US830129A - Boiler. - Google Patents

Description

No. 890,129. PATENTBD SEPT. 4', 1906.

w. W. BoNsoN. BOILER. APPLIOA'MOVN FILED JUNI: 9,1903.

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' junction-box.

UNITED STATES PATENT OFFICE.

WILLIAM W. BONSON. OF DUBUQUE, IOVA, ASSIGNOR TO BONSON FURNACE AND BOILER COMPANY, OF CHICAGO, ILLINOIS, A COR- PORATION OF ILLINOIS.

BOILER.

Specification of Letters Patent.

Patented Sept. 4, 1906.

Application filed Tune 9, 1903. Serial No. 160,678.

To all whom t may concern:

Be it known that I, WILLIAM W. BoNsoN, a citizen of the United States, residing' in the city and county of Dubuque and State of Iowa, have invented. certain new and useful yImprovements in a Combined Boiler and Furnace; and I do hereby declare the following to be a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention belongs to the class known as steam boilers and furnaces, and one of the objects is to secure a rapid, positive, and uninterrupted circulation of the water through all the parts of the boiler, thereby maintaining the temperature nearly the same in the different parts of the boiler.

Another object is to provide for the unequal contraction and expansion and resultant strain therefrom, together with the loosening and breaking of the joints due to the unevenness and irregularity of the hre on the grate-bars and the varying temperature occasioned thereby, whereby the boiler is ren dered much more safe and durable.

It consists, essentially, in a boiler set over a sectional furnace provided with a grate and water-tubes and fire-brick forming a roof for the furnace and said water-tubes attached in sections to the water communication between the boiler and furnace.

For the better comprehension and more thorough understanding of my invention attention is called to the following specification, when taken in connection with the drawings accompanying the same and forming a part hereof.

Figure 1 is a longitudinal section of the boiler and furnace. Fig. 2 is an end view with forward portion of the i'ire-b ox removed.` Fig. 3 is a section of one of the junction- Fig. 4 is a section of the central Like .letters 'of reference denote corresponding parts in each of the drawings.

Referring to the drawings, A represents the upper tubular boiler provided with a shell B and front and rear Hue-sheets C and D. Into the flue-sheets are secured in any well-known manner the fire-hues G. Between the flues and the shell is a water-space E and steam-chamber F.

Beneath the boiler A is a furnace H, constructed as follows: In the forward portion of the furnace are set grate-bars I, resting upon a cross-bar J and the rear ends upon a bridgewall K, sufficiently elevated to provide an ash-box L beneath the grate. This grate forms the base of the fire-box M. Over this grate and forming a roof for the furnace are arranged water-tubes N, covered with firebrick O and asbestos or other non-conducting material P` These water-tubes with the covering also form a fire-flue Q, extending from the rear of the fire-box to the end of the furnace. By this mode of construction there is formed a sectional furnace consisting of a ire box and flue and provided with reproof material and water-tubes laid in sections to form a covering for both the iire box and flue, whereby the furnace may be easily repaired and the products of combustion from the furnace revented from coming in direct contact with) the shell of the boiler.

For the purpose of roviding a water communication between t ie boiler and the watertubes which form the arch of the fire-box and making provision for relieving the strain caused by the unequal expansion and contraction of the water-tubes when subjected to varient degrees of temperature there are secured into the boiler A water-tubes R, each of which extends downward and is united to and opens into a junction-box S. These tubes R form the front water-leg. These junction-boxes consist of a steel shell T, provided with openings s, in which the Watertubes N are secured. Within the opposite side and in a line parallel with the openings s are other openings U, which are closed by screw-plugs V. At one end of the box is another opening V, in which is secured one of the water-tubes R, and within the opposite end an opening Z, which is inclosed by a screw-plug X.

The manner in which the water-tubes N and R are secured in the junction-box is by inserting the water-tube in one of the openings s, then removing the screw-plug V, and

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inserting through the opening the tool for expanding the tube N into the openings.

The tubes R are secured in the junctionbox through the openings W by the tool inserted through the openings Z in the same manner as the tubes N in the openings s. I

have shown four ofthe tubes N in each junction-box; but it is manifesta different number may be used or only one tube with an individual junction-box may be employed. By this mode of construction of the junctionboXes and attachment of the tubes with the screw-plugs opposite of the opening of the tubes there is provided an easy access to the tubes whereby they may be secured in the box and also cleaned or inspected.

A't the rear the tubes N may be secured in the same manner as at the forward end to form the rear water-leg g but this is not an absolute necessity, as the heat is more even at the rear of the flue Q and less expansion and contraction. Hence there may be in the rear only one tube R of much larger dimension and one junction-box forming the arch of the furnace and forming the rear of the flue Q.

At the rear of the furnace and the boiler there is constructed a back connection or back combustion-chamber a, which conducts the products of the combustion from the flue of the furnace up into the iiues G of the boiler. This back connection is preferably construlcted of brick b and lined withl sheetstee It will be understood that as the waterleg and covering of the furnace is formed in section if one section should receive an VeX- cessive amount of heat, causing an overexpansion, or if for any cause there should be a sudden contraction it lwould in no manner affect the other sections, as each section is entirelyindependent of the others. Thus the life and efhciency of the tubes and furnace will be largely extended. Also if a section should become injured in any manner it can be readily replaced without disturbing the other sections of the furnace.

It will also be observed that as the water is brought to an exceedingly high temperature in the tubes N there will be a rapid circulation from these'tubes up through the rear water-leg into the boiler and an equal circulation from the boiler down through the front water-leg, and in this manner the tubes will always be kept clean and will most effectively absorb the heat.

Having now described my invention, what I claim is- 1. In a device of the character described, a vfurnace consisting of a grate, junctionboxes, water-tubes arranged in sections longitudinally along the furnace and each section entering a junction-box, fire-brick disposed along the water-tubes and forming with the water-tubes and junction-boxes a covering for the entire furnace, in combination with a tubular boiler, and water communication between the boiler and each section of the water-tubes in the furnace.

2. In a device of the charac-ter described, a furnace consisting of a fire-box yand combustion-chamber, water-tubes Larranged in seams sections, each section consisting of a plurality of tubes secured in the junction-boxes, fire-brick with the tubes and junction-boxes forming the furnace, a tubular boiler, and water communication between the boiler and each section of the covering of the furnace through the junction-boxes.

3. In a device of the character described, a boiler, a grate a bridge-wall, a flue, watertubes arranged in sections over the furnace, means disposed along said water-tubes for protecting the boiler from the direct heat of the furnace and forming a re communication With the first-mentioned flue, a water-tube connecting each section of the water-tubes in the furnace with the boiler at the front, a rear water-leg in the rear, and water communication between t'he water-tubes in the furnace and the boiler through the rear waterleg.

o4. In a device of the character described, the combination of a boiler, a fire boX and flue, water-tubes set in sections longitudinally over the fire box and flue, a junctionbox into which a plurality of water-tubes open and are secured, means disposed along said water-tubes and junction-boxes in the furnace for protecting the boiler from the direct action of the heat of the furnace and forming said Hue for leading the products of combustion from the furnace, a water-tube connecting each junction-box with the boiler and forming a water communication between the water in the tubes in the furnace and the water in the boiler.

5. In a device of the character described, a tubular boiler, a furnace set on an incline beneath the boiler and consisting of a fireboX and combustion-chamber, junctionboXes provided with openings on opposite sides, water-tubes arranged in sections and` each tube secured in one of the openings of the junction-boxes, non-combustible material disposed along the water-tubes and junction-boxes and with them forming the fireboX and combustion-chamber, a water-tube connecting each junction-box with the boiler, and a back connection connecting theV furnace with the flues in the boiler.

6. In a device of the character described, a tubular boiler, a furnace consisting of a grate, water-tubes set in sections over the grate, a junction-box for each section provided with openings on opposite sides for insertion and inspection of the water-tubes, and water communication between the boiler and each section of the water-tubes.

7. In a device of the character described, a sectional furnace consisting of a grate, water-tubes arranged in sections, a sectional protective covering disposed along said watertubes to protect the boiler and forming a flue for conducting the roducts of combustion thereto, a junction-box for each section of the water-tubes provided with openings IOO in opposite sides of the box, a Water-tube in each opening upon one side and a plug for each opening upon the opposite side, a watertube connecting each section with the tubular boiler and a back connection connecting with the flue of the furnace with the flues of the boiler.

8. In a device of the character described, a tubular boiler provided with fire-flues, a furnace consisting of a fire-box and ire-flues, junction-boxes, water-tubes set in sections and running longitudinally of the fire boX and flue and opening into the junction-boxes, non-combustible material disposed along the water-tubes and junction-boXes and forming with the water-tubes and junction-boxes a covering for the entire furnace, water communication between the boiler and the watertubes in the furnace through each junctionbox, and fire communication between the flues of the furnace and the flues of the boiler.

9. In a device of the character described, a boiler, a furnace having a fire-box and combustion-chamber consisting of water-tubes arranged longitudinally, noncombustible material, said tubes and non-combustible material arranged in sections and forming the furnace, and water communication between the boiler and the tubes in the furnace.

10. In a device of the character described, a boiler, a furnace consisting of junctionboxes, water-tubes arranged in sections and each section connected with a non-combustible material disposed along the junction-boxes and tubes and with the said j unction-boxes and tubes and forming the furnace, and water communication between the water-tubes in the furnace and the boiler through each j unction-box.

In testimony whereof I have signed my name to this Speciiication in the presence of two subscribing witnesses.

WILLIAM W. BONSON.

j unction-boX,

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