US2672137A - Flue structure for gas ranges - Google Patents

Description

March 1954 J. E. CHAMBERS ET AL 2,672,137

FLUE STRUCTURE FOR GAS RANGES Filed March 8, 1950 2 Sheets-Sheet l March 16, 1954 J. E. CHAMBERS ET AL FLUE STRUCTURE FOR GAS RANGES 2 Sheets-Sheet 2 Filed March 8. 1950 llflllllllllllrllrllllll I I I z 5 I l I I I 2 Patented Mar. 16, 1954 FLUE STRUCTURE FOR GAS RANGES John E. Chambers and Shelhyville, Ind, assign poration, a corporation Thomas Esta Phares, ors to Chambers Corof Indiana Appiication Mai-011.8, 1950, Serial No. 148,466

2 Claims.

This invention relates to a gas range .or stove, and has particular reference to a gas stove having a low back splasher unit into which is built a flue for venting the products of combustion into the atmosphere above the cooking top of the .stove. In the back splasher unit of the present invention, the back splasher plate forms the front wall of the flue.

Gas stoves have been constructed heretofore with a flue outlet in the back to permit the escape of the products of combustion formed during the ignition and the burning of the gas burners of the oven or broiler. When the gas stove ispositioned against one wall of the kitchen the restricted area of the conventional flue outlet causes the flue gases to leave as a hot blast which stains or discolors the kitchen wall adjacent the flue outlet. Gas stoves have also been constructed with one or more flue outlets of restricted dimensions in the front.

In such stoves the flue gases are discharged as a blast or blasts across the cooking top, which by themselves and additionally because they are hot are objectionable.

In the gas stove constructed in accordance with the present invention the area of the flue outlet is greatly increased and hence the blast of flue gases is completely eliminated. In this stove the flue gases are vented in a gentle stream discharging over the cooking top of the stove.

The flue outlet of the stove of the present invention is provided with an insulated back having a front wall which curves forwardly to direct the flow of the flue gases in the desired direction. The insulated back is shaped to provide a completely isolated dead air space between the inside of the insulated back, the flat top tray section and the top portion of the back splasher plate, thereby keeping the tray section and the top portion of the back splasher plate coolwhile the flue gases are being expelled.

The structure by which the above and other advantages of the present invention are attained will be describedin thefollowing specification, taken in conjunction with the accompanying drawings showing a preferred illustrative embodiment of the invention, in which:

Figure 1 is a fragmentary front perspective view of a gas stove embodying the invention;

Fig. 2 is a fragmentary rear perspective view of the top portion of the stove with a section cut away to better illustrate the structure by means of which the flue gases are vented to the front and discharged in a gentle stream across the cooking top;

the flue outlet Fig. 3 is a verticalcross sectional View through the top portion of the stove, taken along the line 33 of Fig. 2;

Fig. 4 is a fragmentary horizontal cross .sectional view, taken along the line 4-4 of Fig. 3';

Fig. 5 is a fragmentary front elevation of the back vertical portion of the cooking top of the stove and of the back splasher unit;

Fig. 6 is a horizontal cross sectional View, taken along the line 6-4: of Fig. 3; and

Fig. 7 is a cross sectional view, taken along the line 'i-7 of Fig. 6.

In the drawings, the reference numeral 2 indicates a gas stove having a cooking top .3. The stove is provided with an insulated back behind the back splasher 2:], comprising a back Wall .4 having a flange 5 extending at right angles to the bottom of wall 4 to space the back wall from an inner wall section .6 which forms the front of the insulated back. Insulation ,1 such as rock wool, glass wool and the like fills the space be.- tween walls 4 and B. The upper portionof wall 6 is curved forwardly, as indicated all and then rearwardly, as indicated at ,9, forming abulged portion H1 in the insulation, The lower portion of th u m d y wall p rtionfi, consti tutes the means for directing the flow of flue gases forwardly.

The ck of the i ulated Wall is spaced from the wall by a flange Ii extending rea-rwardly at right angles fromthe top edge of Wall 4. The upper portion of wall sbeyond rearwardly curved portion ,9 extends in juxtaposition to flange ll, as indicated at l2, to close the top Of the insulated back. The ends of the insulated back are closed by end walls 13 and 14. These walls extend forwardly from the insulated back into abutting relationship with back splasher plate 20. The forward extremities of the end walls are shaped to conform with the contour of the splasher plate and make a tight flt therewith. Thus a flue is formed between back wall 6. smash r plate 29 and end .walls .13 and H. The loweredge of wall .26 extendsbelowiiange 5 to provide a verticallyextending portion 15 secured to the body back 16 of the stove. The back I6 is provided with vents l1 forwardly of wall 6 to permit the flue gases to flow from the area in which they are formed to the flue space in front of wall 6. Vents l1 extend intermittently across the entire width of the stove and present the maximum opening, the interruptions being only for the purpose of providing strength for this portion of the body back.

The rear edge of cooking top 31s bent upwardly,

as indicated at 18, and then horizontally in a rearward direction to form a flange N. The back splasher plate 20 has a lower flange 2i secured to flange 19. A metal molding strip 22 is positioned forwardly of flanges I9 and 2i to conceal the joint therebetween. The back splasher plate 20 extends upwardly from flange 2!, as indicated at 23, and then forwardly, as indicated at 24. The forwardly extending portion of the back splasher plate starts approximately at the same horizontal level as curved portion 8 of wall 6 and follows the same general lines. Portion 24 is provided with large, elongated openings 25 extending substantially across the forwardly extending portion 20: of the back splasher plate to direct the flue gases in a downward direction as they are deflected forwardly by contact with portion 9. Back splasher plate 20 extends vertically from the upper edge of forwardly extending portion 211, as indicated at 26, and then rearwardly to form a top tray section Bl. Tray section 27 extends slightly beyond the ends of the stove, as indicated at 28, to give the back splasher plate a smoothly finished appearance, and is provided with an inwardly extending flange 29 which extends across the entire width of the stove.

The hot flue gases coming up through vents i'i strike against curved surface 9 and are deflected forwardly. The bulge 19 offers additional insulation in the area that would otherwise be heated excessively by the continuous bombardment of hot gases and thereby keeps the back of the stove cool. In this connection it will also be noted that flange ll spaces the insulating back from the kitchen wall so that extra insulation is provided by the air space between the stove and kitchen wall even when the stove is pushed flush against the wall. The flue gases flowing forwardly from curved portion flow downwardly through apertures 25 and are discharged into the atmosphere adjacent the cooking top of the stove where they are hardly noticeable. The flow of the flue gases against curved portion 8 and through apertures 25 leaves a dead air space adjacent the curved portion 9 which provides insulation to keep the tray top section 27 cool. Although the back of the stove is relatively short, the flue gases are cooled and discharged in an area where they can not possibly discolor the wall of the kitchen adjacent the stove. The width of the opening 25 is substantial, relative to the width of the flue, so that the flue gases are not restricted at the outlet, but flow through the opening into the atmosphere above the cooking top in a gentle stream.

Although we have described a preferred embodiment of the invention in considerable detail, it will be understood that the description thereof is intended to be illustrative, rather than restrictive, as many details may be modified or changed without departing from the spirit or scope of the invention. Accordingly, we do not desire to be restricted to the exact structure disclosed.

We claim:

1. In a gas stove, a cooking top, a back comprising a wall extending above the cooking top, a flue having said wall as its back wall and having a front wall spaced forwardly of said back wall, said front wall having an elongated outlet extending substantially across said front wall, said outlet being directed downwardly and forwardly, the back wall of said flue having a horizontally disposed forwardly extending bulge having its lower portion curved forwardly and upwardly to direct the normal upward flow of the flue gases forwardly towards said flue outlet, said front wall joining said back wall at a region above said bulge and said outlet and forming a dead air space above said bulge and said outlet.

2. In a gas stove, a cooking top, an insulated back comprising a pair of spaced walls having a layer of insulation therebetween, said insulated back extending above said cooking top, a flue positioned forwardly of said insulated back, said flue having the foremost wall of said pair of spaced walls as its back wall and having a front wall secured to said cooking top and extending upwardly from said cooking top in spaced relationship to said insulated back, said front wall extending rearwardly at its upper edge to form a horizontal tray top the rear end of which is posit" ned above said insulated back, said flue having a forwardly and downwardly directed outlet, the upper edge of said outlet being positioned below the plane of said tray top, said flue and outlet being of substantial width, and a forwardly o -nded bulge in said insulated back extending across the entire width of said flue and having its lower portion curved forwardly and upwardly in substantial alignment with said outlet, whereby a dead air space extending across the entire width of the flue is formed between the upper edge of said outlet and the bottom surface of said tray top, the flue gases normally flowing vertically upwardly in said flue being deflected forwardly by said bulge and caused to be discharged into the atmosphere above said cooking top in a gentle stream without coming into contact with the underside of said tray top.

JOHN E. CHAMBERS. THOMAS ESTA PHARES.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,158,881 McCormick May 16, 1939 2,309,784 Peron Feb. 2, 1943 2,376,571 Brurnloaugh May 22, 1945 2,438,035 Buhman Mar. 16, 1948 2,452,? 15 Bauer Nov. 2, 1948 2,480,044 Reeves Aug. 23, 1949 2,482,952 Warren Sept. 27, 1949 2,512,521 Davidson June 20, 1950 2,526,890 Mendel Oct. 24, 1950

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