US1004770A

US1004770A - Exhaust-nozzle for locomotives.

Info

Publication number: US1004770A
Application number: US60045811A
Authority: US
Inventors: John L Galloway; Thomas Galloway
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-01-03
Filing date: 1911-01-03
Publication date: 1911-10-03
Anticipated expiration: 1928-10-03

Description

J. L. & T. GALLOWAY. EXHAUST NOZZLE FOR LOCOMOTIVES.

APPLICATION FILED JAN.3,1911.

Patented Oct. 3, 1911.

2 BiHEETS-SHEET 1.

WITNESSES U) Q- AJ COLUMBIA PLANOGRAPH c0., WASHINGTON. D. c.

J. L. & T. GALLOWAY. EXHAUST NOZZLE FOR LOCOMOTIVES.

APPLIGATION FILED JAN. 3,1911.

Patented Oct. 3, 1911.

2 SHEETS-SHEBT 2.

4A a; @122 V /MM $14; M ATTORNEY.

WITNESSES FFTD.

JOHN L. GALLOWAY, OF VALLEY JUNCTION, IOWA, AND THOMAS GALLOWAY, OF CORLISS, WISCONSIN.

EXHAUST-NOZZLE FOR LOCOMOTIVES.

To all whom "it may concern;

' county of Polk, and State of Iowa, and at Corliss, county of Racine, and State of WVisconsin, have invented new and useful Improvements in Exhaust-Nozzles for Locomotives, of which the following is a specification.

Our invention relates to improvements in exhaust nozzles for locomotives, traction engines, etc.

The object of this invention is to provide an improved construction, whereby the capacity of the nozzle may be automatically varied to suit the requirements for steam delivery. Under light loads, it is not necessary to force the draft to any great extent and a small quantity of steam is therefore discharged through the nozzle into the smoke stack. here the nozzle is of uniform size under all conditions, it follows that with a nozzle of sufficient capacity to receive the full charge of steam desired to be delivered under heavy load, the small quantity of steam delivered for a light load becomes dissipated in force before reaching the stack, owing to expansion in the nozzle. But with an automatic variation of the nozzle capacity, the full force of the steam may be approximately exerted whether the load be heavy or light.

Our invention also has for its object, certain structural improvements which will be apparent from the description.

In the following description, reference is had to the accompanying drawings, in which- Figure 1 is a vertical sectional view of our improved nozzle, showing the automatic valve in closed position. Fig. 2 is a similar view of one side of the nozzle in vertical section, showing .the valve in open position. Fig. 3 is a cross sectional view, drawn through the nozzle immediately above the valve, and showing one segment of the valve in section, drawn to a lower plane, cutting the central portion thereof, the valve being shown in closed position. Fig. 4 is a similar view of a half portion of the nozzle, showing the valve in open position. Fig. 5 is a view, similar to Fig. 1, but showing a modified form of valve in closed position.

Like parts are identified by the same ref- Specification of Letters Patent.

Application filed January 3, 1911.

Patented Oct. 3, 1911.

Serial No. 600,458.

erence characters throughout the several views.

A nozzle casing A is provided with a tapered upper end portion a and is also provided with a series of slots .9, which slots constitute relief ports for the nozzle. The slots extend segmentally in the wall of the nozzle, preferably substantially at the junc tion between the tapered portion a and the vertical sided portion below it. The casing is provided with an outwardly extending flange B, whereby the device may be secured to a suitable support within the smoke box of the engine and suitably connected with the steam supply duct leading from the engine.

The casing A is provided with a second outwardly extending flange C, upon which, in the construction shown in Fig. 1, an

expansible ring valve is mounted, comprising a serles of segments D connected by a coiled spring E, said spring preferably encircling the series of segments and being seated in a channel (Z in the outer surfaces of said segments. Each of said segments D is adapted to close one of the slots 8 when moved inwardly to the position shown in Fig. 1, said segments, however, being movable outwardly radially on-the upper surface of the flange C, thus uncovering the slots or ports 8.

An auxiliary casing F, having a generally cone shaped form, is mounted upon the flange C, with which it preferably has threaded engagement, as indicated at This casing provides an annular passage between it and the portion a of the main nozzle casing, whereby when the valve segments D are in open position, steam is permitted to pass through the ports 8 and upwardly in this annular space G. The walls of this auxiliary casing F extend beyond the upper end of the wall portion a, as clearly shown in Fig. 1. These conically tapered walls a and F constitute the nozzles proper and the diameter of the opening at the upper end of the wall F, is greater than the diameter of the opening at the upper end of the wall a, the capacity of these openings being calculated with reference to the amount of steam to be delivered through them, so as to secure a concentration of steam into the stack.

Guide pins H mounted in the auxiliary casing wall F, project inwardly into suitable channels or sockets in the valve segments D, and thus prevent the valve segments from rotating.

Referring to Fig. 5, it will be observed that the main nozzle casing r is provided with a tapering upper wall portion a, similar in form to that shown in Fig. 1 and provided with similar slots 8. The casing A is also provided with a connecting flange B and a supporting flange C, similar to the corresponding flanges B and C in Fig. 1. An auxiliary casing F is mounted upon the flange C in substantially the same manner as in Fig. 1, although this casing is slightly diiferent in form. The casing F is, however, provided with a tapering portion extending beyond the portion a, so that the portion a and F constitute nozzles in the same sense that the portion a and F con-- stitute nozzles in Fig. 1. The principal difierence between the two structures consists in the form of valve employed to control the delivery of steam through the ports 8 (or s). In Fig. 5 we show an annular vertically sliding valve D having an inward offset J between its upper and lower margins. This valve moves upwardly to closing position and seats against a screw threaded ring stop K. It is lifted resiliently by springs L socketed at L in the flange C and arranged with the upper ends of the springs socketed in the valve ring D at M.

lVith either of the above described constructions, a delivery of steam under light load and in quantity proportioned to the load will be taken care of entirely by the inner nozzle casin A in Fig. 1 and A in Fig. 2. Under heavy load, however, a greater quantity of steam will be delivered, and when this steam becomes excessively throttled in the opening provided by the tapered wall portions A, suhicient back pressure will be developed to force the valve segments D outwardly in the structure shown in Fig. 1, or to force the ring valve D downwardly in the structure shown in F ig. 5 under the pressure of the steam exerted upon the shoulder or oii'set J. In either case, the valve will be moved to open position, whereupon a portion of the steam will be permitted to pass through the ports 8 or 8 into the space G (Fig. 1), or G (Fig. 5), and the greater capacity of the outer nozzle casing will in either case take care of the excess steam thus permitted to discharge.

It will be observed in Fig. 1, that the walls F and a are parallel, while in Fig. 5, the walls converge upwardly to some extent. The feature of structure thus indicated is not essential, nor peculiar to either type of nozzle. The walls may be substantially parallel in either case, or there may be a slight convergence in order to more effectively concentrate the steam in the annular space between the two walls. It will also be understood that while we have shown and described two difi'erent forms of valve as adapted to our purposes, we do not limit the scope of our invention to any specific type of valve for controlling the delivery of steam through the ports 3. It is not even essential that the valve should be automatic, but we prefer to make it automatic in order to avoid the necessity for manual adjustments and also to provide for continuous adjustments under the varying conditions due to changes of grade load, etc. The stop K (Fig. 5) is made removable merely for structural pur poses, whereby-we are enabled to adjust the ring D into and out of position of use.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. An exhaust nozzle for locomotives, consisting in the combination of inner and outer nozzle casings having their lower portions connected with each other and their upper portions tapered inwardly and constituting steam passages of different size, the outer casing being extended beyond the inner casing and provided with a larger discharge orifice forming a common outlet for both passages, and the inner wall being provided with ports affording communication between the inner and outer passages.

2. An exhaust nozzle for locomotives, consisting in the combination of inner and outer nozzle casings having their lower portions connected with each other and their upper portions tapered inwardly and terminating in discharge orifices of difierent size, the outer casing being extended beyond the inner casing and provided with a larger discharge orifice forming a common outlet for both nozzle casings, and the inner wall bein provided with ports affording communication between the interior of said casing and the annular space between the casings, together with valves regulating the delivery of steam through said ports.

3. An exhaust nozzle for locomotives, consisting in the combination of inner and outer nozzle casings having their lower portions connected with each other and their upper portions tapered inwardly and terminating in discharge orifices of different size, the outer casing being extended beyond the inner casing and provided with a larger discharge orifice forming a common outlet for both nozzle casings, and the inner wall being provided with ports affording communioation between the interior of said casing and the annular space between the casings, together with automatically closing valves regulating the delivery of steam through said ports, said valves being adapted to open under a pre-determined pressure within the inner casing.

l. The combination with a nozzle casing having a tubular interior passage and afwall portion tapering upwardly and contracting said passage to a discharge orifice at the upper end of the casing, an auxiliary casing encircling the upper portion of the first mentioned casing and providing an annular passage between the casings, said auxiliary casing receiving the contents of both passages at its upper end and also having tapered walls terminating upwardly in a dis charge orifice of larger size than the first mentioned casing orifice and at a point beyond the first mentioned casing, said first mentioned casing being provided with ports communicating between its interior and the annular space between the casings.

In testimony whereof we afiix our signatures in the presence of two witnesses.

JOHN L. GALL'OVVAY. THOMAS GALLOVVAY. Vitnesses LEVERETT C. WHEELER LYMAN Gr. WVHEELER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.