US2438035A - Stove - Google Patents

Description

Patented Mar. 16, 1948 1 STOVE Conrad J. Buhman and Leo E. Mendel, Chicago, 111., assignors to Cribben and Sexton Company, Chicago, 111., a corporation of Illinois Application November 18, 1944, Serial No. 564,032

This invention relates to a stove, and more particularly to a stove having an oven or cook- 3 Claims. (Cl. 12639) ing compartment with improved closure structure.

In the use of gas ranges and other cooking stoves, it is quite undesirable that the oven door become heated during the use of the oven. Not only does this represent a waste of fuel, but the hot oven door is a hazard and inconvenience to the housewife who operates the stove.

Heretoiore, attempts have been made to overcome this objection by filling the oven door with insulating materials. However, such constructions have not succeeded in preventing the access of heat to the front of the stove. In all such prior constructions, it has been necessary to have metal edges about the door which have the effect oi. conducting heat from the interior of the oven to the front of the door.

An object of the present invention is to provide a stove having an improved oven or cooking compartment closure, which closure is efficient in preventing the heating of the front of the oven door.

More specifically, it is an object of the invention to provide a closure for the oven opening, which closure is spaced from the door by an insulating air space. Another object is to provide such a door and closure structure which has a vertical air passage therethrough through which air may pass by convection and carry the heat from the oven, keeping the heat away from the oven door. Still another object is to provide a stove having the improved door and closure structure which includes an inner plug member spaced from the door and wherein the plug member is secured to the door by bolts inward of the periphery of the plug, which bolts may be adjusted to enable an exact fit with the opening in the oven. Other objects and advantages will be apparent as the specification proceeds.

bodiment by the accompanying drawing, in

which Fig. 1 is a perspective view of a stove constructed according to the invention; Fig. 2 is' an enlarged sectional view in elevation, the section being taken as indicated at line 2-2 in Fig. 1; Fig. 3 is an enlarged fragmentary view showing the top of the oven door and the plug member; and Fig, 4 is a detail sectional view taken as indicated at line 4-4 of Fig. 3.

As indicated at Fig. l of the drawing, the improved stove has a front appearance similar to stoves already known to the art. Although the invention is illustrated by its application to The invention is illustrated in a preferred ema gas range, it may be applied to any type of heater unit, including electric stoves or ranges and oil-burning stoves or ranges. The stove here illustrated has a burner section III, an oven section II, and a broiler section i2. The front surfaces of each section are substantially ilushv and a neat appearance is presented. The accessories, such as the backboard i3, burner covers [1, knobs i4, and door handles l5 and 16, are features which may be varied as desired.

Referring now more particularly to Fig. 2 of the drawing, there is contained in the burner section ID the burners i8 which are disposed under the openings I9 in the top plate 20. At the front, the top plate 20 joins with the vertical front panel 2|.

The oven section II, below the burner section, contains the oven compartment 22. This conipartment is formed by the top wall 23, the rear wall 24, bottom wall 25, and the side walls. The top wall 23 contains an inner metallic wall 26 and an outer metallic wall 21 between which is the insulating material 28. The rear wall 24 and the side walls are similarly formed. At the front of this oven structure is the opening 29, the edges of which, at 30 and 3|, are beveled, the beveled surface being inclined inwardly and rearwardly.

Closing the oven opening 29 isthe plug member 32. This member has the front metallic wall 33 and the rear metallic wall 34, and between these walls is insulating material 35. At the peripheral edges of the member, the inner or rearward metallic wall is turned outwardly and secured to a flange of the outer wall by a screw 36, as more clearly shown in Fig, 3 of the drawing. It may be noted that the edge of this member is provided with a tapered surface 31.

This tapered surface corresponds with the I effectively close the opening.

ployed and therefore do not show in a view such as Fig. 1.

The plug member 32 is secured with the door 40 by means of a number of bolts 44. This tains the holes 45 and corresponding and opposite holes 46 are contained in the metallic wall 83 of the plug member. A bolt 44 extends through the holes 45 and 46. The head 41 of the bolt and lock washer 48 are preferabl at the rear of the metallic wall 33 on the interior of the plug member. A nut 49 on the interior of the door engages the bolt and looks it tight with respect to the door. Nuts 50 and ii are disposed on the bolt and engage the adjacent walls of the door 40 and plug member 32. These nuts provide for adjustment of the spacing apart of the door and the plug member.

It may be noted that the opening 45 in the door wall is substantially larger than the cross sectional area of the bolt 44. This feature is more clearly brought out in Fig. 4 of the drawing. The purpose of this is to permit shifting of the plug member with respect to the door either vertically or laterally to adjust the plug member for exact fit with the opening of the oven. The bolt and nut structure also allows the plug member to be secured at greater or lesser spacing from the door. This permits adjustment to make the plug come into fitted engagement when the door reaches its vertical closed position. The adjustment of the door with respect to the plug is preferably made at the factory since access to the interior of the door is needed for the tightening of the nut 49.

In the broiler section [2 of the stove, there is a second cooking compartment 55. The top of this compartment is formed by the plate 84 which has a downward extension 58 at the front. The downward extension 56 is turned inwardly at its lower edge to form the beveled edge 51. The bottom of the broiler compartment is formed by the plate 58 which forms a similar bevel at its forward edge 59.

Closing the front opening ill in the broiler section is the plug member 85 which has the inner and outer metallic walls 4' and I1 respectively with the insulating material 08 between these walls. Its edges are tapered at I! to correspond with the bevel of the broiler opening and it is constructed of such size and shape as to exactly fit this opening.

A broiler structure 10, within the broiler section, is carried on the rollers II and is adapted to move forwardly out the front opening 80 to a point where there can be easy access thereto from the front of the stove.

The broiler door 15, disposed in front of the opening 80, is constructed with outer and inner metallic walls with insulating material therebetween, a construction similar to that used in connection with the oven door 40. This broiler door 15 is pivotally mounted by concealed hinges to the sides of the broiler structure 10, the hinges being at each side near the lower portion of the door.

The plug member 85 is secured to the door 15 and in spaced relation with this door by the bolts 18, such bolt means being similar to the bolt mounting used in connection with the oven door 40. The member 65 therefore moves with the door 15 when this door is moved about its pivot. The door may be pulled forward to remove the plug member 85 from the opening 60 and to bring the structure 10 out through the broiler front opening.

The bolts 44 which secure the plug member 32 to the oven door 40 are preferabl disposed inwardly of the periphery of the plug member. This structure avoids any substantial heat conduction to the door through the bolts. The inner metallic wall 34 is unavoidably in contact with oven heat and there is conduction through this metallic wall to the edges of the plug member. Such path of direct heat conduction is avoided by having the bolts placed inwardly of the periphery. The same may be observed with respect to the placement of the bolts T6 securing the plug member to the broiler'dcor 15.

By having the plug member 32 mounted in spaced relation to the oven door 40, there is provided an air space or passageway 80 through which the air may pass upwardly between the plug member and the door. The upper end of the passageway 80 may communicate with a duct 83 which extends horizontally across the top of the oven and communicates with the oven flue 82. In this way, the air which travels through the passaageway 80 passes through the duct 83 and into the flue 82.

Where, as in the embodiment described, there is a similar construction in connection with a broiler below the oven, the air passageway extends from the bottom of the broiler-door upwardly inside both broiler and oven doors into the burner section of the stove. Instead of having the oven above and the broiler below, the broiler may be disposed above the oven while still employing the improvements ofthis invention. The invention is also applicable to a unit in which either the broiler or oven is eliminated. If the broiler is eliminated, a conventional utility drawer or dummy panel may be substituted for it. In any event, an air inlet is provided at the lower end of the passageway 80.

Theprovision of the air space between the plug member and the door is effective in keeping the door at a low temperature thou h the oven or broiler cooking compartments be very hot. This is explained by the fact that the plug member has a minimum of heat-conducting metallic connection with the door and also by the fact that air currents may pass upwardly between the door and the plug member to carry off the heat which may be radiated by the plug member.

Although but a single embodiment of the invention is illustrated, it is evident that many,

widely-differing modifications may be constructed, all within the spirit and scope of the invention.

We claim:

1. In a stove, a casing providing a plurality of vertically-spaced cooking compartments, a top burner section above said cooking compartments and spaced from the compartment below by a passage leading to the rear of the stove, insulated doors carried by said stove and closing the front endsof said compartments, said doors being provided with aligned cooling passages extending vertically therethrough and communicating with the passage below said burner section, and a flue outlet means from at least one of said cooking compartments and rising vertically at the rear of the stove, said flue communicating with said passage below said burner section.

2. In a stove, acasing providing a plurality of vertically-spaced compartments and a burner section above the upper compartment, said burner section being spaced from the compartment below to provide a substantially horizontal pas sage over the top of the upper compartment, means for heating said upper compartment, an outlet means from said upper compartment and rising vertically to discharge heated gases from the top portion of the stove, said outlet communicating with said passage, and doors closing said compartments, the door for said upper compartment at least being provided with a vertical cooling passage communicating with the passage above said upper compartment.

3. In a stove, a casing providing a plurality of vertically-spaced compartments and a burner section above the upper compartment, said burner section being spaced from the compartment below to provide a passage extending over and to the rear of said upper compartment, vent means for said passage leading upwardly therefrom, means for heating one of said compartments, an outlet means leading from said heating compartment to said vent means to heat the gases therein and induce suction in said passage over said upper compartment, and doors closing said compartments, the door for the upper compartment, at least, being provided with a vertical cooling passage communicating with the passage above sai upper compartment.

CONRAD J. BUHMAN. LEO E. MENDEL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Great Britain June 22, 1933

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