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Scientific American, Volume 22, No. 1, January 1, 1870 Journal of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures

By Various

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Book Id: WPLBN0000605063
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Title: Scientific American, Volume 22, No. 1, January 1, 1870 Journal of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures  
Author: Various
Volume:
Language: English
Subject: Literature & thought, Literature and history, Literature & philosophy
Collections: Project Gutenberg Consortia Center
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Publisher: Project Gutenberg Consortia Center

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Various,. (n.d.). Scientific American, Volume 22, No. 1, January 1, 1870 Journal of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures. Retrieved from http://www.ebooklibrary.org/


Excerpt
It has frequently been urged as an objection against the twin screw system that the double set of engines, four steam cylinders with duplicates of all the working parts called for on this system, render the whole too complicated and heavy for small vessels, preventing, at the same time, the application of surface condensation. In the engines of the Spanish gunboats, of which we annex an illustration from Engineering, the designer, Captain Ericsson, has overcome these objections by introducing a surface condenser, which, while it performs the function of condensing the steam to be returned to the boiler in the form of fresh water, serves as the principal support of the engines, dispensing entirely with the usual framework. Besides this expedient, each pair of cylinders have their slide frames for guiding the movements of the piston rods cast in one piece. Altogether the combination, is such that the total weight and space occupied by these novel twin screw engines do not exceed the ordinary single screw engines of equal power. Several improvements connected with the working gear have been introduced.

Table of Contents
Contents: (Illustrated articles are marked with an asterisk.) *Engines of the Spanish Gunboats The Torpedo Problem Sugar Making in Louisiana Sticking, or Court Plaster *An Improved Hoisting Pulley Wanted *Ferdinand De Lesseps--Chief Promoter of the Suez Canal *An Ingenious Vent Peg *A New English Patent Pulley Block Plants in Sleeping Booms *Improved Treadle Motion *Improved Method of Catching Curculios Remains of a Megatherium in Ohio Artificial Ivory American and English Kailway Practice Contrasted


 

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