US2349788A - Kitchen heating gas range - Google Patents

Description

May 23, 1944- l J. F. HENNEssY 2,349,788

KITCHEN HEATING GAS RANGE Original Filed Sept. 5, 1939 2 Sheets-Sheet l May 23 1944- J. F. HENNEssY v 2,349,788

KITCHEN HEATING GAS RANGE Original Filed Sept. 5, 1939 2 Sheets-Sheet 2 Patented May 23, 1944 KITCHEN HEATING GAS RANGE v John F. Hennessy, Rockford, Ill., assignor to Geo. l D. Roper Corporation, Rockford, Ill., a corporav tion of Illinois original applicationW september 5, 1939, seriaiNe.

` 293,388. Divided and this application June 17,"

1949, serie1Ne.349,ss9

5 claims. (C1. 12e-90) heating unit especially designed and adapted for use in confined spaces, as, for example, in the heater compartments of kitchen heating gas ranges.

The principal object of my invention is to provide a heating unit made up of inverted J-shaped radiator sections so as Ito insure longtravel of products in a small space combined with reversal of flow for best heat dissipation, the legs of the Js intercommunicating to provide a combustion chamber extending longitudinally'of the heating unit, and the other crook ends of the Js also intercommunicating to provide an exhaust manifold extending longitudinally of the unit.

Other objects ofthe invention are concerned with the novel method of interlocking the radiator sections .to prevent displacement of one section relative to another, also the provision of end plates interlocked with the end sections to prevent displacement` with respect thereto and adapted to be secured in place by a single through bolt the tightening of which serves to draw all of the sections tightly together between the end plates so that there is no danger `of leakage of products of combustion, especially when the abutting faces of the sections are properly cemented.'

Still anotherobjeot consists in the provision in conjunction with the cast heating unit at the ile'end thereof of a heat exchange box of sheet metal construction into which the partially cooled products are discharged before passing into the' flue, whereby to give up additional heat through the thin walls thereof and accordingly appreciablyincrease the eiciency of the unit.

The invention'is illustrated inthe accompanying drawings,` in which- Fig. 1 is an end view of the range with the I end panel I removed so as to open the heater compartment to view, the View being in vertical section on the broken line `I--I of Fig. 4;

Figf2 is a horizontal section on the line 2 2 ofFigrly- H I Fig.4 3 is an end view of the radiator taken-on the line 3-3 of Fig. 1; `Fig. 4 is a cross-section taken on the line 4 ofFig.1,and

Fig. 5'is a horizontal section through the radi ator taken `on `theline 5;-5 of Fig. 3.

The same reference numerals are applied to corresponding parts throughout the views.

In the drawings, the heating unit II 'which I shall for convenience referto hereinafter'as the radiator is installed inl a compartment I2 of the range, which, inthe event that no heater were installed therein, would be adapted to take the conventional linings,l and'other equipment to serve as a baking oven, or as a utility comparte ment suitable for the storage of pots and pans. In the nished range the only externally appar-v ent difference between the kitchen heater type gas range and an ordinary type is that the panel I I] in the heater type contains'a y'grill or other suitable opening I3 forcirculation vof the heated air while in the othertype of range an ordinary panel without any opening therein is usedV in-v stead of thepanel I0. I f g The radiator II is supported by' two through bolts I4 which fit in holes inthe front and rear portions' of the angle ironbase frame I5-of the range, as indicated at I6 and I'I 'in Fig. 2. A hood or deflecting member I8 having vertical front and side walls' I9 and 2|) and an inclined top wall 2|,` cooperatewith the sheet metal back wall 22 of the range and the end panel I0 to enclose the radiator I I so as to direct heated air out throughqthe grill I3, air beinginduced by natural draft to enter the open bottom I2a.of

the compartment I2 and to'circulatewithinthe hood I8 upwardly around the radiator IIy so as to be heated therebyl before being deflected laterally by the inclined top of the hood out through the grill I3. `The hood I8 is fastened to the back Wall 22 by bolts 23 and 23a entered through the flanges 24 and 24a on the rear Vedges of the top and side walls -2I and 20, and to a sheet metal bottom Wallv 25 in the range by bolts `23 entered through flanges 21 on the lower edges-of the side wall 2i). The walls I9, 20,'and 2| are all suitably heat insulated, asindicated at 28,- to reduce heat loss by radiation and conduction through the hood I8.v The bolts I4 have heads 29 at one end for abutment with the front of the lower end 30 of the front end plate 3I on the radiator, and two spacer sleeves 32 on the bolts space the rear end plate 33 from the back of the base frame I1 when `thenuts 34 are tightened on the bolts to secure the radiator II in assembled position. At 35 is also indicatedca sheet metal baiile which is disposed horizontally below thegas burner 36 in the open bottom of the combustion chamber `3l of the radiator II. This baille shields theburner and also protects the oor from scorching and is suitably secured by its upturned front and rear ends 38 to the base frame l by bolts 39. A cleat 38a is bolted with the front end 38 of the baie 35 to the frame l5, as appears in Figs. 1 and 2, and has holes Ita therein to receive the front ends of the bolts I4, as shown in Fig. 2, whereby to provide increased bearing support for the bolts and avoid danger of these bolts becoming disengaged from the frame in event of distortion of the latter. burner 36 is suitably supported at its opposite ends in the chamber 3'! and can be lighted through an opening 4|) in the front end'plate 3|, the front wall I9 of the hood I8 also havingr easily accessible when the door 9 is opened.

The radiator cooperates with the burner 36 and consists of a series of hollow, inverted J-shaped, cast radiator sections 42 which are in internal communication with one another atv one end through their transverse substantiallrr rectangulartubular end portions 43. It is these latter portions which, placed in endl to end abutment, as in Fig. 1, form the combustion chamber 31, in. which the burner 36 is housed, as appears in Fig. 4. `The sections d2 are also in communication with one another at theirlotherY ends, remote from the combustion chamber 3l, through their transverse tubular end portions 43a, so as to form an outlet or exhaust manifold 37a from which the products of combustion from the burner 35 are discharged to the flue 49. The end plates3| and 33 close the opposite ends of the combustion chamber 3'! and manifold 31a, plate 3| providing the lighting opening 40 into the front end of the chamber 31 as previously stated, While plate 33 has a neck 45 for discharge of products from the rear end of the ,manifold The metal Wall 41 of said box. While the box is not required for successful operation of the heater of my invention, it does serve to increase its efficiency, for through it the partially cooled products give up additional heat before they are carried out through the vent neck 48 into the outlet flue 49. These products having already dissipated much of their heat through'the walls of the cast radiator sections would not cause much heat to pass through one or more additional heavy Walled radiator sections of the Ysame kind, however, they are found to transfer r aimreciable heat vthrough the thin sheet metal Yan opening 4| at this point to make the burner 31a. It is believed to be clear from Figs. 1 and 4 that the sections 42, due to their flattened form, divide the products of combustion from the burner into a seriesl of relatively Wide but 'thin streams or sheets from which the heat is efficiently dissipated through the Walls of thesections to the air scrubbing the-outside of these Walls.` Increased radiation varea results from. the ilattenedv cross-Section of the sections it?. to give sood'heat exchange and further area is added by providing protuberances 42a for further increased efficiency. vThe fact that the products after rising from the burner 36 are forced to reverse their direction in flowing into the mani fold 31a, is also a big factor in the eflicient heat transfer to the air circulatedV around the radiator. This reverse bend enables the provision in a relatively small space of a radiator capable of sufficient heat exchange to be eiective in a kitchen heating gas range, Where, as is well known, the heat mustbe available quickly inasmuchasthe heater is used mostly early in the morning to relieve the chill in the kitchen. Although it is not necessary that the radiator be Icomprised of a series of separable units, I prefer the sectional `construction shown', inasmuch as it lpermits the replacement of one or more sections, when desired, at much less expense than Would be entailed in. replacing a complete radiator. The construction also permits easily/'building larger or smaller sized radiators, when desired.

In addition to the radiator sections 42, the radiator may also be said to include the thin Walled trapezoidal shaped heat exchange box M which is shown to be in communication with a neck 45 on the rear end plate 33, by means of the flanged collar A6 formed on the front sheet Walls of the heat exchange box 44. In passing into this box the products are also slowed up enough to give an opportunity for heat transfer, the box serving as an expansion chamber. The neck 48 is formed on the sheet metal back Wall 5|] of the box. The Walls 41 and 50 are joined together by peripheral Walls 5|, as indicated at 52. In many prior heating units of the present class, the aim was to Y obtain quick heat transfer between the products inside the radiator and the air outside, and accordingly thin sheet metal was used, which gave rise to the objection that the unit would soon rust and require replacement. Furthermore in many of these sheet metal units there was evidence of scorching, Which could be detected by odors given off from the hot sheet metal. These objections are avoided in the. device of my invention byproviding a radiator made up of cast sections, and While that makes for thicker Walls which do not exchange vheat as quickly from the. products inside the radiator to the air outside, that difficulty is overcome by providing for a longer path of iow so as to obtain sufcient heat exchange. The partially cooled products leaving the radiator pass into the sheet metal heat exchanger Where a, further heat exchange through 'the thin sheet metal walls will occur before the products are ultimately discharged into the outlet flue. In that Way the air is heated uniformly and Without evidence of scorching and the unit is still small enough to t in the relatively smallspace avail'- able in a kitchen heating gas range.

The radiator sections 42 are constructed so as lto interlock to prevent displacement of one section relative to another from assembled relationship once the through bolt 53 is tightened.' This interlocking is accomplished in the present instance by means of the protruding lugs 54' onY top of the end portions 43 and 43a of the sections 42 at one end arranged to overlie the edge portion of the other ends of said end portions 43'.

ilarlv located projections 55 on abutting sections.:

while lugs 54 on each section overlie the edge portion of the next section. The plate 3| has corresponding lugs 54a and 55a thereon. and the plate has lugs EEa thereon for asimilar pure nose. Obviously any other suitable or preferred method for maintaining the several sections and plates in the desired relationship may be 'employed. The present construction, however. is preferred because of its simplicity and economy and because it enables use of a single through bolt 53 for holding the sections and end plates' in assembled relationship.` The sections t2 are It is believed the foregoing description conveysI a good understanding 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 -I claim: l

- 1. A heater comprising, in combination, a plurality of hollow radiator sections, each comprising an inverted generally U-s'haped tubular body portion of small dimension longitudinally ,and appreciably greater dimension transversely, said body communicating atone end with a transverse tubular end portion and having the other end communicating with `another transverse tubular end portion in parallel, laterally spaced, separated relationship to the rst end portion, Vthe sections being disposed in assembled relation with the first-mentioned end portions in end to ond abutment whereby mutually to provide a 'combustion chamber of relatively enlarged capacity adapted to receive an elongated burner and the second-mentioned end portions in end to end abutment whereby mutually to provide an outlet manifold of relatively reduced capacity, an end plate for each end of said assembly, one of said plates closing the adjacent ends of the combustion chamber and outlet manifold, and the other end plate closing the other end of the combustion chamber and outlet manifold and having an opening provided therein communicating with the adjacent end of the outlet manifold for the discharge therethrough of products of combustion, each of the sections having longitudinal projections on top of the end portions thereof on one abutting face of the section arranged to overlie the top of the abutting end portions of the next section, each of said sections also having other longitudinal projections on the same abutting face on diametrically opposite sides of the section arranged to underlie lateral projections provided on diametrically opposite sides of the abutting end portions of the next section, whereby to maintain said sections against relative rotary displacement while in assembled relationship, and a single through bolt extending longitudinally of the assembly from one end plate to the other between the first named tubular end portions forming the combustion chamber and the other portions forming the outlet manifold and serving to force the end plates toward one another whereby to secure the sections together in assembled relation.

2. A heater comprising, in combination, a plurality of hollow radiator sections, each comprising an elongated tubular body portion communieating at opposite ends with a transverse tubular end portion, the sections being disposed in assembled relation with correlated tubular end portions registering and disposed in end to end abutment, whereby to provide a combustion chamber and an outlet manifold in spaced relation to one another, and plates for the ends of said assembly closing the ends of the combustion chamber and outlet manifold, one of said plates `having an opening provided therein communieating with the adjacent end of the outlet manifold for the discharge therethrough of products of combustion. each of the sections having longitudinal projections on top of the end portions thereof on one abutting face of the section arranged to overlie the top of the abutting end portions of the next section, each of said sections also `having other longitudinal projections on the-same abutting face on diametrically oppositesid'es of the section arranged to underlie lateral projections provided on diametrically opposite sides of the abutting end portions of the next section, whereby to maintain said sections against relative rotary displacement while in assembled relationship, and fastening means extending longitudinally of the assembly and interconnecting the end plates so as to secure the sections together in assembled relation.

3. A heater comprising, in combination, a plurality of hollow radiator sections, each comprising an elongated tubular body portion communicating at opposite ends with a transverse tubular end portion, the sections being disposed in assembled relation with correlated tubular end portions registering and disposed in end to end abutment, whereby to provide a combustion chamber and an outlet manifold in spaced relation to one another, one of said plateshaving an opening provided therein'communicating with the adjacent end of the outlet manifold for the discharge therethrough of products of combustion, each of the sections having longitudinal projections on` top of the end portions thereof on one abutting face of the section arranged to overlie the top of the abutting end portions of the next section,`each of said sections also having other longitudinal projections on the same abutting face on diametrically opposite sides of the section arranged to underlie lateral projections provided on diametrically opposite sides of the abutting end portions of the next section, whereby to maintain said sections against relative rotary displacement while in assembled relationship, an end plate for each end of said assembly, one of said plates closing the one end of the combustion chamber and outlet manifold and having longitudinal projections on the top thereof to overlie the top of the abutting end portions of the adjacent end section and also having other longitudinal projections on diametrically opposite sides thereof arranged to overlie the lateral projections on the diametrically opposite sides of the abutting end portions of the adjacent end section, the other of said plates closing the other end of the combustion chamber and outlet manifold and having lateral projections provided thereon on diametrically opposite sides thereof for engagement therebeneath of the longitudinal projections provided on diametrically opposite sides of the adjacentend section, whereby said end plates are held against relative rotary displacement while in assembled relationship, and fastening means extending longitudinally of the assembly and interconnecting the end plates so as to secure the sections together in assembled relation.

4. A heater comprising, in combination, a plurality of hollow radiator sections, each comprising an elongated tubular body portion communieating at opposite` ends with a transverse tubular end portion, the sections being disposed in assembled relation with correlated tubular end portions registering and disposed in end to end abutment, whereby to provide a combustion chamber and an outlet manifold in spaced relation to one another, end plates for the ends of said assembly closing the ends of the combustion chamber and outlet manifold, one end of the outlet manifold being open for the discharge of products of combustion, each of the sections having longitudinal projections on top of the end portions thereof on one abutting face of the sections against relative rotary displacement While in assembled relationship, and means for Securing the radiator sections and end plates in assembled relationship.

5. A heater comprising, in combination, a plurality of hollow radiator sections, each comprising an elongated tubular body portion communicating at opposite ends with a transverse tubular end portion, the sections being disposed in assembled relation with correlated tubular end portions registering and disposed in end to end abutment, whereby to provide a combustion chamber and an outlet manifold in spaced relation to one another, one of said plates having an opening provided therein comunicating with the adjacent end of the outlet manifold for the discharge therethroughof products of combustion, each of the sections having longitudinal projections on top of the end portions thereof on one abutting face of the section arranged to overlie the top of the abutting end portions of the next section, each of said sections also having other longitudinal projections on the same abutting face on diametrioally opposite sides oi the section arranged to underlie lateral projections provided on diametrically opposite sides of the abutting end portions of the next section, whereby to maintain said sections against relative rotary displacement while in assembled relationship, end plates for the ends of said assembly closing the ends of the combustion chamber and outlet manifold, one end of the outlet manifold being open for the discharge of products of combustion, one of said plates having longitudinal projections on the top thereof to overlie the top of the abutting end portions of the adjacent end section and also having other longitudinal projections on diametrically opposite sides thereof arranged to overlie the lateral projections on the diametrically opposite sides of the abutting end portions of the adjacent end section, the other of said plates having lateral projections provided thereon on diametrically opposite sides thereof for engagement therebeneath of. the longitudinal projections provided on diametrically opposite sides of the adjacent end section, whereby said end plates are held against relative rotary displacement While in assembled relationship, and means for securing the radiator sections and end plates in assembled relationship.

JOHN F. HENNESSY.

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