Compound Locomotives (Paperback)

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. 1893 Excerpt: ...diagonally across the receiver pipe in such a way as to prevent the steam admitted to the l. p. cylinder from backing up against the h. p. piston and reducing its power. This flap valve is connected to a hollow piston T by means of the link U. Around the wall of the cylinder in which the hollow piston T is loosely fitted is an annular steam chamber E E connected with the pipe L. Through this cylinder wall there are eight 5 inch holes at / / and through the wall of the hollow piston T( there are also eight holes, inches diameter at K K, which, when the piston T moves outward, correspond with holes / /, and steam from E will then pass through into T. T also has eight holes M M at its inner end, and as these holes, when the intercepting valve is closed, are outside of the end of the cylinder, steam will pass out through them into the space N below the intercepting valve and on to the l. p. steam chest. The head W, on the back end of plunger cylinder, Fig. 79, is chambered out as shown at 5 5. In the back end of the hollow piston T is a solid plunger P. This plunger extends through a hole Y in the inner wall of the head into the chamber 5 5 fitting loo'sely in Y. From the annular space E E through the inner wall of the head at ZZ are two holes (one top and one bottom) inch diameter into the chamber.S S for the passage of steam to operate on the plunger P in closing the intercepting valve 0. The dimensions of these parts are as follows: Fig. 81. Details of Cab Connections--Rogers Intercepting Valve. Diameter of the hollow piston T outside, 3 inches. "" ""inside, 2% inches. Stroke to close 0, about 5 inches. Diameter of plunger P, 1% inches. When the parts are in the position shown in Fig. 79, steam is admitted through the pipe L to the annula...