US2530095A - Stove attachment - Google Patents

Description

NOV. 14, 1 950 c. STEVENS 2,530,095

STOVE ATTACHMENT Filed June 14, 1946 2 Sheets-Sheet '1 so 5066a I u twin 1' Z6 6 2473215 Tfifgve 225 QM rm A No we Patented Nov. 14, 1950 STEVE ATTACHMENT Curtis Stevens, St. SimonslIsland, Ga'.

AppIicationJune '14, 1946, Serial 'No. 676,654

This invention relates to an attachment for coal burning stoves and is especially intended to provide an attachment of simple construction by meansof which a. sheet metal wood burning stove may be readily converted into a coal burning 5 lmay be of any-desired"shape'a-nd is provided in stove; but is likewisewell adapted for stoves contheiront partand adjacent the bottom thereof structed for use as coal burners and may be emwith a fianged-opening-M contaihing-a'removable bodied therein as a part of a stove as originally closure t5. The flange opening M'i's provided constructed or may be appliedthereto as an atfor removal of ashes from the'bottonrportion or" tachment for stoves already in use. ash pit 56 of the stove l. The sidewalls "I"? and It is a: primary object of the present invenbottom 5% of thestovel may beformed of sheet. tion to provide an attachment for admitting air metalas'is conventional in 'WODdbll1lli ngSt0VeS to the fuel of a coal burning stove in such a or may beforrne'd of" castironf' or otherheavie'r' manner that the grate will not be oxidized therematerial. The top? wall" Elis'preferab'ly" formed" by but nevertheless so that the air will be disof c'astiron to withstand theheat to whichnthej charged into the coal so as to result in maximum topwa'll is subjected, v j combustion. A grate r9, havingga' concave'upp'er. sideti's A further object of the invention is to provide mounted in the lower portion of t'hestovdcasingf air supply means adapted to be located in the fire and." is supported abovethe bottom. it by debed. and adjacent the grate of a stove to concenpending legs '29 which're'sti on the upper, side of trate the flame and the burning portion of the the bottom l8. j fuel bed adjacent the center of the grate to The 'front portion ofthe stove wall i isprothus enable the burningpf coal in sheet metal vided with an opening 21 .which is located above" stoves, intended'as wood burning stoves. and adjacentto the flange opening itior' 'r'e" Other" objects and advantages of the inveniceiving a. pipe or conduit '22, which 'isdifsposedi" tion will hereinafter becomemore' fully appare t with a. substantial portion'thereof located 'in the from the following description of the drawings, stove and above and adjacent to the supper,v whichillustrate a preferred. embodiment thereof, concave side of the grate IS. The pipe'orfconand wherein: duit ZZis provided adjacent its outer end with Figure 1. is a front elevationalview oi a stove a collar 23 which is secured by fastenings. 2 1 to with the attachment, comprising the invention, the outer side of'the stove wall' l1, around the applied thereto; opening 2!. The inner portion of the pipe 22, Figure 2 is a vertical sectional view of the stove which is located above the grate I5, is provided taken substantially along a plane as indicated by with two longitudinally extending rows of aperthe line 22 of Figur l; tures 25 which open outwardly and obliquely Figure 3 is an enlarged transverse vertical secdownwardly with respect to the grate 59, as best tional View of a portion of the stove taken subillustrated in Figure 3. stantially along a plane as indicated by the line The pipe 22 is provided, adjacent its outer end 33 of Figure 2; and outwardly of the collar 23, with an arcuate Figure l-is a longitudinal. substantially censlot 26 of a length in excess of 180 degrees. The tral sectional view showing the attachment repipe 22 is provided with an upwardly projecting moved; apertured ear 2'! located adjacent one end of the Figure 5 is a cross-sectional view of the atslot 26 for receiving a fastening 28 which extends tachment taken substantially along a plane as through and pivotally engages an arm 29 which indicated by the line 5--5 of Figure 4, and projects from a portion of a valve 3%. The valve Figure 6 is a fragmentary horizontal sectional 30 is substantially circular and. of a diameter subview thereof taken substantially along a plane stantially equal to the internal diameter of the as indicated by the line 66 of Figure 5. pipe 22 and is provided with a cut-away portion Referring more specifically to the drawings, 3!. The valve 30' is provided with a handle 32 the numeral 1 generally designates a heating which projects therefrom through the slot 26 and stove having depending supporting legs 8 and which is disposed substantially in diametrically a r6m0vab1e D 9. The top wall 9 of the stove opposed relationship to the arm 29. It will be is provided with a Opening fl q pped with readily apparent that by swinging the handle 32 a swingably mounted closure ll through which in a counter-clockwise direction as seen in Figfuel is applied to the stove. The opening I0 is ure 5, that the valv 30 will be swung upwardly located adjacent the mne paa of the stove-and the top wall 9 is providedwithafianged open ing 52, adjacent the rear of the stove, which is connected to a stack" or chimney-131' Thestove and outwardly with the respect to the slot 26 and the bore of the pipe 22 to thereby increase the size of the passage of the bore of the pipe 22 adjacent to the valve 30'. The fastening 28 is adapted to be tightened sufficiently so that it will frictionally engage the arm 29 to retain the valve 30 in an open or partially open position. As seen in Figure 5, when the valve 30 is in a fully closed position the cut-away portion 31 will form a restricted passage witha part of the bore of the pipe 22 to allow a limited amount of air to pass inwardly through the pipe or conduit 22, so that the valve 30 is not capable of entirely shutting off the passage of air therethrough.

From the foregoing it will be readily apparent that the apertured portion of the pipe or conduit 22 is disposed just above the concave upper side of the grate l9 so that when coal, not shown, is supported on the grate and ignited the coal and bed of burning embers will be located over and around the apertured portion of the pipe 22. The smoke stack or chimney I3 in carrying off the product of combustion from the stove 1 will cause a partial vacuum to be created therein which will create a suction in the pipe 22 so that air will be drawn inwardly through the outer open end 33 thereof, past the valve 30 and will be discharged from the pipe or conduit 22 through the aperture or jets 25 in an outward and downward direction into the coal or burning embers, due to the fact that the inner end of the pipe 22 is closed as seen at 3'4. Sufficient air will thus be provided to produce proper combustion without other means of admitting air to the stove and as a result thereof no air will be admitted upwardly through the grate l9 thus reducing the tendency of the grate to oxidize, increasing the usable life of the grate. The concave upper side of the grate 19 tends to retain the coal and burning embers in close proximity to the air supply pipe 22 thus causing the coal to be burned more thoroughly and completely leaving less ash and reducing coal consumption. The valve 30 can be adjusted, as previously explained, to effectively and accurately control the burning of the fuel. By having the apertures 25 arranged to open outwardly and downwardly the air is not only better dispensed evenly through the coal and burning embers but the likelihood of the ashes accumulating in the apertures is greatly reduced.

Since the burning embers are concentrated in 4 the center of the grate 19, it is possible to employ a stove having a bottom and side wall formed of sheet metal which otherwise would only be adaptable for wood burning, so that by applying the attachment to conventional wood burning stoves of sheet metal the stove may be adapted for burning coal and similar fuel.

Various modifications and changes are contemplated and may obviously be resorted to without departing from the spirit and scope of th invention as hereinafter defined by the appended claim.

I claim:

A control valve for an air supply conduit of a stove, comprising a conduit provided with an arcuate circumferenti-ally extending slot, said conduit having an upwardly projecting ear disposed adjacent an end of the slot, a valve body, an arm projecting radially from the valve body and pivotally connected to the ear, said arm extending through said slot for swingably supporting the valve body for movement through said slot into and out of the bore of the conduit, a handle projecting outwardly from said valve body and remote to said arm and disposed for movement in said slot for varying the position of the valve body with respect to the conduit bore, said valve body having a cut-away portion forming a restricted passage with a portion of the conduit, when the valve is in a fully closed position, to insure the passage of a limited amount of air through the conduit at all times.

CURTIS T. STEVENS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 189,096 Halsted Apr. 3, 1877 672,077 Foster Apr. 16, 1901 880,977 Darling Mar. 3, 1908 1,596,922 Clevenger et al. Aug. 24, 1926 1,617,943 George Feb. 15, 1927 1,870,557 Curd Aug. 9, 1932 FOREIGN PATENTS Number Country Date 359,534 Germany Sept. 23, 1922 436,394 Great Britain Oct. 10, 1935

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