US 1280235 A
Description (OCR text may contain errors)
APPLlcAHoN FILED FEB. 25. 1916.
19209235 Patented Oct. 1, 1918.
2 SHEETS-snp 1.
ms Naw/us .frsns ca., rwamurno.. wAsHmcmN, n. c.
STOVE'l vnPrLlcATloN FILED FEB. 25. 191e.
Patented Oct. 1, 1918*. 2 SHEETS-SHEE 2.
' Snom/pto@ Ifewm 0de] HENRY Knitivionn, or roLsoN, MONTANA.
Speccaton of Letters Patent.
Patented oct. i, raie.
Application led February 25, 1916. Serial No. 80,509.
To all whom t may concern:
Be it known that I, HENRY KERMODE, a citizen of the United States, residing at Polson, in the county of Flathead and State of Montana, have invented new and useful Improvements in Stoves, of which the follow ing is a specification.
This invention comprehends the provision of a stove embodying in its construction, a valve controlled preheater for heating the cold air to a high degree prior toits introduction into the combustion chamber, thus producing a stove which will radiate a maximum degree of heat with the consumption of a minimum amount of fuel.
In carrying out my invention, I arrange the preheater within the stove to divide the combustion chamber into separate communicating compartments, one defining a combustion chamber and the other a hot air chamber, the preheater being so disposed to heat the cold air prior to its introduction into the combustion chamber, from whence it passes, after being reheated, into the hot air chamber free from ash dust,.dirt or the like.
The nature and advantages of the inven- I tion will be better understood from the fol lowing detail description, when read in connection with the accompanying drawings, the invention residing `in the construction, combination and arrangement' of' parts as claimed. A
In the drawings forming part of this speciiication like numerals of reference indicate similar Iparts in the several views and wherein Figure l is a vertical sectional view through a stove constructed in accordance with my invention.
Fig; 2 is a transverse sectional view taken on line 2 2 of Fig. 1.
Fig. 3 is a horizontal sectional view taken on line 8 3 of Fig. 1.
Fig. 4; is a similar view taken on line 4-1 of Fig. 1v looking in the direction ofthe arrow.
Fig. 5 is an enlarged detail view of one of the grate bars. y
Fig. 6 is a sectional view taken on line 6;(5 of Fig. 1.
Before entering into a detail description of what is herein shown'and described, I desire to have it understood that the same is merely illustrative of one embodiment of the invention to which I do not limit myself, and that various changes in the connar 'f construction O'enerall constitute the combustion chamber. However, with my invention the inclosure is divided through the medium of a preheater indicated generally at B, into separate communicating compartments 9 and 10 respectively, the former constitutingpthe combustion chamlber, while the latter provides a hot air chamber.
The preheater preferably consists of a vertically disposed rectangular casing supported upon the bottom 5 of the stove and terminating an appreciable distance from the top 6 thereof. Projecting from one `of the end walls of the casing and communicating -therewith is a relatively short pipe 11 which has associated therewith a suitable valve or damper 12 to control the admittance of cold air into the heater.- Mounted within the heater is a plurality of spaced horizontallyv disposed baffle plates l2', the latter being alternately spaced at one end from the adjacent end wall of the heater, whereby the cold air is forced to travel in a zigzag passage through the heater' before it is permitted to escape therefrom through the openings 13 in the front wall of the casing. Any number of these openings may be ro vided and are preferably screw threade to removably receive the grate bars 14, the latter having one end threaded as at 15 for operative association with the openings 13, while the opposite ends of the bars are supported as at 16. The grate bars are hollow to receive the air from the preheater B, while each ofthe grate bars is provided on its underside with a longitudinally disposed slot 17, which establishes communication between the combustion chamber 9 and the preheater B. Obviously `the cold air admitted into the preheater B through the pipe 1l is heated to a very high degree during its travel -through the preheater into the grate bars 14, which is prior to its introduction into the combustion chamber 9. In this chamber' the air is reheated to a maximum degree as its passes through the fuel, whereby the hot air rises in the chamber passing over the preheater into the hot air chamber 10, free from ash dust, dirt or other' foreign mattei'.
Positioned within the hot air chamber 10 is a spaced wall structure 18 of suitable heat retaining material, which structure as shown in this particular instance comprises a plurality of bricks arranged in the manner shown. The hot air gases and other products of combustion entering into the hot air chamber circulate through the space between the walls of the structure 18 heating the bricks to a very high degree, so that an appreciable amount of heat will be radiated from the hot air chamber for an indefinite period of time after the ire in the stove burns low or becomes entirely extinguished. Arranged within the hot air chamber immediately behind the structure 18 is a conduit 19, the latter being spaced from the bottom 5 of the stove and projecting a slight distance above the top 6 through an opening 20 therein. The upper end of the conduit is connected with the stove pipe 21 through the medium of a substantially egg-shaped drum 22, the latter being open at its /opposite ends thereby establishing communication between the hot air chamber 10 and the stove pipe 21. The stove pipe of course is provided with a suitable damper 23 which regulates the draft in the combustion chamber.
The drum 22 is preferably made in two sections which are connected in any suitable manner, and lined with non-inhammable material 24, such as burnt clay or the like. It will be manifest that as the gases and other products of combustion pass from the hot air chamber 10 into the conduit 19, they enter into the drum 22, and by reason of the restricted opening at the upper end of the drum which leads into the stove pipe 21, the lgases and other products of combustion are greatly retarded in their escape from the drum into the stove pipe. The drum is provided with a plurality of openings 25 communicating with the atmosphere, and which openings are controlled by a suitable valve or damper 26 which permits of the admittance of a requisite amount of oxygen into the drum to mix with the gases and 'other products of combustion therein to promote a second combustion of the same. With this second combustion of the gases, the smoke, as well as the soot that generally lodges in the stove pipe is consumed, and the drum in effect provides a very good radiator, which in connection with the hot air chamber l0 and the structure 18 `radiates a sufficient quantity of heat to maintain the room at a proper temperature, for an indefinite period of time after the fire in the stove has become extinguished. By reason of this construction the damper 23 may be closed to permit the fire in the stove to burn down low, as the stove under such conditions will radiate a maximum degree of heat with the consumption of a minimum amount of fuel. It will also be noted that when the openings in the drum are permitted to communicate with the outside atmosphere, the damper 23 may be left open, as the openings serve as a check draft for the stove which in eect provides a saving of fuel as will be readily understood.`
While it is believed that the nature and advantages of the invention will be readily apparent from the foregoin description I desire to have it understooc that the size and the kconfiguration of the various parts may be changed at will, without departing from the spirit of the invention.
What is claimed is :-V
1. A stove comprising a casing, a preheater including a rectangular shell extending entirely across the interior of the said casingand dividing said casing into a combustion chamber and a hot air chamber, said pre-heater shell terminating short of the top of said casing vto provide means of communication between said chambers, valve controlled atmospheric air inlet at the upper portion of said pre-heater shell, a plurality of hollow` grate barsin said combustion chamber communicating with the lower portion of said pre-heater shell and providedV on their under sides with slots establishing communications with the interior of said combustion chamber, and an outlet pipe in said hot air chamber.
2. A stove comprising a casing, .a preheater including rectangular shell extending entirely across the interior of said casing and dividingsaid casing into a combustion chamber and a hot air chamber, said pre-heater shell termin ating short of the top of said casing to provide means of communication between said chambers, a valve controlled` atmospheric air inlet at the upper portion of said pre-heater shell, a plurality of hollow cylindrical grate bars in said combustion chamber having their .ends threaded into the shell of said pre-heater, said grate bars being slotted on their under sides to4 establish communication between said preheater shell and the interior o'f said combustion chamber, and an outlet pipe in said hot air chamber.
In testimony whereof I affix my signature in presence of two witnesses.
y HENRY KERMODE.
H. S. Hanson, B. REYNOLDS.r
Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, I5. C.