US108754A - Improvement in hot-air furnaces - Google Patents

Description

tacoma ROYAL r. BROWN, or| OHIOAGO, ILLINOIS.

Letters Patent No. 108,754, dated November 1, 1870. I

IMPROVEMENT IN HOT-AIR FURNACES.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that I, ROYAL F.B1 .OwN,of Chicago,

in the county of Cook and State of Illinois, have invented -a new and useful Improvement inHot-air Furnaces; and I do declare that the following is a true and accurate description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon, and being a part of this speciication, in which- Figure 1 is a vertical section of my improvedfnrnace;

Figure 2 is a cross-section on the line a: a' in iig. l;

Figure 3 vis a crosssection on the line y yin the same figure.

Figure 4 is a detached elevation 'of the damper, enlarged, to show the method of operating it; and

Figure 5 is a cross-section of the gas-burner.

Like letters indicate like parts in each figure.

The nature of this invention relates to an improvement in the construction of hot-air furnaces, and consists in the improved construction and arrangement of its several parts, as more fully hereinafter set forth.

A represents an open annular base, supported by proper feet.

B is a sheet-metal' easing, whose lower end covers the vertical ange of `the base.

C is the ash-pit, to which access is had' through the door C' in the casing.

In the rear end of the ash-pit is a bracket, D, on which is mounted the circular grate E, provided with a handle, E', projecting toward the door, and'supported by a hook, c, depending from the top of the ash-pit. l v

The grate is also supported at one side by a lug cast in the side of the ash-pit, and its pivot, after passing down through the bracket, is curved, so that, by partially rotating the grate, until the handle is out ot' the hook, the grate may be turned up edgewise, to dump the contents of the fire-pot.

F is the lire-pot, which is supplied through the feeddoor Gr in the ease. y

H is annular plate resting on the edge of the firepot.

I is the exterior wall of the smoke-chamber, rising from the outer periphery ot' said plate, from which rise also the air-pipes J, inclined inwardly.

K is a diaphragm-plate, provided with a central opening. rIhe plate K-rests on the air-pipes which pass through it.

I is the inner wall of the smoke-chamber, with its lower end resting on the periphery of the plate K.

4The annular smoke-chamber is inclosed atthe top by an annular plate, Iz, laid ou the top ends oi' the wallsI I.

L is a cylindrical radiator,.placed on the plate K, within the circle formed by the mouths of the air- `pipes J, and is closed at the top by the plate L'.

M are smoke-ducts, connecting the upper part of Athe smoke-passage with the lupper part of the interior of the radiator, into which the products of'combustion are discharged.

N is a flue, depending from the top plate L' nearly to the bottom of the radiating-chamber,,directly over the damper O, pivoted in the opening in the plate K. At the top of the` flue N is a disohargetlue, N',

through which theremainingproducts. of combustionA finally escape to the chimney, passing through the hotair-charnber I, from which suitable pipes conductA the heated air to the points needed.

The damper is provided, on its npperside, with a curved arm, b the curve being perpendicular to its axis, and having the eye oi' the lower arm of the bellerank c, .with which engages a rod, el, passingthrough the casing of the furnace, s o that, by drawing out or pushing in this rod, the damper may be opened or closed.

The door G is sunken deeply inward, extending vnearly to the tire-pot, and through it is inserted a tri-V angular cast-iron pipe, closed at the inner and open at the outer end, forming a gas-burner, Q. This gasbnrner may be inserted at the edge, or n ear the lirepot, from any other part of the furnace, if desired,

and the burner may be of any convenient form, aL` though the triangular form shown is the preferable one.

The flat side of the pipe isiippermost, and the remaining sides, at the inner section, are perforated lwith a series of small holes, through which air enters O, which allows the smoke and gases of combustion to pass to the chimney, through the tlues N N'. iVhen the fuel is fully ignited the damper is closed, when the gases, which are ignited-by the airintroduced through Vthe perforated'gas-burner, pass into the annular chamber between the walls I-I, thence through the ducts M, into the radiating-chamber L,

Vbeing reverted to the bottoni thereof before finding exit through the iiue N, the cold air entering'the heater through -the open base. A portion` passes up aroundthe-walls I, which impart to it the heat of the gases within them. Another portion passes up through,

the air-pipes J, being highly heated by the iiames passing around them. i The air from the pipes passes into the space between the internal walls ofthe smokepassage-and the walls of -theradiaton where it is still further heated by radiation from each, thus obtaining all the available heat from the products of combustion before they issue from the furnace.

What I claim as my invention, and desire to secure by Letters Patent, s

The improved construction and arrangement of the several parts of `the furnace described, consisting of the base A, casing B, ash-pit O, door C', bracket D, grato E, handle E', and hook fire-pot F, feed-door G, plate H, smoke-cl1amber I Il, air-pipes J, daphragm K, plate I2, radiator L, and plate L', smokeducts- M, lines N N', damper 0, with arm b, bellcrank c, and rod d, chamber l, and detachable gashurnerQ.

ROYAL FpBROWN.

Witnesses:

HARRY'S. SPRAGUE, SAMUEL E. J ONES.

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