US640778A - Attachment for stoves or furnaces. - Google Patents

Description

No. 640,778. Patented 1am 9, [900.-

H. H. KORTHAUER.

TTACHMENT FOR STUVES 0R FURNACES.

(Application med' Apr. 29, 1899.)

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No. 640,778. Patented la-n. 9, 1900. H. H. KURTHAUE'R.

ATTACHMENT FDH STOVES 0R FURNAGES.

(Applicatibn led Apr. 29, 1899.)

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UNITED STATES PATENT Ortisei HERMAN H. KORTHAUER, OF BENSENVILLE, ILLINOIS;

ATTACHMENT FOR STOVES OR FURNACES.

SPECIFICATION forming part of Letters Patent No. 640,778, dated January 9, 1900; Application filed April 29, 1899. SerallNo. 715,024. (No model.)

lb all whom it may concern:

Be it known that LHERMAN H. KORTHAUER, a citizen of the United States, residing at Bensenville, in the county of Du Page and State of Illinois, have invented certain new and useful Improvements in Attachments for Stoves or Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to stoves and furnaces; and it consists in certain novel features of construction and combination of parts, the preferred embodiment or materialization of which will be hereinafter fully described, and illustrated in the accompanying drawings, made a part of this application.

The object of my invention is to more effectively utilize the heat Within a stove or furnace than is now common. This result I accom plish by practically increasing the radiating-surface presented to the action or influence of the fire, which I accomplish in a very simple, cheap, though thoroughly efficient manner. i

A further object attained by the use of my invention is the utilization or taking up of the lower and colder strata of air and passing it through or over heated surfaces, and thereby raising the temperature thereof to an agreeable point, thus insuring a complete circulation of air in a room and that the air nearest the floor will be practically of the same temperature as that nearest the ceiling.

While I have illustrated and shall describe in the following specification the preferred construction and arrangement of parts, it Will be understood that I desire to comprehend the substantial equivalent thereof, and I do not therefore wish to be coniined strictly to the exact showing I have made. Y

In the accompanying drawings, Figurerl is a vertical section of an ordinaryheating-stove provided with my air-heating attachment. Fig. 2 is a top plan view of the attachment removed. Fig. 3 is a perspective View of an ordinary cooking stove or range, showing my attachment in the position usually occupied by a water-heating boiler. Fig. t is a longitudinal section of my attachment and the top of a stove, showing the relative position of said parts to each other when in their cop# erative positions.

In' order to conveniently referto the several 5 5 parts of my invention and such cooperating features as may be necessary to illustrate the use thereof, designating-numerals will be employed, of which l indicates the body-section or nre-pot of an ordinary stove having the usual upper portion or magazine extension 2, the fuel-door 3, and the flue connection 4, all of said parts being substantially of the usual construction.

Within the magazine portion or extension 2 I mount and removably secure my improved air-heating attachment, which consists of the exterior body or cylinder 5 and the interior cylinder 6, both of said parts being preferably cylindrical, though other form of outline may be adopted, it being understood that the interior tube or cylinder 6 is of considerably less diameter than the outer casing or cylinder 5.

Fitting tightly around or permanently se'- cured to the lower end of the inner casing or tube 6, which is left permanently open at its lower end, is the collar 7, which extends out- Ward and is permanently attached to the lower edge of the outer casing 5, thereby inclosing and supporting the inner tube. Immediately above the collar 7 I secure to the inner walls of the outer casing 5 and to the outer Walls of the inner casing 6 the perforated collar or air-commingling plate 8, and connecting with the annular chamber 9 thus provided between the collar 7 and the plate 8 is the air-delivering pipe or tube 10, which extends outward through asuitable aperture provided in the wall of the stove and thence downward to a point near the floor. In Fig. l it will be seen that this pipe is shown as extending out of the body portion of the stove and thence downward at right angles, though itis thought that a preferable and more sightly construction would perhaps dispose said tube more closely against the exterior Wall of the stove.

The upper edge of the exterior casing 5 may be provided with a continuous flange or with anchoring-ears ll, by means of which the device maybe secured in position by stove-bolts 12, passing through the top of the stove and properly secured by nuts in the usual way.

IOO

The inner casing 'or tube 6 may be employed as the throat of a magazine, through which coal maybe introduced to the lire in the usual manner, in which case the lid or cap 13 should be removably secured upon the upper end of said tube and provided with a suitable handle, (not shoivm) whereby said lid or cap may he readily removed and replaced; but it is thought that better results would be reached by introducing the fuel through a suitable opening, as the door 3. i

It will be observed that since the interior casing 6 is of much less diameter than the outer easing 5 there will he an annular chamber or space 14 around said inner casing, which I utilize to locate the spirally-arranged plates 15, which are multiplied in number accordin g to the size of the iiues to be form ed. By the arrangement illustrated in Fig. 2 it will be observed that between said plates Will be formed a continuous spirally-disposed flue or opening 16, aiording a greatly-extended line of travel for the air received through the tube 10. By suspending my air-heating device Within the body of the stove immediately over or under the influence of the lire the ame and heat will not only Wrap around the exterior easing 5, but will also extend freely upward through the open end of the inner casing 6, and in order to prevent a dead-air chamber from being formed Within the inner casing I provide the laterally-extending duct 17, designed for the escape of accumulated gases, smoke, the., thereby insuring a more perfect circulation of heat and an incident increase in temperature of the air passing upward through the spiral lue 16 and thence upward through an opening provided in the usual cap or hood 18 of the stove.

By the arrangement of the parts which l have just described and illustrated the hot air Within the stove is more effectively utilized than `Would be possible without such means, inasmuch as the only radiation of heat from a stove as now constructed takesV place from the exterior surface thereof, the interior air, though of highest temperature, being l permitted to escape through the chimney Without delivering its j ust portion of caloric. The advantage resulting from forming the dues spirally Will-at once be appreciated, inasmuch as ues of great length may be disposed Within the upper portion of a stove Without the necessity of so extending or increasing the length of the exterior casing surrounding said lines as to in any Way prevent ready accessibility to the fire-pot or obstruct the action of the dame, it being obvious that the length of the iiues is determined by the degree of spirality of the plates 15.

lt is found in practice that since the exterior walls of 'the fines are heated to a high de grec the air will move rapidly upward through the same, and the draft thus induced will cause the cold air near the door to he taken up and rapidly passed through said dues, thereby utilizing to the fullest extent the incedric terior heat of the stove, which ivould other- `:vise inipotently pass into the chimney, the result being great Wastefulness of the utilization of the fuel.

lt is now common to extend the Iiue or pipe of the stove through the ceiling of the room in which the stove is located and thence up- Ward through the door of the room above, when a drum is attached to said pipe and connection made with the drum and the chimney, the result being an unsightly and cumbrons device. By the use of my air-heating appliance the cumbrcus drum and obstructing pipe may be entirely dispensed with and in lieu thereof a neattuhe, of tin or the like, may be arranged to extend upward from the opening in the hood 18 through the ceiling and into a register provided in the licor of the room above, thus insuring that said roomwill be thoroughly though economically heated.

I am aware that it is common to arrange spirally-disposed dues for the purpose of con'- ducting the smoke, heat, and other products of combustion over or in contact with the maximum amount of radiating-surface; but this plan is very objectionable and unsatisfactory, inasmuch .as soot, ashes, and the like will so greatly accumulate that the heat will have little etect upon the surface intended to be heated, but Will pass into the chimney Without much benefit to the room in which the stove is located.

While i have illustrated my air-heating appliance as used in connection with an ordinary heating-stove in which coal is employed as fuel, it will be understood that it will be desirable for use upon any variety of stove or furnace and, in fact, will be especially desirable as a furnace attachment, in which case ICO the number of devices, each having spirallydisposed lines, should be multiplied according to the size of the furnace above the fire-pot, it being clear that a half-dozen of such devices, more or less, as illustrated in Fig. 2, could be disposed adjacent to each other Within the upper portion of a furnace-body and there secured in any suitable Way, as by arms or brackets secured to the interior surface of the furnacewvall, each of the interior tubes of each device being properly ventilated with a suitable duct corresponding to the duct 17. Where a number of airheating devices are thus grouped together in a furnace-body, it will be desirable to provide a dome at the top of the furnace, which will be a common delivery-point for all of the devices grouped together below, and it is obvious that by providing said dome with a number of apertures the heat therein could be readily delivered to all of the rooms of a building, and since the air passes with considerable velocity through the spiral ilues, owing to the intense heat to which it is subjected, the air is actually forced through the delivery-pipes into another part of the building, even against the direction of the prevailing wind, which is not possible with furnaces as now constructed.

I prefer to deliver the cold air as it comes through the pipe 10 into the annular chamber 9 instead of passing it directly into the flues, since the air will be temporarily held in check within said chamber, and thereby initially heated before passing upward, thereby being evenly distributed through the apertures provided in the plate 8, thus insuring that each of the lues will receive its proper quota of air and that the cold air cannot immediately and rapidly leave the flues without being raised to the proper temperature, and, furthermore, by holding the cold air in check within the annular chamber 9 the bottom'of the device is prevented from becoming warped or rapidly burned ont and ruined.

In addition to the great advantages arising as a result in the use of my improved air-heating apparatus as applied to heating stoves and furnaces it will also be found to be very desirable and important, with slight modifications in the construction thereof, for use upon cooking-stoves, as illustrated in Figs. 3 and 4, since a cooking-stove, as a rule, is designed only with reference to its cooking capacity, and as a result the average kitchen is not well heated, especially near the floor, and it is obvious that by the use of my invention the cold air maybe drawn upward through the pipe 19, which corresponds to the pipe l0 in Fig. 2, and thence taken under a perforated diaphragm or collar corresponding to the collar S, and thence fed upward through such perforations into a series of lues 20, which are increased in number, as desired.

In adapting my air-heating device for use upon cooking-stoves I prefer to provide an exterior casing 2l of elongated or oval form corresponding somewhat in outward appearance to an ordinary washboiler, it being understood that the interior casing 22, corresponding to the interior casing or tube 6, is of corresponding shape with the said exterior casing, thereby providing a continuous annular chamber between the outer casing 2l and the inner casing 22, in whichI dispose the spirally-arranged plates or flanges 23, corresponding in function or oflice with the plates 15 in Fig. 2. To the upper edge of the casing 21, which corresponds to the exterior casing 5 in Fig. 2, I attach or integrally form therewith the housing or shell 24:, which is inclined outward atits lower end and is designed to it within the usual opening of a stove after the lids and X-pieces have been removed or may be of sufficient extent to entirely cover said opening, and thereby prevent the escape of gas or smoke. By this arrangement it will be seen that I form around the exterior casing proper, 2l, and said outer shellor housing 24 an annular chamber 25, up into which the heat and ame may extend, thereby enabling the heat to reach upon the outer sides of the iiues, while the inner sides of said lues are also affected by the flame and heat as it extends upward in the tube or casing 22, it being understood that the permanently-secured cap 26 is attached to the upper end of said inner casing.

By the construction which l have just described and which is fully-illustrated in Figs. 3 and 4 it will be appreciated that I have provided a simple attachment which may be readily applied to use upon a cooking-stove and as promptly removed therefrom when not in use, thereby insuring that the cold air nearest the floor will be taken up and heated and the temperature of the room thereby rendered more agreeable. It will be readily appreciated that various modifications may be made by means of which my air-heating device will be rendered applicable to almost any stove or arranged to fit upon almost any variety of stove, furnace, or other source of heat and that it may be made a permanent part of the stove or furnace or manufactured as a simple article complete within itself and ready to be placed over the source of heat.

My invention may be readily formed of any metal suitable for the purpose and may be built up of several separate pieces of sheet metal, or most of the parts thereof may be cast or integrally formed in one piece, thereby making it possible that the cost of manufacture may be reduced to a minimum point.

It is clear that various simple modifications of the means I have herein described and illustrated may be employed by which the heat may be conveyed to any or all of the rooms in a building from a simple heating-stove of ordinary construction-as, for instance, by providing a drum adapted to it over the top of the stove into which the heat from the flues is delivered and thence conveyed by suitable pipe connections to the points where it is desired to use the same.

By disposing my heating appliance within the body of the stove the direct effect of the heat comes in contact with the sides of the dues, thereby greatly increasing the surface of radiation, and since no soot, ashes, or other products of combustion can collect upon any of the parts of my heating appliance use does not effect the efficiency thereof.

By increasing the number and length of the flues the air is confined within a smaller space and will be heated more quickly and raised to a much higher degree of temperature than if the flues were larger, and even though the flues are of great length and of slight pitch or upward inclination the high degree of temperature to which the air is raised will insure that there will be a vigorous or rapid draft through the same and that when the air is released at the top of the stove it will be much more perfectly heated than if passed more directly through the stove, as would be the case if the iiues were of larger extent and more rapid pitch.

It is thought that the advantages enumerated and others will be fully appreciated and understood from the foregoing specification, and believing that the construction has been made entirely clear I will now set forth what IOO IIO

e' cedere I oleiln as new and desire to secure by Leiters Patent.

1. As en attachment for stoves, furnaces, or the like, air-heating fines spirali y disposed around an inner casing open et its lower end and closed at its top; an exterior casing inclosing said fines; a colla-r connecting the lower open end of the inner tube end the lower end o the exterior tube; e perforated flange or disk fitting around said inner tube and located above seid coller whereby e. cold-ain receiving` chamber will be formed below seid lines and ni eens to deliver the cold nir in said chamber, es specified and for the purpose set forth.

2. As an improvement in air-heating eppliences for furnaces, stoves, the herein-described device consisting` of en inner and outer shell or casing, the former being closed at the top and open at the bottom; e iienge extending from the open end of said inner casing to the lower end of the outer casing; e perforated partition secured to the exterior wall of the inner casing and the interior well of the outer casing and located above seid iiange; spirnlly disposed plates extending,` around the inner easing end occupying' the zinnnlar chamber between seid cesings g means to secure the outer easing in piece and a pipe extending from the chamber below seid perforated partition outside of the stove to a, point near the door whereby the cold nir will be gathered and delivered through the spiral fines provided by seid plates. in the manner speciiied end for the purpose set forth.

3. As an improvement in air-heating epi pliances for furnaces, stoves, the combination With e stove-body, of e spirally-erranged due disposed Within the body of the stove or iurnace immediat-ely above the fire-pot 5 suitable casings designed to inclose seid fines whereby the dame and heat may pass upon both sides thereof, and an air-pipe extending from c,

peint near the door upward into the stove in communication with seid fines, and e perforated disk adapted to temporarily check the cold eir before entering the dues, whereby said sir will be evenly distributed in the menner specified and for the purpose set forth.

L As e. nenT article of manufacture, the herein-described einheating device consisting of en outer and inner casing, the letter open only at the bottoni and the former open only et the top; c. perforated flange or disk separating the ann nier chamber formed between seid cesings into two compartments; e. spirellynrrenged plate or plates secured to the exterior Well of the inner casing and the interior Wall of the exterior casing, whereby an inclined flue or dues may be formed Within seid annular chamber; e duct or tube extending from the closed upper end of the inner tube outward through the spirally-disposed fines and exterior casing, and a. pipe coininnnieating with the compartment below said perforated collar and extending to a point neer the door, all combined es speciiied and for the purpose set forth.

5. An einheating appliance, consisting of a. psir of shells or cesings, one fitting Within the other and thereby forming an annular chamber closed at the bottom and open at the top; a. tightly-ntting cap 'for the upper Vend of the inner chamber; spirellydisposed anges or plates disposed in seid annular chamber; o perforated flange or plete located belor:r seid dues, whereby the cold air es received will be evenly distributed to the dues and ineens to hold seid device in an' adjusted position, es speciied end for the purpose set forth.

in testimon Whereot I affix my signature in presence of two witnesses.

HERMAN H. KORTHAUER. Witnesses:

H. W. F. BrinrnLLs, M. E. LESTER.

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