US437268A - wallwoei - Google Patents

Description

(No Model.) 5 Sheets-Sheet 2. R. WALLWO-RK & A. C. WELLS.

VAPOR BURNER.

No. 437,268. Patented Sept. 30, 1890.

(No Model.) I 5 Sheets-Sheet 3. R. WALLWORK & A. O. WELLS.

VAPOR BURNER.

Patented Sept. 30, 1890.

PETERS cdl'vmrmumm, yuan-moms u c (No Model.) I 5 Sheets-Sfieet 4. R. WALLWORK & A. 0 WELLS; VAPOR BURNER.

Patented Sept. 30,1890.

Not 137,268.

(No Model.) 5'Sheets-Sheet 5.

R. WALLWORK & A.v 0. WELLS. VAPOR BURNER- No. 437,268. Patented Sept. 30. 1890.

'TIWE t "UNITED STATES PATENT OFFICE.

ROUGHSEDGE W'ALLlVORK AND ARTHUR C. WVELLS, OF MANCHESTER,

ENGLAND.

VAPOR-BURNER.

SPECIFICATION forming part of Letters Patent No. 437,268, dated September 30, 1890.

Application filed July 18, 1889- Serial No. 317,919- (No model.) Patented in England February 16, 1888, No. 2,352, and April 20, 1889,1510. 6,738.

To all whom it may concern.-

Be it known that we, ROUGHSEDGE WALL- WORK and ARTHUR COLLINGS WELLS, subjects of Her Majesty, the Queen of Great Britain, residing at Manchester, in the county of Lancaster, Great Britain, (temporarily residing in the'city, county, and State of New York,) have invented certain new and useful Improvements in Vapor-Burners, (for which wejhave received Letters Patent in Great Britain, No. 2,352, dated February 16, 1888, and No. 6,738, dated April 20, 1889;) and we do hereby declare the following to be a full,

clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and .to letters of reference marked thereon, which form a part of this specification.

Figure 1 is an elevation, the foramlnous body being removed; Fig. 2, a top plan view, and Fig. 3 a half rear elevation and half section, of a burner constructed according to one part of our invention. Figs l and 5 are rear end elevations of a burner illustrating various modes of grouping the ejector-nozzles. Figs. 6 and 7 show in elevation and top plan View our multi-j et burner in its application to a furnace as a means for heating. Fig. 8 is a vertical sectional elevation of a burner, illustrating means for increasing the volume of air to be combined with the jet of vapor or gas. Fig. 9 is a vertical longitudinal section, partly in elevation, of a burner in which the ejector-nozzle and combining-cone are I made adjustable relatively to the regenerator or converter coils. Fig. 10 is an elevation of the framed wire-gauze used in conjunction with the combining cone or cones. Fig. 11 is a side elevation, and Figs. 12 and 13 are sections on lines was andyy of Fig. 11, of a singlejet burner provided with means for breaking up the flame-jet. Fig. 14. is atop plan view, and Fig. 15 a longitudinal section, taken on line 10 w of Fig. 14., and Fig. 16 a section taken on line .2 z of said Fig. 14., illustrating other means for breaking up the flame. Fig. 17 is a degitudinal section through the combining-cones and ejector-nozzles. Fig. 21 is an under side view of a burner such as is shown in Fig.

'14 provided with the starting and relighting jet. Fig. 22 is a rear elevation of a burner such as is shown in Fig. 5 also provided with the starting and relighting jet.

Fig.

The invention relates to'vapor-burners for use either for illuminating or heating purposes; and it has for its object to increase the efficiency of such burners in thata more perfect combustion of the vapors or gases is effected, so as to obtain a maximum heating or illuminating power from a given volume of vapor or gas.

The invention has also for its object to provide a vapor-burner adapted to the use as an illuminating or heating agent of the heavier hydrocarbons-namely, the so-called taroils, which have, prior to our invention, not

been utilized for this purpose,owing to the difficulties encountered in vaporizing these oils and admixing with the heavy vapors snflicient air to insure their combustion, so as to fully develop their heating or illuminating power.

The invention has for its further object to increase the heating or illuminating power by grouping a plurality of burners, so that a sheet-like flame or a flame of ordinary form or of the form of a brush is obtained when it is desired to obtain a great heating or illuminating power.

To these ends the invention consists in the combination of a plurality of burners grouped together for illuminating or heating purposes; also, in means for automatically relighting any one of a group of burner-jets should such become extinguished from any cause except an absolute stoppage of the flow of vapor or gas through the burner-orifice; also, in providing means for generating vapor to start a burner or a group of burners; also, in providing means for adjusting the j et-nozzle of the burner relatively to the regenerator or converter, and to devices combined therewith for admixing a further quantity of air with the gas or vapor; finally, the invention consists in structural features and combinations of parts, substantially as hereinafter described and claimed.

Referring to Figs. 1 to 7, inclusive, the burner therein shown is constructed sub stantially like the burner shown and described in our Letters Patent No. 404 064, of May 28, 1889, with the exception that two or more jet-nozzles are employed according to the volume of light or intensity of heat to be obtained, and that the said nozzles are grouped in accordance with the shape the flame is to have, and according as the burner is used for lighting or heating purposes, one or more converter or regenerative coils being used.

In Figs. 1 to 3, P indicates the burner-pipe that conducts the illuminating agent-such as a hydrocarbon oil-to the regenerator or converter coils C O, of which we have shown two, though a greater number of coils or one such coil may be employed, according to the nature of the illuminating agent. The coils C are cast hollow and have two openings 0 and a branch 0, preferably formed on the rear coil when two are used; but said branch may be formed on one of the branches that connect the two coils as will hereinafter appear. The burner-pipe P (shown) is adapted. to be pivotally connected with the supplypipe, as shown and described in our Letters 1atent, No. i0i,003, of May 28, 1889; butthe converter-c0ils may be directly and rigidly connected with said supply-pipe, as will be readily understood. The branch 0 is shown as being located at the longitudinal center of the converter-coils C but this is not absolutely necessary, as said branch may be located at any other desired point of the coil, according to the grouping of the jet-nozzles. Near the corners of the converter-coils are formed openings that are screw-threaded interiorly and are closed by screw-plugs 0 for the purpose of affording access to the interiorof the coils for the removal of carbonized matter and impurities or solid matter that maybe carried thereto with the illuminating agent. The coils C and G are connected together at their lower ends by connecting-duets c of which we have shown three; but a greater or less number may be provided, according to the nature of the illuminant. At their upper end and about the longitudinal center both coils C C are connected with a pipe G which is preferably cast integral with the coils and which extends back and has at its outer end two branches C 0 in which are secured ejector-nozzles N, whose axes lie in the plane of the axes of the openingscof the convertercoils. In front of each ejector-nozzle is arranged a combining-cone 0", through which the jet of gas or vapor is projected for combining air therewith.

In Figs. t and 5 wehave shown other modes of grouping the ejector-nozzles. As arranged in Fig. 4 a flame in the form of a sheet is produced, while in the arrangement shown in Fig. 5 the flame will assume the form of a brush, and either may be used for illuminating or for heating purposes.

In Figs. 6 and 7 we have shown the burner, Fig. i, in its application to heating purposes when a large surface is to be heated, while the burner shown in Fig. 5 may equally well be used when a smaller surface is to be exposed to the action of the flame. In Figs. (3 and 7 we have shown a furnace F-such as may be used for roasting ores or for other pnrposesthe row of jets being arranged in front of an opening at one end of the furnace leading into a fluef, (shown in dotted lines,) said fine f leading into a chimney f.

It is a well-known fact that the amount of air necessary to produce a maximum illuminating or heating power with a given area of jet-nozzle varies materially with the nature of the combustible non-luminous gas or vapor, or, in other words, with the density of such gases or vapors and the amount of carbon combined therewith-for instance, a water-gas combined with suiiicient carbonic-acid gas to render it luminous or the vapors of a light hydrocarbon require less air than a gas derived exclusively from the distillation of coal, or from distillation of heavy hydrocarbons, such as the so-called tar or pitch oils.

Various means may be employed for varying the amount of air to be combined with a jet of gas. This may, in a measure, be done by making the in j eetor-nozzle and combiningcone adjustable relatively to the eonverteror regenerator coils, as shown in Fig. 9, to increase or diminish the space traversed by the jet of flame before reaching said coils. Another advantage derived from this adjustability is that the farther the jet-nozzle and combining-cone are moved from the convcrter'coils the more will the flame spread, so that said coils may be completely enveloped thereby, and the operation of conversion of a liquid combustible into a vapor or the superheating of such vapor or of a gas promoted. In this construction the pipe (J is formed in sections, the intermediate section 0 fitting within the other two, forming a telescopic pipe, a tight joint being made by any suitable means, or the intermediate section may bean integral portion of the section connected with the regenerator-coils, and the end section that carries the ejector or ej ectors arranged for adjustment on said intermediate section U, as shown in Fig. 9.

In Fig. 8 we have shown an additional combining-cone C encompassing the combiningcone 0", whereby an additional volume of air ICC is entrained and combined with the gas or vapor by the partial vacuum formed in said combining-cones by the velocity of the jet issuing from the ejector-nozzle N.

When the illuminant used is a water-gas combined with a vapor derived from a light hydrocarbon, or the vapor of a light hydrocarbon is used, the same result may be obtained by more or less breaking up the jet of gas or vapor. This may be eifected by placing a foraminous bodysuch as a wire-gauze Gin front of the combining-cone C or 0, so as to cover the mouth thereof, to divide the jet of gas or vapor and air combined therewith during its passage through the cone or cones, as shown in Figs. 1 and 9. cases the wire-gauze G may be placed in rear of the combining-cone and produce good results.

It will be readily seen that a jet issuing from the nozzle N at a considerable velocity when projected upon the foraminous body will be divided into numerous fine jets, thereby assisting in the combination therewith of an increased volume of air, said divided jets again uniting before passing through the regeneratorooils.

The twin combining-cones, as well as the wire-gauze divider or breaker G, may be used either separately or in combination with a burner in which the jet-nozzle N and combining-cone are not adjustable, or they may be so used with a burner in which said parts are adjustable according to the illuminant used, as will be readily understood.

WVhen the illuminant used is a heavy hydrocarbon-such as are known under tar and pitch oils -it will be found of greater advantage, inasmuch as better results are obtained, to interpose into the path of the jet of flame a solid body, upon which the flame is caused to impinge and by which it is caused to recoil upon itself, thereby breaking it up into spray, if we may so term it, to more effectually combine the air therewith and to increase the volume of air combined with the jet, and this construction is shown in Figs. 11 to 17, inclusive.

In Figs. 11, 12, 13, and 17 we have shown a device B for breaking up the flame, formed either integral with one of the converter-coils or separate therefrom, to be inserted in a suitable bearing formed therein.

The breaker consists in dividing the axial space of the'coil by means of a Web or webs or partitions b or such partitions may be formed in a separate frame or casing B, Fig. 17, where the breaker or divider B is detachably connected with the coil 0 or C, thereby dividing the opening 0 into a plurality of passages b, and the rear faces of the partitions are or may be made with a knife-edge b so as to cut the flame. As the jet of flame is projected upon the'point of junction b of the partitions b which point lies in the axial plane of the jet of flame, the said flame, or a portion thereof, is causedto recoil, breaking In some;

the jet up into a spray, whereby it is more effectually combined with the air and a greater volume of air is combined therewith.

In Figs. 14, 15, and '16 we have shown a modification in the construction of the breaker B that will be readily understood without extended description, the flame being thereby divided into sheet-like jets, the partitions b projecting slightly beyond the converter-coil C, their rear faces being made with knife-edges 11 In either construction the dividers or breakers also serve as a means for heating the converter-coil with which they are connected, either directly when the breaker or divider forms an integral part of the coil or indirectly or by radiation when the breaker is detachably connected with such coil. These breakers become extremely hot, approaching a white heat, and consequently are liable to burn out, and to facilitate the replacing them we in some cases connect the same detachably with the coil, thereby also preventing the coil from becoming injured by the great heat.

It is evident that by the means describedthe liquid fed to the coils is rapidly vaporized and the vapors superheated, and owing to the great heat developed at the convertercoils but very little carbon is deposited therein. As the flame-jets issue from the openings Z) they again unite into a single jet of great brilliancy.

By means of the devices described any of the hydrocarbon oils or ordinary illuminating or other non-luminous gas or vapor may be used with the same burner, and to this end it is essential that the breaking-up devices be detachably connected with the burner, and, if desired, the double combining-cone c 0 may also be detachablyconnected with such burner, so that it may be readily removed and a single cone substituted therefor.

Various means may be provided for detachably adjusting and connecting these cones with the burner.

As shown in Fig. 18 the pipe C is provided with a beveled or dovetail groove 0 into which fitsa corresponding rib c on the combiningcone, or a tubular bearing may be formed on the cones that is fitted upon pipe (3 and held in position by a set-screw, so that in either case the cones are adjustable within certain limits on the pipe 0 relatively to the ejector-nozzle N.

When a plurality of burners are grouped together, as hereinabove described, it is desirable that means should be at hand not only for regulating the volume of the jets issuing from the nozzles N, but also for cutting out anyone or more jets of the group. To this end we provide each of the jet nozzles Witha regulating valve or needle, as best shown in Fig. 15.

The ejector-nozzle N has a screw-threaded portion at that screws into one end of the branches O and a tubular perforated stem or extension 71., the end of which is seated in an annular recess 8, formed in the end of a stufling-box B, screwed into the opposite end of said branch 0 The axial bore of the stuffing-box B is screw-threaded, and in it works the screw-threaded stem 71 of the regulating valve or needle N, that carries a hand-wheel n for manipulating the same. I) is a stutting-box gland through which the valve-stem extends. The ejector-nozzle and stuffing-box being constructed in separate parts may be readily removed for purposes of gaining access to the branch 0, when this becomes necessary from any cause, or should the perforations in the ejector-stem become obstructed the ej ector-nozzle can be readily removed and cleaned.

In burners of the class described or in multiple-jet burners there is some delay in starting or lighting the burner, as it becomes necessary to generate considerable vapor before this can be done. To avoid this we provide means whereby the burner may be readily started with a comparatively small amount of vapor, and not only started, but automatically re light-ed after the burner-light has been extinguished, purposely or otherwise, whether there is one or a plurality of jet-nozzles em ployed in a burner, and this part of our in vention is illustrated in Figs. 20 to 22, in which N is the auxiliary ejector-nozzle that has a very small discharge-orifice, and D is the auxiliary combining-cone therefor.

In starting the burner by heat applied to the converter coil or coils, suihcient vapor will in a very short time be generated to set the starting-jet into operation, and as the flame thereof impinges upon the converter coil oreoils these become heated and sufficient vapor is rapidly generated to start the main jet.

The arrangement of the starting and re lightingjet and its cone will of course depend upon the nature of the burner. In a singlejet burner they may be arranged side byside, as shown in Fig. 19, or the cone D and nozzle bl may be arranged below the cone 0 and nozzle N, both cones being in communication by means of a port (Z, so that as soon as sufficient vapor has been generated to start the main jet, and the valve N is opened, the flame in cone D will ignite the jet ofgas or vapor in cone C thus automaticallylighting such jet, as shown in Figs. 21 and The startingand lighting or relightin g ejector-nozzle N" and its combining-cone D are arranged centrally of the group of main ejector-nozzles N and their combining-cones 0", all of which cones are in communication with the cone D through the medium of a port (Z. This starting and relighting jet may be kept in operation after the main jet or jets have been extinguished, so that the conversion of the illuminant into vapor will be kept up, and so that it will only be necessary to turn the vapor on the main jet orjets to put the burner into operation.

Vhen the burner is employed for heating purposes, we prefer to pivotally connect the same with the supply-pipe so that it may be turned out of line with the draft-flue, or so that the direction of the jet or jets may be changed at will. This feature is of great advantage in heating apparatus, whether a single jet or a multiple jet is employed, since such jet or jets may then receive any desired direction so that the heat may be applied at any desired point, and when a multiple-jet burner is used the degree of heat may be adjusted between a maximum and minimum by cutting oft the supply of gas or vapor to any one or more of the ejector-nozzles.

Although we have described the use of the twin combining-cone and the use of the gauze diaphragm in conjunction with a converter of substantially parallelogrammic form, it will be understood that we do not desire to limit the use thereof with such converters, as they may be used with any regenerative burner; nor is it necessary that the opening in the converter should be a parallelogram when such opening is to be divided as described, so that converters in the form of a circular coil may be used equally as well.

We are aware that in gas or vapor burners an obstruction has been arranged in the path of the flame, but this has not been done to divide the flame into jets for the purposes set forth, but to spread the same and cause it to envelop the regenerator or converter for the purpose of heating the same.

\Vc are also aware that in some classes of lamps a spreader-disk has been applied immediately above the wick-tube to spread out the flame into a greater body than would otherwise be the case.

IVe do not desire to claim the placing of a spreader into the path of the flame, but a de vice that will elfeetually break up the flamejet projected thereupon witha certain velocity so that the ambient air may be more effectually commingled with the gas or vapor and a greater volume of air taken up by such gas or vapor, whereby the illuminating or heating power is materially increased.

ll'aving described our invention, what we claim, and desire to secure by Letters Patent, is

1. In a vapor-burner, the combination, with a jet or ejector-nozzle, a generator and a tubular connection between the two, of a plurality of open-ended and concentrically-arranged combining-concs depending from said tubular connection and interposed between the nozzle and generator, substantially as and for the purposes specified.

2. In a vapor-burner, the combination, with a jet or ejector nozzle, a generator and a tubular connection between the two, of a pluralit-y of open-ended and concentrically-arranged combining-con es depending from said tubular connection and interposed between the nozzle and generator, and a foraminous body also depending from the tubular conconnection between the same, and the gen-. crai or constructed to support said nozzle in the axial plane of the generator, and a de vice for combining air with the jet of gas or vapor interposed between the nozzle and the generator, of a foraminous body interposedv between the combining-cone and generator, substantially as and for the purposes specified.

4:. In a gas or vapor burner, the combination, with the generator or converter consisting of a tube or pipe having one orlnore convolutions, and a jet or ejector nozzle arranged in the axial plane of the generator, of an adjustable connection between the ,nozzle and generator, whereby the position of said noz zle relatively to the generator maybe varied, for the purposes specified.

5. In a gas or vapor burner, the combination, with the generator or converter consisting of a tube or pipe having one or more convolutions, and a jet or ejector nozzle arranged in the axial plane of the generator, of an adj ustable tubular connection between the generator and nozzle, and a device for combining air with the jets of gas or vapor interposed between said nozzle and generator, substantially as and for the purposes specified.

6. In a vapor-burner, the combination, with a jet or ejector nozzle, a generator and a tubular connection between the two, of a combin ing-cone interposed between the nozzle and generator and adjustable relatively thereto, substantially as and for the purposes specithe jet of flame into a plurality of jets, as described.

8. In a gas or vapor burner, the combination, with the generator or converter consisting of a pipe or tube having one or more convolutions, and having the opening or passage bounded by said convolution or convolutions of the pipe divided into a plurality of openings or passages by a partition or partitions,

- of a jet or ejector nozzle in the axial plane of the generator or converter, and a connection between the two, whereby the jet issuing from the nozzle is broken up or divided into a plurality of jets, for the purposes specified.

9. In a gas or vapor burner, the combination, with the generator or converter consisting of a pipe or tube having one ormore convolutions, and partitions detachably connected therewith and arranged to. divide the passage or opening bounded by said pipe into a plurality of passages, of a jet or ejector nozzle in the axial plane of the generator or converter, and a connection between the two, for the purposes specified.

10. In a gas or vapor burner, the combination,with the generator or converter consisting ofatube or pipe having one or more convolutions, and a casing adapted to be seated ithin the opening or passage bounded by said pipe, said casing being divided into a plurality of passages by partitions, of a jet or ejector nozzle in the axial plane of the generator or converter, and aconnection between the two, for the purposes specified.

11. In a gas or vapor burner, the combina tion, with the generator or converter consisting of a pipe or tube having one or more convol-utions, and a casing adapted to seat within the opening or passage bounded by said pipe, said casing being divided longitudinally into a plurality of outwardly-tapering passages, of a jet or ejector nozzle arranged in the axial plane of the generator or converter, and a connection between the latter and the nozzle, for the purposes specified.

12. In a gas or vapor burner, the combination, with the generator or converter consisting of a pipe or tube having one or more convolutions, the passage or opening bounded by said pipe being divided into a plurality of passages, of a jet or ejector nozzle in the axial plane of the generator, and an adjustable connection between the two, whereby the position of the nozzle relatively to the openings formed by the endless generator or converter and the partitions may be varied, for the purposes specified.

13. In a gas or vapor burner, the combination, with the generator or converter consisting of a pipe or tube having one or more convolutions, the passage or opening bounded by said pipe being divided into a plurality of passages or openings, of a jet or ejector nozzle and a combining-cone arranged in the axial plane of the generator, and a connection between the latter and the nozzle, for the purposes specified.

14. In a gas or vapor burner, the combination, with the generator or converter consisting of a pipe or tube having one or more con volutions, the passage or opening boundedby said pipe being divided into a plurality of passages or openings, of a jet or ejector nozzle and two concentrically-arranged combining-cones in the axial plane of said generator or converter, and a connection between the latter and the nozzle, for the purposes specified.

15. In a gas or vapor burner, the combination, with the generator or converter consisting of a pipe or tube having one or more convolutions, the passage or opening bounded by said pipe being divided into a plurality of passages or openings, of a jet or ejector nozzle in the axial plane of the generator, an adjustable connection between the latter and the nozzle, and a combining-cone interposed between the ejector-nozzle and converter and supported from said adjustable connection, for the purposes specified.

16. In a gas or vapor burner, the combination, with the generator or converter consisting of a pipe or tube having one or n1oreconvolutions, the passage or opening bounded by said pipe being divided into a plurality of passages or openings, of a jet or ejector nozzle arranged in the axial plane of the generator or converter, a combining-cone interposed between the nozzle and generator or converter, and a foraininous diaphragm interposed in the path of the jet of gas or vapor adjustable toward or from the combining-cone, for the purposes specified.

17. In a gas or vapor burner, the combination, with a generator or converter consisting of a pipe or tube having one or more convolutions arranged to form the boundaries of a plurality of open passages, of a jet or ejector nozzle for and arranged in the axial plane of each of said passages, and a connection between the nozzles and the generator or converter, for the purposes specified.

18. In a gas or vapor burner, the combination,with a generator or converter consisting of a pipe or tube having one or more convolutions arranged to form the boundaries of a plurality of passages, of a jet or ejector nozzle for each of said passages, a combining-cone interposed between the nozzle and converter, said nozzles and cones being arranged in the axial plane of their respective passages, and a connection between the generator and the nozzles, for the purposes specified.

19. In a gas or vapor burner, the combination, with a generator or converter consisting of a pipe or tube having one or more convolutions and constituting the boundaries of a plurality of open passages c, of jet or ejector nozzles for and arranged in the axial plane of each of said passages, a connection between said generator and the nozzles, and dividingpartitions for the passages to subdivide or break up the jet issuing from said nozzles, for the purposes specified.

20. In a gas or vapor burner, the combination, with a generator or converter consisting of a pipe or duct having one or more convolutions and constituting the boundaries of a plurality of open passages c, 01": a jet or ej ecior nozzle in the axial plane of each of said passages, a combining'conc interposed between each nozzle and its generator-passage, and partitions dividing said passages into a pluralityof such, for the purposes specified.

21. In a gas or vapor burner, the combination, with a generator or converter consisting of a pipe or duct having one or more convolutions constituting the boundaries of a plurality of open passages, of a jet or ejector 11ozzle for and in the axial plane of each of said passages, a connection between the nozzle and generator or converter, and intercoininunicating con'lbining-cones, one for each nozzle interposed between the latter and said generator, for the purposes specified.

22. In a gas or vapor burner, the combination, with the j et or ejector nozzle and a combining'cone arranged in the axial plane and in front of said nozzle, of an auxiliary jet or ejector nozzle, and an auxiliary combiningcone, and a port (1, connecting the two combining-cones, for the purposes specified.

In a gas or vapor burner, the combination, with the main jet or ejector nozzle and its combining-cone arranged in the axial plane and in front of said nozzle, of an auxiliary jet or ejector nozzle of less capacity than the main-jet nozzle, and a combiningcone of smaller size than the combining-cone for the main-jet nozzle, and a port connecting the two cornbiningcones, for the purposes specified.

2i. In a gas or vapor burner, the combination, with a group of main jet or ejector nozzles, each provided with a combining-cone in front and in the axial plane thereof, of an auxiliary jet or ejector nozzle and combiningcone arranged centrally of the group, and ports (1, connecting the auxiliary combiningcone with the main combining-cones, for the purposes specified.

.25. In a gas or vapor burner, the combination, with a group of main jet or ejector 11ozzles, each provided with a combining-cone in front and in the axial plane thereof, and ports connecting the several combining-cones of the group, of an auxiliary jet or ejector nozzie and con'lbining-cone arranged centrally of the group of main jets or nozzles and their combining-cones, and ports connecting the latter cones with the combining-cone of the an xiliary jet or ejector nozzle, for the purposes specified.

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

ROUGIISEDGE \VALLWVORK. ARTHUR C. WELLS. Witnesses:

G. E. CARPENTER, J. R. IIMvKINs.

ICC

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