US342738A

US342738A - Steam-boiler

Info

Publication number: US342738A
Authority: US
Publication date: 1886-05-25
Anticipated expiration: 1903-05-25

Description

(No Model.) 2 Sheets-Sheet 1.

J. M. DUNN & W. E. SIDWELL- STEAM BOILER. No. 342,738. Patented May 25, 1886.

i 88S I I five to %l 1} E b n r I army (No Model.) 2 SheetsSheet 2. J. M. DUNN & W. E. SIDWELL.

STEAMEBOILER- No. 342,738. Patented May 25, 1886.

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' NITED STATES PATENT OFFICE.

JOHN M. DUNN AND WILLIAM E. SlDWELL, OF NORWALK, OHIO.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 342,738, dated May 25,1886.

Application filed November 20,1885. Serial No. 183,422. (No model.)

T 0 all whom it may concern:

Be it known that we, JOHN M. DUNN and WILLIAu E. SIDWELL, citizens of the United States, residing at Norwalk, in the county of Huron and State of Ohio, have invented certain new and useful Improvements in Steam- Boilers, of which the following is a specification, reference being had therein to the accompanying drawings.

Our invention relates to steam-boilers, and has for its object the provision of a simple and efficient heater which shall have the proper circulation of water through it and very thorough circulation of heat and flame around it.

The heater consists of a curved water back or chamber mounted directly over the rear end of the fire-chamber in such way as to receive the full force of the escaping flame and heat against it, and shall cause the same to pass down under it and then up over it before escaping. This heater is attached to the sides of the boiler. The boiler is of the return-flue pattern, and has the water-chamber or boiler proper surrounding the fire-box, which latter is located centrally in the structure,with gratebars placed in it, and provided with suitable doors to the exterior of the boiler. The arrangement of circulation-pipes for the boiler and heater is such as to cause the cold water to be drawn from the bottom of the boiler, and after becoming heated in the heater to be delivered into the boiler at the top. This obviates the difliculty usually encountered in having the heat gradually work its way down in the boiler, and enables us to accelerate the heating. The construction by which we effect these objects is illustrated in the accom panying drawings, and hereinafter described, and pointed out in the claims.

In the drawings, Figure 1 is acentral longitudinal section of our improved boiler. Fig. 2 is a front elevation of the same, and Fig. 3 a rear elevation with the end plate removed. Fig. 4 is a plan view of a portion of the boiler, showing the manner of making connection between heater E and boiler at the top.

Similar letters of reference indicate corresponding parts in all the figures where they occur.

A is the-body of the boiler,which is divided into the fire-box B and water-chamberC by the interior cylinder,D. The water-chamber O is bounded at a distance from each end of the boiler body by disks or plates OG*,which serve at the same time as supports for the fire-cylinder D. This arrangementleaves a fire-space, b, at the rear end, into which the fire-box B opens, and a similar space, b, around the firebox at the front end. These spaces 6 b are connected by return-fines F, as shown. A grate-surface, 13*, is provided in box B, having suitable supports, as shown.

In space b, secured to the walls of the boilerbody and so placed as to lie partially over the open end of the fire-box, is the curved or inclined heater or water-back E. This heater is formed of two sheets of boiler-iron, held to: gether and supported by the stay-pins e e, as shown. The top of the heater is secured to the top of the firebox and the sides to the walls of the boiler-body by means of flanged edges, with which it is provided, and bolts or rivets.

Situated over the upper portion of the mouth of the fire-box, and extending well down it,

' and approaching close to the rear end or head of the boiler, the heater, as will be readily appreciated, is in the best possible position to receive the full benefit of the heat and flame from the fire-box, as the same will flow outand strike the heater with full force, and then be compelled to flow down it and around its end or lower side, and thence the natural upward tendency of the heat and flame will carry it upward over the outside of the heater, and the return-fines 12* will induce another turn and draw the said heat and flame downward to be carried off after having imparted to the water in the heater an intense degree of heat.

Circulation for the heater is made in the most careful and efficient manner. It receives the water through pipe f from the lower portion of the boiler, thus taking the colder strata of the boiler water. This it receives, as shown, into the lower part of it, and where it will become at once hot, and rise in the heater. After receiving the proper degree of heat the water flows out through pipe f into the boiler. The water-supply for the boiler is throughthe heater by way of pipe G. This pipe f, as shown in Fig. 4., leads from the part E out through the shell and back into the boiler. The water thus taken into the boiler is first heatedto boiling-point in the heater, and when 2. In a steam-boiler, the combination, with 20 introduced in the boiler, instead of reducing the water-containing portion of the boiler, a the temperature of the contents thereof, as is fire-box surrounded by said water-containing usually done, our supply-water tends to inportion, and a space, as b, at the end of the 5 crease the same. fire-box, divided from the water-containing Having thus described our invention, what portion,ofa water-heatingdevice placedinsaid 25 we desire to claim, and secure by Letters Patspace b, and extending from the top of the fireent, isbox downward in a curved or sloping position, 1. In a steam-boiler, the combination, with and almost touching the rear wall of said [O the fire-box having the water-jacket snrroundspace, and having connections f f to the waing it, of a water-heater chamber consisting of ter-containing portion, and a water-supply, as 30 a receptacle, substantiallyas described, placed G, substantially as set forth.

directly over the end of the fire-box inaslop- In testimony whereof we afiix our signatures 7 ing position, and havinga connecting-pipe, as in presence of two witnesses.

15 f, extending from said heating-chamber to the JOHN M. DUNN.

boiler or water-jacket beneath the fire-box, WILLIAM E. SIDWELL. anda connection, as f, near the top of said Witnesses: chamber, extending into the water-jacket at T. H. KELLOGG, that point, as set forth. G. W. CORWIN.