US1219664A - Furnace. - Google Patents

Description

G. E. ROSE, E. P- BRADSTRUM & O U. GRANT.

FURNACE.

APPLICATION FILED MAR. 21. l9l6.

1 2; 9,66% Patented Mar. 20, 1917.

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G. E. ROSE, E. P. BRADSTRUM & 0. U. GRANT.

FURNACE.

APPLICATION FILED MAR.21, 1916.

1,219,664. Patented Mar. 20, 1917.

2 SHEETS-SHEET 2- //7 z/ex z f0 l S Fi 4 f Lose EZQGKE Brnosfrum UNIT STAT% AE UFFIQ GUSTAF E. ROSE, EINER P. BRADSTRUM, AND ORA U. GRANT, OF SPARTA, MICHIGAN.

FURNACE.

Specification of Letters Patent.

Patented Mar. 20, 19117.

Application filed March 21, 1916. Serial No. 85,627.

To all whom it may concern:

Be it known that we, GUs'rAF E. Ross, EINER I BRADSTRUM, and ORA U. GRANT, citizens of the United States of America, residing at Sparta,.in the county of Kent and State of llfichigan, have inventcdcertain new and useful Improvements in Furnaces; and we 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.

This invention relates to a furnace, and it is an object and purpose thereof to provide a furnace of the horizontal type in which the products of combustion may be carried back and-forth through a 'adiating drum so. that a very large percentage of heat from said products of combustion will be given off to the hot air chamber of the furnace. A further object of the invention consists in the provision of a novel heat insulating space around the furnace through which air passing to the hotair chamber may be drawn, this air as it passes through the space receiving the heat which would otherwise be lost to the outside. Many other objects and purposes consisting in a novel construction of fire box, novel means for carrying air down on to the fire and in many and various details of structure for the economical production of the furnace will be apparent as the description progresses of the preferred embodiment of our invention shown in the accompanying drawings, in which:

Figure 1 is a section taken upon the line 1-1 of Fig. 2. r

Fig. 2 is a longitudinal section taken centrally of the furnace.

Fig. 3 is a vertical section on the line 3--3 of Fig. 2; and

Fig. 4 is a front view of the furnace.

Like reference characters refer to like parts throughout the several views of the drawings.

In the construction of the furnace, front and rear supporting plates 1 and 2 are provided, the former having a rib 3 at its edges projecting to the rear while the latter has a similar rib 4 at its edges projecting forwardly, these ribs serving as a-support for the ends of a curved drum 5 under which the products of combustion pass. A fire box and ash pit construction is located at the forward and lower end of the furnace immedi- 2 of the furnace.

ately back of the plate 1, there being an opening in this plate for the passage of fuel to the fire box. This construction includes a base 6 from which at each side project upwardly the sides 7. An irregular shaped member 8 of the same length as sides 7 is positioned directly above the upper edge of each side, its upper end curving inwardly as shown at 9 while at a plurality of points in the length outwardly extending cars 10 are formed, the lower edges of the drum 5 coming inside of these cars and being secured thereto permanently in any suitable manner. The back of the ash pit and fire box is formed by'a plate 11. Between this plate and the rear member 2 a pair of upper bars 12 in alinement with the members 8 are provided and are fastened securely in place,

:these serving asa support for the cross member 13 located back of the fire box and between it and the rear member 2, the plate forming in effect a fioor for the chamber through which the products of combustion pass. Ears 14 similar to the cars 10 project upwardly and outwardly from the bars 12 and that portion of the drum 5 back of the fire box is connected to said ears.

The fire box proper which holds the burning fuel is located within the sides 7 and comprises sides 15 near the lower edges of which is located a grate 16 of any suitable formation. Bars 17 interposed between the members 15 and 7 serve to support said sides 15 with spaces 18 between the sides 7 and 15.

Attached adjacent the edges of each of the members 1 and 2 are rings 1!) Z-shaped in cross section 'whi ch at their outer edges serve as a support for a drum 20 of thin metal, the

lower edges of which are extended downwardly terminating short of each side of the sides 7, said drum being fastened securely to the front and rear supports 1 and Between the fire box and the rear of the furnace are positioned upright thin lower bars 21, a space 22 being left between the lower edges of the drum and said lower bars and the sides 7 of the ash pit through which air may pass into the space 22 between the drums 5 and 20, it being apparent that this space is lapted to receive heat through the walls 5 to heat the air therein which, drawn through the openings 22, passes out through the furnace pipes 24: and is carried by any suitable conduits to rooms of the dwelling in which the furnace is installed. In order that the prod ucts of combustion shall transfer all the heat possible through the drum 5 to this hot air space a partition or fine 25 is located above the fire box and runs from the front end of the drum to a point near the rear end being then turned down as indicated at 26. Similarly an upper horizontal fine 27 leads from the rear support "2 to adjacent the front support, there however, being left a space for the passage of the products of combustion which going first from the fire box pass under the partition 25, then around its rear end and under the partition 27, then around its front end and between said partition 27 and the upper side of the drum and thence through the outlet 23 which leads to the chinmey. it cleanout member 21) is secured to the rear face of the support 2 being normally closed by a door 30 and, through an opening 31 which communicates with the space above the partition 27, any soot or the like may be readily witlnlrawn. Similarly there is a clean-out 32 at the front end above the partition 25 which closed by doors 33, an opening 3i through the front support 1 permitting access to the combustion chamber above both partitions 25 and 27.

Entrance to the fire box is ha d through the opening 35 normally closed by a furnace door 36. There is similarly an entrance to the ash pit through the door 37 and directly above the ash pit door a sliding draft 38 is provided through which air may pass into the spaces 18 being thence directed downwardly by the curved ends 9 on to the fire above the grate 1.6. The entire front of the furnace may be formed by a casting 39 in which the various openings and 35 are made, on which the various doors 33, 36 and 37 are mounted and in which the sliding draft 38 is positioned.

Spacing rings 40 and 41 extend outwardly from the members 19 and serve to position an inclosing drum l2, the lower ends of which are brought down against the sides 7 and the plates 21 heretofore described, being fastened thereto as indicated at &3, this leaving a narrow space 44 between the outer drum l2 and the drum 20 which incloses the hot air space. Passages 15 lead into this space from points in the drum 42 below the furnace pipes 24: and air may be drawn therethrough, warmed as it passes over the drum 20 and carried through the openings '22 to the hot air chamber 23, it being evident with this construction that none of the heat is lost by radiation into the basement where a furnace is installed but that such heat is utilized to warm. the air which passes to the furnace fire.

A furnace of this character is especially easy to manufacture and assemble having no complicated parts to be cast or finished. The passage of the products of combustion back and forth through the drum 5 causes an especially large amount of radiation to the hot air chamber. The heating of the air passing to the hot air chamber is yet another source of economy which makes the furnace especially economical in use. Many minor details of structure may be changed without departing from the invention defined in the appended claims and accordingly we consider ourselves entitled to all modifications of structure falling within the scope of the appended claims, which define the invention.

We claim 1. In a furnace, an ash pit comprised of a base, upwardly extending sides and a back, a fire box located above the base and comprised of sides spaced from the sides of the ash pit and a grate, front and rear supporting plates, upper and lower bars interposed between the back of the ash pit and the rear supporting plate, a drum located between and supported by said plates, connections between the lower edges of the drum and the upper bars and ash pit, a floor between the upper bars completing the combustion chamber, an air inclosing drum around and spaced from the first drum, means closing the openings at the ends of said drums to thereby form an air chamber, and means for conducting the heated air away from the air chamber.

2. In a furnace, an ash pit comprised of a base, upwardly extending sides and a back, a fire box located above the base comprised of sides spaced from the sides of the ash pit and a grate, extensions to the sides of the ash pit curved inwardly over the fire box, means to enter air into the spaces between the sides of the fire box and ash pit, a drum to carry the products of combustlon, an outlet thereto, an air drum surrounding said first drum and fire box and conduits leading therefrom.

i 3. In a furnace, a fire box and ash pit, a

horizontally positioned drum covering said fire box and ash pit and extending to the rear thereof and adapted to receive products of combustion, front and rear supporting plates for the drum, bars between the ash pit and rear support to which the drum is secured, at floor closing the space between the bars, a flue located across the drum and extending from the front support to adjacent the rear support and having a down turned rear end, a similar flue within the first flue projecting from the rear support to adjacent the front support, an air inclosing drum surro'lniding the inner drum, means to conduct the combustion products from the inner drum, and means to conduct heated air from the air inclosing drum, substantially as described.

4. In a furnace, front and rear supports, an ash pit and fire box construction located back of the front support including a base,

sides and back with a grate supported above the base, upper and lower bars between the back of said fire box construction and the rear support at each side of the ash pit, a floor supported between the upper bars, a drum supported at its ends by said front and rear supports and having edges turned downwardly and connected to the sides of the fire box and said upper bars, a ring of substantially Z- shaped cross section secured to and projecting to the front and rear of the front and rear supports, respectively, a drum inclosing an air space supported at the ends by said rings and turned to bring its edges adjacent but spaced from the sides of the ash pit and said lower bars, means to secure the drum in place, a member provided with openings leading into the fire box and ash pit secured in front of the front support and doors to said openmgs.

5. In a furnace, a fire box, an ash pit having sides spaced from the fire box and extended above and turned inwardly over the sides of the fire box, a horizontal drum to receive products of combustion from the fire box, a drum inclosing the fire box and said first drum, a member provided with Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

openings leading to the fire box and ash pit and to the spaces between the sides of the ash pit and fire box secured at the front of the furnace, doors to said openings to the fire box and ash pit, and a movable closure for the openings leading to said spaces between the fire box and ash pit.

6. In a furnace, a fire box and ash pit, a drum to receive the products of combustion from the fire box, a flue extending from the front of the drum to adjacent the rear thereof and having a down turned rear end, a flue above and within the first flue secured to the drum and having its front end terminating short of the front of the drum, an outlet communicating with said last mentioned fine to carry away the products of combustion, a drum in'closing an air space between it and the first drum, and an outer drum in'closing an air space between it and said second drum, said air space communicating with the space between the inner and second drums.

In testimony whereof we afiix our signatures.

GUSTAF E. ROSE. EINER P. BRADSTRUM. ORA U. GRANT.

Washington, D. G.

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