US 1502200 A
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jufiy Z2 1924. 1.5%2200 w. T. HOWI ETT ET AL GAS STOVE Filed Jan. 14
M N QQI mm ATTORNEY?% Patented July 22, 1924.
WILL AM T. HOWLETT AND HENRY o. s vnrnjon new YORK, NQY;
Application filed January 14, 1922. Serial N 0'. 529,127.
To all whom it may concern:
Be it known that we, WVILLIAM T. How- LETT and HENRY 0. SMITH, both citizens of the United States, and residents of New York, in the county of Kings and State of New York, have made a certain new and useful Invention in Gas Stoves, of which the following is a specification.
This invention relates to gas stoves, and has for its primary object the provision of a gas stove which is simple in structure, economical of manufacture, and economical and efficient in-operation. I
A further object of the invention is to provide a gas stove which relies upon circulation of heated air entirely for its. efficient operation, as distinguished from heat radiation, with the incident advantages of safety, economy in gas consumption, and.
more efficient and greater distribution of heat for any given period of time.
A further object of the invention is to provide a gas stove of the character hereinbefore set forth wherein effective thermo insulation is obtained for the sides of. the
stove whereby the same remain cool irrespective of the time of operation thereof, thereby eliminating great sources of. danger of stoves of this nature both for confiagration or burns due to incidental or other contact with-the sides of a stove when in use,
A further object of the invention ,is to employ the principle of the Bunsen burner in connection with a stove of this nature, and to employ in connection therewith a maximum amount of draft to effect heating air currents and thereby secure heat by circulation as distinguished from the ordinary.
gas stove structure which is designed either to heat an area of the stove itself and thereby efi'ect heating through radiation, or to heat by radiation and circulation.
A further object of the invention is to provide means in connection with the utilization of the Bunsen burner principle for rendering the same substantially noiseless in,
Further objects of theinvention will appear more fully hereinafter.
bythe accompanying drawing. and finally pointed out in the appended claims.
Referring to the draw1ng,
embodying our invention;
Fig. 2 is a sectional view taken on the line 22 of Fig. 1, and looking in the direction of the arrows; and
Fig. 3 is a similar view taken on the line 3-3 of Fig. 1, and looking in the direction of the arrows. 1
The same part is designated by the same reference character wherever it occurs throughout the several views.
As hereinbefore briefly outlined, the stove of our invention is directed to utilizing the Bunsen burner principle for heating large currents of air by constantly flowing by, a heated area or surface to thereby effect heating by circulation as distinguished from radiation alone, or radiation and circulation. Heating accomplished :in this manner is well recognized in the art to be more eflicient and more economical than the radiated heat type of stove. The reason for this will be obvious when it is considered that if good circulation is obtained, the heat is more efficiently distributed, and in consequence a greater area and volume can be heated in the shortest possible time. An-
other disadvantage of the type of stove which radiates heat is that the sides of the stove become extremely hot,vfrequently resulting in bad burns to children or grown-' ing our inventionin connection with the illustration thereof contained on the draw::
ing appended hereto, but we wish it to be understood that. the structureselected for the purpose of illustration is tolbe regarded in an'illustrative sense and notin a limiting sense, and we do not desire to be limited or. restricted to any particular form, shape, size, construction or material, as many modifications and changes in details and arrangements will readily occur to those skilled in the art without departing from the spirit and scope of our invention. .-,In the form shown, however, we show a usual stove structure, preferably cylindrical, with the; outer shell 1 thereofof any suitable mate rial, preferably meta-l, supported by the,
usual legs' 2. T'heshell 1, if desired, may be provided with an ornamental skirt '3, secured to the bottom part thereof, and is preferably provided with abottomA, secured thereto, which bottom 1 is preferably of metal provided with numerous fine perforations therein. The purpose of the perforations is to afford greater air draft, as will" be more fully hereinafter set forth, and at the same time a-fEord a bottom to the structure to prevent any material-fromfalling through the bottom of the stove. \V hile this bottom isgnot strictly required with the gas stove of our invention, it is neverthe'lessshown, as the "same constitutes a requirement in some States-ass. fire preventive measure. lhe gas supply; is fed through the bottom of'the stove 1 in any suitable manner, "for example,
by means-"of a'pipe "'6,-wliioh' is secured to an angle j oint 7 the Bunsen burner structure s'zbe'ing lik wise secured thereto and proj ecting: upwardly in the' shell 1, in the approxii mate: centrethereof. of course, the pipe supply:6 is provided=with means for attac mentjto'a rigid or fieXib-le'supplypipe (not shown), an'd is controlled by the usual or -any: desired type I of stop =cock (not shown) w The Bunsen burner is of the usual construction, including the air'supply 10, and the tip thereof- 11 extends Well towards the "centre o'f the shell 1. Suitably supported by the 1 shell 1, lout spaced therefrom is a- 'metal' plate 12,*Wh10l1, in the form shown, is cylindrical.
Any suitable-i means -may "be provided for supportingthe shell 12 in its spaced relation with-" re'ferei'ice to the shell- 1. W e have shown-*as-illustrative of one-means, towhioh,
however, we do not desire 1 to be limited or restricted,' braokets-13, riveted or otherwise secured at one "-end to the-shell 1, and at the other 'end to the shell '12. We insulate the metal-shell 12 with reference to' the sh'ell 1,
as efliciently as economy andfacility will permit, and ha-ve found that the mostefli- V cieamnd economical 1 method of insulating the same is' by 'means of an I asbestos cover 1 a ing 14, whichcompletely surrounds the same and 'is' he'ld in pl a'ce by 1 screws,- rivets, bolts or the like. For this purpose the attaehment me'ans employed for securing the ends of the braekets 13 #may loe employed. The
' shell -12' is of 'muehshorter length than the shell 1, -and is positioned "relative the tip "11 of the Bunsen burner- 8, so that the end of the burnerprojects in'the approximate centre of' the she11 12 but a slight; distance. In
other words', the ehurner and the shells 12 and '1' are in concentric arrangement with each-other, with the she'11 12'looat'ed at the approximatecen'tre Of the shell 1, with the I tip 11 of 'the-'fPiims'en burner projecting upwardly in the shell 12-Tshort d'is'tance. At' or near thebottompf' the shel1 12, -w e provide suitable lmeans for supporting What we will term the'crucib'le-shaped radiator.
'While these means may be of any suitable or desired nature, we have found it suflicient to bolt, screw,.rivet or otherwise attach to the shell 12 (and likewise utilize these bolts,
-:etc.,'to hold the lower edge of the asbestos covering 14: on the shell 12) a plurality of brackets 15* with theiriends upturned as at 16,
to form flanges to position and retain thereon the crucible shaped radiator17. The-crucible shaped radiator 17' may be of anyfsuitahle or desired shape or material. We have found, however, a radiator formed of fire clay "open at one end and closed at theot-heryandprd vided with numerous I perforations 18, there-" 0 in, for easy flare'of gas Hame -and positioned in an inverted position over the brackets "15, to' be effective for 'the purpose of thisinvention. 'The radiatoris spaced is concentrically =-arranged 1 relative 3 to "the shells l and 12 and the'bu'rner 8, j To'ipr-e vent injury t0 the radiator, espeoially dun ing the-shipment tlzsreof, an 'qadd-itional bracket'20 of any suitable material may be provided 'for engagement with the' to 6f the crucible -'shapedradiator-17. The' top of the stove is provided with" a' hood which may be of any suitable shapeor; material. Vie have found it advisable-toinsike the top'21- separate from the shell- 1, and capable of being inserted therein,-as one meansofsecuringthe two together. The
top may be formed in any suitable-manner.
The I sole *function thereof 1 is to permit free-' egress of air from within the-shell 'l therethrough. Therefore, the same may be formed ofwire mesh,"or, as shown, ofme'tal provided with numerous "large perforations therethrough. The-top may be prov'ided permit utilizing an exceedingly large draft area.
The operation of the burner thus fa'r described :is as follo'w'sz r I The Jgas is turned onso thait m mbstructed flow to the Bunsen b'urner' is 'iob-: tained, and a flame is applied to the ti'pof the burner through the door 23, The heat of the flame, of course,iheats ithe' orucible shaped "radiator 17 *and the inner shell 1'12,
and the space between 12 andl'l'Y. "At'the froin the inner shell 12, asisapparena and with a door: 23, i equipped with any 'isu'itable same time an enormous' idraft area is Ipro- V vided at the lower portion ofthe'stove and due to thehea't from the'burne'r, the cruelble shaped radiator 17, and-the inner shell 12, the air passing therebybecomesheated through contact therewith, which heated air useful and our own invention and desire to is augmented, of course, by a portion of the air passing by the burner tip 1nto the crucible shaped radiator and through the perforations thereof, and the air flowing between 1 and 12 becomes mixed with and heated by the heated air. This heated air flows freely through the top or hood of the stove, and naturally seeks the altitude. With this construction it will be apparent that the colder air from the bottom of the room is first utilized for heating purposes, and the heated air is circulated, as distinguished from radiation, because due to the outer shell 1 being effectively insulated from the inner shell 12, non-radiation is obtained, with the incident advantages of safety hereinbefore pointed out, while, at the same time, due to the large volume of air handled by the stove, the circulation is speeded up, and in consequence the greatest amount of heat is circulated to effect heating in the least amount of time, with the resulting greater efficiency and economy, as above stated. The crucible shaped radiator 17, in addition to serving its function of heating, also serves to render the Bunsen burner substantially noiseless in operation.
Many modifications and changes in details will readily occur to those skilled in the art without departing from the spirit and scope of our invention as defined in the claims, but having now set forth the objects and nature of our invention, what we claim as new and secure by Letters Patent is:
1. In a gas heater, an outer shell having a perforated lower area and an unperforated upper area, a perforated bottom for said outer shell, an inner shell supported from said outer shell in spaced relation therefrom, said inner shell extending from said perforated area and terminating in said unperforated area to thereby provide a free air inlet area below said inner shell and a large heat mixing chamber above said inner shell, a radiator supported in spaced relation within the inner shell, and a burner extending into said radiator.
2. In a gas heater, an outer shell having a perforated lower area and an unperforated upper area, a perforated bottom for said outer shell, an inner shell supported from said outer shell in spaced relation therefrom, said inner shell extending from said perforated area and terminating in said unperforated area to thereby provide a free an inlet area below said inner shell, an asbestos covering for said inner shell, a large heat mixing chamber above said inner shell, a crucible shaped radiator supported in spaced relation within said inner shell, and a burner extending into said radiator.
In testimony whereof we have hereunto set our hands on this 12th day of January, A. D, 1922.
WILLIAM T. HOWLETT. HENRY O. SlllITH.