Recent improvements in the steam engine; containing descriptions of the more important modern engines ... being a supplement to the Catechism of the steam engine

 
9781130193503: Recent improvements in the steam engine; containing descriptions of the more important modern engines ... being a supplement to the Catechism of the steam engine

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1868 Excerpt: ...equal to the depth of the port, the purpose of which is to put the valve into equilibrium, whereby it is more easily worked. This improvement is due to Mr. Waddell; and it has been found to be useful and efficient in practice. The sole plate, condenser, and air pump of each engine are all cast in one piece; and the air pumps after being bored out are lined with brass chambers. The cylinders are formed with double bottoms, and the whole structure of the engine is of the most conscientious and substantial character. One form of screw engine employed by Messrs. Napier is the horizontal steeple kind very similar to that employed by Messrs. Ravenhill and Messrs. Maudslay. But they also occasionally use, in the case of merchant steamers, inverted engines of the forge hammer type similar to those employed by Messrs. Caird, of which a description is given at page 126. An example of Messrs. Napier's horizontal engine is given in fig. 57, which is a representation of the engines of the armour-plated steamer Rolf Krake, constructed by Messrs. Napier & Sons for the Danish navy. In the first examples of this species of engine, constructed by Messrs. Napier, the piston rods, instead of being attached to a cross head moving in guides, were attached to a great plunger which constituted the bucket of the air pump; and from the bottom of this plunger, which was cast open at one end like a trunk, the connecting rod proceeded to turn the crank. But this plan is much inferior in simplicity and eligibility to that which Messrs. Napier have since adopted, as shown in fig. 57, and which, in the application of counterweights and otherwise, resembles the form of engine introduced by me in 1852. Messrs. Day Co. The screw engine of Messrs. Day & Co. of Southampton is also of t...

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