US788571A - Stove or furnace. - Google Patents

Description

ITO-788,571. I PATENTED MAY 2, 1905. M. W. WOODBURN.

STOVE 0R FURNACE.

APPLICATION FILED NOV. 18, 1903.

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NITED STATES ratenteca May 2, 1905.

PATENT OFFICE.

MATTHEW W. WVOODBURN, OF DETROIT, MICHIGAN, ASSIGNOR TO THE SIPHON STOVE COMPANY, OF DETROIT, MICHIGAN, A CORPORA- TION OF MICHIGAN.

STOVE OR FURNACE.

SPECIFICATION forming part of Letters Patent No. 788,571, dated May 2, 1905.

Application filed November 18, 1903. Serial No. 181,623.

To (.LZZ/ whom it may concern.-

Be it known that I, MATTHEW W 001)- BURN, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Stoves or Furnaces, of which the following is a specification, reference be ing had to the accompanying drawings, which form a part of this specification.

My invention has for its object to provide certain new and useful improvements in stoves and furnaces; and it consists of the construction, combination, and arrangement of devices hereinafter described and claimed, and illustrated in the accompanying drawings, in which 7 Figure 1 is a View ofv a stove in elevation, showing parts broken away, illustrating features of my invention. Fig. 2 is a partial vertical section illustrating features of my in vention. Fig. 3 is a plan view of the grate. Fig. 4: is a view in section on line 4; I, Fig. 3, certain parts in elevation being omitted. Fig. 5 is aview in section on line 5 5, Fig. 3. Fig. 6 is a view in section on the line 6 6, Fig. 3. Fig. 7 is a view of parts of the stove in horizontal section. Fig. Sis a view similar to Fig. A, but showing a gas-pipe connection with the shaker.

More particularly, my invention is designed to provide a novel construction of the grate whereby air may be admitted thereinto to keep the grate-bars cool and prevent the grate from being burned out.

My invention also contemplates the general construction and features herein described, illustrated, and claimed. 7 p

I have shown in the accompanying drawings my invention as applied to a stove, the drawings and the following description thereof serving to illustrate my invention, the invention in its essential features being applicable, however, not only to stoves, but to ranges, furnaces, and analogous constructions where a grate is employed or where a tire-pot and magazine-section of similar construction may be utilized. Moreover, I have shown, as

without into and through the air-chamber of the stove or analogous devices, whereby the air is heated and passed into the combustionchamber of the stove, causing thereby a great saving of fuel over other constructions for like purposes.

I carry out my invention as follows:

In the drawings. a represents the inclosing shell of a stove in which is located a hollow shakeable grate o, the grate being supported in any suitable manner to be shaken, as upon a ledge 0 of a lire-pot (Z. The grate may be constructed in any suitable manner to permit the introduction thereinto of cold air for the purpose of preserving the grate from destruction by the intense heat constantly surrounding it. As indicated in the drawings, the grate may be made of two chambered plates, (indicated by the numerals 1 and 2.) For eonvenience of construction I do not, however, limit myself to the particular manner of construction of the body of the grate, as a hollow grate of any suitable construction is contemplated within thescope of my invention, the grate being arranged so as to be shaken. The grate is provided with a hollow shakerhandle communicable with the interior airchamber of the grate. The hollow shakerhandle is indicated at a and may be formed integral with the body of the grate or otherwise, as may be preferred. The hollow shakerhandle is a fixed part of the grate and projects outward from the body of the grate, so that it may be readily engaged in any suitable man- 5 its durability. The grate may be constructed 4 low shaker-handle,

ner for shaking the grate. particularly in Fig. 7, the device is provided with a door-plate, (indicated at f,) the plate formed with an elongated opening through which the outer end of the shaker-handle projects, the plate permitting the movement of the shaker-handle to and fro to shake the coal. Over the plate f Ilocate a door j, constructed to close about the outer end of the shakerhandle, so as when in closed position to practically shut off the entrance of air through the opening in the plate into the interior of the stove and compelling the air to enter through the open end of the shaker-handle. To this end a door is preferably formed with open-work (indicated at g) to conceal the outer end of the shaker-handle. Said door is shown hinged, as at g, so that the doormay be swung open when it is desired to shake the grate.

As above observed, I prefer to construct the stove with provision for a downdraft, as indicated by the arrows, a double-acting damper, as indicated at h, and a feed-door at 2'. Above the fire-pot, which is preferably made flaring toward its upper edge, I locate a magazinesection A, diverging from the top thereof toward its lower edge. It is readily understood that in the use of soft coal it has been difficult in employing the same with ordinary magazine-stoves on account of the expansion of the soft coal when heated; but by expanding the magazine-section at the lower end thereof to give room for such expansion the clogging of the coal in the magazine is effectually prevented.

Among the advantages of this construction are the ability to use soft coal and make it last as long and do as much heating, ton for ton, as when hard coal is employed. In consequence of the perfect combustion secured the smoke and gases are consumed and a very considerable saving is effected in the cost of fuel. Stoves and analogous constructions embodying these improvements combine a superior degree of heating capacity, as well as great economy. By utilizing adowndraft the products of combustion are constantly charged with fresh oxygen, and the products of combustion being commingled with air are compelled to pass down into and through the fire zone, by which perfect combustion is secured, and a proportionate volume of heat is thus derived from the products of combustion which in other constructions of analogous devices are liable to be unconsumed and wasted.

, It will be'apparent that a constant circulation of fresh air is provided through the grate, the air when passed through the grate being discharged into the fire to aid combustion, while at the same time the grate can be shaken like any ordinary grate without interrupting the flow of oxygen or air therethrough. This constant circulation of air through the grate prevents its becoming overheated and insures As shown more within the scope of my invention so as to constitute a combined coal and gas burner, and a gas-supply pipe m might be connected with the hollow shaker. The, grate may be constructed in any desired manner for the exit of the admitted air or the gases admitted thereinto. By the use of a downdraft it will be apparent that fire burns not so much up into the coal as away from it, preventing waste, the coal falling down upon the fire-bed as the lower portion of the coal is consumed. By this construction soft coal may be made to last quite as long and to do as efiicient service as an equal weight of hard coal when used in stoves, furnaces, and the like of ordinary construction. The feature of preserv ing a shakeable grate by a constant air-current therethrough is obviously a matter of much importance.

The burner is shown with perforations a for the emission of air or gas from the burner into the combustion-chamber.

It will be understood that in a downdraftstove provided with my improved grate the air supplied by the downdraft passes downward through the fuel in the combustion-chamber, finding its way from the top of the fuelbed downward therethrough, and passes out of the combustion-chamber through the openings (indicated at 50) in the grate, the air passing thence from beneath the grate up through the flue y and into the chimney.

What I claim as my invention isi. In a stove or analogous construction a hollowhorizontally-shakeable grate construct ed with openings therethrough for the passage of a downdraft current through the grate, and provided with a hollow shakerhandle engaged therewith through which air may be supplied to circulate through the grate, said stove having a surrounding shell provided with a door-plate through which said handle projects, andadoor closing closely about the outer end of the handle constructed to permit the entrance of air into the shakerhandle to circulate through the grate, but not into the body of the stove.

2. A downdraft stove or analogous construction provided with a hollow horizontally-shakeable grate constructed with openings therethrough for the passage of adowndraft-current through the grate and having a hollow shaker handle engaged therewith through which air may be supplied to circulate through the grate, said stove having a surrounding shell provided with a door-plate through which said handle projects, and a door closing closely about the outer end of the handle constructed to permit the entrance of air into the shaker handle to circulate through the grate but not into body of the stove.

3. In a stove or analogous construction a hollow shakeable grate provided with a hola surrounding shell provided with a door-plate through which said specification in the presence of two subscribhandle projects, and a door closing closely ing witnesses.

about the outer end of the handle constructed r r to permit the entrance of air into the shaker- MALTHEW WOODBURN' 5 handle to circulate through the grate, but not Witnesses:

into body of stove. N. S. WRIGHT, In testimony whereof I have signed this D. Z. OURTIss.

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