US1726687A - Stove - Google Patents

Description

L. T. WILCOX Sept. 3,1929.

STOVE F'ilel Feb. 25, 1927 4 SheetsSheet l INVENTOR Jill A5 T lV/ZC'OX. BY

ATTORNEY Sept. 3, 1929.

| T. WILCOX 1,726,687

STOVE Filed Feb. 25, 1927 4 Sheets-Sheet 2 INVENTOR. 15/4 4577. MLC'OX ATTORNEY.

L. T. WILCOX Sept. 3, 1929.

S T'OVE 4 Sheets-Sheet 3 Filed Feb; 25, 1927 INVENTOR. 15w 2 lmmx ATTORNEY.

L T. WlLCOX Sept. 3, 1929.

STOVE Filed Feb. 25, 1927 4 Sheets-Sheet 4 INV 1M5 T MZCp/K ATTORNEY.

Patented Sept. 3, 1929.

UNITED STATES LEWIS 'l. WILCOX, F PEEKSKILL, NEW YORK.

STOVE.

Application filed. February 25, 1927.

It has been found advantageous and practical in oil and gas burning cooking stoves,

in addition to the holes in the stove top where the heat from the burners is directly applied, to have other holes where articles are heated more indirectly. Under such circumstances two articles may be cooked at the same time with a single burner, the article requiring the greater heat being placed on the hole which receives the direct heat of the burner. This invention relates to stoves of that type and an object is to provide a stove which will be simple and inexpensive to manufacture and which will be of higher efiiciency in f its application of the heat from the burners to the contents of the cooking utensils on the holes than has heretofore been possible with stoves of this type. Other more specific objects will appear from the description of'the illustrated embodiment of my invention.

in stoves of this type, the holes in the key plate or stove top are commonly arranged in pairs, and for each pair there is a burner arranged underneath one of the openings, usually the front opening, and from there a heat collector conducts the hot gases comprising the combustion products to the other opening of that pair of openings. The difliculty has been to get a suflicient application of the directly to the utensil on the first opening where quick heat is desired, and at the same time to get sufficient heat applied to the utensil on the second or remote opening to serve even for the slower cooking operation on that hole.

My stove is more efficient in these respects than any of which I have known. I have, in accordance with this invention, provided such an arrangement that the hot gases from .the burner come first into direct contact with the utensil on the first cooking hole and then pass rapidly and freely into mostefiicient heating contact with the cooking utensil on the second hole. There is, therefore, a minimum amount of loss of heat in the gases from their transit to the second utensil.

This result is effected by several features of construction acting conjointly. One of the important things in the combination is the construction of grate which I employ on the second opening, which is so designed and proportioned as to cause just the proper amount of draught and also to direct the gases most effectively in contact with its cooking utensil. Another feature which con tributes largely to the desired result is the Serial No. 170,756.

particular shape of the heat collector which spans the two cooking holes and which, in conjunction with the stove top or key plate, forms a conductor for the heated gases, such that they may have the application and may travel in the manner above stated.

Another and an important advantage of my invention is the fact that embodiments thereof are adapted to have their parts stamped from sheet metal. In addition to the frame parts which may thus be composed of sheet metal, it is possible, and, in fact, preferable, to draw the parts of the stove top from sheet metal. These latter may comprise the top frame and the key plate, which has a down-turned flange and tits flush within the opening of the top frame, resting upon aninturned flange of the frame. The heat collector may be a sheet metal member more or less approximating the shape of a tray and screwed or otherwise secured to the under face of the key plate. The heat col lector is deepest at its center, the bottom sloping from each end downwardly toward the center and there being an opening in the sloping bottom portion in register with the first cooking hole and the burner being disposed in or directly beneath this opening.

In order to induce the proper draught, a grate is provided in the remote cooking hole which holds the cooking utensil elevated and which is so constructed and shaped as to direct the gases most efiectively in contact with the cooking utensil on the grate. The first cooking hole must, of course, be covered either with a cooking utensil or with a lid, in order to direct the gases to the second hole. The heat collector is constricted in Width at its center and the two ends are rounded. The gases are thus desirably directed without impeding their flow.

Other features of my invention will appear from the following description. I shall now describe the illustrated embodiment of my invention and shall thereafter point out the invention in claims.

A more detailed description will be given in connection with the drawings in which:

Fig. 1 is a front elevation partly in section of a stove constructed in accordance with this invention;

Fig. 2 is a section on line 22 of Fig. 1;

Fig. 3 is a plan view of one burner section of a stove;

Fig. 4 is a section on line lg-*4: of Fl 0' 2' u a u n I a Flg. 5 1s a section on lme 5-5 of Fig Fig. 6 is a plan view of a simplified form of stove, and

Fig. 7 is a longitudinal section through the top portion of a stove constructed in accordance with Fig. 6.

The stove shown by way of illustration consists of a top frame 1 supported on legs 2, which are braced at the center by a burner base 3 and at the lower end by a leg tray 1. A battery of burners 5 are secured in line along the front of the stove to a feed pipe 6 which connects to the usual inverted supply bottle 7, supported from the end of the stove by a bracket 8. i

Each burner has associated therewith a key plate 9 which extends the full depth of the stove top frame and seats on a ledge 10 in the frame opening so as to be flush with the top surface of the frame. Each key plate'has two grate holes or openings therein, one front and one rear, over which a vessel may be placed. The key plates may be stamped from sheet steel and when so stamped a ledge 11 is formed around the periphery of the two grate openings adapted to receive therein a grate. The key plates are also formed with a depending flange 11 whichtends to stiffen the key plate as well as position said plate so as to lie flush with the stove top.

A flush grate 12 is preferably used in the front opening which will allow the vessel placed thereorer to sit flat upon the surface of the key plate and close the front opening or a solid disk grate may be used for reasons to be later described.

A special grate 13 such as disclosed in my application Serial No. 169,444, filed February 19, 1927, issued November 15, 1927, as Patent No. 1,649,006, is preferably used in the rear opening. This grate will support a vessel above the surface of the key plate and will also serve in combination with the other elements. to direct the heat in predetermined channels. This grate comprises generally a disk shape member 13 having an open center portion, closed side portions 14, with said side portions 14 terminating in vertical battle webs 15. Vertical vanes 16 are formed across the center opening in the grate parallel to webs 15; A rear bafl'le wall 17 surrounds the rear periphery of the grate. The webs 15 and vanes 16 extend above and below the horizontal surface of the grate and are serrated upon their upper edges which edges serve as a support for a vessel placed thereupon. A lug 17- may be formed projecting downwardly from the rear wall 17 or any other portion of the grate, which lug may fit into a recess in the key plate to insure a proper positioning at all times of the grate member.

Attached to the under side of each key plate 9 by means of screws or the like is a particular form of heat collector 18 shown and described in Patent No. 1,64,51,00? issued November 15, 1927 in my name.

The heat collector comprises generally a dish-shaped tray 18 having a plane top in the form of a horizontal flange 19 of varying width. The bottom 20 of the collector slopes downwardly from each end toward the center. Each end of the tray is in the form of a somewhat circular chamber 21, the chambers 21 at the ends of the collector being joined by a narrowed passage 22 through the deepened center portion of the collector. The front chamber 21. has a circular opening through its bottom located directly over the top of the burner so that heat generated from the burner will rise and flow into the collector. The chamber 21 at the front end of the collector is not a true circle but widens out at the sides, being of progressively greater radius toward the rear to permit the conducting of larger quantities of the heated products of combustion which will be termed heat without compression. The outer periphery of the collector is bent sharply downward to form a stiffening lla'igc n3 which serves to prevent buckling of the collector when subjected to intense heat. It is to be noted that with collector 18 secured to key plate 9 and with a vessel or solid disk grate over the front grate opening in the plate, a substantially closed duct s formed for conducting the heat to the rear grain opening in the key plate. The inclination of the front portion of the botton'l wall of the collector is such that there a slight clear ance or opening between the upper front edge of the burner and the underside of the front edge of the opening through the collector. This clearance will permit any gases occasioned by a flare-back to escape therethrough without passing up through the collector and rear grate.

In Figs. 6 and 7 there is shown a stove o'l much simpler construction than that shown in Figs. 1 to 5. In the structure shown in these figures there is no key plate structure but in place thereof the stove top 9 is made of a continuous or a unitary sheet of stamped sheet metal. with a peripherally depending llangc which serves to strengthen and stiffen the unitary top. The top 9 has also formed therein a plurality of pairs of cooking openings, each pair being associated with a heat collector 18 similar to that previously dcscribed in detail and which is secured to the stove top by screws or the like. The stove top 'ith its associated heat collectors sccurcd thereto is supported in the usual manner by legs 2, and a burner 5 is associated with one heat collector and a pair of cooking holes.

It is apparent that with this structure a much simpler stove formed, use being made of my heat collector stamped sheet metal stove top.

This sheet metal top is formed Sill Jon

.in the key plate or into contact with a closed grate thereover. The heat is thereby deflected and, due to the draught created by the raised rear grate, will flow toward the rear opening. This flow is rapid and unimpeded due to the rounded contour of the front chamber 21, and the increaslng size of the chamber. The heat thus collected will pass through the narrowed but unrestricted center passage in the collector, where its mean level will be lowered due to the downwardly inclinedbottom wall, and into the rear chamber of the heat collector where it will be deflected upwardly by the upwardly inclined bottom wall and through the rear grate. i i

The serrated battle webs, vanes and side portions of the rear grate will distribute the heat over the bottom of the vessel placed thereover, and the rear baflie wall of the grate will deflect that portion of the heat which is traveling rearwardly and redirect it forwardly again over the bottom of the vessel.

I It follows therefore that full utilization of the heat generated is attained by reason of its collection] and distribution and it is to be I noted that substantially all ofthe generated heat is collected, applied, and reapplied to the vessels and the maximum amount thereof is absorbed and utilized. I

It is obvious that various changes may be made in the details'of structure without departing from the spirit and S00 e of this invention as defined in the appen 'ed claims.

I claimz' 1. In an oil stove, an oil burner, a key-plate supported thereover having therein a plurality of cooking openings, and mean'sfor con ducting the products of combustion from said burner to said openings'an-d for inducing a flow comprising a heat collector disposed under said key-plate forming a substantially closed duct communicating at one end with said burner and at the other end with one of said cooking openings, the bottom wall of said collector sloping downwardly from each end toward the center portion of said duct.

2. In an oil stove, an oil burner, a key-plate supported thereover having therein a front and a rear cooking opening, and means for conducting the heat from said burner to said openings and for lowering the mean level thereof during a portion of its passage to induce a flow comprising a heat collector disposed under said key-plate forming a substantially closed duct having a chamber in the front end thereof communicating with said burner, said front chamber being larger at its mid point and having a. downwardly sloping bottom, said duct also having a rear chamber in the rear end thereof having an inclined bottom sloping downwardly toward the center of said collector, and a narrowed but unrestricted center passage connecting said chambers.

3. In anoil stove, an oil burner, a keyplate supported thereover, having therein a cooking opening over said burner and a cooking opening remotely situated with respect to saidburn-er, a heat collector disposed below said key-plate forming a substantially closed duct communicating with said burner and said openings, a flush grate positioned over the opening over said burner, a raised grate positioned over the other of said openings, means carried by said grate for distributing the heat over its associated cooking opening, and additional means carried thereby for defleeting the heat in a reversed direction across its associated cooking opening.

4:. In an oil stove, an oil burner, a key-plate supported thereover, having therein a cooking opening over said burner and a cooking opening remotely situated from said burner, a heat collector disposedbelow said key-plate forming a substantially closed duct communicating with said burner and said openings, said duct having a bottom wall sloping downwardly from each end toward the center, a flush grate over said cooking opening over said burner, araised grate over said remote opening, and means for reversing the normal flow of heat back across said remote opening.

5. In an oil stove, an oil burner, a key-plate supported thereover, having therein two cooking openings, one substantially over said burner and the other remotely situated therefrom, a tray-like heat collector disposed below said key-plate having a bottom wall sloping downwardly from each end toward the center and having a substantially circular chamber in each end j oined'by a transversely narrowed passage through the center portion, a flush grate over'said cooking opening over the burner, and a raised grateover said remote opening whereby a draught is induced through said duct.

6. In an oil stove, an oil burner, a key-plate supported thereover, having therein two cooking openings, one substantially over said burner and the other remotely situated therefrom, a tray-like heat collector disposed below said key-plate having a bottom wall sloping downwardly from each end toward the center and having a substantially circular chamber in each end oined by a transversely narrowed passage through the center portion, a flush grate in said cooking opening over the burner, and a raised grate in said remote opening whereby a draught is induced through said duct, said latter grate carrying baflie vanes for distributing the heat.

7. In an oil stove, an oil burner, a keyllf) plate supported thereover, having therein two cooking openings, one substantially over said burner and the other remotely situated therefrom, a tray-like heat collector disposed below said key-plate having a bottom wall sloping downwardly fromeach end toward the center and having a substantially circular chamber in each end joined by a transversely narrowed passage through the center portion, a flush grate in said cooking opening over the burner, and a raised grate in said remote opening whereby a draught is induced through said duct, said latter grate carrying baffle vanes for distributing the heat and a battle wall for reversing the direction of flow of the heat back over said remote openin 8. In an oil stove, an oil burner, a keyplate supported thereover, having therein a plurality of cooking openings, and means for conducting the products of combustion from said burner to said openings and for inducing a flow comprising a heat collector disposed below said key-plate and in contact with said key-plate and forming a substantially closed duct communicating with saidburner at one end thereof and with one of said cooking openings at the other end thereof, the bottom wall of said collector being inclined downwardly from each end toward the center portion of the duct and the side walls of the duct converging at said center portion.

9. In an oil stove, a top frame having an inner channel, an oil burner, a key-plate supported thereover seating in said channel and having a cooking opening therein over said burner and a second cooking opening remote from said burner, said plate being formed of sheet metal and having an angularly bent strengthening flange around the outer periphery thereof adapted to engage in said channel in said frame and position said keyplate, a depressed flange around the peripheries of said openings, and a heat collector disposed below said key-plate forming a substantially closed duct communicating with said burner and said openings.

10. In an oil stove, a top frame having an inner channel, an oil burner, a key-plate supported thereover seating in said channel and having a cooking opening therein over said burner and a second cooking opening remote from said burner, said plate being formed of sheet metal and having an angularly bent strengthening flange around the outer periphery thereof adapted to engage in said channel in said frame and position said key-plate, a depressed flange around the peripheries of said openings, and means for conducting the products of combustion from said burner to said openings and for inducing a flow C0111- prising a heat collector disposed below said key-plate forming a substantially closed duct communicating with said burner and said openings, the bottom wall of said collector sloping downwardly from each end toward the center of said duct.

11. In an oil stove, a top frame having an inner channel, an oil burner, a key-plate supported thereover seating in said channel and having a cooking opening therein over said burner and a second cooking opening remote from said burner, said plate being formed of sheet metal and having an angularly bent strengthening flange around the outer periphery thereof adapted to engage in said channel in said frame and position said key-plate, a depressed flange around the peripheries of said openings, and means for conducting the products of combustion from said burner to said openings and for inducing a flow comprising a heat collector disposed below said key-plate forming a substantially closed duct communicating with said burner and said openings, the bottom wall of said collector sloping downwardly from each end toward the center of said duct and the side walls of the duct converging at said centcr portion.

In witness whereof, I hereunto subscribe my signature.

LEWIS 'r. WILCOX.

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