US685238A

US685238A - Heating-stove.

Info

Publication number: US685238A
Application number: US4524701A
Authority: US
Inventors: Swan Holmgren
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-01-29
Filing date: 1901-01-29
Publication date: 1901-10-22
Anticipated expiration: 1918-10-22

Description

Patented uct. 2-2, 19m.-

' S. HLMGBEN.

HEATING STDVE.

- (Appmion med Jan. 29, 1901.)

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lthe fire chamber.

UNITED rares PATENT Fries,

HEATING-STOVE.

SPECIFICATION forming part of Letters Patent No. 685,288, dated October 22, 1901.

Application filed January 29, 1901. Serial No. 45,247. (No modeLl To aZZ- whom, t may concern,.-

Be it known that I, SWAN HOLMGREN, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Heating-Stoves; and I do 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, reference being had to the accompanying drawings, and to the igures of reference marked thereon, which form a partof this specification.l

Figure 1 is a sectional side elevation. Fig. 2 is a semisectional front elevation. Fig. 3 is a cross-sectional View on the line fr of Fig. 2. Fig. 4 is a cross-sectional view on the line y 1/ of Fig. 2. l

1 is the base of the stove, from which the shell 2 rises and with the top 3 resting on the shell, as shown. The base 1 is perforated, as

shown at 4, or it will be otherwise arranged4 to permit the free circulation of air. The base and the shell may be of any size or shape and of any fanciful design, but will preferably be circular, as shown. The top 3 is formed, preferably, conical in outline and with a series of outlet-openings 15 near the base of the top and just above the upper line of the shell 2, as shown, with an annular band or ring valve 16, fitting revolubly over the perforations l5, and with correspondingperforations 17 ,adapted to register with the openings 15. By this means a means is provided whereby the perforations 15 may be-opened and closed or partially opened and closed by adjusting the ring-Valve upon its seat upon the conical top. Thus the outflow of the air may beperfectly controlled from outside the stove.

5 is the fire-chamber, which is in the form of an oblong boX open at the top and front, with the main door 6 of the stove leading into The iirechamber rests upon a diaphragm or transverse partition 7, which is supported from the base or shell, so as to leave a space betweenit and the base, which space may be lled with some heat-retaining substancev or compound, such as sand, and the spaces between the dre-chamber and shell may be likewise lled with a Similar heat-retaining material, as indicated at 8. The irechamber will preferably be su pported fromrthe shell bysuitable braces,as at 9.

Passing vertically upward through the bottorn of the base l and the diaphragm 7 at the sides of the fire-chamber are two dues 10 1l, one oneach side, and united bya horizontallydisposed transverse iiue 12 at some distance above'the iire-ehamber. The flues 10 and 11 also pass through the massof sand or other heat-retaining medium 8 at the sides of the nre-chamber, as shown, so that the air in the flues will receive the benefit of the heat radiating from the heat-retaining medium as it passes upward through the lues.

In the upper part of the outer shell l is a conical shell or drum 13, connected to the interior of the shell 1 at its upper wider part and connected to the center of the horizontal transverse flue 12 at its throat or narrowest part 14, as shown.

The air-dues 10 and ll, rising vertically through the shell at the sidesvof and outside the fire-pot, do not offer any obstruction to or project over any part of thel re-pot, leaving the whole fire-pot thus entirely unobstructed, so as not to be interfered with in any manner by thel presence of the iiues. Then, again, the ilues rising vertically through the shell permitl the air to rise freely Vand rapidly and without obstruction from any inclinations or bends and-passes rapidly into the horizontal section 12, where it is suddenly turned at right angles and subjected to the strong heatcurrents rising from the product of the c0111- bustion and from` Vthe, smoke conducting drum, ashereinafterrshown. The hot air then iiows rapidly into the lower section 13 of the .conical drum and expands into the double conicaldrurn 3 13, completely iilling the whole drum and expanding therein and escaping, as required, through the exit-ports 15. The chamber in the top 3 above the outlets 15 forms an important feature of the invention, as a limited air-pressure is thereby formed by the expansion yof the hot air to serve as a means of accelerating the outflow of the air from the ports 15 and keeping the flow constant and regular, serving to a limited extent the same purpose as an air-chamber in a forcepump. This is an important feature, and is not shown by any structure with which I am IOC) acquainted. The air by this arrangement is caused to pass rapidly throughout the whole system of flues and chambers and subjected to the infiuence of the products of the combustion in the best position to fully absorb the heat radiated therefrom. The sand or other heat-retaining filling 8, which incloses the flues 10 11, serves an important function in this connection, as it materially aids in imparting heat to the air as it passes through the lines, as well as retaining the heat and radiating it continuously into the surrounding atmosphere, thus requiring a less amount of fuel to produce the required results.

18 is a drum having closed ends and arranged horizontally across the interior of the shell at one side and above the lire-chamber and beneath the line of the transverse flue 12 and in close proximity thereto and provided with a branch due 19, leading rearward therefrom through the shell 2. Branching forward from the drum 18 are two branch flues 20 2l and opening near the front of the shell 1 the iiues 20 21, preferably inclined outward slightly, as shown, so as to extend the intake of the ilues laterally. The intake branch llues 2O 21 are smaller than the drum 18 and are arranged to open at the greatest possible distance from the drum, the latter being arranged as near as possible at one side of the shell 2 and the intake ends of the branch ilucs being at the farthest possible point on the opposite side the smoke and other products of the combustion are caused to travel entirely to one side of the shell before they can enter the intake-fines and then traverse the entire distance back again across the shell before they are permitted to escape by the way of the outlet 19. The drum 18 and fiue 19 20 21 form the means for the outlet of the smoke and other products of the combustion, and by arranging this conducting medium in the extended form shown all the smoke and flame will be first carried forward toward and in contact with the front of the shell, so as to provide for its radiation therethrough, and thence backward. through the drum and dues, whereby the air within the shell surrounding the various flues and drums is highly heated, and thereby very greatly increasing the efficiency of the heater. The closed drum 18 being closed at the ends provides an expansion-chamber, in which the products of the combustion will expand and be somewhat retarded, so as to exert a large influence upon the surrounding atmosphere and also upon the air passing through the

iiues

10, 11, and 12. By placing the drum 18 as near the transverse flue 12 as possible the full benefit of the heat radiating therefrom will be imparted to the

iiues

10, 11, and 12, so that none of it will be lost or wasted. By this arrangement a very compact and economical arrangement of dues and chambers is insured and in which the radiation from the products of the combustion is utilized withV very little waste. By this arrangement the heat from the tire in the lire-chamber 5 is utilized to the greatest possible extent.

If wood is the fuel employed, a grate will not necessarily be required in the fire-box; but if coal is employed a grate 22 will be employed which will preferably be in the form of a removable basket-like stru cturc,as shown in Figs. 1 and 2f The main door 6 may be in two parts, if required, and will be provided with the usual draft-admitting slides or wing-valves 23.

24 is a smaller door above the main door 6, through which the fuel may be fed when the grate is employed, or this door may be also employed for the same purpose when the grate is not employed, if preferred. The smaller door will preferably be provided with mica lights, (indicated at 24 25.)

The base 1 may be supported upon legs in the ordinary manner instead of by the extended base, if preferred.

Having thus described my invention, what. I claim as new is- 1. In a heating-stove, the combination of a shell or casing,a tire-potinclosed by the lower part of said shell or casing, fines opening downwardly through said shell, and rising vertically between said lire-pot and said shell, a horizontal drum disposed transversely of said shell above said fire-pot, and connected at its ends to the upper ends of said Vertical flues, a drum formed of two conical chambers united at their larger ends, and connected at the lower end centrally to said transverse drum, a series of apertures in said drum at substantially the center thereof, and means for regulating the outflow from said apertures, whereby the air-currents are caused to pass rapidly upward in said vertical flues, be subjected to the infiuence of the heat radiating from the products of the combustion in said transverse drum, and expanded and subjected to pressure in said double conical drum, substantially as set forth.

2. In a heating-stove, the combination of an inclosing shell, a fire-pot, a transverse drum above said lire-pot, vertical flues connecting said drum with the open air beneath said lire-pot, a double conical drum connected to said transverse drum, and projecting above said shell,apertures disposed centrally of said double conical drum, a closed drum transversely disposed with relation to said shell at one side and in close proximity to said firstmentioned transverse drum, an exit-flue leading from said closed drum, and contracted inlet-fines connected into said closed drum, and opening Within said shell at the most rcmote points from said closed drum, and at the opposite side of said shell therefrom, substantially as set forth.

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

SWAN HOLMGREN.

Witnesses:

ANDREW PETERSON, A. H. ARosIN.

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