US2043316A - Combined range - Google Patents

Description

2 Sheets-Sheet l T T E N N E B COMBINED RANGE Filed Mar ch 7, 1934 W. BENNETT COMBINED RANGE Filed March 7', 1934 2 Sheets-Sheet 2 WLZZM/ 5M,

IN VEN T01? 0/0? A 40mm Patented June 9, 1936 PATENT ()F F ICE COMBINED RANGE Wilbur Bennett, Gouldsboro, Pa,, assignor "to The Early Foundry Gompany,l)ickson City, Pa.

Application March "7,

5 Claims.

My invention relates to cooking stoves or ranges and more particularly to a'combina-tion coal and gas range. V

In conventional forms of ovens, of the combined coal and gas type, only one source of air supply is used, namely, suihcient air to support or assist combustion. I have found that in order to create and maintain proper circulation, a second source of air supply is required. While, heretofore, attempts have been made to introduce a secondary air supply, the proposed arrangements have not been satisfactory "for the reason that the location of the air intake ports and sub sequentdistribution of the airdid not provide for equalization of air supply. In my improved arrangement, a flue or duct is used to: introduce fresh air under the burner spreader. Air is taken in atboth sides of the oven and the design and construction of the intake flues is such that the air supply is equalized resultant uniform circulation of the heated air throughout the oven.

An object of the invention is to provide a combination range having an improved ventilating system whereby maximum'h'eat'i'ng morality is attained when using either coal or gas as a fuel. Another object of my invention is to provide an oven structure for ranges, wherein the path of travel for the heated air is constructed and arranged to provide increased circulation.

Still another object of my invention is to provide 'an oven structure having an improved arrangement for supplying "fresh air thereto, so that circulation of the heated air causes uniform neating of the oven. 7 s

Yet another objectof my invention is to provide an improved damper control arrangement for combination coal and gas ranges.

A further object of my invention is to provide an improved casing or well for the gasburn'er structure. L

With these and other objects in view, whichmay be incident to my improvements, the invention consists in the parts and combinations to be hereinafter set forth and claimed, with the understanding that the several necessary elements, comprising my invention may be varied in construction, proportions and arrangement, without departing from the spirit and scope of the appended claims.

In order 'to make my invention more clearly understood, I have shownin the accompanying drawings means for carrying the same into practical effect, without limiting the-improvements their useful applications to th'e particular cem- 1934, Serial No. 714,510

struction, which for the purpose of explanation, have been made the subject of illustration.

In the drawings:

Figure 1 is a perspective view showing the interior of the oven.

Figure 2 is a sectional view along line 2-2 of Fig. 1. i

Fig. 3 is a vertical sectional view of the oven showing the burner cover plate in position.

Fig. 4 is a vertical sectional view of the oven with the cover plate removed.

Fig. 5 is a side view of the cover plate and;

Fig. 6 is a perspective view of the cover plate.

Before proceeding with the detailed description of my invention, it may be stated that the oven structure comprises generally, top and bottom walls, side walls and an end wall, the open end or entrance to the oven proper being provided with a door or other closure. The bottom wall is formed with an opening having a burner well or casing mounted therein, the well being open ended and adapted to receive a gas burner. The

1 end opposite the burner, which forms an air intake opening, is provided with a damper whereby the cold air is prevented from entering the burner well when the oven is heated with solid fuel.

The side walls areformed with air intake openings, which communicate with flues "or" ducts formedin the sides of the oven, and are adaptedto supplyse'condary air for the purpose of creating and maintaining proper circulation throughout the oven. The rear wall is also provided with a vent'near' "the top thereof and suitable closure means, operable by the spreader or bafil'e plate, are provided for the openings in the side and end walls. In order to open or close the openingin the burner casing, the burner cover plate is provided with a finger or projection adapted to cooperate with the damperand tilt it about its points of support.

Referring to the drawingsan'd more particularly to Figures 1 and 2, there is shown a range base I uponwhich the oven structure is supported. The ovencomprises a bottom wall 2, side walls 3, rear wall-4 and a front cover plate or casing 5, having a front openinggfi formed therein; the entrance" to the oven proper is adapted to be closed by means of a door I suitably mounted "pon hinges 8.

, Triei'bottom plate 2 is formed with a central opening 9 adapted to receive a burner well or casing l0, and a cut out portion H to accommodate a gas supply pipe l2 attached to a burner l3 whereby the burner structurem'ay be readily removes" 'rr'om tn'e ovenfor cleaning and inspection.

The cut out portion II is covered by means of a cover member l4 arranged to seat in the recess portion and forms with the bottom wall a substantially continuous flat surface.

The side walls 3 are provided with elongated openings [5 which communicate with ducts or flues l6, extending along the exterior of the side walls, the flues opening to the atmosphere through the rear or back wall 4 of the oven. Each flue is provided with a valve member pivotally mounted upon a side wall 3 by means of an arm or extension IS; the side walls are further provided with spreader plate supports or guides l9 and shelf supports 20. The rear wall 4 is formed with an opening 2|, near the top thereof and adapted to be covered by a flap 22 positioned inside the oven and attached to an arm 23 on the exterior of the rear wall. Arm 23 is extended so that portion 24 covers an opening 25 in the rear wall directly below opening 2|, the purpose of this arrangement Will be described more fully hereinafter.

A spreader plate 26, formed with a flame spreading member 21 is slidably mounted upon the guides l9, and the sides and front of the plate, near the edges thereof, are provided with a plurality of rectangular shaped openings 28. At substantially the center of the rear edge 29 of the plate, there is mounted a member 33, projecting beyond the edge and secured thereto by suitable fastening means designated generally by numeral 3|.

Referring to Fig. 3, it will be seen that the burner casing I0 is supported upon a range plate 3| mounted in spaced relation with respect to the oven bottom Wall 2. The plate 3| is provided with an opening 32 for the admission of air to the burner, the edges of the plate forming the peripheryof the opening, being turned back as at 33 to form a seat or rest for the lower end of the burner well. It will be noted that the well is formed with a restricted portion 34, within which there is pivotally mounted a flap valve 35 having arm portions 36, 31 and laterally extending pieces 38, more clearly shown in Figure 2.

For the purpose of providing a suitable mounting for the valve 35, the sides of the restricted portion of the well are formed with grooves 39 adapted to receive the pieces 38. The interior surfaces of the restricted portion are further provided with flanged portions 40--4 I forming a seat for the valve, movement of the valve about its pivotal points being limited by means of stops 42.

The top of the burner well is enlarged as at 43 and formed with a recessed portion 44 adapted to receive a burner cover plate 45, which seats in the recessed portion and forms a substantially flat surface with the oven bottom plate when it is desired to heat the oven with solid fuel. The interior of the top portion of the burner casing is further provided with members 46 adapted to support the burner which is arranged to seat on said members. The burner casing may be formed by casting the two side portions as separate units and then fastening them together by means of bolts insertable in openings 41. In this connection, it will be noted that one of the members, forming the burner well, is provided with an extension 48 (Figure 2) positioned between the bottom wall 2 of the oven and the range bottom plate 3|. Member 48 extends from the burner to the rear wall 4 and serves to partition off the space between the oven bottom and the plate 3| upon which the burner rests.

The burner cover plate 45 is formed with a finger or projection 49 adapted to cooperate with arm 36 of flap valve 35, whereby the valve is tilted about its pivotal points and moved to the closed position when the cover plate is seated in the recess portion of the burner well. As shown in Figure 3, the valve is in the closed position, finger 49 being in contact with portion 36 of the valve, the weight of the cover maintaining the finger against the valve. When the plate is removed, the valve due to gravity, assumes the position shown in the dotted lines, the stops 42 serving to limit the movement of the flap s0 1 that it will be in the operative position to encounter finger 49 when the cover plate is positioned in the burner casing.

It will be noted that the spreader plate guides l9 are continuous from the front of the oven to 2 a point beyond the air intake openings I5, where they are cut away as at 50 to accommodate movement of projections 5| formed on the arms or extensions l8 attached to the shutters or flaps IT. The purpose of this arrangement is to permit 2 projections 5| to move down below the plane of the guides, so that the spreader plate may slide easily over the projections until the plate is flush with the rear oven wall.

Referring to Figure 4, the spreader plate 26 is shown in the operative position within the oven. Openings I5 are then uncovered, flaps I! being in the position shown in the dotted lines. It will be seen that projection 24 extends through opening 25 forcing arm 23 outwardly, thus moving flap 22 away from the interior of the rear wall and uncovering opening 2|.

The burner casing or well is contracted or restricted toward the bottom thereof, for several reasons. By arranging the casing in this fashion, there is not such a large obstruction in the bottom coal flue which would retard or check the easy passage of hot gases when the oven is heated with solid fuel. The design of the burner casing is such that it offers minimum resistance to the passage of heated air or gases through the flues and since the casing is flared outwardly near the top, a larger surface is presented near the top of the flue and adjacent the bottom oven plate; also by this design, the circulating gases are hottest near the bottom plate, thus more heat is transmitted to that part of the oven through convection or radiation. Another feature of the burner well construction is that, by 5 contracting the area of the opening at the bottom of the burner, only sufficient air is admitted to support combustion, with the result that the air which is circulated is initially hotter than it would be if the casing was provided with 6 straight walls.

The operation of the device, so far described, is as follows: Assuming that the oven is to be used with solid fuel, the parts will be in the position shown in Figure 3. Cover plate 45 is seated in 6 recess 44, with the finger 49 resting upon arm portion 36 of flap valve 35, the valve being in the closed position. Openings l5 formed in the side walls are covered by the flaps projections 5| extending through the spaces 50 provided in the spreader plate guides l9. When it is desired to use gas as a fuel, burner plate 45 is lifted out of the burner well, releasing flap 35 so that it assumes the position shown in Figure 4, thus opening the air intake to the casing. Spreader plate 26 is then inserted and moved forwardly on the guides I9; when the plate encounters the projections 5|, flaps I! are moved so that openings l5 are uncovered. Further movement of the spreader plate permits projection 30 to pass through opening 25 in the oven back wall, forcing arm 23 outwardly and moving flap 22 away from opening 2|.

It will be noted that the openings 15 from the fresh air intake ducts I6 are located under the spreader or baflie plate, and that the plate fits closely against the oven back and side walls. Heated air from the burner passes toward the front of the oven, where there is room for free expansion upwardly and through the holes in the spreader plate near the sides and the front edge. With my improved design and arrangement of the spreader plate, together with the proper location of the holes in the plates, a longer path of travel for the heated air is provided, which results in better and more uniform circulation throughout the oven, before the air exits through the vent or opening 2| in the oven back wall.

When the spreader or baffle plate is pushed into the oven, it engages the trips or levers to open the valves in the air intake flues, thus permitting admission of fresh air. This air, which is admitted through openings I5, combines with the heated air in circulation and as the oven is progressively heated from the gas burner, the velocity of the heated air is increased, thereby increasing the flow of fresh air through the intake ducts and automatically creating a mixture of heated air from the burner and fresh air from the exterior of the range by means of which improved circulation is obtained.

Referring to Figures 5 and 6, there is shown detail views of the burner cover plate. The finger or projection 49, adapted to cooperate with valve 35, may be attached to the cover by a screw 52 or other suitable fastening means. The cover is also provided with a lug or projection 53 whereby the plate may be readily placed in or removed from the burner well. It is to be noted that the projection 49 is curved forwardly as at 54, in order that it will be easily insertable into the casing and at the same time encounter portion 36 of the flap valve.

While I have shown and described the preferred embodiment of my invention, I wish it to be understood that I do not confine myself to the precise details of construction herein set forth, by way of illustrations, as it is apparent that many changes and variations may be made therein, by those skilled in the art, without departing from the spirit of the invention, or exceeding the scope of the appended claims.

What is claimed is:

1. An oven for combined coal and gas range comprising the combination of a bottom wall having an open ended burner well mounted therein, a gas burner seated in the upper end of the well and a damper pivotally mounted in the other end of said well, a cover plate for the burner and means formed on the cover plate adapted to coact with the damper whereby the damper is closed when the burner is covered.

2. An oven for a combined coal and gas range comprising the combination of abottom wall having an open ended burner well mounted therein, a gas burner seated in the upper end of the well and a flap valve pivotally mounted in the other end of said well, a cover plate for the burner and means formed on the cover plate comprising a projection adapted to coact with the valve whereby the valve is closed when the burner is covered.

3. An oven for a combined coal and gas range comprising the combination of a bottom wall having an open ended burner well mounted therein, a gas burner seated in the upper end of the well adjacent the bottom wall and a damper pivotally mounted in the other end of said well, a cover plate for the burner, means formed on the cover plate adapted to coact with the damper whereby the damper is closed when the burner is covered, side walls for the oven having air intake openings formed therein, closure means for said openings, a spreader plate slidably mounted on the side walls and means formed with the spreader plate adapted to coact with the closure means for the side wall openings whereby said openings are covered when the spreader plate is removed from the oven.

4. An oven for combined coal and gas range comprising the combination of a bottom wall having an open ended burner well mounted therein, a gas burner seated in the upper end of the well adjacent the bottom wall and a damper pivotally mounted in the other end of said well, a cover plate for the burner, means formed on the cover plate adapted to coact with the damper whereby the damper is closed when the burner is covered, side walls for the oven having air intake openings formed therein, said openings being above the bottom wall and communicating with flues leading to the exterior of the range, closure means for said openings, a spreader plate slidably mounted on the side walls and means formed with the spreader plate adapted to coact with the closure means for the openings in the side walls, whereby said openings are uncovered when the spreader plate is inserted into the oven.

5. An oven for a combined coal and gas range comprising the combination of a bottom wall having an open ended burner well mounted therein, a gas burner seated in the upper end of the well adjacent the bottom wall and a flap valve pivotally mounted in the other end of said well, a cover plate for the burner, means formed on the cover plate comprising a projection adapted to coact with the valve whereby the valve is closed when the burner is covered, side walls for the oven having air intake openings formed therein, said openings being above the bottom wall and communicating with flues leading to the exterior of the range, closure means for said openings comprising flap valves pivotally mounted on the oven side walls, an end wall at the rear of the oven having an opening near the top thereof, closure means for said opening comprising a flap valve, a spreader plate slidably mounted on the side walls and means formed with the spreader plate comprising projections adapted to coact with the flap valves on the side and end walls, whereby the openings in said walls are uncovered when the spreader plate is inserted into the oven.

.. WILBUR BENNETT.

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