US1578938A - Cook-stove-oven construction - Google Patents

Description

March 30 1926. 1,578,938

A. H. TINNERMAN COOK STOVE OVEN CONSTRUCTION Filed August 20, 1923 4 Sheets-Sheet 1v 'JI/IZZZAAZOR March" 30 1926. 1,578,938

, A. H. TINNERMAN COOK STOVE OVEN CONSTRUCTION L/zavfoje r2511- zabz 1mm March 30 1926.

A. H. TINNERMAN COOK STOVE OVEN CONSTRUCTION Filed August 20, 1923 4 Sheets-Sheet 5 March 30 1926.

A. H. TINNERMAN COOK STOVE OVEN CONSTRUCTION Filed August 20, 1923 4 Sheets-Sheet 4 Patented Mar. 30, 11926;

I ALBEBT"H.ZTINNERMAN, or CLEVELAND, 01:10. i

COOK-STOVE-OVEN CONSTRUCTION.

Application filed August 20, 1'923. Serial No. 658,281.

To aZZ whomlit cmwem:

Be it known that I, ALBERT H. Truman MAN, a citizen of the UnitedStates, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in a Cook-Stove- Oven Construction, of which/the following is a full, clear, and exact. description, reference being bad to the accompanying draw This invention relates to stoves of the type heated by hydro-carbon burners and is particularly concerned with an oven and broiler arrangement having walls and fines so constructed as'to producethe most eiiicient burning of the fueland utilization of the heat.

In the construction of cook stove ovens,

it is customary to provide an upright housing, in which is positioned, intermediately, a gas burner below the floor of the baking oven, and in the top of the broiling oven. The broiling oven is provided with a suitable support for a broiler tray which may be positioned different distances below the burner. In the enclosing of the broiler and the oven in a unitary hous ng structure, diffi- 'culty is encountered in providing an efiective air feed for the burnerv flame to accomplish perfect combustion without sacrlficlng heat, and of course, metlicient combustion results in producing ofi'ensive gases, moisture, condensation and the l1ke,wh1ch 1s 1n]urious..

The object of my invention is to provide a simple and effective wall construction for the broiler and baking oven which may be cheaply manufactured and. to arrange in this wall construction a system of air passages and fines to accomplish most effective combustion and utilization of the heat without interfering with the usual necessary pro visions such as named.

Additional objects include the provision of an oven construction affording convenience in the removal of the floor of the oven, convenience of assembling of the parts within the oven, and including of straight flat panels on the exterior of the oven walls. Incidentally, the latter allows covering the exterior with enamel, which is desirable.

Another object of the invention is to prevent the heat of the oven burners from being brought into direct contact with the oven walls at any concentrated point. Another object is to provide a floor construction for the npperoven, whereby even distribution of the heat is accomplished and yet direct heating of any part of the floor by concentratedv application of the flame is prevented and even distribution of heat results.

" Other objects of my invention will be hereinafter set forth in. the following de "scription which refers .to the accompanying drawings illustrating a preferred embodiment thereof. The essential characteristics are summarized in the claims.

In the drawings, Fig. 1 is a cross sectional side elevation taken through the oven structure of a gas stove embodying the features of my invention; Fig. 2' is a front elevational cross section taken through theoven structure; Fig. 3 isra fragmentary perspective view of the top of the oven structure; Fig. 4 is an enlarged fragmentary cross sectional view of the upper front corner construction of the oven; Fig. 5 is a cross sectional plan view taken substantially along the line 55 of Fig. 1 Fig. 6 is a perspective view-of partitioning and flame impinging means for dividing the interior of'the housing into a baking oven and a broiler oven; Fig. 7 is a cross section taken through the partitioning means shown in Fig. 6; Fig. 8 is a bottom plan view of the same.

It is the custom of stove manufacturers,

-'in constructing cook stoves and gas ranges, jto arrange the baking oven above the broller oven whereby a single set of valves and burners may be utilized when using the stove for baking or broiling or when simultaneously using both. This practice commends itself for the reason that the details of stove construction, particularly the oven I construction, -may be greatly simplified and incidentally efi'ects an economy in the manu facture of the stove. are such, however, that it is advantageous to supply a stove having the exteriorly 'exposed members thereof enameled or. properly finished to facilitate cleaning. The fulfilling of this demand by the manufacturer, particularly in the oven construction, introduces many difiiculties includinglthe proper distribution of heat so as to prevent concentration thereof at any particular place which.

would result in discoloring or destroying the enameled finish.

In carrying out the objects of; my invention, I provide an oven construction where all of the exterior members thereof are so formed that they may be enameled over all their exposed surfaces and in addition there- Commercial demands to may be assembled in the stove structure without the resulting exposure of bolt or v clamping means. ThisI accomplish in the n'iannerset forth in my patent application Serial No. 272,715 filed December 11, 1922, ,for Letters Patent on a stove construction.

The effecting of perfect combustion and the even distribution. of heat 'generated thereby, I accomplish in the, manner il- -lustr'ated in Figs. 1 and 2, .wherein I show 'ajbakingand broiler oven combined in'a unitary housing structure. Thefront wall 7 of this structure may comprise an oven door front frame structure is accomplished'in the manner described and claimed in my patent application filed July 31, 1923, Serial No. 654,936 on a stove frame.

- The rear and side walls of the oven structure include a heat insulating air space between the outer enameled panel members and the inner oven lining panels as shown in Fig. 1. The rear walls may comprise an outer enameled panel member 15, and an inner panel member 16,spaccd therefrom to provide an air space 17.. The side walls, as shown in Fig. 2, may comprise an outer panel member and on the open burner side of the stove, outer panel members '21, 22, and inner panel members 23 and 24. These inner panel members are positioned in spaced relation to the panel members 20, 21 and 22 respectively, to provide heat insulating spaces 25 and 26. An outer top panel may be provided with inwardly extending flanges 31 to engagecorresponding flanges on the side panel'members 19, 20 and 21 in the manner described and claimed in my first mentioned co-pending application.

This top panel member 30 bears a spaced relation to an inner top panel member 32,

whereby a substantial flue gas space 33 is provided between the respective top panel members. A flue elbow 34 may be secured to the back panel member 15 adjacent the top thereof and in proper relation to a flue opening 35 formed therein. The outer panel members, as well as the front door frame, may be secured to a rectangular base band 36 which may be formed of bar iron of suflicient thickness to afford a substantially rigid support for the oven structure. This band may be directly mounted upon supporting legs 37. The space 17 between the rear panels 15 and 16 is enclosed at the bottom by a flange portion 16 formed along the bottom edge of the panel 16 and a supporting angle member 36" which may be secured to the inner face of the outer panel member 15 adjacent its lower end or to the band 36.

A removable broiler oven bottom 40 may and the angle member 36 top flue space 33.

wardly extending flange portions at the front and back thereof engaging an extension in the form of an inner shoulder provided on the front door frame member 11 The side edges of the member 40 are spaced apart from the inner side panel members 23 and 24 to provide air passageways in a manner and.

for a purpose to be presently described. Spacer members in the form of angle strips 42 may be secured to the inner panel members with one leg thereof extending in the air spaces 17, 25 and'26 respectively. The side air spaces 25 and 26 are open at the bottom as indicated at 43' and 44 respeetively in Fig. 2, and the spacer angles 42 are therefore extended to obstruct a too free movement of air through the spaces to the Hence, I arrange the spacer angles 42 to extend substantially three fourths of the width of the spaces,

leaving only free passage areas 46 and 47 adjacent the corners of the walls.

The interior of the structure is divided by a partition wall disposed intermediate the baking oven door 12 and the broiler door 13. This wall may be a flame baflle.

as well as a partitioning means dividing the interior of the structure into an upper baking oven 0, and a lower broiler oven B. A hydro-carbon burner 50 may be disposed at the top of the broiler oven compartment with a mixed gas line 51 extending transversely toward the open burner side of the stove, whence amixer 52 may be connected in the gas line of the stove to which the other mixers and burners (not shown) are connected. The burner 50 may thus serve as a boiler burner, as w'ell as a baking oven burner, the heat being generated in the broiler and passing to the baking oven in the form of hot gases, through passageways formed in the side wall structures.

To provide for this passage of heat from the broiler to the oven, I prefer to form the inner side panels 23 and 24 as shown in cross section in Fig. 2, whereby a substantial depression is formed in the panel members which extend from the bottom of the top thereof. I may thus form a passageway from the broiler oven to the baking oven in a very simple manner by securing sheet metal members 60 to the inner panel menr bers so as to span these depressions as shown in Figs. 1 and 2. These sheet metal members" may extend from immediately above the burners 50 toward the top of the oven and form hot gas passageways 63 leading from the top region of the broiler to the baking oven. The hot gases are thus guided through the passageways 63, to the top of the oven formed adj acent' the lower ends of the members 6O afi'ord shelves upon which theoven partioning wall. 67 may be removably positioned.

To prevent the radiation of heat through this partitioning wall, it may comprise, as

shown in detail in Figs. 6 to 8 inclusive, asbestos boards 68, provided with a suitable sheathin or cover 69 forming the top thereof and incidentally the bottomlsurfac'e of the baking oven-portion. For'convenience g1 cleaning, this upper sheet may be coated with a vitreous enamel which is protected from the injurious effects ofthe heat by the insulating boards'68. The lower side of this partitioning wall preferably comprises 'a flame deflecting member 70 which is suitably formed toprovide a space 71 between the flame impinging portion thereof and the asbestos portion 68. This member may accordingly comprise a pressed metal sheetv 28 having a depressed central portion provided.

withsflanges 70 around the'ends-thereof affording contact with the asbestos board.

' As shown in Fig. 7 suitable perforations 7 3 may be formed in the bottom'member 7Q to permit the circulation of the hot gases between the asbestos board and the flame baflle member.

The members comprising this heat baflie wall may be secured together in any convenient manner such as by. the use of stovebolts 72.

In order to obtain a proper combustion of the gas escaping from the burner, it is essential that a continuoussupply .of air be accessible to the burner. It has heretofore been the practice to either perforate the bottom panel member 40, or its equivalent in other structures, to permit this ingress of fresh air or to form unsightly openings or perforations in the panel of the broiler door. Both of these practices are objectionablefor the reason that when the bottom of the broiler is perforated, the escape of grease from the oven is permitted, while forming openings in the. door does 'not give proper distribution of fresh air to the burner, par ticularly when the burners are properly disposed in the transverse position illustrated. I I effect a complete combustion of the gases by providing passageways which maybe incorporated in the side wall construction of the broiler oven ina very economical manner. I find it convenient to utilize the structural provisions made in the side panels 23 and 24; for theformation of the passageways 63, in forming the broiler passageways whereby they may extend from -beneath the oven structure into the broiler oven. Thus by the use of broiler tray supporting members 75 which may be secured to the side panels 23 and 24 in the same manneras the members 60, I may formthe passageways 76. The members 75 however, are provided with large openings 78 adjacent the lower ends thereof to permit a copious ingress of air to the burners. U-shaped baffle members 80 ma 7 be positioned in the depressions forme in the side panels 23 and 24 to completely obstruct any direct passage of airfrom the passageways 76 to the passageways 63. Since the passageway 76 extends transversely relative to the burners 50, it

will be readily seen that a uniform distribution of incoming air 'will be available at the burner flames under all conditions, as

indicated by the arrows.

The U- haped baffle members 80 may also be utilized as part of the securing means for maintaining the ribbed members 75 in position. The legs thereof may, therefore, be

extended to be embraced by some of the rib portions of the members 7 5; These ribs, of

course, serve as broiler tray supports and may be formed on the members 75 at different elevations whereby slow or fast or intermediate broiling periods may be obtained regardless of the regulation of the burner flame.

To permit the escape of theburned gases from the baking oven, I provide apertures in the inner top panel 32 which are formed therein adjacent the front of the oven structure and I provide a Z-shaped baflie plate 86, in the top'space 33, to preventthe impinging of the hot gases upon' the outer enameled panel 30. This baffle also serves to direct the gases toward the flue 87 A second baflle comprising a flanged plate 88 is disposed in front of an opening 89 formed in an upwardly extending flange 90 comprising one end of the inner top panel 32, the flange 90 serving to partition the top space 33'from the back space 17. A similar flange 91, is formed on the front end of the top panel member, and serves to prevent the impinging of the hot gases against the top portion of the enameled I front door frame 10. It will thus'be seen that a complete cycle of gas movements in-, clude the mixing of gas and air at the mixer 52 and passage therefrom through the tube 51 to the burners 50, and the ingress of air to the burners through passageways 7 6 formed at each side wall of the oven, through the lar e openings 78 to the burner flames, fromw once there is a deflection of the hot gases by the plate 70 causing a downward and sideward circulation thereof. This cycle is completed by the escape of this hot burned gas upwardly through the passageways 63 toward the to of the oven from whence they are deflecte downwardly toward the baking trays of the oven. A partial escape of these hot gases through the openings 85 to the top space 33, takes place and they then traverse this space to the flue opening 35'formedin the outer back panel K and escape therethrough into elbow 34 and chimney flue 87, From the foregoing .description of my 1nvention, it is to be readily seen that Ifelimi nate thefidisadvantages of a unitary oven housing construction whereinthe broiler and baking oven aredependent for heat upon a single set of burnersv disposed in the.

broiler, in that I provide a very simple wall construction which ncorporates thereinmair passageways establishing communicatlon from outside of the stove to the interior of the broiler which permits the ingress of passage or hot gases only as directair passage from the exterior of the stove 1 0 the upper oven is prevented by reason lot the disposition of the baflles in the passageways intermediate the top and bottom oif'fthe broiler. Thus the bakingoven wallsilrave only hot gases contactingtherewith in the p ward y a considerable distance to prolong the transference of heat thereto, This con;

struction it will be seen furthers the obtaining of proper combimion conditions as only the desired amount of air will be drawn to the burners. I

Furthermore, it will be seenv that I provide'a very simple removable partitioning wall which defines the baking oven and broiler oven and which is constructed in such manner that the top surface thereof may comprise the bottom or floor of, the

baking oven and may be enameled thereby baking oven.

assageways which are. extended lips.

harassepermitting ready cleaning thereof; This r construction, it may 'be seen, is such that the enamel will not be destro ed despite the. impinging of thefburner ames uponthe under or broiler side thereof. This partition also serves to direct the'hot gases to passageways leading from thebroiler to the Itwill also be seen that I incorporate the above enumerated advan tageous' feature of hot gas circulation in a stove construction 1n such manner aspto permit'jthe enamellng' of all the outer expreventing destru'ctionior damaging of this finish bythe elimination of'all heat consentrat-ions at any particular point. Having thus described my. invention, 1

, A cooking range construction comprising a double wall baking and broiler'oven cone 7 a struction formed by inner and outer vertically disposed panel members spaced from each'other and open at the top andv bottomto form air passages, two of said inner panel members being oppositely disposed and having vertically extending depressions therein forming passageways establishing communication between the exterior of fithe'structure and the boiler oven and between the boiler oven and "baking oven, a spacing member bafiles disposed between the inner and outer panel members, obstructing the too free passage of air from the bottomv to the top of the structure, an inner top oven panel member extending overthe depressed ends of said inner side membersand terminating short of the outer side panels whereby free passageways for cool air are aliorded at the corners of the oven structure.

In testimony whereof, Ihereunto afiix my signature. I

ALBERT H. TINNERMAN.

posed members of the oven structure, while 7

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