to the fact that the apparatus is all of large dimensions and so disposed that only a portion of it can be seen from any one point. It is also due to the fact that a number of small parts are added, the function of which is to contribute to the perfection and safety of operation. The principle of operation of the hydraulic form of elevator is as simple as the construction of the mechanism, and consists in utilizing the force developed by the pressure of water in a hydraulic cylinder to lift a weight, which generally is the elevator car, but in some cases is t. The water under pressure that supplies the elevator cylinder may be derived from street mains, from an open tank placed on an elevation (for example, the roof of the building), or from a pressure tank placed in any convenient location. The simplest form of hydraulic elevator is illustrated diagrammatically in Fig. 1. The car is suspended from one or more ropes that pass over a sheave A, located at the top of the elevator well, and run down to the upper end of a piston rod R. This rod carries at its lower end a piston P that fits watertight in the lifting cylinder C. Water under pressure is admitted to the cylinder above the piston, through the pipe I, and the piston is thereby forced downward, hoisting the car. To make the apparatus complete, elementally, all that is required is a valve in the pipe I which, when turned in one direction, will connect the cylinder with the pressure tank, or other source of supply, and when turned in the other direction will stop off the supply from the pressure tank and connect the upper end of the cylinder with a discharge tank. When moved to the central position, it must close the outlet from the cylinder so that the water contained therein cant escape. It is evident that when the water is permitted to flow out of the upper end of the cylinder, if the elevator car weighs more than the piston P, the piston will run up and the car will run down. 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 techlogy 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.

Product Identifiers

Publisher
Forgotten Books
ISBN-10
1332017347
ISBN-13
9781332017348
eBay Product ID (ePID)
216293331

Product Key Features

Author
William Baxter
Format
Paperback / Softback, Trade Paperback (US) ,Unsewn / Adhesive Bound
Language
English
Topic
Popular Science

Additional Product Features

Content Note
Black & White Illustrations
Date of Publication
27/09/2015
Country of Publication
United States

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Hydraulic Elevators: Their Design, Construction, Operation, Care and Management (Classic Reprint) by William Baxter (Paperback / softback, 2015)

About this product

Product Information

Product Identifiers

Product Key Features

Additional Product Features

Best Selling in Books

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Meghan and Harry by Lady Colin Campbell Hardcover

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