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Sept. 1, 1931. c. G. HAWLEY 1,821,638

LOCOMOTIVE BOILER

Filed July 13, 1929

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Patented Sept. 1, 1931 1,821,638

UNITED STATES PATENT office CHARLEs G. HAWLEY, OF CHICAG9, ILLINOIS, ASSIGNOR. To LOCOMOTIVE FIREBox

COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE

LOCOMOTIVE BOILER

Application filed July 13, 1929. Serial No. 378.151. .

This invention relates to improvements in locomotive boilers and especially to those equipped with thermic siphons and it con sists of the matters hereinafter described

5 and more particularly pointed out in the ap pended claims

: The primary object of the invention is to improve the action of the siphon forming a part of the Water circulatory system of the

10 boiler, by employing therein a device to coact with partions of the siphon to form a conduit therein, whereby a part of the Water entering the siphon from the bottom of the boiler, is directed against siphon surfaces re

15 moved from the inlet neck to keep the same clean against the accumulation and deposit of sediment and the like.

This object of the invention as Well as others together with the many advantages 20 thereof, will more fully appear as I proceed with my specification. .

In the drawings:-- Fig. 1 is a longitudinal vertical sectional view through the firebox end of a locomotive 25 boiler embodying my invention.

Fig. 2 is a horizontal detail section through a part of the siphon pf the boiler on an en Eged scale as taken on the line 2-2 of Fig. 1

30 É. 3 is a transverse vertical detail sec tional view through a part of the siphon as taken on the line 8-3 of Fig. 2.

Referring now in detail to that embodi ment of the invention illustrated in the draw ings, 1 indicates as a whole the firebox of a locomotive boiler comprising a flue, sheet 2, rear sheet 3, crown sheet 4 and side sheets

5. The bottom portion of the fluge sheet 2 forms the inner throat sheet 6. All of the sheets just mentioned are disposed in the manner found in fireboxes of this kind. 7 indicates the top sheet of the boiler, 8 the outer back sheet, 9 the shell and 10 the outer front throat sheet of the boiler

Several of the sheets: mentioned coact to form the front throat 11, back water leg 12 and the usual side water legs (not shgwn) all closed at the bottom by a mud ring 13.

In the shell 9 and connected to the flue sheet

50 are the usual tubes 14 through which the siphon and the number and size of such ele:

ments or siphons employed in a firebox, is of

: merges at one end into said: neck and is con- 9 nected at its other end by a rounded corner 23 with said rear wall. Such a corner, which defines a pocket in the siphonis responsible for products of combustion, pass on their way to the Smoke box not shown in the manner. Well known. 15 indicates the fuel door opening formed by coacting integral flanges of the inner and outer throat sheet 3 and 8 respec- 55 tively. The construction above described may well be taken as typical of that found in locomotive boilers now in general use.

To increase the Water circulating and steaming efficiency of such boilers, additional 60 heating elements are employed in the fire box and such elements usually draw boiler water from the front water leg or from the shell at a point in advance thereof and dis charges the same, usually through the crown sheet. As an example of such an element I have illustrated what has now become known as the Nicholson thermic siphon and with which my present invention is associated .

Such siphons are of different types but 70 they all embody the same generic principles of operation and such types by reason of dif ferenge in shape or structure have become classified as a “plain' siphon or as a “bull nose or round corner” siphon. The invention 75 as herein illustrated and as herein described is of special utility in connection with a siphon of the last mentioned kind. . .

- 16 indicates as a whole such an element or course dependent upon the width and length of the firebox. Said siphon comprises a flat hollow body 17 of substantially triangular shape open at the top and a tubular inlet 8t.

neck 18. The siphon body includes spaced side walls 19-19, front and rear end walls 20 and 21 respectively and a downwardly and forwardly bulged bottom portion 22 that 0 the term “bull nose or round corner as em ployed in connection with such a siphon to distinguish it from one where such a corner is not employed. Such a bull nose or round

- corner siphon is often desired because it per mits the use of a lower and longer brick arch 100

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(not shown) without bringing the rear end thereof too close to the crown sheet.

The walls 19-19 of the siphon are connect ed together by staybolts 24 and the top end of the sides and end walls of the siphon are flanged outwardly as at 25 to engage and be secured in a suitable opening provided therefor in the crown sheet. The bottom end of the neck is engaged in and welded to the flexible diaphragm portion 26 formed in the throat sheet.

In operation, the siphon is subjected to the heat of the burning fuel in the firebox and this, of course, raises the temperature of the water in the siphon and a portion is generated into steam. Such steam and the water in the siphon being displaced by the heavier water from the neck 18 and the lower part of the boiler, passes upwardly to be discharged into the boiler space above the crown sheet. This action results in the entrance of water from the throat and through the neck 18 at high velocity. As the water enters the larger body from the neck, its velocity is reduced, with a corresponding reduction in action as far as concerns the washing or cleaning the rear ward interior parts of the siphon, which are relatively remote from the neck.

To overcome this condition, I provide in the siphon an elongated bar or member 27 which extends from a point approximately in the plane of the front end wall 20 of the siphon body to a point substantially within the nose or corner pocket 23 of the siphon, as best shown in Fig. 1. This bar 27 is sup ported by the staybolts 24, preferably by means of one or more yokes 28. It is pointed out that said narrow plate or bar is disposed just above the bulge along the bottom of the

40 siphon and is made narrower than the dis stance between the side walls of the body so as to leave spaces 29-29 between the side walls 19 of the siphon and said bar or strip.

Thus as the water enters the inlet neck, a part thereof will pass under said bar which together with the bulged bottom of the si phon forms a ductor channel positively di recting a considerable volume of said water into the rear end or corner pocket 23 of the siphon, to keep it clean. Some of the water which moves beneath said bar will pass up through the spaces 29-29 between said plate and siphon walls together with the steam evolved to mingle with the mixture of wa ter and steam in the body and pass upward through the discharge mouth into the water space above the crown sheet. However, even though the velocity of the water in the bulged bottom 22 of the siphon becomes reduced be cause of parts of the same escaping up through the spaces 29-29 mentioned, suffi cient velocity remains to provide that clean ing action desired throughout the extent of the bulge and in said corner pocket 23 of the

1,821,638 siphon to prevent the accumulation of sedi ment therein.

By arranging the bar or strip under the staybolts of the bottom row, a relatively smooth surface is presented to the water in the bottom or bulged portion of the siphon, so that resistance to and disturbance of the longitudinal or distributive flow of said water in said bulged portion 22 is reduced to a minimum.

While in describing my invention, I have referred in detail to the form, arrangement and construction of the several parts there of, the same is to be considered merely as illustrative so that I do not wish to be limited thereto except as may be specifically pointed out in the appended claims.

I claim as my invention:-

1. In combination with a locomotive boiler firebox, a thermic siphon disposed in said firebox and having a high velocity inlet end and a lower velocity outlet end opening through two different sheets of the firebox there being a pocket in said siphon between said ends, and a member in said siphon and coacting with a part of the same to direct a portion of the high velocity water enter ing the inlet end toward said pocket.

2. In combination with a locomotive boil er firebox, a thermic siphon disposed in said firebox and having a high velocity inlet end and a lower velocity outlet end opening through two different sheets of the firebox there being a pocket in said siphon between said ends, and a member in said siphon co acting with the bottom portion thereof to form a duct for directing a part of the high velocity water entering the inlet end into said pocket.

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3. In combination with a locomotive boil- 10:

er firebox, a thermic siphon disposed in said firebox and having a high velocity inlet end and a lower velocity outlet end open ing through two different sheets of the fire box there being a pocket in said siphon be-, tween said ends, and a member in said siphon spaced from the side walls thereof and co acting with the bottom portion of the siphon to form a duct for directing a part of the high velocity water entering said inlet end into said pocket and permitting some of the water in said duct to pass upwardly through the space between said member and the side walls of the siphon.

4. In combination with a locomotive boiler firebox having staybolted side walls, a ther mic siphon disposed in said firebox and hav ing a high velocity inlet end and a lower velocity outlet end opening through two dif ferent sheets of the firebox there being a pocket in said siphon between said ends, and a substantially flat member, supported from stay bolts near the bottom of the siphon and coacting with said bottom of the siphon to

1,821,638 direct a portion of the high velocity water entering said inlet end into said pocket.

5. In combination with a flat tubular siphon having a staybolted body and a bulged

5 bottom portion extending at one end beyond the body to form a high velocity inlet neck there being a pocket in said body spaced from said neck, a member supported by some of the stay bolts and disposed substantially

10 parallel with said bulged portion and co acting therewith to form a duct open at both ends and spaced laterally inward from the side sheets of the body one end of said duct terminating near said pocket.

15. In testimony whereof, I have hereunto set my hand, this 8th day of July, 1929.

CHARLES G. HAWLEY.

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