US1486429A - Hot-air furnace - Google Patents

Description

J. A. HAGSTROM HOT AIR FURNACE Filed Aug. 9, 1923 March M, 1924.

John Hucgsbrom INVENTOR 25 per chamber having a secondary chamber arber 11 which fits directly over the lower 80 a a Fatented Mar. 11, 192 L d fi afi JOHN A. HAGSTROM, OF Yfill'hl'GSTOWN,v OHIO.

HOT-AIR FURNACE.

Application filed. August 9, 1923. Serial No. 656,472.

To all whom it may concern: Figure 8 is a top plan view of a second Be it known that J OHN A. HAGs'rRoM, a section resting upon the lower section. citizen of the United States of America, re- Figure 4 is a top plan view of a top secsiding at Youngstown, in the county of Mation of the furnace showing the upper coverhoning and State of Ohio, has invented cering of the same removed. tain new and useful Improvements in Hot- Figure 5 is a detailed view showing curved Air Furnaces, of which the following is a and slotted partitions, shown in Figure 3. specification. By referring to Figures 1 and 2 it will be This invention relates to what is known seen that I have provided a lower section 1 10 to the trade as hot air furnaces. The princiequipped with grates 2 and 3. There is also 65 pal object of this invention is to provide a provided an ash pit 4 underneath the grates furnace reasonably simple in construction having clean out doors 5. Centrally located and particularly eflicient in producing heat within the lower section 1 and between the with a minimum amount of fuel. grates 2 and 3 there is provided a hot air Another object of this invention is to promanifold 6 provided with a plurality of vide a furnace having the fire pot divided openings 7. These openings 7 are formed by means of a preheated air manifold. in the ridge portion of the upper part 8 of A still further object is to provide means the hot air manifold 6. It will also be seen for admitting overhead air at both sides of that there is a fresh air inlet 9 connecting chambers arranged above the fuel line of with the rear end of the hot air manifold 63. said furnace. By referring to Figure 3 it will be seen Another object is to provide a secondary that I have provided a second section 10. outlet to a chimney or flue for said furnace. This section 10 is semi-elliptical in shape A still further object is to provide an upand provided with an interior circular mem ranged so as to regulate the gases produced section 1. This interior circular section 11 by the burning fuel within said furnace in is provided with curved and slotted partirelation to its final exit to an outlet leading tions 12 and 13 which are formed in two to a chimney or flue for said furnace. sections for the convenience of inserting or 0 In order that the present invention may removing the same (see Fig. 5). These be more readily comprehended, I have discurved and slotted partitions allow waste closed one embodiment of the same in the gases and smoke to pass into chambers 1 accompanying drawings, though it is to be and 15 formed at the ends of the second understood that these drawings are merely section 10. It will also be seen that these 35 illustrative and that the contemplated strucchambers 1-1 and 15 are provided with fresh ture is susceptible of a wide range of variaair inlets 16 and 17 respectively. By again tion and modification without departing referring to Figure 3 it will be seen that from the spirit of the invention or sacrific- I have provided a secondary exit 18 leading ing any of the salient features or underlying to an ordinary chimney or flue. This sec- 0 principles thereof. ondary exit is provided with a damper 19 Ordinary furnaces known to the trade carrying an operating arm 20. This damper make no special provision for consuming the 19 is normally closed but in order to utilize smoke that usually finds its way up the the same an ordinary cord or chain is at chimney. With the construction which is tached to point 21 on the operating arm 20.

5 about to be set forth. it is believed that the The other end of this cord or chain to be incompleted combustion of fuels which ordiattached to feed doors 22 and 23 so that narily go up the chimney in the form of when either or both of the feed doors 22 and combustible gases, carbon and smoke will be 23 are opened the operating arm 20 will be utilized in providing heat and thus saving drawn upwardly to a position shown in Fig- 50 fuel. are 3 thereby opening the damper 19. The

In the drawings: object of this secondary exit 18 is to provide Figure 1 is a front elevation of the furefiicient escape for smoke or gases directly nace. to the flue or chimney when the furnace Figure 2 is a top plan view of a lower secis being fired, it being understood that when 55 tion of the furnace. the feed doors 22 and 23 are closed the damper 19 automatically closes, due to the gravity pull on the operating arm 20 which is in a horizontal position when the damper 19 is open.

By referring to Figure 4 it will be seen that I have provided a top section 24 which is similar in shape to that of the second section 10.

By referring to Figures 1 and 1, it will be seen that I have provided upper outlets 23 and 26 leading into chambers 27 and 28 formed in the top section 2 1. It will be seen that I have provided a circular cap member 29 fitting securely over the interior circular member 11. The chambers 27 and 28 are separated by means of a partition 30 and a rectangular outlet chamber 31 positioned directly above the partition 30 and secured to the covering 32 of the top section By referring to Figure 4t it will be seen that this rectangular outlet chamber 31 is provided with-an exit 33 leading to an ordinary flue or chimney. A bottom portion 3 1 of the rectangular outlet chamber 31 is provided with openings 35 and36. These openings 35 and 36 being diagonally disposed into bottom portion 34: in such a manner that there is provided an opening on each side of the partition 30. It will also be seen that I haveprovideda shut-off member 37 provided with a slide 38 which closes the opening 35 when the shut-ofi member 37 has been pushed in as shown in Figure 4. It will also be seen that when the shutoff member 37 is pulled outwardly the slide 38 closes the opening 36 and opens the open ing 35.

The operation of the device is as follows:

The fire may be'startcd over either grate 2 or 3 as desired. If the lire is started over the grate 2 the shut-off member 37 should be pulled out in order to close the opening 36 and open the opening 35. The fire nowmay be started over the grate 3 when the shut-off member 37 should be pushed in closing the opening 35 and opening the opening 36. The furnace should now be fired at intervals of such time as found necessar to produce the desired heat, one grate being fired at a time and in order to secure maximum combustion of the fuel the openings 35 and 36 should be closed or opened in the manner described starting the fire. In operating the furnace in the manner above described it will be seen that if fuel'is placed upon the fire over the grate 3 the gases and smoke will be forced to take azdirection passing over-the top of the hot essence air manifold 6 where preheated air is mingled with this smoke and gas being directed over the fire on the grate 2 where a maximum amount of the unburnt qualities of the fuel will be consumed. The refuse consisting of incombustible gases etc. now passes through the curved and slotted partition 13 into the chamber 15, from which it passes into the chamber 28 and then through to opening 36 and on out to an exit 33 leading to an ordinary chimney or flue. It will be understood that by alternating the feeding over the grates 2 and 3 and manipulating the furnace as above described the passage of the combustible gases and the non-combustible gases will take alternating In a device of the class described the bottom section of a furnace carrying two sets of grates, an ash pit formed underneath said grates, a preheated hot air manifold positioned between said grates, a fresh air inlet leading into one end of said preheated hot air manifold, a ridge portion formed on the upper portion of said preheated hot air manifold, a plurality of openings distributed in the above mentioned ridge, a second section positioned above said grates and connecting parts, an interior circular member within said second section, curved. gratings secured to the sides of said interior circular section, a chamber communicating with said gratings, fresh air inlets leading into said chambers, a secondary outlet leading from the interior circular member, a damper functioning in-said secondary outlet, a top section positioned above said second section, a circular cap member fitting securely over said interior circular member, two chambers formed in a top section, a vertical partition separating said chambers, a rectangular out let chamber formed directly above said partition, two openings formed in the bottom of said rectangular outlet circular, one opening on one side of said partition and another opening diagonally disposed and positioned on the other side of said partition, a slide functioning with said opening for the purpose of regulating the direction of non-combustible gases etc. escaping to an outlet leading to an ordinarychimney,substantially as described for the purpose set forth.

In testimony whereof I affix my signature.

JOHN A. HAGSTROM. Vitnesses:

O. A. HARP AN, W. B. HARPMAN.

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