US1385310A - Gas-stove - Google Patents

Description

J. F. DOMHOFF AND R. M. SABO.

Pdtented July. 19, 1921,

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EUDUEIEIE] SUEDE] J. FQDOMHOFF AND R. M. SABO. GAS STOVE.

' APPLICATION man IAN-3,1921.

1,385,310. Patented July 19, 1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

JOHN F. DOMHOFF AND ROBERT M. SABO, OF EAST ST. LOUIS, ILLINOIS.

GAS-STOVE.

To all whom it may concern lle it known that we, JOHN F. DoMHorr and llonnn'r M. Sane, citizens of the United States, residing at East St. Louis, in the "county of St. Clair and State of Illinois,

have invented certain new and useful Improvements in Gas-Stoves, of which the following is a specification.

he present invention relates to gas stoves, articularly of the heating type.

An oliject of the present invention is to provide a stove structure wherein the gases issuing from the one or more burners will be completely consumed before leaving the stove structure to prevent the eseape of unconsumed gases into the room or inclosure in which the stove is used.

Another object of the invention is vide a gas stove structure which may he made economically from sheet metal, for the most part, and which is so constructed as to efficiently utilize the heat radiating from a single burner for heating a relatively large volume of air maintaining a relatively large volume of the air in constant circulation in the room or inclosure.

The above, and various other objects and advantages of this invention will in part be described in, and in part understooc from, the following detailed description of the present preferred embodiment, the same be- 1ng illustrated in the accompanying drawings, wherein;

Figure 1 is a front elevation of a heating stove constructed according to the present invention;

Fig. 2 is an end elevation of the same;

Fig. 3 is a top lan view thereof;

Fig. 4 is an en arged transverse section through one corner of the stove, showing the manner of locking the side walls of the stove together;

Fig. 5 is a fragmentary enlarged vertical section through the upper end of one of the corner posts of the stove, showing a cap iece and the position of the stove top there- Eeneath;

Fig. 6 is a fra mentary enlarged vertical section through t corner posts showing a foot piece applied thereto;

Fig. 7 is a transverse section taken through the stove substantially on the line 77 of Fi 8' I l ig. 8 is a. longitudinal section taken from to pro- Specification of Letters Patent.

e lower end of one of the Patented July 19, 1921 Serial No. 434,718.

side to side through the stove and substantially mid-way between the front and back walls thereof;

Fig. 9 is a fragmentary enlarged section taken through a portion of the front wall of the stove, showing a side opening and air feeding opening for the burner;

Fig. 10 is a. detail enlarged outer end view of the burner and its fittings; and

Fi 11 is a fragmentary enlar ed sectiona view through the outer cm of the burner, showing the manner of mountin the same in the front wall of the stove.

eferring to these drawings, wherein like parts are designated by similar numerals of reference throughout the several views, the stove comprises a front wall 20, a rear wall 21, and opposite end walls 22 and 23.

he walls are preferably made from thin sheet metal and at opposite ends, as shown in Fig. 4, are bent at right angles to form locking flanges 24, and the flanges 24 are turned outwardly, or toward the outer sides of the walls to provide abutting angles 25 at the ends of the walls and forming corresponding pockets or shoulders at the opposite sides of the walls between the flanges 24 and the bodies of the walls.

The ends of the walls are held together by posts or standards 26 of tubularform and which are split longitudinally throughout their lengths and adapted to be spread at the split for frictionally receiving therein the angle portions 25 of the walls.

The inherent resiliency of the tube 26 is adapted to bind the angles 25 together, and the flanges 24 are of sufficient length to engage the inner walls of the tube 26 to yieldlngly urge the split edges into the shoulders or pockets formed in the outer sides of the angle portions. Thus, the flanges 2-1L hold the angle portions 25 in alinement and the s lit tube 26 binds the ends of the walls to et er.

hese posts 26 may be provided with cap pieces 27 in the form of threaded ferrules engaged over the upper ends of the tubes 26 to maintain the same tight against the angles of the walls, and the ferrules may have fanciful configuration at their upper ends for the purpose of ornamentation, and as shown, are of substantially spherical or ball sha e. i

e lower ends of the tubes or posts 26 may be provided with foot pieces 28 of rubber or'like material in the form of ferrules adapted to be fitted over the lower ends of the tubes for supporting the same and to prevent injuryto floors and other surfaces upon which the stove may rest.

The walls of the stove are overturned or crimped at their lower ends to provide a double thick depending flange 29 extending entirely upon the bottom of the stove body for reinforcing the same, and the up-turned edges of the walls are projected inwardly toward each other to form an inner ledge 30 which also tends to make 'rigidthe lower end of the stove body.

The upper' ends of the body walls are crimped outwardly to form a reinforcing bead 31 which strengthens the upper end of the stove body and which is adapted to receive thereover the depending flange 32 of a top wall or cover 33.

The cover 33, as shown in Figs. 3 and 8, maybe made from sheet metal with its depending flange 32 and with openings 34 at its corners through which the corner posts 26 may project. The cap pieces 27 are adapted to be screwed downover the upper. ends of the corner posts and thus bind the cover 33 upon the upper edges of the body walls.

It will be noted that the upper edges of the walls terminate in in-turned flanges,

completingthe formation of the beads 31, and thus provide 'a relatively broad supporting edge about the upper margin of the stove body for supporting the top 33. V

The'top 33 may be provided with any suitable openings through which heated air passing upwardly through; the stove body may escape, and in the present instance, the top 33 is provided with a grating 35 formed by stamping or otherwise cutting rows of aperturesin the top. j

The body of the stove is-providedwith three main elements, a moistening pan 36, a heating drum 37 and a super-heating drum 38.

The moisture pair 36 is of suitable size and is slidably mounted upon a pair of cleats 39 which are secured across the lower ledges 30 of the stove and which is removable through an opening formed in the bottom portion of the front wall 20. Preferably, the forward end of the pan 36 is provided with a cover plate 40 adapted to fit. against the exterior surface of the front wall 20 and close the pan 36 therein, the cover plate 40 carrying 'a suitable knob or handle41 by means ofiwhich the pan may be easily and quickly removed andreplaced. I

'The bottom of the stove is otherwise left uninterrupted for the free passage of-air upwardly therethrough. Above the moisture is disposed theheating drum. This comprises a sheet metal structure which is of .a lengthslightly less than that of the ,stove'body to provide, between the ends of the drum 37 and the end walls 22 and 23 of the stove, passages 42 for the air which rises about the moisture pan 36.

. From Fig. 7 it will be noted that a passage 42 is provided at the back of the drum 37 as well as at its sides. The forward side of the heating drum 37 terminates in an opening 43 formed in the front wall 20 of the stove and through which air may readily pass to the interior of the heating drum 37, and if desired a transparent pane 44 may be placed in the front wall 20 above the opening 43 to permit inspection of the interior of the heating drum 37 for determining the condition of burning of the gas therein.

The top of the heating drum 37 is left open and the drum 37 is supported in the stove body by straps or cleats 45, suitably spaced apart about the drum 37 and secured at their lower ends thereto and at their outer ends to the walls of the stove body.

For the purpose of directly heating air in the drum 37 a burner tube 46 is arranged lengthwise therein, the inner end of the tube 46 being supported by a depending flange 47 on the tube secured by a screw 48 or the like to the inner wall at one side of the drum 117.

The other end of the burner tube 46 is enlarged, in the usual manner, and, as shown in detail in Fig. 11, is provided with an external annular shoulder 49 adapted to seal in an outward depression 50 formed in the adj acent side wall 22 of the stove body and .the shoulder 49 is adapted to support the outer end of the burner tube and to also hold the burner tube from shifting longitudinally through the heating drum 37.

As shown in Fig. 7, the burner tube 46 is preferably provided with a plurality of downwardly projected jets or openings 51 adapted to project streams of gas into the lower end of the drum 37 for insuring a complete burning of the gases during their passage upwardly through the drum 37.

The burner tube 46 is provided with a suitable gas cook 52 connected to a flexible tubing 53, or other suitable source of gas supply.

The super-heating drum 38 is preferably in the form of a sheet metal box open at its top and closed at its bottom and side and end walls to prevent a free circulation of air therethrough. This super-heating drum 33 is suspended by straps 54 from the beads 31 at the upper ends of the stove walls and is adapted to project down into the upper end of the heating drum 37 to a considerable extent, such as substantially half the depth of the super-heating drum 38.

The arrangement, of course, may be varied with conditions met. with in the use of the stove. The box or drum 38 is of less long-i tudiual and transverse dimensions than that of the upper end of the drum 37 so that there is provided about the super-heating fill l. Hl

drum 38 a passage or channel 55 for escape of the burning gases and air from about t 1e burner 46 to the top of the stove.

This super-heating drum 38 is placed immediately above the burner 46 so as to directly receive the intense heat therefrom and to thus be raised to a relatively high temperature. This rising in temperature of the super-heatin drum 38 is augmented by the fact that t e free circulation of air through the drum is considerably checked as the top of the drum only is open.

The result is that the air and gases assing upwardly through the drum 3 is brought in contact with the highly heated surface and in a restricted passage so that any gases which are unconsumed and tending to escape through the top of the drum 37 will be ignited and thoroughly consumed before the air and gases reach the top 33 of the stove.

By use of this super-heating drum the gases which escape from the burner of a gas stove and which are usually liberated into the room or inclosure, are completely consumed so that the air in the room or inclosure is not vitiated by reason of admixture of the free gases therewith.

The air which rises through the bottom of the stove body, carries with it a certain amount of moisture from the water pan 36 and the moisture laden air coming in contact with the drum 37, is heated thereby, and is caused to rise about the drum 37 and into contact with the super-heated air and gases issuing upwardly through the channel 55. The two streams of a1r and heated products of combustion are brought together beneath the top 33 of the stove and are caused to rise therethrough and thoroughly admix in their passage through the grating 35.

It is thus seen that there are two direct feeding passages through the body of the stove, one for the purpose of absorbing moisf ture to properly temper it, and the other for the purpose of insuring the complete and secondary combustion or burning of the gases which issue from the burner.

What is claimed is:

1. A gas stove comprising a stove body open at its top and bottom, a burner arranged in the body, a heating drum surrounding the burner and opening at its lower end through the front of the stove body and being open at its top, and a super-heating drum arranged above the opening in the lower end of said first drum and adapted to be heated by the burning of gases from said burner and adapted to ignite any gases liberated from the burner and tending to rise through said first drum.

2. In a gas stove, a body open at its bottom and top, a pair of drums arranged one upon the other in said body and providing inner and outer air passages within the body, means for supplying moisture to the air in one passage, and means for heating the air in the other passage.

3. In a heating stove, the combination of a body open at its top and bottom, a pair of drums arranged in the body and spaced from the walls thereof and from each other to provide inner and outer air passages, a burner arranged in one drum to directly heat ir therein and to heat the second drum, said second drum being adapted to ignite gases escaping from the first drum, and said drums being adapted to heat the air rising in both passages.

4. In a gas heating stove, the combination of a body open at its top and bottom, a heat ing drum mounted in the stove body and opening through the front wall thereof and being open at 1ts top, a burner in said heating drum adapted to directly heat air there in and effect upward circulation of air through the front wall and through the top of the drum, said drum being spaced from the walls of said body and providing an outer passage for air rising through the bottom of the body, and a super-heating drum suspended from the body into said first drum above the burner to be heated thereby and providing with said second drum a restricted passage for the directly heated air and gases escaping from the first drum, and means for supplying moisture E0 the air rising through the bottom of the ody.

5. In a gas heating stove, the combination of a body open at its top and bottom, a heating drum arranged in spaced relation to the bottom within the body and opening at one side through the front of the body and being open at its top, said heating drum being spaced from the walls of the body to provide an outer air passage, a moisture pan supported in the body beneath said drum and about which air is adapted to rise into said outer passage, a burner in said drum adapted to directly heat air therein and to heat the drum, a second drum suspended in the first drum and being of less dimensions than the same to provide a restricted passage for the rise of the directly heated air from the first drum, said second drum being adapted to be raised to a relatively high temperature whereby to ignite any gases tending to escape from said first drum.

JOHN F. DOMHOFF. .ROBERT M. SABO.

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