US537340A - Gas-burning fireplace - Google Patents

Description

`(No Model.)

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GAS BURNING FIREPLAGE.

No. 537,340. Patented Apr. 9.1895.

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GAS BURNING P PLA l i l I IWW Hl I"l min, LIHWHWWMH V f mgm m In Verfo rs UNITED: STATESAv PATNT OFFICE.

HENRY G. DAWSON AND WILLIAM R. DAWSON, OF OHIOAGO,'ILLINOIS.

GAS-BURNING FIREPLACE.

SPECIFYICATION'. fOlmng part 0f LetterS Patent N0. 537,340, dated. April 9, 1895. Application filed December 15I 3.894. Serial No. 531,886- (Nomodel.)

T0 all whom it mag/concern: v

Be it known that we, HENRY G. DAWSON and WILLIAM R. DAwsoN, citizens of the United States, residing at Chicago, in 'the county of Cook andState of Illinois, have inventedcertain new and useful Improvements in Gas- Burning Fireplaces; and we do declare the foldental extinguishing of some of the jets; and

an increase of the general efficiency of the fire place.

It consists of a tire back, preferably of sheetmetal having a multiple number of burner ports extending substantially over its entire area and being covered by lips extending upwardly from the surface of the fire back, and

being spaced apart from it at their upper edges.

It consists further of a gas chest of which theflre back is the front wall and from which the burner ports all lead. v

It consists further in the construction of the case for carrying the `fire back, in the manner described, wherebya free circulation of air and thelproper ventilation of the apartment are secured, .y

It consists in various minor parts as hereployed in the attempts that have been made to spread the flame over the entire surface of the fire back including the location of numerous burner ports throughout its area, each adapted to throw a jet of iiame forward. Difficulty has been encountered 'in this form of construction in securing'a uniform pressure at the Various ports, and inv preventing the accidental extinguishing of a part of the jets,

while the result has been simply to stud the fire back with small jets, rather than to cover it with acontinuous'sheet of flame as desired; and if any of these jets areoverlooked in lighting the tire', vor if. the flame from any of' i and shown in the accompanying drawings, in

whichi Figure l, `is a vfront elevation of our improved'fireplacepwithsonie portions of the burner broken away. Fig. 2, is a vertical section of Fig. l, on the line V2-p-2. Fig. 3, is a frontelevation of the fire `back with some of its parts removed. Fig. 4, isa sectional view of Fig. 3, on lthe line Liz-4. Fig. 5, is a sectional view of Fig. 3,V on the line 5-5. Fig. 6, is a detail of a part of the burner. an elevation of an ordinary open tire place with our improved burner adjusted to it; and Fig. 8, is a vertical section of the same on the line 8-8. Fig. 9, is a detailed section taken on the line 9--9 of Fig. v8.

The uprights of the frame of the iire place are shown at A; the upper cross-bar at a; the lower cross-bar at d'1; andthe open crown or base plate at 0.2. A sheet metal shell or casing B, extending back from the frame A, a, and conforming -to the Vordinary form of the opening in a A're place, carries the fire back O, and its appurtenances and forms therewith the air flue b, leading from the crown c2, back vof the hre back and discharging into the apartment from beneath the hood D, Yproj ecting forward and depending from the cross-bar a, the heated air being thrown forwardly and downwardly. y v

The re back C, is secured tothe casing B, in any ,desired manner. A wall or partition extends upwardly from its top and leads to the frontof the fire place and is continued by the forwardly projecting depending hood d, which is below the hood D, and which throws Fig. 7, isA

ICO

the heated air which ascends in front of the fire back'forwardly and downwardly so that it does not cross the column of air dischargterial will answer.

2 neuem ing from the flue b, and thereby check the circulation through it. The lower portion of the partition c, is curved forwardly from near the top of the fire back forming acove M, and enlarging the upper portion of the flue b, thereby facilitating the heating of the air therein.

A reflector plate c', extends from the cross bar a', to the base of the file back, preventing the air which enters through the open crown piece a2, from being diverted from the flue b.

The fire back is formed of the front wallf, of a box F, made entirely of sheet metal and having air tight joints. Gas Vfreely charged with air is delivered to the box F, bya mixer c', served by a gas pipe E, whose valve is located at E', and has a stem e, leading through the cross bar a.

The wall f, is freely punctured with burner ports f', which we prefer to locate in transverse rows as shown in Fig. 3, and which throw the gas jets directly forward from the face of the wallf. This arrangement of the burner ports is by no means essential. holes f is behind a li G, preferably of sheet metal, though any ot er incombustible masecured at their lower edges to the surface of the wall f, by the rivets g, and incline upwardly away from it, their upper edges being, as shown, bent in toward the surface, though the exact form of these lips in cross section may be varied according to the judgment of the maker. The effect of 'the lip is to form a pocket into which the gas is discharged from the burner port f', and which is open above. Within this pocket the gas is "burned in a mass, rather than in a jet and the fiame issues from the mouth of the pocket well spread out, and when the holes f', are arranged in transverse rows as shown, the flame from the lower series reaches up over the lip above and overlaps the fiame issuing from it.

By using one lip to cover a multiple number of burner ports, as shown, the pocket inclosed by it becomes filled with gas from end to end, and the flame issuing from it is uniform in intensity, so that the location of the ports is not indicated.

Asbestos in the wool form may be applied to the outer surface of the lips G, G', as shown at g', and also to the upper surface of the wall f, and the lower portion of the plate c.

The box F, is made of ample capacity so that tho supply of gas is uniform to all the burner holes.

In starting the fire it is well to allow the box to become well filled with gas before ap- Each of the The lips G, are as shown,

as the temperature within the pockets formed by the-lips, is very high and the carbon is consumed before the contact of the cool air of the apartment chills it. This form of burner is equally efficient with either the strong pressure at which natural gas is usually delivered to the consumer, or the pressure ordinarily found in artificial gas systems, as the current of air which naturally ascends in front of the fire back does not interrupt the discharge of the gas from the burner holesf', but on the contrary tends to facilitate the discharge of the flame from the mouth of the pocket. In consequence of this feature the fire may be regulated to suit the pleasure of the user by varying the gas supply,-an advantage not heretofore secured in gas burning fire places of this type. So completely are the burner holes protected from the pressure of the air currents that the gas will continue to burn after the valve has been closed until the box F, is entirely emptied cf it, the flame expiring first at the bottom ot' the burner.

As the front wall f, of' the box F, becomes much hotter than its rear WalL'its expansion is greater and it tends to become bowed. This tendency is `wholly overcome by the use of the stay bolts H, H, passing through both walls and carrying the sleeves 7L, h, whose length is equal to the normal distance between the walls.

Provision is made for discharging the products of combustion into the chimney flue by forming the flue I, leading from the front of the fire back through the plate c, and casing B. The walls t, of this flue are air tight so that it has no connection with the flue 6.

The Iiue I, is controlled by a damper K, closing its inner end and openable by means of a crank rod 7c, extending forwardly through the face of the frame of the fire place and connected with the damper by means of the link 7o'.

It is obvious that the burner herein described is not dependent upon the frame shown for its success, although the two combined constitute an exceedingly efficient heater. The burner is adapted for separate manufacture and to be `mounted within the various styles ofre places now in use whether for the use of gas or coal.

We believe ourselves to be the first to provide for the discharge of a mixture of gas and air into a pocket or trough within which it is burned, the flame issuing from an opening provided for that purpose. We do not desire therefore to be limited to the details of construction herein described.

We claim as our invention- 1. A gas burner having an air and gas mixer and a substantially vertical face provided with rows of perforations for the escape of the mixed gas and air, each of the several rows of perforations having a detiector adapted to deflect the mixture upward in a substantially continuous sheet and the perforations and 'ICO defiectors being so' spaced as to together discharge a practically continuous sheetof the mixture over the face.

2. A gas burner having an air and gas mixer and a substantially Vertical face provided with rows of perforations for the escape of the mixed gas and air, each of the several rows of perforations havinga delector adapted to deflect the mixture upward in a substantially continuous sheet, the perforations and deflectors being so spaced as to together discharge a practically continuous sheetof the mixture over the face, and the deilectors and the inl tervening. portions of the face between them being covered with wool asbestos.

3. Agas burner having an air and gas mixer and a substantially vertical face provided with a plurality of transverse rows of perforations for the escape of the mixed gas and air, a lip secured at one side only to the face and covering each row of perforations and forming with the face a pocket from which the mixture issues in a sheet, the distance between the rows being such that the dame from one pocket will commingle with that from the pocket immediately above it.

4. A gas burner having an air and gas mixer and a substantially vertical face provided with a plurality of transverse rows of perforations for the escape of the mixed gas and air, a lip secured at one side only to the face and covering each rowof perforations, and forming with the face a pocket from which the mixture issues in a sheet, the distance be- Y tween the rows being such that the dame from one pocket will commingle with that from the pocket immediately above it, the exposed surfaces of the lips and face being covered with wool asbetos.

In testimony whereof we ax our signatures in presence of two witnesses.

HENRY G. DAWSON. WILLIAM R. DAWSON.

Witnesses: Y

SPENCER WARD, LOUIS K. GILLSON.

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