US2007446A - Closed top stove - Google Patents

Description

gamma July 9, 1935. P. HOLLMAN CLOSED TOP STOVE 2 Sheets-Sheet 1 Filed April 20, 1931 July 9, 1935. P. I. HOLLMAN 2,007,446

CLOSED TOP STOVE Filed April 20, 1931 2 Sheets-Sheefi 2 Patented July 9, 1935 Tomes STAT v oLosEn 'rorsrovn Peter li llollmain, Rockford, 111., assignor. to Geo. V D Roper Corporation, Rockford, Ill-l 1 ration of Illinois Application April 20,1931, Serial- No; 531.281 .11 claims. (ones-39),

invention relates to ranges and more particularly. closed topstove's, and has; special ref:

erence to concealment of the f'manifold on stoves" of that type.

The principal (lbJtXZ t of my invention is to pro vide a stove of the kind mentioned with a housing for: the concealment of the manifold. and cooks, so constructed with arena and outlet openings below and above the. cocks and manifold to insure good circulation of air .through'the housing to keep these partsfrom getting too hot, whereby and insureeasy operation thereof at all times.

Another object consists in' the provision of 'a baffle within the housing to promote air circulation therethrough, the said baflle being further so constructed as todeflect heat of the burners awayfroin the cocks and manifold and more or less completely insulate the combustion chamber from the aforesaid housing. J Still another object is. to provide a heat deflector for the cross' pipe that delivers to they manifold, tominirnize the heating of said. pipe; said deflector being suitablyformed of sheet metal and arranged to be placed over the side of-the cross pipe against thefburn'er boxendhwall to enclose the same isolated from the combustion chamber. V 7

Other objects of the invention willappear in the course of the following detailed description, in; which reference is madeto the. accompanying drawings,whereinf H ,j

Figure 1 is a front view of the cooking top portion of a gas range embodying my invention;

7 Big. 2 is a longitudinal vertical section of Fig ure 1; v Fig.3 is an ofFig.2,and Fig. 4 is a sectional detail on thegline 4- 4 of The, same reference numerals are applied to corresponding parts throughout the views." The invention is herein illustrated anddescribed as embodied in aclosed top stove. Stoves of that type present a much-more'difiicult'problern in the concealment of the manifold than open top stovesbecausethe concealment of the mam;- fold means confinement in the heatof the burners. to the-cocks by conduction and causes the drying out of the lubricant therein so that the cooks either stick or turn with great difficulty. 1 While the inventionis particularlyadapted for use with closed top stoves because of thefefiicient way it affords of cooling the ma i endmks m h enlargement of the front portion The heat is transmitted from the manifold concealed,]it should beunderstood that the invention islapplicable to opentop stoves as well.

Thejclosed top "stove illustrated is generallysimilar to that disclosed in thecopending application of Stanleyl-LI-Iobson, Serial 15105193276, 5

filed May 21, .1927, which has matured into Pat. No. 1,878,143, Sept. 20, 1932. The cooking top, indicated" generallyby the reference numeral 5, has the usual oven section 6 atone side thereof andfa back splasher wall I behind the same. 8 10 v indiiiates the burner jbox back, and 9 the burner to prevent drying out of lubricant in the cooks boxf'end Walls, drawer l0, commonly referred to as auutili'ty drawer; jis "slidably mounted in the burner; boxj undera suitable drip pan H. The

cooking top; as. stated before, is of the closed type 7 and has'top plates [l2 set in the openings therein so as to present asmooth flat top surface on which .tof'place. the cooking utensils, and these top plates in turdhave openingsfclosed by removable lids, the number'of openings depending upon the numher of burners'employed. One of the'front cookin'g top hurn'ersis indicated at l3, and. one of the fear buiinersat l4, itv being customary to provide two in a frontjset and two inja rear set, as is wellknown, The manifolds for the rear burners I may be of any ordinary conventional form, but the manifoldstfi for the front burners l3 are elongated to the desired length and given a reverse bend,'as indicated at H, to communicate with the burners I3 from the rear, thus allowing .the desired length of travel of the gas and air for good. 'mixture despite the close proximity of the burners 3. with the gas supply manifold ll due to thelocation ,of the latter beneath and within the cooking top for concealment. The gas supply manifold in .th'eI-Iobson application above referred to was not concealed, but disposed out in front, of the cooking top, and that accounts for the. .factj'that in that case it was possible to use .front'burners of ordinarystandard form. A bot- 40 tom plate. 18 iisf nounted under the cooking top 5 between the top plate I? and the burners, and thus provides a confined combustion chamber I9 abovethe' same anda secondary air chamber 20 below the same above the drippan I l. The bottom plate serves as a support for the burners in ,the'manner shown. Thebottom plate, in accordance with the Hpobson application, has secondary air openings 2! conforming to the arrangement of the flame ports of the burners and defined .by upstanding 7 flanges 22. The combustion chamber [9, communicates at the rear of the cooking top with a flueoutlet 23 for conducting the products of] combustion from the stove. So much for a general. understanding of the construction of 5 through the opening 3|.

' its lower end on the base band and provides a support at its upper end for the cooking top. The said burner box front 24 is provided with an open ing 25 in the lower portion thereof for the reception of the drawer 0 beneath a cross-bar 21 which is cast as an integral part of the front. The upper portion of the burner box front is cast to provide a horizontal outwardly projecting housing 28. The housing 28 is formed by a-substan tially vertical front wall 29 and a downwardly inclined forwardly projecting top wall 30. "The bottom of the housing is open as appears at 3| all the way from the lower edge of the front wall 28 to the top of the crossbar 21. Now, lugs 32 are suitably cast integral with the inside of the front wall 29 formed at their'inner ends for reception of the manifold I1, and clips 3.3, fastened as by means of screws 34 to other lugs35 cast integral with the inside of the front wall 29 below the lugs 32, serve to clamp the manifold H in place. The manifold when so clamped is disposed substantially centrally in the housing 28 at thelevel of approximately the middle of the front wall 29, above the opening 3| and below another opening 35' which reaches horizontally across the upper portion of thefront wall 29 substantially the full length of the housing. The bottom of the opening 35 is defined by an inwardly projecting curved flange 37, the purpose of which is mainly to give a'pleasing appearance, but which serves to better a; conceal the manifold from view through the i0 4 opening 36. The top of the opening doesnotrequire a similar provision, but shoulders 38 are provided above the opening for a purposewhich will soon appear, as a result of the extensionlupwardly of the flange 31 at the opposite ends of the opening 36, as appears at 39.

Specially designed cocks 40 have upwardly projecting threaded shanks 4| threading into holes provided in the bottom of the manifold I! so as to depend from the manifold and provide for a proper. elevation of the rearwardly projecting discharge nipples 42 with respect to the shutters 43, of the burner manifolds. The cocks 40 have forwardlyprojec'ting stems 44 terminating just behind the front wall 29 of the housing 28 but approximately centrally disposed with respect toopenings 45 provided in the lower portion of said wall, preferrably as notches inthe'lower edge thereof. Handies 45 have their shanks 4| detachably secured to the stems 44 of the cocks 40 as by means of set screws 48, the said shanks being entered freely through the openings 45 for. operation of the cooks by means of the handles from outside the housing 28. Removal of the handles 46 from the stems 44 permits turning of the cooks for threading or unthreading the same on the manifold, and, of course. the cooks are. easily accessible A removable, grid may if desired be provided for the opening 3|.

In operation, itwill be seen that when the cook 40 for any burner is opened by turning the handle 46 thereof, primary air is drawn in through the opening 3| in the burner box front 24 for delivery with the gas through the shutter 43 to the burner, and other air to support combustion, referred to usually as secondary air, is

also drawn in through the opening 3| into the secondary air chamber 25 as a result of the draft created in the operation of the burner. A plurality of holes 5| are provided in the end wall 9 adjacent the bottom plate |8 to admit as much more secondary air as may be required for good combustion. The cocks 40 are practically in the direct path of travel of the air entering through the opening 3|, and this naturally keeps the same fairly cool, but the crosspipe 52, that supplies gas to the manifold I1, is found to cause heating of the manifold I! by conduction to such an extent that if no provision were made 'forcooling of the'manifold, the cocks would be subjected to undesirable heating by conduction from the manifold. It is for that reason that I=have provided the upper opening 35 preferably just above and fairly close to the manifold H. A certain amount of air entering the housing 28 through the lower opening 3| is thereby allowed to, flow upwardly past the cooks 48 and around the manifold and out through the upper opening 36, whereby to cool the entire assembly to such an extent that the cocks are not heated enough to have the lubricant therein dried out. There is, therefore, no occasion for the cocks to stick or turn with difficulty. A' baffle 53, the details of which are hereinafter described, serves to increase the circulation of air upwardly around the manifold and out through the opening 36 tokeep the manifold as cool as possible.

' The crosspipe 52 is disposed inside the end wall 9 of the burner box and has the rear end thereof threaded, as appears at 54 in Fig. 2, for connection with the gas main, and its front end is'preferably cut on a miter like the end of the manifold l1 and welded thereto. Owing to its proximity with the burners, the pipe 52 would be heated to an objectionable degree if it were not for the provision of the deflector 55 made of sheet metal bent to substantially channel form in cross-section, as appears in Fig. 4, and fitting over the pipe 52 from the'side and placed in abutment with the inside of the wall 8 for complete enclosure of the pipe. The deflector 55 is fastened in place in any suitable manner at the rear end thereof as by means of alug 56 projecting upwardly therefrom andfastened to the back wan a as by means of a bolt 51.

The deflector 55 is held in place at its front end by means of the baffle 53, as will now appear. The baffle 53 is formed from a single piece of sheet metal reaching the full length of the housing '28 and bent to a substantially V-shaped cross-section to provide a front wall 58 and a rear wall 59 defining an air pocket 60 therebetween for insulation of the housing 28 from the combustion chamber. The one end of the baffle 53 is notched out at the crotch portion of the V, as appears at El in Fig. 4, so as to fit over the deflector 55 and hold the same in abutment with the end wall 9. The deflector 55 has the top wall thereof resting on top of the crosspipe '52 for support of the deflector, and it will be evi- :dent'that since the battle 53 fits over the deflector '55fas just; described, the crosspipe 52 also provides some support for the baffle. The baffle is disposed with the front wall 58 inclined upwardly reaching from'a point considerably to the rear and below the manifold IT to a point above and infront of the manifold, the wall 58 finding support at its front end on the shoulder 38 previously mentioned. The rear wall 53 of the baffle extendsupwardly on a shaper incline and just clears'the front end of the bottom plate l8, and

i s' then bent asat 62 to rea h forwardly r ianchorage'between the upper edge of the front of'the cooking top, and it will also appear how lugs; 65 formed-on the inside of the front 24 are arranged to support the'front end of the wall 59 from beneath. In operation, the'deflector 55 minimizes the heating of "the crosspipe 52 so that there is much less heating of the manifold ll' iby conduction. Although the manifold I1 is in fairly close proximity with the front burnersll3, there is little chance'for direct heating of the manifold in the operation of the burners, because of the way in which the baflle'53 insulates the housing 28 from the combustion chamber. The rear wall 59 of the baffle 53 deflects the heat of theburners, and the intervening' air pocket 68 minimizes the transfer of heat from the wall 59 to the wall 58 byradiation. the-wall 5S derives fromthe wall 59 by conduc tion clination of thefront' wall 58 of the baflle 53 upwardly toward the opening over the manifold ll increases; the circulation of air upwardly through the housing '28 around the manifold l1 and out through the opening 36. There is a quite perceptible chimney or stack effect as a result of air heated, by contact with thecocks Ml and manifold if tending to rise in the housing 28 and escape through the opening 36, and it 13 this action plus the deflection of the baflle 53 that accounts for the good circulation of air through the housing 28; v

It'is believed the foregoing description conveys a good understanding of all of the objects and advantages of my invention. The appended claims have been drawn with a view to covering all legitimate modifications and adaptations.

I claim: i

l. A gas stove comprising a cooking top, a burner therefor, and a front wall for a manifold housing below the cooking top having a handle opening therein, and an air inlet opening below and an outlet opening above the handle opening, a manifold beneath the cooking top and disposed between the air inlet and outlet openings, a cross- I pipe reaching rearwardly fromone end of the manifold for supplying gas to the latter, the crosspipe extending in proximity with the burner, a heat deflector enclosing said crosspipe to minimize transfer of heat from the burner to the pipe, a baffle substantially parallel with the manifold and disposed between it and the burner to prevent heat transfer from the burner to the manifold, a cock'communicating with the manifold and arranged to discharge gas to the burner, and a handle disposed outside the housing having an operating connection through the handle opening with the cock for opening and closing the same.

2. A gas stove as set forth in claim 1 wherein the baffle is'so conformed and related to the air inlet and outlet openings whereby to direct incoming air toward the outlet opening for circulation about the manifold, said baffle serving to isolate'the burners from the manifold to such an extent as to cut down the flow of secondary air thereto from the air inlet opening, the stove being provided with auxiliary air inlet openings Such heat as is pretty well dissipated by the air that fcomes in contact therewith which enters the opening "35 and circulates through the housing behind the baffle for delivery of additional secondary air to the burners. I

73. A gas stove as set forth in claim 1 wherein the heat deflectorrfor the crosspipe rests on the top of said pipe, and wherein the baflle has theon'e end thereof formed -to fit over] said deflector whereby the baffle holds the heat deflector in place on the crosspipe and the crosspipe is used to support the'baflie. T i

4. A gas stove as set forth in claim 1 wherein the baffle is formed from sheet metal bent tear;-

proximately V-shaped cross-section whereby to providediverging forwardly reaching front and rear walls having an air insulating chamber therebetween, the rear wall being inclined in a predetermined relation to the burner: for deflection of heat therefrom, and the front wall being conformed and inclined-with relation to the manifold and air inlet' andv outlet openings-to direct incoming air toward the outlet opening for circulation about the'manifold. r f

5. A gas stove as set forth in claim 1 wherein the bafile is formed from sheet metal bent to approximately v -shaped' cross-section whereby to provide diverging forwardly reaching front and 'rear walls having an air. insulating chamber therebetween, the rear wall being inclined in a predetermined relation to the burner for de: fiection of heat therefrom, and the front wall being conformed and inclined with relation to the manifold and air inlet and outlet openings to ,di- I rect incoming air toward the outletope'ningfor circulation about the manifold, and wherein the heat deflector rests on top of the crosspipe, and the adjacent end of the baffle is formed to fit over said deflector whereby to hold the deflector in place on the crosspipe and at the same time support the baifle on said pipe;

6. A gas stove comprising a cooking top, a front wall for a manifoldhousing immediately below the cooking top, the cooking top having a downwardly projecting front flange resting on a shoulder on theupper edge of the front wall, the front wall having a handle opening, the upper portion of said housing having an air outlet opening therein, and the lower portion of said housing having an air inlet opening, a burner for the cooking top, a gas supply manifold in said housing in'a predetermined relation to the air outlet cpening, a cool: for delivering'ga's from the manifold to the burner having an operating stem reaching toward the handle opening, a handle outside the housing having an operating connecto-n through said opening with said stem, and a bafiie disposed substantially parallel with the manifold between the latter and the burner to fold, and the rear wall be ng inclined upwardly adjacent the. burner for deflecting heat therefrom, the front -end of vall being entered in the joint between the cooking top and front wall for support of the bailie.

'7. A gas stove including in combination, a combustion chamber. heating burners arranged therein, and a closure plate constituting the front wall of said chamber, said plate being formed with ports in its lower part through which ports air for combustion is entrained, and said plate er compartment, burners therein, a front wall being formed also with ports in its upper part through which excess air is vented.

.8. In a gas stove having a cooking top burner compartment, burners therein, a front wall for said compartment and a gas supply manifold and cocks communicating therewith for delivery of gas to the burners, said manifold and cocks being disposed in said compartment behind the front wall, said wall being formed with lower and upper openings for inlet and. outlet of air respectively, whereby to supply air for combustion to the burners and surplus air for circulation past the manifold and cocks for cooling the same.

9. In a gas stove having a cooking top burner compartment, burners therein, a front wall for said compartment and a gas supply manifold and cooks communicating therewith for delivery of gas to the burners, said manifold and cooks being disposed in said compartment behind the front wall, said wall being formed with lower and upper openings for inlet and outlet of air respectively, whereby to supply air for combustion to the burners and surplus air for circulation past the manifold and cooks for cooling the same, the stove including baiile means disposed in the burner compartment between the burners and the manifold and cooks to shield the latter from the heat of the burners, said bafiie means being so disposed whereby excess air taken in is directed toward the upper outlet.

10. In a gas stove having a cooking top burnfor said compartment and a gas supply manifold and cooks communicating therewith for delivery of gas to the burners, said manifold and cocks being disposed in said compartment behind the front well, said wall being formed with lower and upper openings for inlet and outlet of air respectively, whereby to supply air for combustion to the burners and surplus air for circulation past the manifold and cocks for cooling the same, the stove including a batile of V-shaped cross-section with the crotch portion of the V lowermost, ar ranged between the burners and the manifold and cocks so that the inner wall deflects heat of the burners away from the manifold and cooks, and the outer wall deflects excess air toward the upper outlet, the inner and outer walls being spaced so as to minimize heat transfer from the former to the latter.

11. In a gas stove comprising a cooking top, a gas supply manifold therebeneath, gas cocks communicating therewith for delivery of gas to burners disposed beneath the cooking top, and a baille of V-shaped cross-section disposed with the crotch of the v lowermost between the burners and the manifold so that the inner wall deflects heat of the burners away from the manifold, and the outer wall is disposed adjacent the manifold and spaced from the inner Wall for minimum heat transfer from the inner wall to the outer wall.

PETER I. HOLLMAN.

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