US2526890A - Circulating air passage structure for ranges - Google Patents

Description

Oct, 24, 1950 L. E. MENDE-,1

CIRCULATING AIR PASSAGE STRUCTURE FOR RANGES Filed Jan. 12,l 1946 Patented Oct. 24, 195@ CIRCULATING AIR PASSAGE STRUCTURE FOR RANGES Leo E. Mendel, Chicago, Ill., assigner to Cribben and Sexton Company, Chicago, Ill., a corpo'ra-V Y tion of Illinois Application January 12, 1946, Serial No. 640,698

6 Claims. (Cl. 12639) This invention relates, to improvements in stoves or ranges andmore particularly to stoves or ranges having an oven section and a burner section located above the oven section, and is directed to improvements on the stove or range disclosed in application Serial No. 564,032, led November 18, 1944, now Patent 2,438,035, by Conrad J. Buhman and myself jointly.

In the aforementioned application the stove or range is provided with an improved composite oven door assembly having a circulating air pasu sage therein to prevent heating of the front of the door and also with passages for conducting the heated air from the circulating air passage through the oven nue to an opening in the back guard of the stove.

An object of this invention is to provide improved means for conducting the heated air away from the circulating air passage in the oven door. In this respect, the circulating airpassage communicates with the interior of the burner section through an opening therein when the oven door assembly is closed. A flue then conducts the heated air from the circulating air passage through the burner section and also the heated air in the burner section to an opening in the back guard for discharge above the stove. Preferably a baille is provided in the burner section above the opening therein to direct the heated air from the circulating air passage rearwardly through the burner section toward the flue.

Another object of this invention is to provide a shield for closing the opening in the burner section when the oven door is opened to prevent oven gases from enteringr the burner section. In carrying out this object of the invention the shield may consist of the usual drip tray or a separate plate which are spring biased forwardly. When the oven door is closed, the shield is forced rearwardly to open the opening in the burner section to permit the heated air'from the air circulating passage in the oven door to pass into the burner section. When the oven door is opened, the shield is moved forward by the spring means to close the opening in the burner section to prevent oven gases from entering the burner section. i

A further object of this invention is to provide the hollow back guard which extends above the burner section with openings so directed that the heated air and gases discharging therefrom are directed forwardly and upwardly above the stove. The openings in the back guard separately connect with the oven section and the burner section through respective lues and an additional opening in the back guard also directs the heated air between the stove and the adjacent wall forwardly and upwardly above the stove.

While the various features of the invention thus far described are separately important, they cooperate with each other to the end resultof providing an improved stove having better in sulating, air and gas circulating characteristics'. The oven gases are at all times separated from the circulating air thereby improving the ciroulating characteristics of each.

Other-objects and advantages will become apparent to those skilled in the art upon reference to the accompanying specication, claims, and drawing, in which- Fig. 1 is a perspective view of the stove of this invention;

Fig. 2 is an enlarged partial sectional vview through the stove taken substantially along the line 2 2 of Fig. l

Fig. 3 is a view similar to Fig. 2 but taken substantially along the line 3 3 of Fig. 1 with the oven door assembly being shown in partially open position;

Fig. i is a partial rear view of the stove of Fig. 1.

The stove of this invention is generally designated at Hl and it includes a frame structure having side Walls Il and supported by legs I2. The hollow back guard I3 forming an extension of the side walls Il extends above the top of the stove at the rear of the. stove. The lback guard i3 and side walls Il are adapted to abut against a wall-and in so doing they form a chamber between the stove and the abutting wall.

The stove includes a burner section i4 having a front plate I5 cooperating with the side walls il. The stove also includes an oven section i6 located below the burner section I4 and having a door assembly I'l. A storage compartment may be located below the oven section I6 and may be provided with a suitable door or drawer I8.

The burner section iii of the stove may include a plurality of burners 2li supplied with gas through pipes 2i under the control of valves 22 extending through the front plate I5. The burner section Hi is provided with a to'p plate 23 having openings 24 corresponding to the burners 2li. If desired a suitable cover 25 may be provided for the top plate 23.

The oven section IG of the stove is defined by insulated walls 27 and has a front opening 28. The door assembly Il cooperates with the front opening 28 for opening and closing the same. The door assembly ll includes a plug member 29 having insulating material for sealing and closing the front opening 28. The plug member 29 is carried by an insulated door member 3U through bolts 3l which hold the plug member 29 and the door member 3U in spaced-apart relation to form an air circulating passage 32 therebetween. Air is allowed to circulate upwardly through the air circulating passage 32 to maintain the front of the door cool, as is explained in detail in the aforementioned patent application. The door assembly I1 may be provided with a suitable handle 33.

The burner section I4 is provided with an opening 35 above the front opening 28 of the oven section I6 so that when the door assembly I1 is closed the air circulating upwardly through the air circulating passage 32 may enter the burner section I4 through the opening 35 therein. A baffle 36 is provided adjacent the opening 35 for directing the circulating air rearwardly through the interior of the burner section I4.

It is important that the oven gases not be permitted to enter the burner section I4 because such gases contain grease vapors and other vapors which would coat and contaminate the burner section, and such grease coating would provide an impediment to the free iow of air through the section. With theconstruction thus far described oven gases from the oven section I could enter through the opening 35 into the burner section I when the oven door assembly I1 is moved fromv the closed position as illustrated in Fig. 3. In order to -prevent this a shield 38 is located between the oven section I6 and the burner section I4. The shield 38 may comprise a drip tray for the burner section I4 although a separate shield may be used. The shield 38 is biased forwardly by a spring 39 and the amount of forward movement of the shield 38 is limited by a stop 40. Abutments 4I are formed on the shield 38 to be engaged by the oven door section when the oven door assembly I1 is moved to the closed position for the purpose of drawing back the shield 38. Thus, as shown in Fig. 2, when the oven door assembly I1 is closed, the shield 38 is drawn back against the action of the spring 39 to permit the circulating air from the air circulating passage 32 to enter the burner section I4. When, however, as illustrated in Fig. 3, the door assembly I1 is moved toward the open position, the spring 39 moves the shield 318 forwardly to cause the shield to extend under the opening to prevent the passage of oven gases therethrough into the burner section I4.

At the rear of the burner section I4 a pair of baiiles 43 are provided to act in conjunction with the back guard I3 to form a ue for the burner section. The circulating air from the air circulating passage 3 2 entering the burner section I4 and the heated air in the burner section are conducted from the burner section I 4 through the flue 43 outwardly through an opening 44. in the back guard I3. In this way free circulation of the air through the air circulating passage 32 and free circulation of the heated air in the burner section I4 out through the opening 44 is provided.

The oven gases are conducted away from the oven section I6 through an oven flue 45 terminating in an opening 46 in the back guard I3. Thus the oven gases are separate from the circulating air and the heated air in the burner section whereby free circulation of the air and gases is at all times provided. This yseparation is maintained even though the oven door assembly I1 is open since the shield 38 then operates to prevent oven gases from entering the burner section I4.

The hollow back guard I3' cooperating with the extended side walls I I of the stove provide an air space between the stove and the abutting wall and the heated air in this air space is permitted to exhaust through the openings 41 in the back guard I3. This permits circulation of air between the stove and the wall to prevent overheating of the wall. If desired the iiue 45 may be provided with insulation to prevent overheating of the wall by the flue 45.

The openings 44, 46 and 41 in the back guard I3 are directed forwardly and upwardly so that the air and gases emanating therefrom are directed forwardly and upwardly above the stove.

While for purposes of illustration one form of this invention has been disclosed, other forms thereof may become apparent to those skilled in the art upon reference to this disclosure and, therefore, this invention is to be limited only by the scope of the appended claims.

What I claim is:

1. In a stove, a burner section having an opening in its lower front portion, an oven section below the burner section and having a front opening, a door mounted on the stove for movement with respect to the front opening of the oven section, a plug member carried in spaced relation by the door for opening and closing the front opening of the oven section, the space between the door and the plug member providing an air passage communicating with the interior of the burner section through said opening therein when the front opening of the oven section isclosed by the plug member, and a shield for closing the opening in the burner section when the plug member opens the front opening in the oven section to prevent oven gases from entering the interior` of the burner section.

2. In a stove, a burner section having an opening in its lower front portion, an oven section below the burner section and having a front opening, a door mounted on the stove for movementwith respect to the front opening of the oven section, a plug member carried in spaced relation by the door for opening and closing the front opening of the oven section, the space between the door and the plug member providing an air passage communicating with the interior of the burner section through said opening therein when the front opening of the oven section is closed by the plug member, a baille in the burner section above the front opening of the oven section for directing heated air from the air` passage between the door and the plug member rearwardly through the interior of the burner section, and a shield for closing the opening in the burner section when the plug member opens the front opening in the oven section to prevent oven gases from entering the interior of the burner section.

3. In a stove, a burner section having an opening in its lower front portion, an oven section below the burner section and having a front opening, a door mounted on the stove for movement with respect to the front opening of the oven section, a plug member carried in spaced relation by the door for opening and closing the front opening of the oven section, the space between the door and the plug member providing an air passage communicating with the interior of the burner section through said opening therein when the front opening of the oven section is closed by the plug member, and a spring biased shield controlled by movement of the door for closing the opening in the burner section When the plug member opens the front opening in the oven section to prevent oven gases from entering the interior of the burner section.

4. In a stove, a burner section having an opening in its lower front portion, an oven section below the burner section and having a front opening, a door mounted on the stove for movement with respect to the front opening of the oven section, a plug member carried in spaced relation by the door for opening and closing the iront opening of the oven section, the space between the door and the plug member providing an air passage communicating with the interior of the burner section through said opening therein when the front opening of the oven section is closed by the plug member, and a drip tray between the burner section and the oven section slidably movable under the control of the door for closing the opening in the burner section when the plug member opens the fronteopening in the oven section to prevent oven gases from entering the interior of the burner section.

5. In a stove, an oven section having a front opening, a door for opening and closing the front opening of the oven section, a burner section above the oven section and having an opening above the front opening of the oven section, and a spring biased shield controlled by movements of the door for closing the opening in the burner section when the door opens the front opening of the oven section to prevent oven gases from entering the interior of the burner section.

6. In a stove, an oven section having a front opening, a door mounted on the stove for movement with respect to the front opening of the oven section, a plug member carried in spaced relation by the door for opening and closing the front opening of the oven section, the space between, the door and the plug member providing an air passage, a burner section above the oven section and having an opening communicating the interior of the burner section with the air passage between the door and plug member when the front opening of the oven section is closed by the plug member, a hollow backguard extending above the burner section, a nue extending from the burner section through the backguard and terminating in an opening in the backguard for directing the heated air in the burner section and the heated air from the air passage between the door and plug member above the stove, and a shield for closing the opening in the burner section when the plug member opens the front opening in the oven section to prevent oven gases from entering the interior of the burner section.

LEO E. MENDEL.

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

UNITED STATES PATENTS Name Date Littleeld May 24, Grady Oct. 13, Syvertsen Mar. 3, Russell Mar. 8, 1921 Firestone Aug. 14, 1928 Teller et al Jan. 12, 1932 McCormick May 16, 1939 Sands May 14, 1940 Kritzer Nov. 5, 1940 Shroyer Apr. 8, 1941 Hennessy Dec. 14, 1943 Brumbaugh May 22, 1945 FOREIGN PATENTS Country Date Germany Sept. 10, 1887 Number Number

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