The science of railways by Kirkman Marshall Monroe 1842-1921

Author:Kirkman, Marshall Monroe, 1842-1921
Language: eng
Format: epub
Tags: Railroads, Transportation
Publisher: New York, Chicago, The World Railway Publishing Company
Published: 1904-03-25T05:00:00+00:00

ENGINEERS' AND FIREMEN'S MANUAL.

FIG. 10— LOW PRESSURE PlSTQN

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ENGINEERS' AND FIREMEN'S MANUAL,

OPERATION OF COMPOUND LOCOMOTIVES. 23 COLE FOUR-CYLINDER BALANCED COMPOUND.*

In this locomotive, illustrated in drawings Figures 13 to 18, the low pressure cylinders are located in the position common to simple engines, being outside of the frames and attached by a saddle casting to the smoke arch. The high pressure cylinders are situated forward of the saddle casting and between the frames which are extended to such length as to support them. The pistons of the high pressure cylinders are connected to the forward axle, which is suitably cranked to accommodate such connections between the frames. The low pressure cylinders are connected to the rear pair of drivers. By this arrangement of cylinders long connecting rods are possible both inside and outside of the frames.

The cranks on each axle are at 90 degrees to each other and so disposed that the outside crank is at 180 degrees with its adjacent inside crank. The valves are of the piston type and the valves of both the high pressure and low pressure cylinders on one side are connected to the same valve stem and operate within a continuous valve chest which acts as a receiver between the high pressure and low pressure cylinders very much as in the design of Schenectady tandem compound. The valves are operated by the usual Stevenson link motion so that no complications are introduced in this particular. The high pressure cylinders are 15| inches in diameter by 26-inch stroke and the low pressure cylinders are 26 inches in diameter by the same length of stroke. The engine operates under 220 lbs. of steam and the outside diameter of drivers is 79 in. Applying these fig-

*Designed by F. J. Cole, mechanical engineer for the Schenectady Locomotive Works for the New York Central & Hudson River Railroad, 1904.

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