US687062A - Heating-furnace. - Google Patents

Description

`P'atented Nov. I9, |90I.

T. H. PREST. HEATING FURNCE.

(Application filed Apr. 9, 1897.)

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Patented Nov. I9, |901.

T. H. PnEsT.

HEATING FUBNACE. (Application. died Apr. 9, 1897.)

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UNITED STATES PATENT' OFFICE.

THOMAS H. PREST, OF KANSAS CITY, MISSOURI, ASSIGNOR TO THE PREST HEATING COMPANY, OF KANSAS CITY, MISSOURI, A CORPORATION OF MISSOURI.

HEATING- SPECIFICATION forming part of Letters Patent No. 687,062, dated November 19, 1901.

Application filed April 9,1897. Serial No. 631.472. (No model.)

To @ZZ whoml it may concern-.-

Be it known that I, THOMAS H. PREST, a citizen of the United States, residing in Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Heating-Furnaces,

of which the followingis a specification, refand at the same time affording au economical and eiiicient heating apparatus.

My invention has for its object also the providing of an apparatus that may be readily adapted to varying conditions that may occur in setting up the furnace.

My invention has for its object still further the providing of an apparatus-in which a series of radially-disposed `radiating-pipes of equal length and capacity are connected at one end with the com bustion-chamber land at their other ends are connected with a common discharge-chamber, which in turn has connected to it the main smoke-pipe.

My invention also provides a no vel construction by means of which the main smokepipe may be connected with the dischargechamber in various positions.

In my invention are also included certain novel and useful features of construction hereinafter fully described and claimed.

In the accompanying drawings,which illustrate my invention, Figure l represents a vertical sectional view of a furnace coustructed in accordancb with the principles of my invention. Fig. 2 represents a transverse horizontal sectional view taken on a the dotted line Il II of Fig. l and looking in the direction indicated by the arrows which are adjacent to the characters which indicate the said dotted line.. Fig. 3 represents a perspective view of the common receiving-chamber having the cap secured to the lower end thereof and the smoke-pipe elbow above the chamber, but disconnected therefrom. In

dinary form and constructed preferably of sheet metal; 2, the canopy or covering for the casing and from which extend the hot-air pipes 3. Y

4 indicates the front of the furnace, which may be of any suitable material or shape. Cast or wrought iron is generally preferred `for the material from which to construct the front of the furnace.

5 designates the ashpit,'p'referably of castiron, closed upon all sides and provided in its front with a rectangular door-opening and in its top plate with a circular opening, by means of which connection is established between the fire-pot and the ash-pit. The bottom plate 6 of the ash-pit has its under side flush with the lower edge of the front of the furnace and also lying in the same horizontal plane as the lower side of the base-ring 7. The ash-pit bottom near its forward end inclines upwardly toward the bottom yside of the door-opening, so as to permit the easy extraction of the ashes. The rear end o f the ash-pit is preferably semicircular in form and has secured to it at its lower end a flange 8, which extends from one side of the furnacefront around the ash-pit to the other side thereof. The flange 8 inclines upwardly from the ash-pit and then outwardly horizontally 9o and has secured to it the inner ends of sev- `eral arms 9, which extend inwardly from the upper end ofthe base-ring 7. Resting upon the top plate of the ash-pit is the annular l fire-pot 10, the opening through which is in line with the opening in the top of the ash-pit. Resting upon the upper edge of the' fire-pot l() is a hollow annular cast ring 1l, the lower side of which is provided with a vertical annular ange l2, adapted to engage with a groove in the upper edge of the fire-pot to prevent lateral shifting of the ring. The upper side of the ring l1 is provided with an annular groove adapted to receive a vertical IOO annular flange 13 around the periphery ot au opening in the bottom of the combustionchamber 14.

The general form of the combustion-chamber is that of an upright hollow cylinder provided at its front side with a rectangular feedneck 15, which extends through a rectangular, opening in the furnace-front 4. Around the feed-neck 15 at its forward end is an external iiange 16, to which is secured the feeddoor frame, comprising a vertical flat plate 17, having an opening therethrough corresponding in size and position to the opening in the feed-neck. Hinged tothe plate 17 upon one side is the feed-door 13, adapted when closed to close the opening in the feed-neck.

Located upon the top of the combustionchamber at equal distances apart are a series of upwardly-extending inwardly-inclined radiator-pipes 19 radially disposed, the lower end of each of which pipes is located between two concentric vertical flanges 2O and 21, respectively, upon the upper side of the combustion-chamber and encircling an opening 22 therethrough. The upper inner end of each of the pipes 19 is connected with a vertical hollow drum or receiving-chamber 23, into which pass the products ot' combustion from each of the radiator-pipes 19. The common discharge or smoke pipe 24 is horizontally disposed and extends through an opening in the casing l. The inner end of the smoke-pipe 24 is curved, so as to form a rightangled elbow, the inner end of which is provided with a horizontal external ange 25 and a vertical groove 2G, adapted to it over either the upper or lower end of the receiving-chamber 23, which is provided at its upper end with a vertical internal flange 27, which is concentric with the body of the combustion-chamber and forms a groove therewith for the reception of the inner one of two concentric flanges 28 and 29, respectively, located upon the under side of a horizontal cap-plate 30, adapted to close the upper end of the receiving-chamber. The cap-plate 30 is provided with a series of vertical openings, through which extend the vertical bolts 31, which have their lower ends secured in vertical openings in the flange 25 of the smokepipe. The construction of the parts is such that the smoke-pipe may be located in the position shown in solid lines in Fig. 1, with the inner end secured to the lower end of the receiving-chamber and the cap 30 secured to the upper end thereof, or, if desired, their respective positions may be reversed, as indicated by the dotted lines in the same figure.

Encircling the smoke-pipe 24 outside the casing is a collar 32, secured by means of bolts 33, which pass through openings in the casing to a collar 34, which encircles the smoke-pipe 24 inside the casing. The openings in the casing which admit the bolts 33 are vertically elongated, so as to permit vertical movement of the collars. The opening provided in the casing for the admission of the smoke-pipe is large enough to permit of vertical movement of the smoke-pipe 24. In furnaces as ordinarily constructed the vertical lifting of the smoke-pipe 24, caused by the warping ofthe castings of the tire-pot or of the combustion-chamber, either raises the casing from its bearings in the base ring` or plate, or if the casing is secured rigidly to the base-plate the opening through which the smoke-pipe passes will be enlarged, permitting hot air to pass from the interior of the casing into the room occupied by the furnace. To avoid either of these two objections, I have provided the smoke-pipe with a vertically-movable bearing in the casing, as described.

Extending vertically through the combustion-chamber are a series of hot-air ilues 35, which are disposed around in a circle concentric with but of larger diameter than the ring 11. The function of these hot-air fines is to heat the air passing upward therethrough. Each of the said ilues is fitted at its upper and lower ends in vertical openings provided in the top and bottom plates, respectively, of the combustion-chamber. The lower end of each of the said tlues 35 is provided with an annular fiange 36, disposed in an oblique plane parallel to the bottom plate of the combustion-chamber upon which it rests. The upper end of each of the said hot-air flues is provided with an external horizontal annular ange 37, the upper side of whichis provided with two seats which rest in corresponding recesses annular in shape and concentric with the opening in the top Aplate oi' the combustion-chamber,throngh which the flue extends, and located in the under side of the said top plate. Around cach {ine-opening in the said top plate of the combustion-chamber upon the upper side thereoi` is a vertical annular flange 38. A space is provided between the said flange 3S and the portion of the flue 35 which is above the top of the combustionchamber, in which stove putty is placed for the purpose of sealing the joint against the escape of smoke or gas therethrough.

In setting up the furnace the smoke-pipe 24 may be secured upon the end of the chambei` 23 in any of the positions between the radiator-pipes, as shown in dotted lines between the radiator-pipes 19 in Fig. 2, after which the bolts 31 are inserted through the openings provided therefor in the cap-plate 30 and the flange 25 of the smoke-pipe and secured therein. The opening in the casing for the admission of the smoke-pipe therethrough should be made in the proper loca-- tion in the casing suiting the chosen position for the smoke-pipe. B y this construction one is enabled to pipe directly to the flue in the building from the smoke-pipe. If the draft of the chimney with which the smoke-pipe is to be connected is not strong, then the positions of the smoke-pipe and the cap 30 may be reversed from that shown in solid lines in Fig. 1 to the position indicated by dotted lines IOO IIO

in the same figure, as hereinbefore described. Where the draft is good, it is preferable to use the smoke-pipe in the lower position, as more economy in the use of fuel is thus attained, as well as increased heating capacity. Vith the radiator-pipes 19 of equal capacity and symmetrically arranged upon the combustion chamber at equal distances apart and connected to a common receiving-chamber centrally located, as shown, the products of combustion are equally divided between the several radiator-pipes, and each pipe thus has `a heating eect upon vthe incoming air to be heated equal to any of the other radiator-pipes, making a very eflicient heating apparatus, at the same time distributing the heat equally throughout the furnace and preventing undue destruction by heat of any one part of the fire-pot or combustion-chamber.

My invention is subjective to many modifications without departing from its spirit.

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

l. In a heating-furnace, the combination with a combustion-chamber, of a cylindrical receiving-chamber, a plurality of radiatorpipes connecting the combustion chamber with the receiving-chamber, a cap adapted to be secured to either end of the receivingchamber, a smoke-pipe adapted to be secured to either end of the receiving-chamber, and means for securing the said cap and the said smoke-pipe to the receiving-chamber, substantially as described.

2. In a heating-furnace, the combination with a combustion-chamber, of a tubular receiving-chamber, radiator-pipes connecting the combustion and the receiving chambers, a cap for covering either end of the receivingchamber, a smoke-pipe covering the opposite end of the said chamber, and one or more bolts connecting the cap and the smoke-pipe, substantially as described.

3. In a heating-furnace, the combination with a combustion-chamber, of a tubular receiving-chamber, radiator pipes connecting the said two chambers, a cap provided with a groove adapted to receive one end of the re,- ceiving-chamber, a smoke-pipe provided with a groove adapted to receive the other end of the receiving-chamber, and means for securing the said smoke-pipe and the cap interchangeably at either end the receiving-chamber, substantially as described.

4. In a heating-furnace, the combination with a tubular combustion-chamber provided in one end with a series of openings disposed equidistant from each other and equidistant from the axial center of the combustion-chamber, of a tubular receiving-chamber having the same axial cen ter as the combustion-chamber, and provided in its periphery with a series of openings corresponding in number to the openings in the end of the combustionchamber, radiator-pipes connecting the said openings in the two chambers, a cap adapted to be secured at either end of the receivingchamber and a smoke-pipe adapted to be connected with the other end of the receivingchamber,V substantially as described.

5. In a heating-furnace, the combination with the vertical tubular receiving-chamber provided with peripheral openings therethrough and provided with means for closing either end, of the horizontal smoke-pipe having its curved inner end adapted to be secured to either end of the receiving-chamber, substantially as described.

6. In a heating-furnace, the combination with the tubular receiving-chamber provided with peripheral inlet openings, of a cap adapted to be secured to and close either end of the said receiving-chamber, a smoke-pipe secured to the open end of the receiving-chamber, substantially as described.

7. In a heating-furnace, the combination with the tubular receiving-chamber provided with peripheral inlet-openings, ofl a cap provided with a groove adapted to receive either end of the said tubular chamber, a smokepipe provided with a groove adapted to receive either end of the said tubular chamber, and means for 4securing the cap and pipe to the said chamber, substantially as described.

8. In a heating-furnace, the combination with a combustion-chamber, of a receivingchamber, a smoke-pipe, means by which the smoke-pipe may be connected to the upper or lower end of the receiving-chamber, means for closing the opposite end thereof, and a radiator-pipe connecting the combustion-chamber with the receiving-chamber, substantially as described.

9. In a heating-furnace, the combination with a combustion-chamber, of a receivingchamber provided with two discharge-openings, a smoke-pipe, means by which the smokepipe may be connected to either of the two of said openings, means for closing the other of said openings, and radiator-pipes connecting the receiving-chamber with the combustion-chamber, substantially as described.

10. In a heating-furnace, the combination with a combustion-chamber, of a receivingchamber, a discharge-pipe, means by which the said discharge-pipe may be connected to the upper or the lower end of the receivingchamber, means for closing the opposite end thereof, and a series of radially-disposed radiator-pipes located at equal distances apart and of equal lengths and connected at their lower ends to the combustion-chamber and inclining upwardly and inwardly therefrom to the receiving-chamber to the vertical sides of which the radiator-pipes are connected, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS H. PREST.

Witnesses:

E. E. CHANDLER, WARREN D. HOUSE.

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