US828874A - Heater. - Google Patents

Description

No. 828,874. PATENTED AUG. 21, 1906.

- R. H. BRADLEY.

HEATER.

APPLICATION FILED JAN. 14, 1908.

2 SHEETS-SHEET 1.

WITNESSES: IN VEN TOR mm M BY I 04 T ORNEYS.

N0. 828,1874.- 'PATENTED AUG. 21, 1906. R. H. BRADLEY.

HEATER.

APPLICATION FILED JAN.14, 1903.

2 SHEETS-SHEET 2.

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5 BY J i (ATTORNEYS.

THE NORRIS FEYERS 5a., WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

ROYAL H. BRADLEY, OF SYRACUSE, NEW YORK, ASSIGNOR TO KELSEY HEATING COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

HEATER.-

Specification of Letters Patent.

Patented Aug. 21, 1906.

To all whom it may concern.-

Be it known that I, ROYAL H. BRADLEY, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Heaters, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to improvements in heaters in which the air is first introduced in a cold state into a subchamber surrounding the fire-box and then passes unimpeded directly through vertical flues which form the walls of the combustion-chamber and in S which-the air is subjected to a maximum safe heat.

The object, therefore, is to subject the air to a greater or less degree of heat immediately upon its introduction, so as not to chill the fire-box and to permit it to gravitate upwardly naturally and without material re' tardation through the vertical flues in which the heat is gradually intensified from bottom to top and is maintained at a high degree in the distributing-chamber.

Another object is to provide a direct and indirect draft-controller which is located so that the products of combustion always pass upwardly to the smoke-flue.

Other objects will appear in the description, all tending toward the one general purpose of increasing the efficiency of the heater.

Referring to the drawings, Figure 1 is a vertical transverse sectional view taken on line 1, Fig. 2, through the center of my improved heater from front to rear. Figs. 2 and 3 are respectively horizontal and vertical sections taken on lines 2 2 and 3 3, Fig. 1.

Similar reference characters indicate corresponding parts in all the views.

In carrying out the objects of this invention I provide an outer shell or jacket 1, within which is located an ash-box 2, a fire-box 3, and a superimposed heating-drum 4, the latter inclosing a series of vertical air-fines 5. The lower portion of the interior of the outer shell or casing 1 beneath the lower wall of the shell 4 constitutes what may be termed a cold-air or sub chamber 6, having a cold air inlet 7 and surrounding the fire-box 3 and also a greater portion of the ash-boX 2. The upper portion of the interior of the shell or casing 1 above the upper wall of the shell 4 forms what may be termed a distributingchamber 8, which is provided with a series of outlet-openings 9 and communicates with the subchamber 6 through the flues 5 and upright passages 10 between the upright walls of the outer and inner shells 1 and 4. This outer shell 1, together with the ash-box 2, is mounted upon a suitable supporting-base 11, the front end of the ash-box being provided with a draft or cleanout opening having a closure 12, while the top of said ash-box is formed with a circular grate-opening 13, surrounded by an annular flange 14.

The firebox 3 consists of lower and upper annular rings or sections 15 and 16, both of which are corrugated transversely for forming upright air-channels between the ribs of the corrugations, the lower section being seated upon the annular flange 14 in alinement with the opening 13, while the other section 16 is seated. upon the upper end of the section 15 and together form a continuous fire-box from bottom to top, which is preferably tapering downwardly from its upper end, the air-channels between the ribs of the corrugations permitting the passage of air for .the purpose of stimulating the draft and therefore increases the heat-radiating efficiency of the fire-boX.

The heating-drum or inner shell 4 is mounted upon and surrounds the upper end of the fire-box to receive the products of combustion and consists,- essentially, of lower and upper decks 17 and '18 and a cylindrical shell 19, the lower deck 17 being mounted directly upon the upper end of the fire-box and preferably upon brackets 20 projecting therefrom, and the lower end of the durm 19 is seated upon the outer edges of the deck 17, while the upper deck 18 is formed of substantially the same diameter and parallel with the lower deck and is seated upon the upper end of the drum 19. These lower and upper decks 17 and 18 are circular in form and are provided with vertically-alined openings 21 and 22, located side by side con-- centric with the fire -boX and communicate with the interiors of the upright air-flues 5, which are impinged between the lower and upper decks within the drum 19. These upright air-flues 5 consist of separate hollow castings, each of which is open at both ends and connects the alined openings 21 and 22 for forming a series of separate vertical airpassages from the subchamber 6 to the disgreater heating-surface, but also to materitributing-chamber 8, as best seen in Fig. 3. X The lower deck 17 practically surrounds the upper end of the fire-box and extends laterally therefrom,'so as to overhan the subchamber 6,and the openings 21 t erefor lie directly over said subchamber. The lower ends of the upright air-fines 5 inclose these openings 21, while the upper ends of the Hues inclose the corresponding openings 22 in the upper deck 18, the joints between the upright flues 5 and lower and upper decks being tightly sealed to prevent any escape of the gases or products of combustion from the interior of the shell 4. The openings 22 in the upper deck 18 are somewhat lon er radially than the similar openings in the ower deck, and therefore the upper ends of the lines 5 are correspondingly elongated, the outer upright walls of the air-tubes being disposed in substantially vertical planes, and the inner walls are inclined upwardly and inwardly from bottom to top, which causes said upper ends of the inner walls to overhang the interior of the fire-box, and owing to the fact that these several upright flues are located side by side andconcentrically with the fire-box an upwardly-tapering combustion-chamber is formed by the inner walls of the fines, which operates to localize and concentrate the heat against the lines, thereby gradually increasing the intensity of the heat within the flues from the bottom upwardly. The distinct feature of this partof my invention just described consists in the sectional fire-box and the drum 4, mounted upon the upper end of the upper section of the fire-box and communicating therewith, together with the upright fines arranged concentrically around the firebox and connecting .the subchamber 6 with the distributing-chamber 8.

In order to increase the area of the surface exposed to the heat from the fire box, the inner walls of the flue-sections 5 are corrugated vertically from the bottom upwardly, thus forming upright ribs and air-channels, the object of this being not only to afford a ally strengthen the flues where they are subjected to the greatest heat.

Although the upright flue-sections are located side by side concentric with the firebox, their adjacent side walls are separated from each other for forming outlet-passages for the products of combustion, and their outer walls are separated from the drum 19 25, whereby the products of combustion are permitted to circulate entirely around each of the flues.

The front walls of the outer and inner shells 1 and 4 are provided with alined openings extending from a horizontal plane in substantial alinement with the upper, face of the lower deck to a similar plane just be- -tion of the space neath the upper deck 18, in which openings is inserted a hollow fuel-receiving frame 26,

having a fuel-opening of substantially the capacity of the former opening, the framej opening being provided with closures 27 The object of forming this vertical elongated opening in the front wall of the furnace is to permit the use of either wood or coal as fuel, the lower door being used separately for coal, orboth doors may be opened when it is desired to insert logs or large blocks of wood.

" The frame 26 is of substantially the same "size as and takes the place of two uprightfl' flue-section's, except that its inner endis open and commuincates with the combustion chamber, its upper and lower walls being continuous from the exterior of the shell to the combustion-chamber, so as to form fuel-conduit and prevent the escape ofgas, or. smoke into the air-chambers arid conduits.

A smoke-box 28 is supported in the upper rear portion .of the chamber 25 between the lower deck 17 and upper deck 18 and is, 'pro- Vided with a single smoke-outlet flue 2,9,, which protrudes through the rearwalls of the shells 1 and 4. The bottom of the smoke box is some distance above the lower deck 17, thus leaving an open space to which access may be had through a clean-out opening 30 for permitting the removal of soot which may accumulate upon and around the fines and upon the lower, deck. The upper per; formed by the omissionof two of the lines at the rear of the combustionchamber is bridged by an upright wall 31, which forms a part of the smoke-box, and the bottom of this smoke-box is forme'd wrth direct-draft opening 32, in which is moyable a damper 33. This damper is, disposed in substantially the same horizontal plane as and when closed forms a continuation of the baffle-plate sections 34, which extend in opposite directions equal distances from the op; posite sides of the smoke b ox across, the chamber 25 and around the rear, and side upright air-fines 5 for a purpose presently de; scribed. The damper 3 3 is provided at ends with suitable trunnions, which'are jour; naled in the sides of the smoke-box near the bottom, and on the front edge of the da per near one end is an upwardly-projecting. arm 35, to which is connected a pull-rod 36, hav:

ing its, outer end extending through suitable tinuous upflow of the-products of combustion from the fire-pot to the final exit when the damper is set for either a direct or indirect draft. Another advantage of the single smoke-exit fiue is that a minimum amount of pipe is exposed to corrosion, and therefore the expense of repairs, which are frequently required on this part of the furnace, is materially reduced, and I am also enabled to set up the furnace in cramped places, where it would be impossible to use two external smoke-pipes for the direct and indirect drafts. A still further advantage is that almost all of the castings are concealed Within the outer shell 1 and that only one smokepipe is visible.

When an indirect draft is required, the damper 33 is closed or moved to a horizontal position, as seen in Figs. 1 and 2. Then the products of combustion will pass upwardly and laterally between the airflues and around the ends of the bafiEle-plate sections 34 and continue upwardly and laterally through the openings 37 in the sides of the smoke-box and thence through the exit 29. If a direct draft is required, the damper 33 is opened or tilted from a horizontal position, so that the products of combustion will pass upwardly from the combustion-chamber directly through the opening 32 into the smokebox and thence into the smoke-exit 29, the flow of the products of combustion in either case being always upward, and therefore the indirect draft is more effective under. all conditions than would be the case if the prod ucts of combustion had to pass downward before reaching the final discharge.

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

1. In a heater the combination with a firepot, a superimposed shell having a lower deck surrounding the upper end of the firepot and provided with air-passages, upright fiues rising from the lower deck and alined with the passages, an upper deck provided with air-passages alined with said flues, a smoke-box disposed adjacent a space between two of said fiues and extending from near the said upper deck to near the said lower deck, said smoke-box having a top, an

upright rear wall, and upright side walls, saidsmoke-box having openings in its side walls, a damper arranged in the smoke-box below said openings in the side walls and a baffle-plate extending from the side walls of the smoke-box partly around said flues.

2. In a heater, the combination with a firepot, a superimposed shell having a lower deck surrounding the upper end of the firepot and provided with air-passages, upright flues rising from the deck and alined with the passages, a fuel-inlet conduit leading to the edge of the fire-pot, a smoke-outlet conduit leading from the interior of the shell, a smoke box comprising a top, an. upright rear wall and upright side walls, said smoke-box being arranged between said flues and the wall of said shell and connected to the smoke-outlet conduit, the upright rear wall of the smoke box extending across a space between two of said flues, said smoke-box having openings in its side walls, a baffle-plate extending from the smoke-box partly around the lines, a damper in the smoke-box above the lower end of the smoke-box and substantially in the same plane as said baffle-plate; the smokebox, the damper and the baffle-plate constituting with the smoke-outlet, direct and indirect passages for the products of combustion.

3. A heater comprising a fire-box and a superimposed heating-shell composed of lower and upper decks, an upright drum between said decks, and air-flues extending from the lower deck to the upper deck, said air-flues being spaced at regular distances apart for a portion of the circumference of the fire-pot and with a wider space at one point, a smokebox arranged adjacent said wider space, said smoke-box being formed with an upright rear wall facing said space, a damper arranged within said smoke-box and a baflie-plate extending from the sides of the smoke-box around the said flues, substantially as described.

In witness whereof I have hereunto set my hand this 7th day of January, 1903.

ROYAL H. BRADLEY. Witnesses:

H. E. CHASE, HOWARD P. DENISON.

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