US634978A

US634978A - Water-tube boiler.

Info

Publication number: US634978A
Application number: US70242899A
Authority: US
Inventors: Martin P Boss
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-01-17
Filing date: 1899-01-17
Publication date: 1899-10-17
Anticipated expiration: 1916-10-17

Description

No. 634,978. Patented Oct. I7, |1899.

M. P. BOSS.

wATEn TUBE BolLER.

(Application led Jan. 17, 1899.)

(No Model.)

I' I u i narnia STATES MARTIN I. BOSS, OF` SAN FRANCISCO, CALIFORNIA.

WATER-TUBEBOILER.

SPECFICATIONforming part Vof' Letters Patent N0. 634,978, dated October 17, 1899. Application filed January 1'7, 1899. Serial No. 702,428, (No model.)

To @ZZ wwm it may concern.'

Beit known that I, MARTIN P. Boss, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in lVater-Tube Boilers; and Ido herebydeclare that the following is a full, clear, and exact description thereof.

The present invention relates more especially to the construction of the lines of water-tube boilers, and more particularly to that character of boilers fully shown and'described in the application for Letters Patent filed by me in the United States Patent Oiice on .the 26th day of September,v 1898, which application bears Serial No. 691,932.

In my aforesaid application forLetters Patent the i'lues within which the water-tubes are arranged areV so constructed as to permit the flame to ascend and descend without obstruction, and as a consequence I have ascertained by practical working that the circulatory Water does not receive the full benefit of the heat of the iiame or products of combustion surrounding or enveloping the water-tubes.

The object of the present invention is to create a saving in fuel required to properly heat the water circulatingr through the water tubes and cylinders of the boiler, while at the same time-obtaining the maximum efficiency of the hot products of combustion carried through the fines; and itV consists in so arranging the lines that the flame or products of combustion will be somewhat retarded during travel from the fire-chamber to the chimney and be driven against the water-tubes throughout the entire length thereof. To this end the flue-walls are made zigzag or staggered, so that the flame and hot products of combustion will be arrested as carried therethrough and deflected against the water-tubes arranged therein. By thus impeding the flames and hot products of combustion during travel the. heat is confined for a longer period Within the iiues, and the same is better directed against the water-tubes grouped or nestled therein, thus acting as though the heatingsurfaces of the watercirculating pipes were increased.

In order to comprehend the invention, reference must be had to the accompanying sheet of drawings, forming a part of this application, whereinfp Figure l is a vertical cross-sectional view of the boiler7 the same being taken through the fire-chamber and first series of tubes. Fig.2 is a similar view of boiler, taken through the last series offlnes andthe base of the chimney; and Fig. 3 is a longitudinal cross-sectional top plan view taken on line nc fr, Fig. l.

In the drawings the lettersA and B are the two cylinders connected bythe separated series or groups of tubes C G.

D is the fire-chamber, and F the base of the chimney.

The group of tubes C and C', it will be noticed, are separated by a wall H, which forms the dues D D2, Within which the groups of tubes C C are located. At the upper portion these flues are enlarged or widened out in order to provide or form a' flue F in proximity to the upper cylinder B, said widened flue extending across the two series or groups of tubes, thus providing ample capacity for .the hot currents to pass from series C to series C'.

The foregoing parts are the same in arrangement and operation as the corresponding parts set forth and described in my aforesaid application, Serial No. 691,982, to which reference is hereto made. Hence detailed description thereof is deemed unnecessary in the present application.

For the purpose of retarding the travel of the fiame and hot 4products of combustion through the water-tube iiues D D2 in order to confine the same and drive it during travel directly against the group or series of tubes C C, located therein, each flue :is constructed with the inwardly-projecting shelves or shoulders l 2, which are so arranged as to alternate from side to side of the line. The clearance or passage-way thus left between the watertubes and the inner wall of the fines is of such a character that the dame or hot products of combustion will not travel in astraight line, but be deflected from side to side during travel thereof through the flues within which the water-tubes are situated. This construction -of the walls of the flues D' D2 causes the flame or hot products of combustion to travel in a zigzag or staggered direc- IDO l heat to be obtained by such retardation of the flame or hot products of combustion within the tlues. Where the llame or hot products of combustion simply envelop the water-tubes and ow or travel through the flues uninterrupted, much heat is lost to the circulating ,water within the tubes, which is recovered or conserved by constructing the flues as herein described, as the llame or hot products of combustion are forced to flow in a zigzag, staggered, or serpentine pathway and during the entire travel constantly thrown against the water-tubes situated Within the ues. Consequently with the same amount of fuel better results are obtained by this construction of the lines than wherethe tubes are simply enveloped by the fiame or hot products of combustion, hence permitting the boiler to be worked more economically. This feature is of importance in this class of mechanics and will be highly appreciated by users in such portions of the country where fuel is exceedingly expensive or high.

In operation the travel of the 'dame or hot products. of combustion from the fire-chamber D to the chimney E is the same as that described in my aforesaid pending application, Serial No. 691,932, excepting that the same travels through the flnes in a zigzag or staggered direction, as indicated by arrow 3- 't'. c., the same is lirst drawn against shoulder or projection l, thence deflected against vshoulder 2,' thence upward against second shoulder or projection l, and so on upward through the first line C, being drawn across through flue F and downward through flue C toward the chimney, during its downward travel alternately imping'ing against shoulders or projections 2 l.

While the travel of the dame or hot products of combustion is retarded, the shoulders or projections l 2 are so arranged proportionate to the length of the flues C C as not to interfere with the draft of the chimney.

Having thus described my invention, what I claim as new, and desire to secure protection in by Letters Patent, is-

Tl. A Water-tube boilerhaving a plurality of series groups or nests of water-tubes connecting two water-cylinders, said series groups or nests being separated and their spaces in which they are confined forming fines which communicate successively to give alternate currents in opposite directions,each flue being provided with shoulders on its opposite sides extending transversely of and substantially into contact with said Water-tubes, the shoulders on one side being staggered relative to the shoulders on the other side, whereby the llame or current of hot products of combustion is caused to travel in a zigzag direction through said Water-tubes, substantially as described.

2. In a water-tube boiler of the described character, the combination with the watertube space, of a partition subdividing the saine into distinct flues, a series or group of water-tubes located in each flue, a staggered, zigzag or serpentine passageway for the flame or hot products of combustion in each water-tube iiue extending longitudinally of said water-tubes, and of a connecting-flue for the said water-tube fines.

3. In a water;tube boiler of the described character, of a plurality of water-tube fines, a series or group of water-tubes located in each tine, a series of shoulders or projections secured to the side walls of each tine at points diagonally opposite each other and extending transversely of and substantially into contact with the water-tubes so as to form a zigzag, staggered orserpentine pathway between the water-tubes and the Walls ot' the flues through which the flames or hot products of combustion are conveyed, and of a ue forming connection between the water-tube flues.

Ll. The combination with a water tube boiler, of a furnace having a flue within which a group of the boiler-tubes is located, the opposite inner walls of said tine being provided with inwardly-projecting shoulders or ledges extending transversely of and substantially into contact with the Water-tubes, those on one wall being staggered with relation to those on the opposite wall, whereby the products of combustion will be caused to follow a zigzag path through said flue, substantially as described.

In testimony whereof I affix my signature, in presence of two witnesses, this 31st day of December, 1898.

MARTIN P. BOSS.

/Vitnesses:

C. F. PATToN, W. H. ARMSTRONG.

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