US1041761A

US1041761A - Means for feeding air to furnaces.

Info

Publication number: US1041761A
Application number: US65822011A
Authority: US
Inventors: William W Evans
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-11-02
Filing date: 1911-11-02
Publication date: 1912-10-22
Anticipated expiration: 1929-10-22

Description

W. W. EVANS.

MEANS FOR FEEDING AIR TO FURNACES.

APPLIOATION'PILED NOV. 2, 1911.

1,041,761. Patented 0122,1912.

2 SHEETS-SHEET 1.

WYTNESSES V INVENTOR @5 Mun/a COLUMBIA PLANOGRAPH IO-,WASHING'KUN. D. C.

WILLIAM W. EVANS, or SALT LAKE CITY, UTAH.

MEANS FOR FEEDING AIR T0 FURNACES.

One of the objects of the invention is the provision of simple means susceptible of being quickly and easily installed and con-. an operator is structed in such manner that enabled to control the air at the points where the air enters the furnace or fire-box, mixing of the of combustionthis in order to assure the volatile gases in the products with the oxygen, which mixture 18 essential to perfect consumption of the gases and other products of combustion.

Another object of the invention 1s the provision in a furnace of means whereby the draft in the stack or uptake is enabled to draw air upward from a chamber in communicatlon with the atmosphere and assure the thorough commingling of such air withthe products of combustion incidental to the passage of the latter over the fire or bridge wall of the furnace.

Other advantageous characteristics of the invention will be fully understood from the following description and claims when the same are read in connection with the drawings, accompanying and forming part of this specification, in which:

Figure 1 is a perspective view, partly in section and partly broken away, of so much of a furnace as is necessary to illustrate the best practical embodiment of my invention that I have as yet devised. Fig. 2 is an enlarged detail vertical section taken through the air chamber in the fire or bridge wall in the direction of the length of said chamber. Fig. 3 is a detail view of the same taken at a right angle to Fig. 2. Fig. 4: is an elevation showing the apertured inner Wall of one of the air chambers at opposite sides of the fire-box and also showing the regulating slide adjacent said wall. Fig. 5 is a horizontal section taken in the plane indicated by the line 5-5 of Fig. 4:. Fig. 6 is an elevation of the regulating slide that is arranged next to the inner side wall of each Specification of Letters Patent.

Application filed November 2, 1911.

a plurality Patented Oct. 22, 1912. Serial No. 658,220.

side air chamber. Fig. 7 is an elevation of the slide between which and the inner side wall of the chamber the slide ShOWn in Fig. 6 is interposed. Fig. 8 is a transverse section taken in the plane indicated by the line ac of Fig. 5. Fig. 9 is a plan view showmg the portion of my improvements that is disposed on the fire or bridge wall of the furnace.

Similar letters designate corresponding parts in all of the views of the drawings, referring to which:

A is the fire-box of a furnace.

B is the bridge or fire wall of the furnace, and C is a chamber disposed in and extending lengthwise of the said bridge or I however, have it here understood that without involving departure from the scope of my claimed invention, one end of the chamber C may be permanently closed in suitable manner in which event the chamber would have but one end adapted to be put in communication with the atmosphere and but one door for controlling the said end.

In its top the chamber O is provided with of vertically disposed apertures E, and each of these apertures is arranged in front of an upright bafiie plate F of V- shape in horizontal section, Figs. 1, 2 and 9. Each of the said baffle plates F is upright and of V shape in horizontal section throughout its length, and the concavity at the front of each is open at its upper end. By virtue of this provision it will be understood that the draft in the smoke stack or uptake, not shown, will draw air from the chamber G in jets through the apertures E and up through the concave forward sides of the baflie plates and rearward over the upper ends of said plates. It will also be understood that the unconsumed gases from the fire-box will be received in the concavities of the bafie plates and there commingled with the air, after which the commingled air and gas will pass upward and rearward over the upper ends of the bafiie plates. Some of the unconsumed gases from the fire-box will also travel through the mesh of battle plates and be commingled with some of the air from the chamber C. Consequently it will be observed that practically all of the gases that pass to the bridge or fire wall will be effectually consumed before they leave the vicinity of said bridge or wall.

\Vhile I prefer to make the baffle plates F of V-shape or right-angle form in cross-section, I do not desire to be understood as confining myself to battle plates of any particular shape, inasmuch as the said plates may be of any suitable shape in horizontal section that will afford concavities at the forward sides of the plates, without involving departure from the scope of the invention as claimed.

I would. also direct attention to the fact that because of the chamber C being arranged in the bridge or fire wall B, and in proximity to the fire in the fire-box, the air supplied through the apertures E will be in a heated state, and that this also will contribute to the complete and perfect consumption of the gases and other products of combustion.

The side air chambers G of my improved air-feeding means are arranged in the side walls of the fire-box A with their inner sides flush with the inner sides of said side walls and their bottom walls about two courses of bricks above the grate H. In the inner side wall a of each chamber G are two (more or less) rows of apertures b and within each of said chambers is a guideway a formed between the inner side wall and lower and upper ribs cl, Fig. 8, spaced therefrom. Each of the said guide-ways 0 receives a slide I that is arranged next to the inner side wall of the chamber, and a slide J that is interposed between the slide I and the ribs 03. The said slides I and J are provided at their forward ends with handles 6 so that they can be conveniently ma nipulated, and the slide I is provided in its forward portion with two (more or less) rows of apertures f, while its rear portion has two (more or less) longitudinal slots 9 formed in it. The slide J has two (more or less) longitudinal slots h formed in its forward portion, and two (more or less) rows of apertures z in its rear portion; and it is also provided with lateral projections j, arranged intermediate the apertures z', and designed to rest and be moved in the slots 9 of the slide I.

Each slide I can be operated independently of the adjacent slide J and vice versa, and by reference to Fig. 5 it will be manifest that the openings in the slides are so disposed that by manipulation of the slides the openings 79 may be opened or closed as desired, and the amount of air supplied the fire-box through the chambers G controlled. For instance by moving the slides I, the openings Z2 in the forward portions of the chambers G can be opened or closed, while by moving the slides J, the openings 6 in the rear portions of the chambers G can be opened or closed. Again by adjusting both the slides I and the slides J, all of the openings b can be entirely closed or fully opened, in the discretion of the fireman, or can all be closed to a desired extent according to the condition of the fire in the box A.

By virtue of the slides I and J in combination with the perforated walls of the chambers G, the fireman is enabled to control the air at the places where it enters the furnace, this being necessary in order to bring about a thorough mixture of the volatile gases and oxygen and maintain perfect combustion.

Experiment with an ordinary furnace lacking my improvements has demonstrated that when the furnace heat is at the combustion point and fresh coal is thrown into the fire-box, the generation of volatile gases is started at once by the furnace heat augmented by the fact that the ash pit doors are opened. Consequently there is imperfect combustion due to the lack of oxygen to mix with the rapidly rising volatile gases, and the result is black smoke. When, however, my improvements are properly in stalled and manipulated, the volatile gases will be consumed from the time of starting a fresh fire, and after such consumption all of the apertures b can be closed, whereupon when the ash pit doors IWI are opened, the heat can be extracted from the fixed carbon that is left in the live coals on the grate bars.

In all three parts of my novel apparatus, it will be noted that atmospheric pressure cooperates with the draft in the smoke stack or uptake in adequately supplying jets of air to the products of combustion; also, that the jets of air are heated precedent to being discharged into the fire-box, this latter because of the chambers G and G being adj acent the fire-box.

In the preferred embodiment of my invention, doors, similar to the door N of Figs. 1 and 5, are hinged to the face plate P of the furnace ad 'acent the forward ends of the chambers G and are used, as occasion clemands, to open and close communication between the atmosphere and the interiors of the chambers G.

In addition to the practical advantages hereinbefore ascribed to my novel furnace, it will be noted that my novel apparatus is simple and adapted to be readily installed, and that while the apparatus is highly efficient in operation, it embodies no delicate parts such as are liable to get out of order after a short period of use.

I have entered into a detailed description of the construction and relative arrangement of the parts comprised in the present and preferred embodiment of my invention in order to impart a full, clear, and exact unnot desire, however, to be understood as confining myself to the said specific construction and relative arrangement of parts, as such changes or modifications may be made in practice as fairly fall Within the scope of my claimed invention.

Having described my invention, What I claim and desire to secure by Letters-Patent,

1. In means for feeding air to furnaces, the combination with the fire-box of a furnace, of an air chamber arranged in a wall of the fire-box and having apertures in its inner side, at intervals of its length, and an end adapted to be put into communication with the atmosphere and also having longitudinal ribs spaced from said inner side, a slide arranged in the chamber and against the inn-er side thereof and having apertures at intervals of its length, the series of said apertures extending to a point adjacent one of its ends, and also having a longitudinal slot disposed between the series of apertures and its opposite end, and a slide arranged at the opposite side of the first-named slide, with reference to the inner side of the chamber, and having apertures at intervals of its length disposed opposite the longitudinal slot of the first-named-slide and also having a lateral projection disposed and movable in said slot and further having a longitudinal slot disposed opposite the series of apertures of the first-named slide.

2. In means for feeding air to furnaces, the combination with the fire-box of a furnace, of an air chamber arranged in a Wall of the firebox and having apertures in its inner side at intervals of its length and also having an end adapted to be connected with the atmosphere, a slide arranged in the chamber and against the inner side thereof and having apertures at intervals of its length, the series of said apertures extending to a point adjacent one of its ends, and also having a longitudinal slot disposed intermediate the series of apertures and its opposite end, and a second slide arranged at the opposite side of the first-named slide, with reference to the inner side of the chamber, and having apertures at intervals of its length disposed opposite the longitudinal slot of the first-named slide and also having a longitudinal slot disposed opposite the series of apertures of the first-named slide.

3. In means for feeding air to furnaces, the combination with the fire-box of a furnace, of an air chamber arranged in a wall of the fire-box and having apertures in its inner side, at intervals of its length, and also having an end adapted to be connected with the atmosphere, and slides adjustable inclependently of each other; the said slides being arranged side by side and close together and also close to the inner side of the chamber and having apertures so relatively arranged that adjustment of one slide relative to the other will jet air into the portion of the fire-box adjacent the open end of the chamber, only, and adjustment of the other slide relative to the first mentioned slide will jet air into the portion of the fire-box remote from said end, only.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WILLIAM W. EVANS.

I'Vitnesses GEO. F. GooDwIN, ARLINE Rosn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.