US2325772A - Kitchen heating gas range - Google Patents

Description

nnnnnllnn Aug. 3, 1943. J. F. HENNESSY 2,325,772

KITCHEN HEATING GAS RANGE Filed Sept. 5. 1939 3 Sheets-Sheet 1 1943. J. F. HENNESSY 2,325,772

KITCHEN HEATING GAS RANGE Filed Sept. 5, 1939 3 Sheets-Sheet 2 1943. J. F. HENNESSY 2,325,772

KITCHEN HEATING GAS RANGE Filed Sept. 5, 1939 3 Sheeis-Sheet 5 J a 42 jad Patented Aug. 3, 1943 KITCHEN HEATING GAS RANGE John F. Hemiessy, Rockford, .Ill-., assignor to Geo.

D. Roper Corporation tion of Illinois Rockford, 111., a corpora- Application September 5, 1939, Serial No. 293,388

7 Claims. 5

This invention relates to domestic gas ranges, and is particularly concerned with an improved kitchen heating gas range.

It is one of the principal objects of this invention to provide a kitchen heater construction for gas ranges so designed that it may be installed in an allotted compartment of a range that may be otherwise of conventional construction, the present invention providing a gas heated radiator in the form of a separate unit adapted to be installed in the range, as distinguished from a built in" type of heater, which is invariably more complicated and expensive.

In accordance with this invention, I have provided a side panel for the heater compartment equipped with a hot air grill, in combination with a hood inside the compartment surrounding the gas heated radiator for directing the heated air toward the grill and out into the room. The radiator is designed with a view to providing increasedradiation area in a confinedspaceand the hood is designed to make natural draft operation of the present heater practical.

Another object of my invention is to provide inverted J-shaped radiator sections so as to secure long travel of products of combustion in a small space and reversal of flow for best heat dissipation.

Another object is to provide in conjunction with the cast radiator, at the flue end thereof, a heat exchange box of sheet metal construction into which the partially cooled gases from the radiator are discharged before passing into the flue, whereby to give up additional heat through the thin walls thereof and accordingly increase the efliciency of the device.

The invention is hereinafter described by reference to the accompanying drawings, wherein Fig. 1 is a perspective view of a gas range embodying the heater of my invention;

Fig. 2 is a fragmentary front elevation of the structure shown in Fig, 1 with the door 9 opened;

Fig. 3 is a. vertical cross-section on the line 3-3 of Fig. 4;

Fig. '4 is an end view of the range with the end panel I removed so as to open the heater compartment to view, the view being in vertical section on the broken line 4-4 of Fig. 7;

Fig. 5 is a horizontal section on the line 5-5 of Fig. 4;

Fig. 6 is an end view of the the line 66 of Fig. 4;

Fig. '7 is a cross-section in a plane parallel to Fig. 3, taken on the line 1-1 of Fig. 4, and

radiator taken on corresponding parts throughout the views.

In the drawings, the heating unit II, which I shall for convenience refer to hereinafter as the radiator, is installed in a compartment I2 of the range below the burner box, which, in the event that no heater were installed therein, would be adapted to take the conventional linings and other equipment to serve as a baking oven, or as ,a utility compartment suitable for the storage of pots and pans. The bottom of the burner box forming the top of the radiator or air heating compartment I2 appears in section in theupper portions of Figs. 3 and '7. The cooking top with which the burner box cooperates is shown in Fig. 1 as covered by a folding lid in the well known way. In the finished range the only externally apparent difference between a kitchen heater type gas range and an ordinary type is that the panel I8 in the heater type contains a grill or other suitable opening I3 for circulation of the heated air while in the other type of range an ordinary panel without any opening therein is used instead of the panel II).

The radiator II is supported by two through bolts I4 which fit in holes in the front and rear portions of the angle iron base frame I5 of the range, as indicated at I6 and I1 in Fig. 5. hood'or deflecting member I8 having vertical front and side walls I9 and 28 and an inclined top wall 2|, cooperate with the sheet metal back wall 22 of the range and the end panel I0 to enclose the radiator II so as to direct heated air out through the grill I3, air being induced by natural draft to enter the open bottom I2a of the compartment I2 and to circulate within the hood I8 upwardly around the radiator II so as to be heated thereby 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 edges of the top and side walls 2I and 20, and to a sheet metal bottom wall 25 in the range by bolts 26 entered through flanges 21 on the lower edges of the side Wall 20. The walls I9, 28, and 2| are all suitably heat insulated, as indicated at 28, to reduce heat loss by radiation and conduction through the hood I8. Thebolts 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 I! when the nuts 34 are tightened on the bolts to secure the radiator II in assembled position also permits easily building larger or smaller tion. At 35 is also indicated a sheet metal baffie which is disposed horizontally below the gas burner 36 in the open bottom of the combustion chamber 31 of the radiator l I. This baflie shields the burner and also protects the floor from scorching and is suitably secured by its upturned front and rear ends 38 to the base frame l by chamber 31 and can be lighted through an opening 43 in the front end plate 3|, the front wall ISof the hood l8 also having an opening 4| at this point to make the burner easily accessible when the door 3 is opened.

The radiator ll 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 at one end through their transverse substantially rectangular tubular end portions 43. It is these latter portions which, placed in end to end abutment, as in Fig. 4, form the combustion chamber 31, in which the burner 38 is housed, as appears in Fig. 7. The sections 42 are also in communication with one another at their crook ends, remote from the combustion chamber 31, through their transverse tubular end portions 43a so as to form an outlet or exhaust manifold 31a from which the products of combustion from the burner 36 are discharged to the flue 49. The end plates 3| and 33 close the opposite ends of the combustion chamber 31 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 31a. It is believed to be clear from Figs. 4 and? that the sections 42, due to their fiattened form, divide the products. of combustion from the burner into a series of thin streams or sheets from which the heat is efllciently dissipated through the walls of the sections to the air "scrubbing the outside of these walls. In-

- creased radiation area results from the flattened cross-section of the sections 42 to give 'good heat exchange and further area is added by providing protuberances 42a for further increased efficiency. The fact that the products after rising from the burner 36 are forced to reverse is suitably supported at its opposite ends in the their direction in flowing into the manifold 31a is also a big factor in the efllcient heat transfer to the air circulated around the radiator. This reverse bend enables the provision in a relatively small space of a radiator capable of sufficient heat exchange to be effective in a kitchen heat sized radiators, when desired.

In addition to the radiator sections 42, the

radiator ll may also be said to include the thin-walled trapezoidal shaped heat exchange box 44 which is shown to be in communication with a neck 45 on the rear end plate 33, by means of the flanged collar 46 formed on the front sheet 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 ef- I heavy walled radiator sections of the same kind,

however, they arefound to transfer appreciable heat through the thin sheet .metal 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 serv-v ing as an expansion-chamber. The neck 48 is formed on the sheet metal back wall.5il of the box. The walls, and 50 are joined together by peripheral walls 5|, as indicated at 52.

The radiator sections 42 are constructed so as to 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 on 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 and 43a, and by pairs of lugs 55 which underlie pairs of projections 56 as indicated. The arrangement of the lugs 54 and 55 and projections 56 should be clear from a study of Figs. 6 and 7, the lugs 55 being in diametrically opposed relation on each section and engaging beneath similarly located projections 56 on abutting sections, while lugs 54 on each section overlie the edge portion of the next section. The plate 3i has corresponding lugs 54a and 55a thereon, and the plate 33 has lugs 56a, thereon for a similar purpose. 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 itsysimplicity 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 42 are adapted to be sealed against leakage of products'by cementing, as at 51.

I claim:

'1. A heater of the class described, comprising a housing defining an air heating compartment and including a substantially vertical back wall and an end wall having an upper warm air discharge opening provided therein, said air heating compartment being open at the bottom for intake of air to be heated, a gas heated radiator supported substantially vertically in said compartment, the radiator being of invertedJ- shape and including a burner in the lower end which is in the bottom of said compartment, the

upper crook end of said radiator having an outlet for the discharge of products of combustion from said burner, a radiator enclosing hood for conducting air from the open bottom of the compartment upwardly around the radiator and directing the heated air laterally from the upper portion of said compartment through the air discharge opening in the aforesaid end wall, and

a sheet metal combination heat radiating and expansion box disposed between the back wall of said compartment and said radiator and having an inlet opening provided in one side thereof communicating with the radiator for discharge of products from the radiator into said box, and said box having another opening provided in the opposite side thereof for discharge of products therefrom.

2. A heater of the class described, comprising a housing defining an "air heating compartment and including a substantially vertical end wall having an upper warm air discharge opening provided therein, said compartment having one or more openings in the bottom thereof for intake of air to be heated, a gas heated radiator including a gas burner supported in the bottom of said compartment and extending upwardly therein, said radiator comprising spaced, vertical, hollow columns of inverted J-shape, the upper crook end portions of which are directed toward and warm air discharge opening and terminate in spaced relation thereto, the upper crook end portions being also directed downwardly so as to cause a reversal in the direction of flow of products of combustion before-ultimate discharge from theradiator, a combustion chamber connecting the lower ends of ;saidcol-" mm and receiving said gas burner, anfoutlet manifold connecting the other'enjds of umns, and a radiator-enclosingfhood' i air circulates from theair intake 'openin supwardly around and-between thecolumn radiator andoutthrough'the warm'ai discharge opening. .m x '3. A heater asset forth inf claim, 2, including; 7,

a sheet metal combination heat ir adiating and, ing provided,

in one side thereof communicating Iiththe outexpansion b'ox 'havingan; inlet 6 tending longitudinally of the lower end thereof in remote relationship to the warm air discharge opening, and an outlet manifold extending longitudinally of the radiator in elevated relation to the combustion chamber and between the combustion chamber and the warm air discharge opening, the top of the radiator being disposed in close proximity to the aforesaid inclined top wall.

5. A heater as set forth in claim 4, including a sheet metal combination heat radiating and expansion box having substantially vertical side and end walls, a substantially horizontal bottom wall, and an inclined top wall substantially paralleling the inclined top wall of said air heating compartment, said box having an inlet opening provided in one end wall communicating with the outlet manifold to receive products of combustion from the radiator and having another opening provided in the opposite end wall for discharge of products therefrom, said box being disposed closely beneath the inclined top wall of said compartment between the back of the radiator and the adjacent side wall of the compartment.

6. A heater as set forth in claim 4, including a sheet metal combination heat radiating and excharge of products therefrom, said box being disposed within said compartment between the back of the radiator and the adjacent side wall ,of the compartment in the path of air circulati'on through said compartment.

a 7. A heater comprising, in combination, sub stantially vertical side walls and a top wall defining an air heating compartment having an upper warm, air discharge opening and a lower cold let manifold-"to receive products of combustion from the radiator, and s'aidboxha'ving another opening: provided inithe opposite side thereof for discharge of-products therefrom, said box being disposed within the hoodin'the path of air circulation through said hood.

4, A heatercomprisinyin combination, substantially vertical side walls defining an air heating compartment, an inclined'top wall for said compartment, the highjend of which is disposed above an upper'warm air discharge opening provided in one of the aforesaid vertical wallsso asto direct upwardly circulating heated air from saidcompartment outwardly through said opening, said compartment having one or more openings in thebottom thereof for intake of air to be heated, and an air heating radiator mounted in said compartment, which in vertical cross-section is generally of inverted J-shape with the upper crook end portion directed laterally toward the warm air discharge opening air inlet opening, an air heating radiator dis-- posed in said compartment, comprising a plurality of cast metal sections, the radiator sections in assembled relationship forming a lower elongated combustion chamber adapted to receive an elongated gas burner and an upper elongated outlet manifold connected with the combustion chamber by elongated tubular heat radiating elements which conduct products of combustion from the combustion chamber to the manifold for eventual discharge from the radiator, said radiator taking up the majorportion of the space in said compartment and having the top thereof in closely spaced relation to the top wall of said compartment, and a sheet metal combination heat radiating and expansion box of enlarged size in relation to the size of a radiator section having an inlet ,opening provided in one side thereof communicating with the outlet manifold to receive products of combustion from the radiator, and said box having another opening provided in the opposite side thereof for discharge of products therefrom, said box being disposed in the path of air circulation through said compartment.

JOHN F. HENNESSY.

Images