US2847988A - Radiant heat fuel burner - Google Patents

Description

Aug. 19, 1958 F. ,0. Hess I RADIANT HEAT FUEL BURNER Filed Aug. 24, 1954 2 Sheets-Sheet 1 N@ mw mm NJIQN Sv J uymvrozz: Hedel@ 0. Hess,

Pmi q? PM 'A ATTORNEYS.

F. O. HESS RADIANT HEAT FUEL BURNER Aug. 19, 1958 2 Sheets-Sheet 2 Filed Aug.A 24, 1954 -v JNVENToR.'

Heden@ Q'Hasg BY PMfPM" ATTORNEYS. v

RADIANT HEAT FUEL-BURNER United States Patent fice Frederic O. Hess, Philadelphia,fPa., assignor to 'Selas Corporationof America, Philadelphia, Pa., a corporau tin ofPenns'ylvania This invention relates to a radiant Eheat fuel burner.

More specifically, the invention* concernsaburnetofthe f that the top panels tend .to warp .to a l-lirni-ted extent as a y Aresultwfl the heat-of the burner, and the 'extentoff'such Warpageis `increased '-withwincreased intensity 4ofheat, which is conducted-from,the` burnerto the top pa'nel of -the range.

It is accordingly arrobjectiof thisinvention to provide a'n improved radiant heat'ffuel burnerk structure which overcomes the heating Zand warping problems justvdescribed. Still another objectof this-invention' isto' provide 'akitchen-.rangelhaving :a radianti-heat ga's burn'er which is'suspended from 1the-toppanel of the range, and which Iis therefore free tomove with thetoppanel if all or any part'of the top panel shouldrnove. Still another object of this invention is to rninimizethe transfer' of heat from the burner structure tothe `top panel=offthe range, thereby minimizingtheivvarpage"of -the toppanel and provviding a cooler` exposed range surface.

Still'anothe'r object oflthis inventionis to provide connecting Yand'sealing.rneans associated with `theftop `panel ofi a kitchenrange and with the exposedcover 'plate of the'radiant heatgas burner, which sealing` means not only secures the respective parts together butfalsopro'- tects the'internal--parts of the-gasburneragainst damage froml spilled' foods, fluids; etc.

Another object ofthisinvention is-to providea radiant heat gas burner having an improved and simplified feed means for the-gestand air. VOther objects and advantages of this invention, including the isimplicityand economy. of the same, and the ease With which the invention rmaybe applied toranges and other heaters of 4various types, will further become apparent hereinafter and in the dra-wings, whereof:

Fig.` l represents Aa vertical seotional'view `taken-asin A2 Fig; 3 represents :a -plan1view ofvtheapparatusfshown in Figs.l 1 and 2;

t Figa-4 represents-a-sectionalfview taken asfindic'tedsliy the lines fand 'arrowsvIV-=IV fwhich appear in fFig. i3 fand Figli 5 representischematically a burrierfof this'llinvenvtion connected :to an texhaustf: means." 2

Turning now 'to the l'specificembodimentfof v4the finven'- tion` selected for :illustration iny -the f drawings, '-thefiradiant heat fuel burner is substantiallyzs'imilarfinrimany respects -to Vthe =burnerfdisclosed finche aforementioned "copentling i Williams n application? f Although sfthe oburner f will be dei `scribed-"as a gas=burner -fo-lathexs'ak'eiofconveilienceiitwill be.appreciatel :thatIother'fuels 'may be' substituted; v-

The number 20 designates afrefractoryfiring` 'above which is spaced fa coverv @plate 2li ofi fheat"transmitting material suehffas specialeglassnwhich:is resistantL to'therm'al .shock ibut-transparenti'fltoi heatV raysian'dT prefera'blyitoV visible llightfraysrasfwell. .'llhezr'efractoryiringf20and cover plate v2f1-V forman-,intervening cornbustliontspace 22 in which 'gas llanti aifiarefburned Theunumber'fzZS" Idesignatesv Tan `vinspirator forming: aipartialfpremix `offgas-fan'dair which flows Et'o thezcombustionspacethrough ian-annular sp'a'c'e located between lafverti'cliinnerf-tube 224 an'da concentric outerftube 25av f Secondary: airAllowsupwardlyvthroirgh the tube 24, mixingwithxth partial prernixy infthe 'eornbusL Ation'fspaoeZZ:and igniti1-ig1inffsaid combustion? spacelform- :ing hote*cornbusticmproducts.A Thefconbustion products the upper portion of clamping ring 36 engages the top face of wing 34. Accordingly it will be appreciated that the seal ring 35 and clamp ring 36 secure the cover plate 21, top panel 31, wings 34 and seats 33 in a xed relative position, thereby firmly securing the radiant heat burner to the top panel 31.

It will be appreciated that the burner and top panel are readily assembled by placing the cover plate 21 on top of the exhaust duct 26, the spacing of the cover plate 21 being determined by a spacer ring 42 formed at the top of the exhaust duct 26. The wings 34 are then fitted on the seats 33, and the seal ring and clamp ring structure 3S, 36 is applied downwardly, the vertical slot 37 being aligned vertically with the seat 33 and Wing 34. The seal ring 35 is then displaced circumferentially, whereupon each clamping extension 41 engages the corresponding seat 33, clamping it to the burner wing 34 immediately above.

It will accordingly be appreciated that the radiant heat burner is suspended from the top of the range, and is free to rise and fall should the range top warp. Moreover, the burner fits snugly against the range top even though the latter may not be exactly level.

In accordance with this invention, not only is the disadvantageous effect of the burner heat substantially eliminated, but the extent of such heat is also greatly reduced. It will be observed that the inner surfaces of the exhaust duct 26 are insulated by means of a ceramic liner 44 which covers said inside surface. The liner 44 may comprise a separate casting having the same shape as the inside surfaces of the exhaust duct 26. On the other hand, other forms of insulating surfaces may be substituted, and the ceramic insulation may be applied in other ways, as will readily be apparent.

Turning to the fuel combustion portion of the apparatus, it will be observed that the inner tube 24 has an outwardly extending flange 43 having a plurality of vertically extending openings 45 which are arranged substantially perpendicular to the cover plate 21. It will be appreciated that the partial pre-mix consisting of gas and air flows vertically through the openings 45 into the combustion space 22. Although it has heretofore been believed necessary to introduce the partial pre-mix in a radial direction outwardly across the combustion space 22, it has now been discovered that excellent combustion characteristics are obtained in accordance with the new construction just described. The radial ow of secondary air from the tube 24 coacts with the vertical gas flow to form a flat, uniform flame which spreads out radially against the surface of the refractory disc 20. This is an excellent flame since it quickly and uniformly heats the refractory ring to incandescence.

It will be appreciated that the radiant heat gas burner preferably includes automatic pilot operated means for igniting the mixture of gas and air, as well as other apparatus, as illustrated in the aforementioned co-pending patent application of John Roger Williams. Such features are not shown in the drawings, inasmuch as they constitute no part of the present invention.

It will further be appreciated that either raw gas or partial pre-mix may be provided in the annular space between the tubes 24, 25. Such space or passage is referred to for convenience herein as a gas passage or space, although other fuels may be substituted, mixed with air or in the raw state.

Although this invention has been described by reference to one specific embodiment thereof, it will be apparent to those skilled in the art that various changes other than those referred to above may be made in the form of the device, that equivalent elements may be substituted for those illustrated in the drawings, and that certain features of the invention may be used to advantage independently of the use of other features, all within the spirit of the invention as defined in the appended claims.

Having thus described my invention, I claim:

l. Domestic cooking apparatus comprising means forming a substantially flat substantially horizontal top panel having an opening therein, said top panel having a plurality of downwardly extending seat members spaced around said opening, and a radiant heat fuel burner including as a part thereof an annular exhaust duct Ismaller* in diameter than said opening and having substantially horizontal extensions arranged for seating engagement upon said seat members, and means for securing said duct to said seat members whereby said radiant heat fuel burner is suspended from said top panel, said last mentioned means bridging the space between said opening and said annular exhaust duct.

2. Domestic cooking apparatus comprising means forming a substantially flat substantially horizontal top plate. said top plate having a substantially circular aperture therein, said top plate including an annular ridged portion spaced from and concentric with said aperture, and said top plate also having depending seat portions spaced below the edge of said aperture, a fuel burner including a supporting structure having outwardly extending wings arranged for seating engagement on said seat portions, whereby said burner is supported from said top, said burner having a heat transparent cover plate located in' approximately the plane of said aperture, and means to fasten said burner and cover plate in said aperture including a seal ring bridging from radially outward of said annular ridged portion to radially inward of the edge of said cover plate.

3. Domestic cooking apparatus as defined in claim 2, wherein said seal ring includes a depending clamping portion having opposed clamping members arranged respectively to engage the upper surfaces of said wings and the lower surfaces of said seats.

4. In a domestic cooking apparatus including a substantially horizontal panel having an opening therein yand a radiant heat gas burner having a support on which a substantially flat heat-transmitting cover plate is mounted, connecting means for suspending the burner fro-m the top panel comprising means forming a seat fixed to said panel, means forming a wing fixed to said support, said wing being seated on top of said seat, a substantially rigid seal member arranged in the general plane of said top panel and said cover plate bridging from said panel to said plate, and a clamping means fixed to the bottom of said seal member extending downwardly at the edge of said opening between said cover plate and said top panel, said clamping means engaging both said seat and said wing thereby securing the seat, wing, top panel and over plate in fixed relative positions.

5. Domestic cooking apparatus comprising means forming a substantially fiat and horizontally disposed top panel having an aperture therein, seating members extending inwardly from the edge of said aperture, a gas burner including a body and a cover therefor, said body being provided with outwardly projecting supporting wings and being of a size to be received in said aperture with said wings resting on said seats, a clamping ring extending from a position radially outward of said aperture over said top to a point radially inward of the edge of said cover to bridge the space between the two, and means forming part of said ring engaging said wings and seats to lock wings and seats together and thereby hold said cover on said burner and said burner in position on said top.

6. Domestic cooking apparatus comprising means forming a substantially flat and horizontally disposed top panel having an aperture therein, a gas burner adapted to be received in said aperture and supported by said panel, said burner including a body having provisions to supply fuel and air thereto and a rim extending radially therefrom, a cover plate for said body of a size to rest on said r-im, cooperating means on said panel and body to support said burner in said aperture with said cover plate substantially flush with said panel, a ring of a size 3 to extend radially beyond the edge of said aperture and radially inward of the edge of said cover plate to bridge the space between the two, and means carried by said nng engaging said cooperating means to lock said burner in position in said aperture.

References Cited in the le of this patent UNITED STATES PATENTS Pierson Ian. 29, 1929 Gercich May 19, 1931

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