US1528048A - Thomas f - Google Patents

Description

T. F. DEPUY .un PREHEATING MEANS Fon soun FUELBURNING sTovEs Filed April 18, 1922 y.1.

MarQS, 1925.l

ATTORNEY.

Patented Mar. 3, 1925.

i UNITED .STATES 1,528,048 PMI-:NTv -oFFlcaf THoMAs rj DEPUY, or` MAUCH GHUNIL PENNSYLVANIA, AssIeNoR tro LEHIGH srovn AND MANUFACTURING COMPANY, or LEHIGHTON, PENNSYLVANIA, A GOR- f f PORATION 0F PENNSYLVANIA.

AIR-PREHEATING FOR SOLIDfFUEL-BUR-NING STOVES.

'Appnc'ationmeaaprn 1s, 1922.- A seriaiNo. 555,163. l

To all whom t may concern: L

Be it known that I, THoMAs F. DEPUY, a citizen of the United States, and a resident ofv Mauch Chunk,v in the county of Carbon andState of Pennsylvania, have invented an Improvement in Air-PreheatingMeans for SolidFue`l-Burningv Stoves,'of which the following is a specification. v

In the case Aof solid .fuel burning stoves of certain types and kinds, for' instance, cooking stoves, itis desirable that means be provided for causing relatively quick' ignition ofthe fuel atcert'ain points or within certain regions adjacent some partl or compartment of thel lstove which should be quickly heated. v Y Y he object broadlyfof myinvent-ion 'is to provide means whereby portionsV of theV fuel Y at certain selected points orwithin a selected predetermined region may be more quickly ignited than would be the case if the device embodying Vmy invention were. not present. Vj VAmore specific object of lmyinvention is to provide. means whereby air Ymay be cheaplyandV economically pre-heated and -admittedto the said selected predetermined region within the fire box. u i

A further general object of the invention is to provide a deviceof the character indicated which is simple in construction and which may be cheaply yand economically manufacturedand placed in use.y Y

In order that the invention Vmay be readily Aunderstoodand its practical` advantages fully appreciated, reference shouldbe had to the accompanying drawing in which I lhave illustrated one form -of. embodiment of the.V device. embodying 'the said invention; but it will be understood thatthe `invention -is susceptible of embodiment in` forms of Yconstructionother than that shownv and that changes in the details ofvconstruction mayY be made within the scope..of'the claimsv Fig. 3 is a view in side elevation of the said device looking toward the left in Fig. 1; and f Fig. t is a horizontal sectional view of the said device taken on the line L1-4t of Fig. 1.

It will be noticed that I have shown my invention as applied to or embodied ina cook stove, but it will be understood that it may be applied to 4other kinds of stoves should suchV application become desirable.

Referring to the drawings: 1 designates the firebox ofa solid fuel burning stove Vand2 the fuel therein. The grate for supporting thefuel is not shown. At one side ofthe fire box 'a water holding and heating receptacle 8 is shown by means of which a supply of heated water may be provided. The said wat-er heating receptacle 3 is supportedl against an outer wall structure 4 of the stove. The air for effecting vand controlling combustion of the fuel 2 issupvplied througha controllable draught openling in .the side of the stove.. The heated gases-emitted from the lire box 'or combustion' chamber travel therefrom upwardly and laterally through a passageway?w and thence around the oven 8 in known manner.

The device embodying-my invention is situated intermediate the fire box or chamberl and the wall 10 ofthe oven 8l adjacent the fire box or combustion chamber and is secured to said wall by a bolt 10a. The said device 'constitutes the lower ipart ofthe sideof the fire vbox or chamber adjacent said oven. The said device comprises a .box-like. memberhaving a bottom 11, upper and lower sides 12 and 13 and end walls 14. f The outer or top edges of the .upper andv lower sides 12 and 13` and the .end walls 1t contactfwith the adjacent wall 10 offtheoven 8 to form an air chamber, as clearly shown in Fig. 1. The .lower side 13 lof the device is provided with a down- .at its opposite ends in outwardlyextending projections 16.V These projections extend.

yunderneath a shoulder 17 formed in the wall 10 of the oven 8 and the outer edges wardly extending portion 15 terminated thereof contact withv the botto-m of an inwardly depressed portion vof said wall so .as toj form a channel 18 leadingfrom the ash.. pit chamber below the fire box intothe Asaid air chamber.

. Al portion of the bottom 11 of the said device a distance above the upper edge thereof extends inwardly toward the wall l() as indicated at 2O so as to form a shoulder 2l which extends lengthwise of the said device and in parallel relation to the top side wall l2 thereof. The said shoulder is provided with openings 22 at intervals therein through which the air is adapted to flow from the chamber within the said device into the fire box or chamber. The direction of flow is indicated by the arrows 23 in lTig` l. The bottom ll of the said device is situated in direct contact with the lower inside portion of the burning fuel 2 within the fire box or chamber l and in consequence is quickly heated so that the air which enters the air chamber is pre-heated.

The top side 12 of the pre-heating device constitutes a support for the insulating lining 25 situated intermediate the fire box or chamber' l and the upper portion of the side wall 10 of the oven 8. This lining, in the construction shown, consists of firebrick. The lower edge of this lining is retained in position by means of the shoulder or flange-like portion 26 which projects upwardly in the plane of the bottoni ll of the pre-heating device, as clearly shown in Fig, l of the drawing.

Assuming that a fire has been started within the fire box or chamber, the bottom portion of the coal is first ignited. The hot gases flow or travel upwardly through the bed of coal or other solid fuel and ultimately the entire )bed becomes ignited. Vithout the presence of a device'such as that constituting my invention disclosed herein the entire bed of solid fuel would become ignited progressively from the bottom upwardly, but it is desirable that the portion of fuel adjacent the oven should be ignited more quickly than usually is the case in order that the oven may become more quickly heated. lt is for the purpose of accomplishing this result that my invention has been provided. VAs already indicated, the bottom portion of the fuel is first ignited, consequently the device constituting my invention and which co-operates with the adjacent inner wall of the oven to form a pre-heating air chamber becomes quickly heated so that the air entering the said chamber through the channel 18 is likewise quickly heated and in its heated state is delivered through the openings 22 into fuel 2 in the hre box or cham# ber 'l at a point a considerable distance above the bottom thereof. rlhe said preheated air flows upwardly through the fuel adjacent the fire-brick 25 and, by reason of having been pre-heated, is quickly ignited. It'follows that the fuel within the region adjacent the oven above the point of delivery of the pre-heated'air into the lire box er chamber is quickly ignited so that the oven is more quickly heated than would be the case if the device embodying my invention were not employed. By this means a substantial economy in time may be effected as well as a more satisfactory combustion of the fuel.

Having thus described my invention what I claim and desire to secure by Letters Pate-nt is:

l. A solid fuel burning stove comprising a fuel chamber, the lower portion of the side of which adjacent the oven chamber consists of a box-like member, the bottom of which faces the fuel chamber and the sides and ends of which extend toward the said oven chamber, means for detachably securing the said box-like member to said oven chamber with the edges of said member in contact with a side wall of said oven chamber, the lower side wall of said box-like member being provided with an opening through which air is adapted toenter the chamber f-ormed b etween'the said box-like member and the adjacent wall of the said oven chamber, and the bottom of said boxlike member being provided with openings through which pre-heated air is adapted to be discharged from the chamber formed by the said box-like member and the adjacent side wall of the said oven chamber into the fuel chamber at a point a distance above the bottom of the fuel chamber below the normal top level of the bed of fuel therein.

2. A solid fuel burning stove comprising a device of box-shape having bottom, side and end walls, the edges of which are adapted to contact with the outer side of the inner wall of a chamber to be heated, the lower side of the said device having outwardly and downwardly extending projections to form a channel through which air is adapted to enter the chamber within said device and a portion of the bottom of said device a distance above the lower edge thereof being ex tended inwardly to form a. shoulder which extends in parallel spaced relation with respect to the upper side of said device and the said shoulder being provided with openings therethrough for vthe passage of air from the chamber within said device into the lire box or chamber.

3. A solid fuel burning stove comprising an open box-shaped device, means for securing the said device to a. wall of the said stove with its edges seated against said wall to form a closed chamber within the said vdevice, the said device constituting the lower "portion of one of theside walls of the fire box of said stove, and the lower side of said device being provided with depending and outwardly extending projections to form a channel for the passage of air into the chamber within the said deviceV and the `bottom of the said device a distance above its lower edge being extended inwardly to form a shoulder having openings therein which openings open downwardly for the passage of pre-heated air from the said chamber into the fire boX, substantially as and for the purpose described.

4f. In a solid fuel burning stove comprising an oven and a fire box, the combination of an open box-like lneniber, vthe edges of which contact with the outer side of the wall of the said oven which is adjacent the fire box, ineans for securing the said device to and holding it against Athe said wall, the lower side of the said device being provided with inwardly and downwardly extending projections to form a channel for the admission of air into the chamber within the Said device and the bottom of the said device a distance above its lower edge extending inwardly` to Jform a shoulder in spaced relation to the upper side of said device which shoulder is provided with openings eX- tending therethrough, an insulating lining supported uponl the upper side of said device and situated between the combustion chamber and lthe adjacent wall 'of the said oven, substantially as described.

In testimony that I claim the foregoing as my invention I have hereunto signed my name this 17 day of April, 1922.

THOS, F. DEPUY.

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