US685277A - Exhaust mechanism for locomotives. - Google Patents

Description

No. 685,277. Patented Oct. 29, 1901.

R. HARDING.

EXHAUST MECHANISM FOR LOCOMOTIVES.

(Application filed. Mar. 18, 1901.) (No Model.) 2 Sheets-Sheet I.

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Patented Oct 29, I90l.

R. HARDING. EXHAUST MECHANISM FOR LOCOMOTIVES.

(Application filed Mar. 18, 1901.)

- 2 Sheets8heet 2.

(l0 Mode'l.)

wuwwbo z Russell Harding UNITED STATES PATENT OFFICE.

RUSSELL HARDING, on sT. LOUIS, MIssoURI.

EXHAUST MECHANISM FOR LOCOMOTIVES.

SPECIFlCATION forming part of Letters Patent No. 685,277, dated Oetdber 29, 1901.

Application filed March 18, 1901- $erial No. 51,655. (No model.)

To all whom it may concern:

Be it known that I, RUSSELL HARDING, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented a certain new and useful Exhaust Mechanism for Locomotives, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

The object of my invention'is to so construct an exhaust apparatus for locomotives that the draft can be regulated so as to be substantially uniform during the variations in pressure of the exhaust-steam caused by the change of the point at which the steam is cut 0K in the cylinders.

Still another object of my invention is to preventthe accumulation of coke and cinders in the smoke-box of a locomotive, so that the lower flues of the boiler will not be obstructed and rendered useless.

My invention consists in certain novel features and details of construction, all of which are fully described in the following specification and pointed out in the claims affixed hereto.

In the accompanying drawings, which illustrate the smoke-box of one form of locomotive made in accordance with my invention, Figure 1 is a vertical longitudinal section. Fig. 2 is a vertical cross-section, and Fig. 8 is an enlarged vertical longitudinal section of the exhaust-nozzle and a portion of the petticoat-pipe.

Like marks of reference refer to similar parts in the several views of the drawings.

5 is the smoke-box; 6, the smoke-box front; 7, the tube-sheet; S, the smoke-stack, and 9 the boiler steam-pipes, all of the usual construction.

the extension 12 of the exhaust-nozzle 10 by means of arms 16. The petticoat-pipe 14 telescopes with a sleeve 17, carried by the upper part of the smoke-box 5 and extending into the smoke-stack 8. The sleeve 17 is preferably provided with guideways 18, in which slide guide-pins 19, on the petticoat-pipe 14. In order to raise and lower the extension 12 and attached petticoat-pipe 14, the said extension 12 is provided with trunnions 20, which work in slots 21 in the bifurcated end of a Y-shaped part 22. The opposite end of this Y- shaped part is rigidly secured to a rock-shaft 23, journaled in the sideof the smoke-box 5. Secured to one end of the rockshaft 23 is a crank-arm 24,to which is attached an operating-rod 25, which extends back to the cab of the engine to be within the control of the engineer.

When a locomotive is first started, the steam is admitted to the cylinders during a large part of the stroke, so that the exhauststeam passing out through the exhaust-nozzle 10 is under considerablepressure. If the extension 12 of the exhaust-nozzle and the petticoat-pipe 14 are in their lowest position, as shown in Fig. 1, only a small portion of the air within the smoke-box will be lifted by the exhaust passing out of the nozzle, and hence the draft will be too great. In order to overcome this, the engineer, by means of the operating-rod 25, raises the extension 12 and petticoat pipe 14. The exhaust now must raise the largest part of the air in the smoke-box, and consequently the draft is reduced. As soon as the engine has reached its normal speed the steam will be out off in the cylinders at an earlier point, and hence the pressure of the exhaust will be less and the draft will decrease. In order to over come this, theextension 12 and petticoatpipe 14: are lowered, so that'a smaller amount of the air in the smoke-box must be lifted, thus restoring the draft to its normal condition. This lowering of the extension and petticoat-pipe also brings the flared portion 15 of the pipe closer to the bottom of the smoke-box, and thus enables the draft to carry out the light cinders and coke col lected in the bottom of the smoke-box, which it would not be able to do if the parts were in their raised position. This prevents the clogging of the lower fines and the consequent loss of their usefulness.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. The combination with the smoke-box of a locomotive, of a smoke-stack leading therefrom, an exhaust nozzle situated in said smoke-box, a etticoat-pipe projecting into said smoke-stack and having a flared lower end terminating above the outlet of said exhaust-nozzle, and means within the control of the engineer for raising and lowering said petticoat-pipe.

2. The combination with the smoke-box of a locomotive, of a smoke-stack leading therefrom, a petticoat-pipe extending into said smoke-stack and having a flared lower end, an exhaust-nozzle in said smoke-box, an extension for said exhaust-nozzle terminating below the lower end of said petticoat-pipe, and means for raising and lowering said extension.

3. The combination with the smoke-box of a locomotive, of a smoke-stack leading therefrom, a etticoat-pipe extending into said smoke-staolgan exhaust-nozzle in said smokebox, an extension for said exhaust-nozzle terminating below the lower end of said pettieoat-pipe, and means for simultaneously raising and lowering said extension and petticoat-pipe.

4:. The combination with the smoke-box of a locomotive, of a smoke-stack leading therefrom, a petticoat-pipe extending into said smoke-staclgan exhaust-nozzle in said smokebox, an extension for said nozzle carrying said pettieoat-pipe, and means for raising and lowering said extension and attached pettieoat-pipe.

In testimony whereof I have hereunto set my hand and affixed my seal in the presence of the two subscribing witnesses.

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