US1409679A

US1409679A - Stove

Info

Publication number: US1409679A
Authority: US
Publication date: 1922-03-14
Anticipated expiration: 1939-03-14

Description

J. H. DEAN.'

STOVE.

APPLICATION FILED Nov.15. 1920.

1,409,679. Patented Mar. 14,1922'u lllllllll- Wink UNITEDd sTATEs JAMES H. DEAN, or CHICAGO, ILLINOIS.

srovn.

l Specification of Letters Patent.

Patented Mar. 14, 1922.

Application led November 15, 1929. Serial No. 424,020.

T0 all whom t may concern.'

Be it known that I, 'Jarras H. DEAN, a citizen of the United States, residing at Chicago, in the-county of Cook and State of Illinois, have invented certain new and useful Improvements in Stoves, of which I do declare the following to be a full, clear7 and eXact description, reference being had to the accompanying drawing, forming a part 'of this specification.

' The present invention has relation more particularly to that class of stoves known as hot blast77 stoves, and the invention consists-in the features of novelty hereinafter described, illustrated in the accompanying drawing and particularly pointed kout in the claims at the end of this specification.

Figure l is a view in central vertical scction through a stove embodying my inven tion. Figure 2 is a sectional view of a portion of the stove, the view being taken on the line 2-2 of Fig. 1.

In the drawing, A designates the base or lower portion ofthe stove, this portion consisting preferably of a casting divided by the transverse plate 5. That part of the base portion A beneath the plate 5 consti` tutes the ash pit at the frontv of which there is a door 6 mounted upon hinges 7 and provided with suitable air admission openings controlled by a revoluble valve 8 of familiar construction. The transverse plate 5 is formed with a central opening above which is setv the fire potv B having at its bottom a grate @,this lire pot being arranged within the upper chamber 9 of the lower portion of the stove. In the front of the chamber 9 is formed an opening infront of vwhich there is a door l0 mounted upon hinges 1l,V and this door is preferably formed with openings that are controlled by a pivoted valve l2 of familiar construction. The base portion of the stove is shown as having formed'integral therewith an elbow 14 to which is connected the lower end ofa smoke flue D.

The lire pot B which is preferably a'casting of a truncated conical-shape, is smaller in diameter than the diameter of the upper chamber 9 of the stove base wherein it is aranged and upon the upper edge of the stove bas'e'A is mounted a rim E having a conical fuel-deflecting surface .l5 and depending lugs 16 the shoulder portions i7 of which rest upon the edge of the top of the base portion A. vPreferably, there are four of .these lugs 16 spaced at intervals around the rim E. The space between the top of the fire pot B and the lower portion of the rim E and the space between the fire pot and the outer wall of the upper portion of the base A afford a passageway for products of combustion to pass therethrough from'the fire pot into the chamber 9 of the base A and thence by the elbow 14 into the smoke flue D.

The chamber 9 of the upper portion of the base A and the rim E are encircled by the lower portion of the body casing F of the stove that is. preferably formed ,of sheet metal. In the front of this casing F is Vformed an opening normally closed by a door 1S mounted upon hinges 19.

Across the top of the casing F extends a top plate G; that is preferably formed of cast metal having a depending flange united by rivets 20 to the top of the casting F. Preferably, there is formed integrally with this top plate G a pipe section lr that forms part of the smoke flue D and this section extends both above and below the top plate G. The part of the section G depending below the top plate Gr is provided with an opening 22 that is arranged opposite a similar opening formed in the upper part of the casing F at its back. The part ofthe line section G that rises above the top plate (l is formed with an opening 23 to the atmosphere. The openings 22 and 23 are controlled by a single valve I-I that is preferably arranged within the line section Gr and the flue section G may be rectangular in section or the wall of the flue section against which this valve H is placed may be flattened to permit the valveV to be turned. As shown, the valve H is formed with a tubular sleeve 25 through wl 'ch passes a shaft 26 having at its outer endY a handle 27 whereby the valve H may be turned. i The sleeve is connected by a cotter pin 25a to the shaft 26 and the inner end of this sha-ft 26 is journaled in a seat 26a. The valve II is formed with a single opening 29` that may be brought into register to a greater or less extent with either of the openings or Q3 to thereby regulate the flow through one of said openings and close the otherr` or the valve may be positioned to close both openings.

lllithin the casing F is mounted an openended het blast pipe the purpose of which is to conduct air mingled with the light and unconsumed gases from the upper portion of the casing F down on to the bed of fuel.

il In the preferred embodiment of my invention, the hot blast pipe consists of a tubular casting K that is suspended from the top plate Gr and extends over the combustion chamber or casing F of the stove. As shown,

the top plate G is formed with a central Y opening havinga depending angular flange whereon rests a iiange 3l formedat the top of the hot blast pipe K. The top of the hot'blast pipe K is shown as formed witha plurality of openings 32 and von the top of thepipe K is mounted a valve K that is pivoted,'as at 33, to the top of the pipe K. This valve K is formed with openings corresponding with the openings 82 in the top of the pipe K and these openings serve to admit air into thetop of the pipe. At a short'distance below the top of the pipe K through. rlhe air passing through the pipeY there are formed a plurality of openings 35 for the admission to the pipe of the light and unconsumed gases that rise to the top of the combustion chamber wherein the pipe K isv suspended.y Preferably, the pipe K is formed with lugs or offsets 36and the openings or ports 35' extend from the upperv portionsv of these lugs or off-sets and are inclined inwardly and downwardly thereof which lies in a horizontal plane extend- Y through plate.v

the valve H Vinthe iiue section ing through the lower'end of the pipe. This form gives a venturi effect and aids in eifectively drawing in the combustible gases the inclined openings or ports 35i. An a vantage incident to suspending the pipe K from the top plate G is that the'pipe K can be readily removed and replaced by withdrawing it from the opening in the top From the foregoing description, theo eration of my improved stove `will be un erstood to be as follows: When a fire is laid upon the grate C of theiire pot B, the valve K at'the top of the 'hot blast pie K and willrbe in closed position and the valve S at the front ofthe Vash pit chamber of the stove base A will be opened. Products of com- Y bustion will then pass from the fire pot and from the combustion chamber of the casing F in the direction of the arrows Figs. 1 and 2 of the smoke flue D. After the fire has been started.I the iiue K at the top of the hot blast .pipe K will be turned more or less to admit air through the openings 82 and the air thus admitted will pass downwardly through the hot blast pipe' K and betweenthe upperv'edge ofthe fire pot B and the upper part ofthe base Afinto the chamber 9 within which the ifire pot is located andwill pass thence YVthrough 'the elbow Y .14 to the smolre'lue In Vthis passage of the products of combustion throughv the chamber 9, the fire pot- B andthe .fuel contained thereinwill be fintensely heated .and the effective burning of the'fuel will be thereby greatly facilitated. It will be understood, ofcourse,fthat after the fire has been started, the valve 8 inthe ash V.pit may be closed moregor less. By means of the valve K, the amount of air admitted to the hotblast pipe K can beaccurately regulated Vand theintensity of the down blast through this pipe can thereby'be controlled.

It should be noted that the hot blast pipe has a discharge outletrat its lower end only which opens into the lower portion of the` combustion chamber in-,proximity with the fuel bed and that. it is provided onlyv in the vicinity of the upper Vportion of the combustion chamber with inlet ports or passages through which'any light unconsumed gases are drawn by the'blast of heated air passing through the pipe, these. gases being mixed with the air and so delivered into the zone off greatest heat inthe lower por# tion of thecombustion chamber and so effectively consumedi. rl `heV arrangementY is particularly of advantage for .theV Veffectiver consumption of the gases given Voil from bituminous coal. After all of the gases have been driven off from such coal Vand it isthoroughly coked, the hotblast pipe is preferably closed andthe airnecessary for 'combustion admitted from theash-'pitrbe- Thevalve H within the low the lire-box. smoke flue section G hasV atwo-fold purpose. VVhen lthis valve is in the position indicated in Fig. 1 vof the drawing,atmos phcric air will be admitted lto the smoke flue D, thereby serving to check the draft. lVhen, however, fuel'is being delivered .to

the stove through the doorlS ofthe Ycombustion chamber or casing'F, the valve H should be turned so as to bring its opening 29 opposite the opening 22 in theupper part of the combustion chamber and thus prevent any out-puffing fof they-gases or products of combustion from the casing F through thedoor while fuelis being delivered to the stove. u

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is u ,jj

'l'. A stove'of the character described comprising aI combustion chamber having a top plate, a smoke pipe having a 'section extending above Vand -below said top plate and provided above said top plate with an opening communicating with the atmosphere and below said top plate with an opening communicating with the combustion cham'- ber,'and a single valve for controlling said openings and adapted to close one of said openings and regulate the fiow through the other or to close both of said openings.

2. A stove of the character described comprising a combustion chamber having a top plate, a smoke pipe having a section extending above and below said top plate and provided above said plate with an opening communicating with the atmosphere and below said plate with an opening communicating with the combustion chamber, and a valve provided with a single opening adapted to be brought opposite either of said openings in said smoke pipe section.

3. A stove of the character described comprising a combustion chamber having a top plate, a smoke pipe provided above said top plate with an opening communicating with the atmosphere and belowT said top plate with an opening communicating with the combustion chamber, a valve pivotally mounted within said smoke pipe, and a handle arranged outside said smoke pipe and connected to said valve whereby it may be shifted to close either or both of said openin s.

(di. A stove of the character described comprising a combustion chamber, a top plate, a smoke pipe section formed integral with said top plate and extending above and below said top plate and provided above said plate with an opening communicating with the atmosphere and below said plate with an opening connecting with the combustion chamber, and a single valve arranged within said pipe section for controlling said openings whereby the extent of either of said openings may be modified or both may be closed.

5. A stove comprising a fire-pot, a combustion chamber above the same, and a hot blast pipe in communication at its upper end with an air inlet and extending downwardly in said combustion chamber, said pipe having a discharge outlet at its .lower end only opening into the lower portion of said combustion chamber and also having portions through which gases are drawn Vfrom the upper portion of the combustion chamber and caused to pass with the air through said pipe.

v 6. stove of the character vdescribed comprising aire-pot, an enclosing casin form- ',ing a 'combustion chamber above the re'pot,

a 'centralhot blast pipe'communicating at its upper end with an air inlet and extending .downwardly in said combustion chamber, said pipe having a discharge opening at its lower Vend only opening intol the lower` portion f said lcombustion chamber, and said pipe having ports, for admittinggases into the body of air passing therethrough from thel upper portion only of the combustion chamber.

7. A stove of the character described comprising a fire-pot, a combustion chamber above the fire-pot having a top plate with an opening therein for the admission of air, a valve for controlling said opening and a hot blast pipe extending downwardly from said opening and having a discharge outlet at its lower end only opening into the lower portion of said combustion chamber, said pipe being provided only adjacent its upper inlet end with ports whereby light gases may be drawn from the upper portion of the combustion chamber and caused to pass with the air down through said pipe.

8. A stove comprising a fire-pot, a coinbustion chamber above the lire-pot, a smoke flue communicating with the lower portion of the combustion chamber and a hot blast pipe communicating at its upper end with an air inlet, extending downwardly through the combustion chamber and having a discharge outlet at its lower end only at the lower portion of the combustion chamber, said pipe having ports through which light gases may be drawn from the upper portion of the combustion chamber and caused to pass with the air down through said pipe.

9. A stove of the character described comprising a fire-pot, a casing around said firepot and extending above the same to form a combustion chamber, said fire-pot being spaced from said casing to a'ord an exit for the products of combustion from the lower portion of the combustion chamber, a smoke iiue leading from the space about the fire-pot and a hot blast pipe communicating at its upper end with an air inlet, extending downwardly through the combustion chamber and having a discharge outlet opening into the lower portion of the combustion chamber in proximity with the fuel bed, said pipe having ports leading from the upper portion of the combustion chamber for the admission of gases therefrom into the air passing through the pipe.

10. A stove of the character described comprising a fire pot and a combustion chamber above said lire pot having an opening in its upper portion for the admission of air, and a hot blast pipe extending downwardly from said opening, said blast pipe being provided with downwardly and inwardly inclined ducts or openings whereby ing into the lower portionof the combuslight gases maybe admitted from the comtion chamber, said pipe gradually decreasbustion chamber and be caused to pass with ing in erosssection from its upper to its the air down through said hot blast pipe. lower end and having inwardly and down- 5,V l1. A stove comprising a repot and a wardly inclined ducts through which-light 15 combustion chamber above vthe'ire-pot, a hot gases are drawn from the upper portionV of blast pipe communicating atits lupper end the combustion chamber and caused to pass with an air inlet, extending downwardly with theair down through the pipe. through the combustion chamber and havf :10 Ving a discharge outlet at its lower end openy JAMES DEAN.