US2350500A - Gas range - Google Patents

Description

June 6A, 1944.V G. J. ELTz, JR '2,350,500

' GAS RANGE Filed March 4,Y 1941 Figi. lo a6 24 mms z5 7o VENTOR ATTORNEYS Patented- June 6, 1944.

UNITED STATES PATENT ori-ICE y Application March 4, 1941, Serial No. 381,679-

4 Claims.

This invention relates to gas ranges, and more particularly to improvements in gas ranges for domestic cooking purposes, and the like.

One of the objects of the invention is to provide an improved gas range which will be of improved characteristics with respect to control of heat production; efficiency of useful application of the generated heat; speed of application of heat to the mounted cooking utensils; cleanliness of operation; freedom from leakage of gas and/or combustion fumes externally of the range; elimination of undesirable heating of the atmosphere of the room housing the range; and general economy of operation. More specific objects of the invention will appear from the specification hereinafter.

In the drawing:

Fig. l is a fragmentary vertical section through a range of the invention showing one heating plate element thereof in section and another heating plate element thereof in elevation;

Fig. 2 is a bottom plan, on an enlarged scale, of a heating plate element thereof;

Fig. 3 is a top plan, on an enlarged scale, of a burner element thereof;

Fig. 4 is a section taken substantially along line IV-IV of Fig. 3;

Fig. 5 is an enlarged view ofthe control mechanism of. the range of Fig. 1, with portions shown in section and other portions thereof shown in elevation; and

Fig. 6 is a section, n an enlarged scale, through the valve head portion of the control mechanism, taken substantially along line VI-VI of Fig. 5.

The invention contemplates generally an improved gas range construction wherein application of gas generated heat is more usefully applied to the cooking utensil heating operations of the range, and wherein the range is so constructed that heat-'generated by the gas burning operation is substantially prevented from becoming dissipated into the atmosphere of the room housing the range, and wherein an improved gas burner and burner control mechanism is provided whereby cooking temperatures may be accurately regulated with improved facility.

AThe range is illustrated by way of example in the drawing as comprising generally a cabinet structure which may be of any desired general form and of any suitable material. The cabinet comprises generally opposite side and end walls 2| and 22, respectively, and a top cover 23 which ls provided with suitable openings therethrough to receive heating plate elements 2l in neste relation thereon. The heating plates 2d may.'

of course, be of any desired number and arranged with respect to the plan view of the range in any manner desired. As illustrated in Figs. l and 2, the heating plates 2d are in the form of castings of aluminum metal or the like having plate top surfaces for support of cooking utensils thereon, and the top cover 23 of the range cabinet is formed with recessed shoulders as at 26 to support the marginal edge portions of the heating plates 24 in nested relation upon the range top. The plates 24 are `generally voi inverted frusto-conical form,(Fig.=1-).and at their bottom central portions are` cupped -as at -21 to receive the burner gas flame rtherein as will be explained more fully hereinafter.

Burners 3l! are mounted upon a horizontal shelf 3l of the cabinet ZIB so as to be in registry with the cupped portions 2l of the heating plates. As illustrated in Figs. 3 and 4, each bu-rner unit comprises a .plurality of gas conveying jets 35 which are mounted in a base plate 36 to direct streams of gas therethrough and upwardly toward the corresponding heating plate. The jets 35 are in the form of centrally bored tubular members which are mounted in the base plate 36 by means of screwthreaded connections at 31, 'and thus different jets having differently dimensioned orifices may be interchanged in the burner device. Ea'ch jet 35 is arrangedv to be separately fed with gas through a corresponding conduit 38 leading through the base plate 36 (Fig. 4). A burner chimney 40 of cylindrical form is mounted upon the base plate 35 to extend upwardly therefrom to enclose the gas issuing from the jets as it moves toward the heating plate. and the chimney l0 is interiorly partitioned-as at 4| so as to divide the chimney into separate segments corresponding to the individual jet members. Air inlet orifices 42 are provided in side wall portions'of the chimney l0 adjacentthe respective jets 35 so as to lpermit-suitable vsupplies of air to be induced to flow into the Aburner structure as required for combustion purposes, as in the manner of Bunsen -burner operation.

As illustrated in Figs. 3, 4 and 5, the burner unit embodies ve separate jet and chimney compartments, which are separately fed by five correspending conduits 38, but it will be understood that this specific number and relative arrangement of burner jets is not critical. and that 'any other desired number of jets and iet feeding arrangements rnav be employed within the concept of the invention. In anyy case each jet supply conduit 38 will be separately fed by gas through control means providing forselective operation of the various jet members. For example, as illustrated in Figs. and 6, the control device may comprise a valve designated generally at 50 which includes a housing 5| and a valve head 52 rolead into 4`the housing 5| through ports 56 extending into communication with the bore of the housing 5| at intervals spaced longitudinally thereof. An end closure plate 51 is arranged to close the housing 5| at its end opposite the control handle 55, and a gas inlet conduit 60 leads through the closure plate 51 into open communication with the interior of the housing 5|. The valve head 52 is formed with a4 gas conduit 62 leading through the end thereof and 'thence ra-v dially so as to emerge at a recessed wall portion of heat supply to the heating plate members of l 64 of the valve head. As shown in Fig. 5, the g valve head 52 is recessed at the portion 64 thereof so as to provide a gas conveyingspace 65 -be-f tween'the recessed wall portion and the valve housing 5|, and the recessed portion 64 of the valve head extends longitudinallythereof in stepped relation so as to leave valveI seat portions 68 disposed circumferentially in extended relation and adapted to be brought into successive registry with corresponding gas outlet ports 56 of the valve housing 5| upon rotation of the valve head 52. Thus, start-ing from a position of all outlet ports closed, rotation of the valve head causes the outlet ports 56 to be successively opened to the space 65. commencing with the outlet port next adjacent the right-hand end of the valve mechanism as illustrated in Fig. 5, and continued rotation of the control handle 55 provides cumulative operation of diierent of the burner ele-l ments as fed by the conduits 38. A compression spring 69 is arranged to bear against the valve core 52 so as to maintain it in gas-sealing relation with respect to said housing at all times.

The burner tips 35 may be provided of any desired bore dimension so that initial movement of the control handle 55 will cause one of they the control handle 55 will similarly bring into' operation additional of the burners 35. depending upon the degree of rotation of the control handle 55 away from burner-01T position. Any suitable type of index device 1| may be arranged in conjunction with the control handle 55 so as to provide a convenient visible indication of the selective positions of the controlhandle and the corresponding `rate of gas flow through the various burner elements, whereby the operator of the range willbe enabled to set the control handle-.55 at the position corresponding to the de .heat through the heating plate.

the range may thus be. regulated at will, and that thefineness of such regulations are limited only by practical considerations relating to determination of the number of burner elements 35 to be included in any one burner device adjacent the corresponding heating plate.

Thus, it will be understood that a gas burner arrangement is provided which involves multiple gas burning jets, each of which are separately and selectively brought into operation by manipulation of a single control .member which may be adjusted to provide any desired heat producing operation through means of selective and/or cumulative operation of the various burner elements of the device. Thus, any adjusted heat producing operation is available while at all times the gas combustion process is so conducted as to provide maximum emciency of transmission of the heat of combustion to the point of useful application thereof.

Preferably, the cover plate 23 of the range top will be heat insulated as at 10 by means of any suitable heat insulation material, and the heating plate members will be arranged to closely fit thereagainst in substantially air-sealing relation so that no heated air or gaseous products of combustion will be permitted to move through the range top plate and into the atmosphere of the room about the range. For similar purposes the end and side wall portions of the range will be preferably of gas-tight construction and a flue 12 will be arranged to conduct the gaseous products of combustion from around the burner units to the atmosphere outside of the room housing the range.

As illustrated in Figs. 1 and 2, the bottom surfaces lof the heating plates 2l are of 'inverted frusto-conical form having their centers disposed above and in line with corresponding burner devices 30. The apex portions of the plates 24 are concaved as at 21 to receive the blast of ame from the corresponding burner units in centrally focused relation thereon. Thus, the flame is adapted to move from the center concave portion radially and upwardly against the tapering wall portions of the plates, and in order to somewhat retard the movement of the heating gas, a

-series of baille walls 15 are arranged to extend below the plates 2l as integral portions thereof. 'I'he baille walls 15 may be occasionally slotted as at 16 so as to allow a limited amount of heated gas ow directly through the baille walls, whereby the heating plates are adapted to eiliciently transmit the heat to the cooking utensils. Thus, increased heat absorption by the heating plate is provided, and the burner and heating plate arrangement results in optimum eiilciency of cornbustion` and of useful application of the generated heat to the cooking utensil supported upon the heating plate.

As shown in Fig. l, the heating plate 24 is preferably provided with an insert 11 comprising a mass of heat insulating material adapted to function as abaille against uneven transmission of Thus, direct transmission of the majority of the kburner heat through the center portion of the heating plate such as would providea so-called hot spot at the center of the utensil supporting upper surface thereof, isavoided. It will be understood that the material of the insert'11 may be of any` suitable character such yas'dead ai'r or sand as plate 24 of molten metal while positioning a core of sand in the location of the insert 11. Thus. the core sand may or may not be removed subsequent to cooling of the casting. and an effective heat insulating insert will thus be provided at 11.

Although only fa single form of the invention is shown and described in detaill it will be understood that yvario'us changes may be made therein without departing from the spirit of the invention and the scope of the appended claims.

I claim:

1. A substantially cylindrical tubular gas .burner having a plurality of radially extending walls therein forming 'a plurality of sectoral mixing chambers, and gas inlet means at the bottom of each chamber, said burner'having openeach of said chambers for ultimate combustion at the upper end of said burner.

ings in its periphery providing an air admitting for ultimate combustion at the other end of saidv 3. An elongate tubular gas burner having a plurality of radially extending walls therein extending lengthwise to form a plurality of sectoral mixing chambers extending through said burner, and gas inlet means at one end of each chamber, said tubular burner having openings providing an air` admitting opening for entrainment of air with the gas passing through each of said chambers for ultimate combustion at the other end of said burner. l

4. An elongate tubular gas burner having a plurality vof radially extending walls therein extending lengthwise to form a plurality of sectoral mixing chambers extending through said burner, gas inlet means 'at one end of `each chamber, said tubular burner having openings providing an air admitting opening for entrainment of air with the gas passing through each of said chambers burner, and valve means for opening any selected number of said gas inlet means whereby each operative mixing chamber operates at full capacity and maximum etllciency at all degrees of burner operation.

v GEORGE J. ELTZ. Jn.

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