US654975A - Compound engine. - Google Patents

Description

Patented luly 3|, I900.

w. T. HARRIS, COMPOUND ENGINE. (Application filed Apr. 17, 1899.)

3 Sheets-Sheet I,

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w. T. HARRIS.

COMPOUND ENGINE.

(Application filed Apr. 1 7, '1899.)

(No Modei.) 3 Sheets-Shaet 3.

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WILLIAM T. HARRIS, OF LOUISVILLE, KENTUCKY.

' COMPOUND ENGINE.

SEECIFICATION forming partof Letters Patent No. 654,975, dated July 31, 1900.

' Application filed April 17, 1899. Serial No. 713,311. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM T. HARRIS,a citizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certainnew and useful Improvements in Compound Engines, of

which the following is a specification.

The object of my present invention is to provide in double -cylinder steam engines in which one of the cylinders is arranged to be worked under expansion by the exhaust-steam from the other an arrangement whereby the two cylinders may be positioned parallel with and alongside each other, in combination with means by which the force of both may be transmitted to the crank of the machine to be driven.

I have designed this invention especially for use with locomotives, to which it is peculiarly adapted,'and I will-illustrate and describe the apparatusas so used, although obviously it is applicable to steam-engines of other varieties.

Referring to the accompanying drawings, which are made a part hereof, and on which similar reference characters indicate similar parts, Figure 1 is a view of the driving-wheels, steam-cylinders, pitmen, and connecting-rods of a locomotive, the boiler thereof being also shown in outline, the steam-cylinders and valve-chests being shown in section; Fig. 2, a plan view thereof, omitting the boiler and such other parts as do not especially relate to my invention; Fig. 3, atransverse sectional view on the dotted line 3 3 in Fig. 1; Fig. 4, a transverse sectional view as seen from the dotted line 4i 4 in Fig. 1; and Fig. 5, a view similar to Fig. 1, but showing the arrangement when a cylindrical valve is used instead of the ordinary slide-valve.

The locomotive shown is of the ten-wheel variety. I will omit all reference to the boiler, trucks, and such like parts which have no immediate connection with my present invention. I will also confine my description to the mechanism on one side, as that upon the other side is, as usual, substantially aduplication.

The driving-wheels 1, 2, and 3 are connected by connecting-rods at and 5, which are suitably mounted upon their wrists, and from the wrist of the wheel 2 the'pitman 6 extends back to a cross-head 7, which in turn is connected to the piston-rod 8, carrying a piston-head 9,- which travels back and forth in the steamcylinder 10 as it is impelled by the steam, all in the ordinary and well-known manner. ranged above the steam-cylinder 10 is a second and larger cylinder 11, in which travels a piston-head 12, secured in the usual manner to a piston-rod 13, which is connected to a cross- 20 of the steam-cylinder 11 and thence into 7 said cylinder 11, where it operates under expansion upon the piston-head 12 therein. As will be understood, the shaft 15 extends through to the other side of the engine and has a similar mechanism rigidly fixed to its other end. By this arrangement the power of three cylinders is at all times exerted upon the driving-gear.

- .In the principal views, as above stated, I have shown the ordinary steam-chests and an ordinary variety of slide-valves therein. These slide-valves 21 and 22 are operated by the valve-rods 23 and 24, which are connected at their outer ends by-a rocker-arm 25, and this is impelled, as usual, by a suitable connection with an appropriate moving part. This, however, as it is or may be of a substantiallyordinaryandwell-known form,need not be further described herein.

In Fig. 5 I have shown, instead of the ordinary slide-valves each having its own steamchest, a cylindrical steam chest in which a piston-valve having six heads operates, and the valve connections are modified accordin gly. This piston-valve construction is more compact than the other and is in some respects to be preferred; but the variety of steam-chest and valve is not material to my invention so long as some varietyis employed by means of which the steam maybeconducted first into the smaller steam-cylinder and after it has done its work therein thence to the larger, Where it may do further Work, my invention consisting wholly of the peculiar arrangement described, by means of which, without undue prolongation of the structure, the advantage of a double-cylinder engine Working under expansion may be Y secured in the class of steam-engines to which this arrangement of apparatus is applicable.

Having thus fully described my said invention, what Iclainl as new, and desire to secure by Letters Patent, is The combination, in a locomotive, of the driving-wheels, the connecting-rods connected to the wrists thereof, a connecting-rod running from one of said wrists to a cross head, suitable ways for said cross-head, a piston connected to said cross head, a steamcylinder in which said piston operates, a suitable valve whereby steam is admitted to and permitted to escape from said cylinder, a sec ond steam-cylinder to which the steam as it escapes from the first steam-cylinder is conducted, a piston in said second cylinder, a

cross-head to which said piston is connected,-

suitable Ways for said cross-head, a ,rock- I shaftextending through from one side to the other of the engine, a disk or rock-arm on each end of said rock-shaft, and connecting-rods running from wrists on each of said disks or rock arms to the crossheads connected with the duplicate cylinders on each side of the engine, whereby the force from .the two sets of steam-cylinders is transmitted to and exerted upon said driving-wheels, substantially as shown and described.

In witness whereof I have hereunto set my hand and. seal, at Indianapolis, Indiana, this- 12th day of April, A. D. 1899.

WILLIAM T. HARRIS. [L, s.]

Witnesses: CHESTER BRADFORD, JAMES A. WALSH.

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