USRE3564E - Coal-stove - Google Patents

Description

UNITED STATES PATENT OFFICE.

1%. B. VARDEN, 0F UIONTOVNLMARYLAND.

' ooAL-srovE.

Speciticationforming part of lLetters Patent No. 91,186, dated June 8, I69; Reissue No. 3,5611. dated Juiyao, 1869.

'o all whom struction and noyel arrangement of au airheating cylinder in such manner that the ameand products of combustion from a fire shall ascend both on the outside and inside of the same, and thereby secure the advantages of heating the air in said cylinder from two surfaces instead of one, as is usual in hotair furnaces not constructed according to my plan. .v

The letterAof the drawings represents a short hollow cylinder set in the base of a stove having a suitable fire-grate arranged immediately under it. The grate and the inner periphery of A constitute the tire-box, and is atleast a third larger than cylinder B, which is above it. Cylinder B is a third smaller, and

' twice as high as A. The center of cylinder Bis directly over the center of A. The internal part of A is unobstructed with anything to impede the current of air passing through it. It has a door in front, d, and a discharge-opening behind from its top,'as shown at C, but is of the same form as A, and leading froml the upper part of fire-box A to the lower part ef hot-air cylinder B in the rear. Cylinder B has its covering removed in front, as shownat m to expose the zigzag direction of t-he currents of' hot air'passing around it, as indicated by the red arrows.

The air enters the lower part of cylinder A at b', and divides, one portion going to the rightandthe other to the left. They meet in the rear and ascend through a pipe shown at dotted4 lilies a, and enter the hot-air space in cylinder B', and pass in zigzag current, as shown in the drawings, entirely around it, and escape through thc exit-pipe a. at the top, and are discharged at a into the hot-air chamber above the stove, as shown at-y; or it is conducted in suitable pipes in any direction required.

The fire having been'li-ghted in the fire-box A, the dame and products of -combustion yascend over the inner and outer surfaces of the hotair cylinder B, and, passingupward,

escape through the smokepipe 2 and down through pipe 1, and so descend to the bottom of the stove through drawer c thence into the n ash-drawer D and `drawer c and out vthrough pipe 4 into the chimney, as indicated by the red arrows. y f

The short pipe 3 is kept closed by agdamper while the stoveVis in operation; but while `kindling the fire it is left open to allow of the direct escape of the smoke.

Immediatel under the vertical smoke-pipes 1 and 4 are the drawers c c, having the inner side of each hinged to drop down on the bottom, where they rest durin g the time that the stove is in operation for the purpose of aiding in controlling the -draft of the fire on the one hand and receiving the soot and dirtfrom the smoke pipes ou the other. Y

Drawer l), under the center of the stove,fis for receiving the ashesfalling from the grate and allowing airpassage for feeding combustion.

The advantage of this air-heating stove over other hot-air stoves is that the airheater B is heated both on the inner and outer surfaces at the same time, while other hot-air stoves are heated from one fire-surface only.

' The novelty of the drawers-c isy thatl they perform the double function of being a sootreceptacle and controlling the draft `at the same' time.

On the drawings, the aperture for conducting the air into the lower end of the cylinder is shown at b.v Iam not confined in my device to this particular opening at this particular place, as my apparatus will work with equal perfection in case I ad mit the air at some other point or points. Indeed, it is often desirable to admit the air from the outside of the build-V ing by a pipe leading directly tothe bottom of the cylinder. Figure 3 of the drawings represents my cylinder when constructed with one {ire-surface only..

The proportions mentioned in this specifica paratively, in order to increase the circuit of n the heatingar.' Neither do I wish to confine inthe cylinder, as a spiral or free course for pose.

coal-stove. I do not wish to conne my patent fire-surface only. In thatcase it is less ei`1-` .as described, and its 'application to the uss for which it is adapted. The manufacturer must be governed by the necessities of the case as to its size and proportions. i

l Fire-brick and soapstone maybe sometimes advantageously used in the construction of a portion of this cylinder, and particularlyof that portion which lies adjacent to the re. What I claim as my invention, and'desiref to'secure by Letters Patent, isy 1 1. The arrangement and construction of thet on for the guidance of manufacturers in constructing my apparatus constitute'no part of my invention, nor are they intended as infallibleguidesinsuchmanufacture. Ifrequently construct the cylinder lof great 1ength,com

myself A to the zi lzag direction given to the air such air may be made to subserve a good pur- 4 My de/vice,v as represented on the drawings, shows a heating apparatus in the form of a enveloped by flame and products of combus-,u

tion through its axis and onits outer periphery, substantially in the manner and for the purpose set forth.' l- 2. The air-heating cylinder B, when constructed and arranged to operate substanially as and for the purposes herein specified.

lJune18,1869.

. s R. B. VAR-DEN.

JAMES P. GREvEs,

A.- G. HEYLMUN.

to that specific heating apparatus, as my device is applicable to vfurnaces generally for theproduction of heat and open fire-places. When applied to furnaces,- the cylinder should be constructed very broad.

I sometimes construct my cylinder with one cient than when formed as speciiied above, but it has still many advantages over the ordinary methods bf producing. heat. v

My main invention consists'in the cylinder,

air-heating chamber in such manner that while a; -A acts as ajire-box and air-heater, B shall be

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