US1527217A - Gas range - Google Patents

Description

Feb. 24, 1925. 1,527,217

R. L. POE

GAS RANGE Filed June 8, 1922 4 Sheets-Sheet l` Feb. 24, 1925. 1 2

l R. L. POE 5 "7,217

GAS RANGE Filed June 8, 1,922 4 Sheets-Sheet 2 Feb. 24, 1925.

R. L. PoE

'GAS RANGE Filed June 8, 1922 4 Sheets-Sheet 3 r/P?? 22'07: oer/z Pag RM 6 www@ J j "9' Feb. y24, 1925.

, 1,527,217 R. L. POE GAS RANGE Fildqune 8, 1922 ,4 sheets-'sheet 4 3, 3 in considering each unit separately. The walls 19, 19 are spaced apart a distance substantially twice the distance between the outer end walls 3, 3 and partin tion walls 12, 12, but are treated in a like manner, namely, by providing a transverse diving plate 2O at the same distance below the top as the plates 16, 16, and filling the space below with insulating material 21. Above the plate a duct 22 is formed extending from front to rear.

Within the spaces surrounded by the bottom Wall 15, inner end walls 12 and 19, and the top plates 5, 5, are erected. the ovens, consisting of the following parts: Spaced above the insulated bottom wall 15 is an inner wall 23 extending from the front Wall 1 to the point short of the innei' rear wall 13 (Fig. 2) where it joints a Vertical wall 2st4 which in turn stops short of the top plates 5. These walls form the bottom and back walls of the oven, with free air passages or ducts 25 and 26 separating said walls from those which extend parallel thei'eto and forni the surrounding shell. These ducts 25 and 26 form parts of the air circulating system hereinafter to be described more in detail. From the upper edge of the rear oven wall 24 and extending forwardly to the front wall 'of the range is the oven top wall 27 inclined downwardly from rear to front at an angle of, say, fifteen (15) degrees to the horizontal, and thereby forming a tapered or mnverging chamber or passage 28 just below the top plates, and which gradually decreases in height from the front to the rear of the oven space. (which may also be'termed the combustion zone) as well as the rear vertical duct 26 and bottom Vduct 25, extend the full width of the interior spaces of the range and surround three sides of the oven in the form of a continuous passage or duct. In the rear wall of the oven is a rectangular opening 29, closed by a damper 30, the latter being opened and closed by means of an eiidwise' adjustable rod 31, extending along ends of the range from front to rear and connected with an aiin 32 mounted on the end of a shaft 33 on which the damper is mounted (Figs. 1, 2 and 3).

Going back to the vertical duct 14 and horizontal ducts 18 and 22 (the former being formed between the outer and inner rear walls 2 and 13 of the range and the latter between the outer and inner end walls 3, 12, and 19, 19), the further disposition and relation of these ducts will now be described, together with the burner construction, and finally the manner of disposing of the products of combustion and excess heat through the smoke pipe 9.

'Referring to Figs. 2 and d, and following the arrows, itwill be seen that the air is This passage 28v drawn into the vertical duct 14 along its open lower edge, passing upwardly. The upper end of the duct communicates with the horizontal ducts 18 and 22 so that the volume of air is divided, passing forwardly along the sides of the oven space within said chiots. Extending the width of the oven space and transversely of the combustion zone at its extreme forward portion is a housing 3l of sheet metal which forms with the front wall 1 and oven top wall 27, a substantially rectangular cross duct 35 (Fig. 2). This duct is open at its ends and communicates with the forward ends of the fore and aft ducts l8'and 22. rlhus the air enters the cross duct from each end, as clearly shown by arrows in Fig. 1. l/V'ithin the cross duct are mounted the burners 36, preferably three in number, and arranged in spaced relation through the length of said duct. These burners are mounted in horizontal position in the front wall 1, being connected with a gas supply pipe 37 through branch pipes 38, projecting through said front wall, there being provided in each branch pipe a shut-oli' valve 39 and an air .mixing valve a0. The gas valve 39 and air valve 40 are located beneath the gas pipe 37 and the projecting edge of the top-plate 6. These parts are thus protected from injury by contact with articles being placed upon or removed fi'om the range, and the air valve, being under the projecting edge of the top plate is protected from being clogged by grease and other substances.

The burners have preferably the form of flattened nozzles arranged horizontally, with a slight upward inclination at their tips. The ends of said burners register withports 4:1 in the housing, said ports being cut in a beveled wall` portion 34a in the rearwardly SO i facing wall of the housing 34. As clearly indicated in Fig. V2, the llame issuing from the burner is directed against the top plates 5, 5 at an obtuse angle and carried rearwardly toward the back end of the combus` tion zone, the gradual contraction of the latter serving to maintain the flames 1n conf tact with the hot plates throughout their entire area. The flames, however, are not confined to the combustion zone but are carried downwardly into the vertical duct 26 behind the oven. The path of the products of conibustion beyond the last mentionedduct 26 will be understood from the following: Referring to Figs. 2- and 3, it will be observedv that a vertical baille plate 42 is mounted within the horizontal' duct 25 underneath the` oven, and extending from the rear wall 13 forwardly to a point substantially twothirds the depth of the range. i Moreover, it is positioned parallel' to and at about one-` third the width of the duct from the inner end partition wall 19, thus dividing said duct-intotwo portions,namely, a wide por-y tionconnected with the down duct 26, at the rear of the oven, and a narrowerportion connecting with the side portion at the front end of the battle plate, 42, and opening at its rear end to a iiue i8 through anopening 44 (Fig. 3) in the rear wall of the oven. The flue-13 consists of avertical sheet metal duct riveted to therear wall of the oven, having a flaring base, which includes the [lue openings dal, 44; of each unit. The upper endv of the flue communicates with the smoke pipe 9 through an adapter 46 (Fig. 2) forming a part of the top marginal plate 6.

From the foregoing description it will be seen that air at the room temperature is drawn into the outer rear duct 13, thence forwardly to the ends-of the crossduct 35, along. the horizontal duits 18 and4 20 on eitheil side of theoven. The air in traveling through these ducts comes into contact with the inner partition walls which are heated ,to a high ten'iperature by the flame which is conductedthrough the passages on the other side. In this manner the incoming air is preheated to avery high temperature` thereby promoting etlicient combustion at the burners and economy in gas. consumption in that the excess heat is utilized for preheating the air. Furthermore, the incoming air ducts serve as insulating spaces, the` air absorbing the heat for auseful purpose,qwhich otherwise would be radiated from the range walls as 'waste heat, increasing the temperature-of the kitchen to the discomfort of the cooks.

The Haine from the burners, as already suggested, travels rearwardly the length of the combustion zone 2S and fills the entire width thereof. Due to the convergence of said zone, the flame is directed into contact with the hot plates, maintaining them at a uniformly high temperature throughout the entire depth and width of the effective cool;- ing area. Thus uneven temperatures and the presence of areas of reduced temperatures are eliminated, so that all of the range top may be available for use with equal effectiveness.

Passing from the combustion zone, the flame enters and passes downwardly into the vertical duct 26 at the rear of the oven, the hot gases entering the duct 25 directly beneath the oven travelingfirst forwardly, and thence rearwardly, as they circulate around the end of the baille 42% before escaping to the flue 43. Manifestly, the flame and hot gases envelop the oven on top, rear and bottom, thus maintaining the temperature. therein at a uniform high teniperature necessary for baking and broiling. The carrying of the flames beyond the combustion zone into the rear duct 26 has an added purpose, namely, to maintain the inner rear wall 13 at a high temperature, thus promoting the preheating of the incoming air as it passes upwardly through the duct lfl.

From the foregoingl discussion vitiwill :be observed that a single set of burners are employed for heating the top plates 5 as .well as the oven, the latter being heated by circulating the flame and hot gases around` ther three sides of the oven before they are discharged to the fine. Economy of gas `con,- sumption is manifestly a direct result of this arrangement inasmuch as separate oven burners are not required,

It is manifest that the structure embodying the invention may be variously modified without departing from the spirit of the invention and therefore l do not wish to be limited to the specific form shown or described except in so far as it is defined in the appended claims.

l claim as my inventionl. in a gas range, the combination of an ovenTA a duct extending around said oven and having flue outlet at one end, and a sep-arate duct extending transversely of said first Ab omentioned duct at the other rend` thereof,v

burners located in said cross duct and registering with openings therein, and air supply ducts leading from air inlet openings remote fromsaid cross duct `andalong said rst mentioned duct and communicating with the ends of said cross duct.

ln a gas range, the combination of an oven, a duc-t extending around said oven and having a flue opening-beneath the oven, a cross duct extending transversely at the end of said duct above the oven Iand having openings therein directed longitudinally of said surrounding duct, burners spaced apart within said cross duct and registering with openings therein, and an air duct located exterior to said first mentioned duct, and extending upwardly at the rear and along the sides of the oven, and communicating with the ends of said cross duct.

3. In a gas range, the combination of an oven, a duct extending along the top, down the back, and beneath the oven, and having a flue outlet at its lower end, the portion of the duct above said oven converging fromV front to rear, burners arranged transversely of said duct above the forward end of said oven, a. housing enclosing said burners and provided with openings registering with the nozzles of said burners, and an air duct eX- tending up the back and forwardly along said duct exterior thereto and communicating` with one end of said housing.

Ll. In a gas range, the combination with top pla-tes of an oven having a top wall sloping from front to rear and forming a converging combustion zone, a ductl extending from the rear end of said combustion zone, down the back, and beneath the oven, and having a flue outlet at its lower end, burners arranged transversely of said combusllO tion rone at the forward end thereof, a h0us ing enclosing said burners and provided With openings registering with said burners, and an air duct extending exterior to said first mentioned duct upwardly and forwardly along the sides of the combustion Zone and communicating' with the ends ot said housing.

5. ln a gas range, the combination of outer walls including top plates, an oven shell mounted within said outer; walls, the top wall ot said oven shell being inclined upwardly from iii-ont to rear and forming a combustion Zone, a duct extending from the rear end of said combustion zone around the rear and bottom walls ot said oven shell and entering a` tlueat the rear, an outer vertical duct at the reall ot said first mentioned duct open along its lower end, and extending vertically, lateral du. :ts extending Jforwardly from the upper end of said outer vertical duct along the sides ot said combustion Zone, a cross duct at the forward end ot' said combustion zone and connected at its ends with said lateral ducts, and burners mounted in said cross duct and direi-ted rearwardly through openings therein.

G. In a gas range, the combination ot top plates, an oven shell having an inclined top wall spaced below said top plates and forming a combustion Zone conif'erging from front to rear, a duct extending from the rea-r of the combustion Zone, down. the hack, and :heneath said oven shell, and having a flue opening, a cross duct at the front end ot' said combustion zone, burners mounted along the front portion of said combustion zone and directed longitudinally thereof, a transverse housing enc-losing said burners and provided with openings registering therewith, and a. vertical air duct open along its lower edge and lying exterior to said first mentioned duct, and lateral ducts extending forwardly on either side of the comustion zone and connecting said vertical air duct with the ends of said housing.

7. In a gas range, the combination of out-.

er walls including top plates, an oven shell mounted within said outer walls, the top wall ot said oven shell heilig inclined upwardly from front to rear, a. vertical partition wall `between the outer rear wall and the rear wall of the oven shell and forming vert-ical ducts, the outer duet heilig open along its bottom and the inner duct connected with the space between said top plates and the inclined top Wall of the oven shell, lateral ducts extending forwardly from the upper end ot said outer vertical duet, a cross duct at the forward end of said space above the oven shell and connected at its ends with said lateral ducts, burners mounted in said cross duct and directed rear'- wardly and upwardly through openings therein, and a iue opening connected with said inner vertical duct.

In witness whereof, I hereunto subscribe my naine this 3rd day ot June, A. D., 1922.

ROBERT L. POE.

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