US2147331A - Combination range - Google Patents

Description

' Feb 14, 1939- n H. T. BURROW 2,147,331

COMBINATION RANGE Filed Dec. 5l, 1955 2 Sheets-Sheet l Feb. 14, 1939. H. T. BURROW COMBINATION RANGE Filed Dec. 3l, 1935 2 Sheets-Sheet 2 Patented Feb. i4, 1939 curso STATES PATENT `FFiCE.

2,147,331 coMBINA'rIoN man Herbert T. Burrow, Beaver Wis., assigner to Maileable Iron Range Company, Beaver Dam, Wis., a corporation of Wisconsin My invention relates to improvements in coml i bination ranges, that is in coal-wood-gas ranges.-

or. coal-wood-electric ranges, although certain features of the improvements are applicable .to ranges of other types. i

Heretofore, the conventional` kitchen heater type oi range has been equipped with a rectangular fire box section at one side of the oven (usually the left side) and a cooking top with two cooking lids therein, in 'addition to the gas or electric heating units above the oven section.

One object of the present invention is to provide a larger cooking top above the coal or wood burning section than is available in the conventional kitchen heater.

Another object is to provide, in a combination range, a cooking top having four coal-wood cooking plates, balanced by an equal number of gas or electric burners. v

An additional object is to improve the eiiiciency of the range as a room heater, by providing an intermediate chamber between the nre box section and the oven, 'thus making, both sides of said fire box available for the eii'ective radiation of heat, said chamber having openings in its walls whereby air may circulate through said chamber and convey heat to the room.

Another object is to provide a-combination range of this` type in which the rear ue is located behind the intermediate chamber instead oi behind the re box section, whereby the rear end of the latter is free to radiate heat into the room.

A further object is to provide, in a combination range of this type, a circuitous path for the products of combustion immediately below the coal-wood cooking top whereby all of the cooking lids are amply heated.

Another object is to provide an improved iiue at the rear of the range having a double duty shield as part thereof.

Another object is to provide a range of this type having a water tank within the intermediate or warming compartment between the iire box and the oven.

An additional object is to provide, in a range of this type, a pair of doors on one side thereof to conceal the front ofithe re box section and oi the warming compartment (or water reservoir therein) said doors being of a'size and design to substantially balance the oven door on the other l side of said range.

In the accompanying drawings I have illustrated one embodiment of the invention and several modiiications of certain features thereof:

' Fig. 1 is a perspective view of a range-with parts removed;

Fig. 2 is a perspective view of the coal-wood cooking top;

Fig. 3 is a rear elevation; Fig. 4 is an elevation of a detail; Fig. 5 is a section on the line 5-5 of Fig. 1;

Fig. 6 is a section on the line 6-6 of Fig. 3;

Fig. 7 is a front elevation of a water reservoir. In its commercial embodiment the range comprises a suitable base I0 l.and a front which includes the wall il, doors l2, i3, oven door I4 and panel IB above the latter. The top frame casting IC for the left hand half of the range supports the usual apertured plates i1 and i8, each having a pair of openings therein which receive the usual stove lids I9, I9, and 20, 20.

The right hand top plate 2l' of the range has openingstherein which in number and arrangement balance the openings for the stove lids in the left hand side, thus providing a. pleasing arrangement. These openings, which are indicated diagrammatically at 22, may be either the conventional gas burners or electric heating units, depending on whether the range comprises a.

electric range.

One of the end walls 23 has draft'openings 24 in it. The rear wall is indicated at 25 in Figs. 3 and 5 and is provided with a rear flue 26.

A nre box 21 and conventional grates 28 are located in the upper left hand side of the range,

with an ash pan 29 beneath the same. The front wall il contains an opening 30 permitting withdrawal of said ash pan. The opening for the ash pan and the conventional type of fire box front with a wood ilre door at the top is concealed normally by the lett hand door i2. Said front wall also contains an equally large opening 3l giving access to a compartment which may be used for storage space or as a warming compartment or as a space in which to insert a water reservoir, as hereinafterdescribed more fully. The door I3 normally conceals the opening-3|.

Above the compartment referred to is a substantially horizontal flue casting 32 having reinforcing ribs 33. See Figs. 1, 4 and 5. This casting provides-a flue between itself and thetop of the range and constitutes an extension of the vcombustion chamber above the grates. A vertical partition 3l, or cut-olf casting, is arranged at the rear center of this upper space or combustion chamber, as shown in Fig. 1', and causes the heated air and gases from the iire box after they ascend therefrom, to travel toward the front of ilsV v 25 combination coal-wood-gas range or a coal-woodthe stove before doubling back toward the rear flue, as shown by the arrows. Air enters the fire box through the long series of draft openings 24. which air circulates through and around the flre bed as indicated by the arrows in Fig. l, the products of combustion serving to heat satisfactorily all four of the coal-wood lids and in particular the forward one of the two lids 20, which ordinarily would not receive much heat.

The products of combustion pass horizontally and rearwardly to the rear flue which contains a dividing wall I5 spaced from the rear oven wall 36, as shown in Fig. 5, thereby providing a ilue 31. To the rear'of this flue is a second flue 38 bounded by the walls and $9 and having at the top a stove pipe ange constituting the outlet. The products of combustion now downwardly through flue 31 and upwardly through ue 38 and out through the stove pipe and chimney, as long as the damper 4I is closed as in Fig. 5. When the damper is open the gases entering the top of the rear flue rise directly into the Lstove pipe as indicated by the dotted lines in Fig. 1.

Attached to the back of the rear iiue and spaced from the flue wall 3! there is provided a iiue shield 42. This provides an auxiliary duct or iiue 43 into which cold air enters at the bottom, absorbing heat as it rises, and issuing from the top thereof, it serves to heat the room. The shield 42 also serves to protect the room wall behind the stove from the heat. Sometimes protection is afforded in the form of a sheet of metal on the wall at the rear of the range. The

flue shield 42 in the present case may be called a double duty shield in that it performs the double function of protecting the wall and increasing the eiiiciency of the rear iiue as a circulating heater.

The center door I 3, as previously stated, conceals a compartment which is separated from the combustion chamber by a vertical metal wall or partition 44 (see Fig. l). The bottom of this compartment is provided with openings 45 through which cool air enters, which air is warmed and passes out through openings 4i in the rear of the stove, as shown in Fig. 3. This compartment is a very emcient warming oven, for dishes, utensils and other objects usually heated in this manner, being conveniently located and being supplied very effectively with heat from the fire box at the left, the horizontal flue casting immediately above, and the vertical rear ilue.

Another important feature of construction is that the emeiency of the range as a room heater has been greatly 'increased over prior ranges of comparable type in that a much larger area has been provided for radiating heat from the combustion chamber and cooking top. In fact, said area is substantially -double that of the conventional kitchen heater, whichlatter usually radiates heat from one side only; i. e. the

left side. In the improved construction disclosed "herein with a compartment at the right of the fire box, heat is radiated both from the right A'and left of said re box, and the provision of the Ventilating holes referred to, makes the heat effective in warming the room. The rear ue in prior constructions is usually just to the rear of the nre box whereas in the construction described herein said flue is to the right of the rear of the re box and is in fact at the rear of the compartment referred to. As shown in Figs. 1 and 3, this flue 26`does not completely cover the rear wall of said compartment but leaves exposed a narrow vertical area or strip in which the vertical row of openings 46 are located. Thus the rear of the iire box section is not covered by andprotected from radiation by the flue. As a result heat is radiated freely into the room from the rear of said ilre box. 'I'he flue casting 32 above the compartment referred to and underneath the two right hand coal lids 20, 20, provides extra area for the radiation of heat downwardly into said compartment and thence into theroom` by circulation.

Furthermore, the back flue itself adds to the heating capacity and also constitutes a fuel saving feature. The fact that the heated air must travel to the right beneath the coal cooking surface, before it enters the rear flue, insures a greater length of travel for said heated air whereby more of its heat is absorbed by the surrounding walls. 'I'hus the heat loss through the chimney -is reduced.

As previously stated, the warming compartment may have a water reservoir or hot water tank in it. Such tank 50 is shown in Fig. 6 and a front view thereof is shown iny Fig. 7. Water is poured into the tank through the trough 5I near the top thereof and is drawn off through the swivel faucet 52 connected therewith at the bottom. The tank rests on a metal shelf 53 comprising part of a supporting base 54. The top of the tank is covered with heat insulating material 55 and the two sides are also protected by coverings 5I of similar material, located in contact with the tank. An additional heat insulating panel 51 is provided below the tank leaving a clearance space or dead airspace between itself and the supporting shelf 53. Where the water tank insulation is part of a combination range in which electricity supplies the heating units in the right hand half cf said range, an additional electric heating unit 58 may be mounted in the dead air space referred to immediately below the metal support 53 and the tank. This auxiliary heater for the bottom of the reservoir may be a round electric heating unit similar to those used on the cooking top of the range. With such an installation, a water temperature control device 59 is provided and also a water heater switch 60. Where the auxiliary electric heater is not desired, these auxiliary electrical devices are, of course, omitted. In either case, where there is fuel burning on the grate, the water reservoir is heated through contact at the rear end thereof with the ilue wall at the rear of the range, there being no insulation at the rear end of said reservoir. I'he ilre box compartment immediately to the left of the reservoir would supply considerable heat to an uninsulated reservoir and the horizontal ilue casting above the same would also supply considerable heat, with the result that, under certain. conditions, an excess of heat would be available. Therefore, the heat insulating covering just described is desirable and the reservoir heats very efficiently through its rear end contact and also holds its heat much longer i. e. when the heat supply is reduced, than would otherwise be the case.

The Water tank may be installed initially when the range is being assembled or it may be sold later as auxiliary equipment, to be installed by the purchaser. In making the installation the reservoir is pushed back into contact .with the rear wall of the range and held by any suitable device-such as the small steel angle 6|. A water tank equipped with an auxiliary electric-heating unit can also be installed by the purchaser of the range or preferablylby an electrician.

The advantages of the combination range as a. whole include the following:

The design is such as to provide four coal-wood cooking plates on the surface, whereas the conventional kitchen heater provides only two. Not only is a larger cooking top secured but a balanced arrangement of four cooking lids and four gas burners or four electric burners'. The rear ue is located at the rear to the right of the coalwood section, thus bringing the stove pipe closer to the center of the range, this central location being emphasized by the splasher, mantle back, and shelf, not shown herein. The front of the range is also balanced by virtue of the door arrangement previously referred to. The two coalwood lids in the right hand row are amply heated due to the crcutous travel of the products of combustion beneath the same. The eiiiciency of the range as a room heater has been greatly increased. 'I'he construction of the back flue insures additional heating capacity and economy of fuel. The rear wall or double duty shield also provides an additional ue within which the ascending air is heated, further increasing the eiciency from this standpoint. The reservoir heats very e'iciently and holds its heat much longer than the ordinary uninsulated reservoir.

I claim:

A range having a re box chamber at one side. a compartment at the side of said re box chamber, a substantially horizontal flue casting at the top of said compartment, a vertical down draft flue against the outer surface of the rear wall of said range and covering the area immediately behind said compartment except for a narrow, vertical, uncovered portion thereof, said horizontal ue providing communication between said flre box chamber and said vertical rear flue whereby said compartment is heated from the side, the top, and the rear,vthe' bottom wall of said compartment having openings therein and said narrow, vertical portion also having openings therein, whereby air may circulate through said compartment and serve to heat the surrounding outside air. f

HERBERT T. BURROW.

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