US1339478A - Range - Google Patents

Description

H. n. SCH-ALL.

` RANGE, APPLlc/Tlorg 'FILED 'NQv. 3o, 1917.

.Patented May 11, 1920..v

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H. D. SCHALL.

RANGE.`

APPLICATION FILED NOV. 30, 1917.

Patented May 11,1920-,

O60? e y Jim?? Soia?) UNITED STATES PATENT OF l HENRY D. seHALL, onnnrrnorr, MICHIGAN, nssIGNon ro nnrnor'r srovis wezens,` or

l DETROIT, MICHIGAN, A .CORPORATION or ivirenrenivf.v y

- Specification of Letters Patent. frateted May 11 1920 Application led November 30,1917?. Serial No. 204,533.

its broader aspects is not limited to the type of heating apparatus mentioned*v 4 Among the' objects of the invention are to provide 'a' new andvimprove'd construction whereby the `stove top` comprises sections having different' vdegrees ofheat so that one section can be used for cooking at high temperature, another at a lower temperature and preferably another at a still lower temperature for warming purposes; to .provide al construction wherein the' burners are constructed and arranged to operate, substan tially as Bunsen burners andV with the flame cone 'terminating just below the top section, which has the greatest degree of heat; to provide ribs or other suitable supporting members on the'burner block for supporting the top plate so that the supportsl for the latter cannot be burned out. .l

`The invention also resides in the novel construetlon of the oven section and its ar-l rangement withrelation to the top section; inet-he construction of the joints between the various insulatoi` sect'ons of theoyen so that dissipation ofheatis prevented; ,in the provision of a baille on the top, wall of the oven which also serves as a support 'for the .top plate; inthe arrangement of this baie and the graduated .passage betweenk the top' wall 'of thewovenand the vtop `plate sol as 'to produce an eveny distribution ofthe heat and conserve the struction of thev ovenliioor: or pani; and in such other features of construction and arrangements andy (':olnbinations.l `of parts as 'will moreffullv hereinafter', ppear. Y

p In the drawingsa-` y 1 sa vertical, Se onall? View iemb'odyingmv invention ff the construe Le s .tplp plan-viewo ig. 1;. Y'

plate.

ymanner similar te the welllmown burner. This construction has therurther heatjunits.;l in the 'novel con- Fig. 4 is a vertical sectional view on the linea-4 of Fig. 1;

Fig. 5 is an enlarged perspective viewof one of the burner blocks;

Fig. 6' is a perspective view of the oven Describing in detail. the construction shown in the drawings, A designates a ranve having an open-top plate B and an oven the latter being positioned beneath one part of the top plate. For supplying heat t0 the top plate l preferably employ a plurality of burners which extend upwardly from supply pipes D', the supply of gas to which is controlled by suitable shut-off valves D2. These valves are preferably located in a line at the front of the stove and 'control the supply from the main pipe or feed line D3.

As shown in Fig. 1 the top plate B is formed in three sections B', B2 and B3 which are supported at their edges in grooves or seats E formed in the top flange l lof the body which latter may be formed of sheet-metal or other suitable construction.

For retaining the heat in close proximity to' the top plate and preventing its dissipation below the plane of the burners, l enaploy a burnerbloelr F of suitable refractory material, which block isprovided with ver .tical openings l?" through which the burners D extend. It will be vnoticed that the open ings are of a sufficiently greater diameter than the burner to permit of a surrounding air passage through which the air freni, the chamber@ is' supplied to the hij ser inv a.

lunsen advantage, in vthat they air in passing upward around the burner tends to extract section Bf while thehet gases of combustion will then pass from ,the A:ehannbn below-fthe section B tothechamberbelow the section B2 and froinfA here, to. thet'chamber helow' v`:the sectionsB?. Thefeharnbers below "the toward the back so 'more restricted'as sections B'iandf tapery that the gas .passagep heatltherefrom and .thus cool the burner pipes it nears the flue or outlet G. This tapering passage is produced by valiying the thickness of the insulating blocks and H forming the top of the oven, andto facilitate the even distribution of heat these blocks are also provided with diagonally-extending dellecting flanges or ribs I. The-latter extend upwardly from the sections'H and H and serve both to compel the gases to travel throughout substantially the entire area of the sections B2 and B3 and also serve as a support for these open-top sections.

As shown in Fig. 2 ,the ribs I and I are preferably spaced at one end from the side walls of the range so as to permit part of .the gas to go on oneside while dellecting a predetermined portion toward the other side of the range. The insulating block F is also provided with supporting ribs or projections F2 which serve to support the section B of the top plate. Thus the entire lto plate is supported not only by the ledge but also by the ribs or flanges formed on the refractory blocks, which being indef structible by heat form a permanent support for the top plate.

While the heat to the various sections of the top plate can be varied to suit the temperatures desired, it has been found possible with a range of this kind to maintain the front section B at about 1300o F., the center section B2 at S50o F. and the rear section B3 at about 500 F. IVhen these high temperatures are reached the stack temperature is only about Q00O these temperatures, of course. being simply illustrative. Also the novel arrangement of the passageways and the battles beneath the sections B2 and B3 allows all the heat units to be advantageously employed.

`Referring now in detail to the oven con: struction. it will be noticed that the side walls and bottom sections J. J and J2 are formed of heat-insulating blocks which are preferably iliade in sections having interlocking joints K. This not only facilitates the assembling of the range but the particular construction of the joint prevents the waste of heat from the oven in the following manner: Each of the joints is formed with an upper horizontal portion K, a lower horizontal portion K2 and a vertical connecting portion K. In each case the blocks are so arranged thatthe lower horizontal portion is at the outside of the wall; Therefore in attempting to escape through the joints the heated air will be compelled to pass downward through the vertical portion K3 in order to escape. As the tendency of the heated gas is yto rise. this particular construct-ion of joint will. to a material extent, prevent the escape of the heated air from the oven. The same stepped joint construction is also employed in the insulator blocks surrounding the burner section. Another feature of the oven construction resides in the formation of a supporting pan M which is located above the oven burners X. As shown in Fig. 6 the oven plate )I is formed with inverted U-shaped ribs 0 which are spaced apart and the intermediate portions 0 perforated at O2.

This construction not only eliminates the danger of burning the article in the oven but also provides greater radiating surface, and the perforations permit of the `free circulation of the air.4 further feature that increases the efficiency of the range is the enameling ofthe refractory material of the blocks F,H and H so as to obtain better deflection of the heat.

While I have shown and described the invention in connection with a construction wherein the openings through the refractory lblock F are vertically.arrangetl, the invention is not necessar1ly limited to such a structure, as it would be possible to modify the construction so as to have laterally arranged air passages, and various other changes could be made in the details of construction and arrangements and combinations of parts without departing from the scope of my invention. i

lVhat I claim as my invention is 1. In a range, the combination with a top plate and an insulator block spaced beneath said plate, formed with a plurality ofopenings. of burners respectively positioned in said openings and spaced from the walls thereof to form restricted air passages,said burners discharging against said top plate.

2. In a range, the combination with adjacent top plates and an insulator block spaced beneath one of said plates formed with a plurality .of openings and with substantially parallel ribs supporting the overlying plate and deflecting products of combustion toward the adjacent top plate and burners respectively positioned in said openings and spaced frm the walls thereof to form restricted air passages. said burners discharging against the overlying top plate.

3. In a. range, the 'combination with a to plate. of a refractory block positioned beneath the top plate, a plurality of burners projecting through the refractory block and discharging against the top v plate to directly heat the same. the uppei surface ofsaid refractory block being enameled to further heat the top plate by reflected radiation.

4. In a range. the combination with a top plate, of a refractory block positioned beneath the top plate. a plurality of burners projecting through the refractory block, the upper surface of said refractory block being enameled to further deflect the heat .from said burners toward the top plate, and an oven positioned beneath the rear portion of the top plate and having a top refractory wail similarly enameled for deiecting heat toward the top platen In a range, the combination with. a re fractory block, of .a plurality of burners arranged to produce heat at the top of the block7 an oven having a top Wall formed of refractory material, the upper surface of which Wall is located above thelplane of the top surface of the refractory bloei;7 and a substantially horizontal top plate spaced above said burners and oven and forming with the oven a passage for the products oi' combustion freni the burners.

6, ln a range, the combination with a refractory block of' a plurality of burners arranged to produce heat at the top of the block, an oven having a top Wall ,ormedot refractory material, the upper surface of which Wallis located above the plane of the top surface of the refractory block, and a substantially horizontal top piate spaced above the burners and oven, the topk Wall oi' theoven being inclined upwardly to gradu ally reduce the passage through which the hot gases can pass.

7. In a range, the combination with a frame, a top plate carried thereby, burners positioned beneath the top plate, an insulator block also positioned beneath the top plate and carried by said frame, said insulator block having projecting ribs forming a support for the top plate.

8 .in a range, the combination with a top plate, of a refractory block positioned beneath a portion of the top plate, burners extending through said block, a supply pipe :tor the burners located beneath the block, said block having a passageway through which air from the portion beneath the block is permitted to pass around the burners and toward the iame end thereof to produce a Bunsen burner effect.

tending around each of the-burners and the oven.

10. In a range, the combination with a top plate, of an oven positioned beneath a portion of said plate, gas burners posi-- tioned beneath a diii'erent portion of the top piate, and heat insulating blocks en# tending around the oven and partially forining the outside wall of the range.

In testimony whereof affix my signature.

HENRY D. SCHALL.

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