US1842941A - Flue purifier - Google Patents

Description

T B. K'EOGH FLUE PURIFI ER Jan. 26, 1932.

Filed June l4, 1930 I N V EN TOR. 720m IZZY ATTORN Patented Jan. 26, 1932 UNirs STATES THOMAS B. KEOGH, OF NEW YORK, N. Y.

FLUE runIrIEn Application filed June 14, 1930. Serial No. 461,187.

This invention relates to devices for use in connection with the flues of stoves, ranges and the like of various kinds and classes, to purify the exhaust gases or products of combustion discharged through the flues of apparatus of this class; and the object of the invention is to provide a device which may be arranged directly upon the flue discharge of a stove or range or may constitute a part of a flue pipe leading therefrom and involving a liquid container exposed to the prod nets of combustion discharged through the flue whereby the liquid will be heated and the vapor discharged therefrom utilized for the purpose of neutralizing or eliminating gaseous substances in the exhaust and to otherwise purify such exhaust; a further object being to provide means for screening the products discharged from the device after being subjected to the vapor and/0r steam thereof; a further object being to provide bafliing means associated with the liquid container to direct the vapor and steam toward the flue passage surrounding said container; a further object being to provide means for introducing fresh air into the flue passage of the device at the lower end portion thereof to encourage the circulation of the exhaust gases and to localize this circulation, preferably at the front portion of the device; and with these and other objects in view, the invention consists in a device of the class and for the purpose specified which is simple in construction, efficient in use, and which is constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which:

Fig. 1 is a view, diagrammatically illustrating a cooking stove, and indicating one of my improved devices arranged thereon.

Fig. 2 is an enlarged, sectional, detail View through the device shown in Fig. 1.

Fig. 3 is a plan and sectional view of the structure shown in Fig. 2, the section being 50 on the line 33 of Fig. 2; and,

Fig. 4 is a partial section on the line 4 4: of Fig. 3.

In Fig. 1 of the drawings, I have diagrammatically indicated at 5, a stove or range which may be of any of the conventional types or forms, employing coal, gas, fuel oil or the like as a fuel or an electric heating unit. At 6, I haveindicatedthefluedischarge of the range, part of which is shown in Fig. 2 of the drawings. Mounted upon and encircling the flue discharge 6, is one of my improved devices 7, consisting of an outer housing 8 which is of a cross sectional form corresponding to the flue discharge 6, and is shown elliptical in the accompanying drawmgs as seen in Fig. 3. The housing 8 forms what may be termed a flue pipe and may in fact, constitute the flue pipe of apparatus of the class under consideration.

Arranged in the pipe 8 is a container 9, supported upon cross bars 10, the central portions of which are depressed to form an alignment seat 11, to centralize the container 9 in the pipe 8, and the ends of the bars 10 are bent downwardly and extended beneath the pipe 8 to form supporting feet 12, it being noted that the pipe 8 is offset outwardly as seen at 13, where thebars are located, in order that the lower end of said pipe may fit snugly around the flange 6a of the discharge 6. Supported in the pipe 8 above the top of the container 9 is a removable screen 14, which in the construction shown, has four projecting pins 15 seating in grooves formed in the top of the pipe 8. This screen is preferably of a very finemesh so as to function as a strainer for straining the products of combustion or exhaust which are discharged therethrough. Attached to the top of the container 9 are four outwardly extending a guide and alignment arms 16, which serve to centralize the top of the container in the pipe 8 and also to reinforce the same, said arms being removable with the container when the same is removed from the pipe for cleaning or other purposes.

I also preferably support above the container 9, a baflle plate 17 which is of a contour corresponding to the cross section of the container and pipe. The central portion of this plate is slightly coned and the peripheral edge 17a is bent or flared upwardly at a point substantially in alignment with the wall of the container 9 so as to form a contracted discharge 18, between the baffle plate and the top of the container 9, and this flange also forms a restricted passage 19, between its edge and the wall of the pipe 8. The bafiie 17 i supported in connection with the central portion of the screen 14 as seen at 20.

From the foregoing, it will be apparent that the products of combustion rising through the discharge 6 will pass onto the bottom of the container 9 and upwardly around said container through the annular passage 21, the only obstruction of which is formed by the bars 10. These products of combustion extend to the flange 17a of the baffle 17 and around the same into the chamber 22 above said bevel and out through the screen or strainer 14:, whereas vapor or steam from the chamber 23 arranged below the bevel and above the container 9 is dis charged through the annular passage 18 and mingles with the products of combustion prior to its passage through the annular discharge 19 into the chamber 22 and serves to eliminate, to a large degree, the gaseous elements of the flue discharge and to neutralize the same, as well as to pu -ify the flue discharge prior to its transmission through the strainer, the latter also serving to retain carbon, soot or greasy matter within the device and prevent its discharge into the room or compartment in which the apparatus is arranged.

To aid in accomplishing the results above specified, and to encourage the circulation of the products of combustion, and still further to localize them primarily at the front side of the device 7, I form two fresh air vent passages 2l at the front side of the device 7, adjacent the lower end thereof.

These vent passages are formed by cutting portions of the pipe 8 and bending the cut portions inwardly to form beveled walls 25 as indicated in Fig. 4 of the drawings so that the current of fresh air is directed upwardly into the chamber 21, thus preventing the direct discharge of the products of combustion outwardly through the openings 24.

While my improved device is designed primarily for use in connection with apparatus of the class under consideration wherein the products of combustion are discharged directly into the room in which the apparatus is arranged, the same may be applied to other apparatus of this class; and various changes in and modifications of the construction herein shown and described may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is

l. A flue purifier of the class described comprising a pipe through which products of combustion from a flue discharge are adapted to pass, a liquid container, means for supporting said liquid container within said pipe in such manner as to expose the bottom and entire side walls of the container to the products of combustion discharged through the flue, and a strainer arranged within the pipe in spaced relation to and above the top of said container and detachable with respect thereto and forming a cloure for the upper end of said pipe.

2. A flue purifier of the class described comprising a pipe through which products of combustion from a flue discharge are adapted to pass, means for supporting a liquid container within said pipe in such manner as to expose the bottom and entire side Walls of the container to the products of combustion discharged through the flue, means disposed above said container Within said pipe for directing vapor and steam from said con tainer into the products of combustion circulated upwardly around the walls of said 0011- tainer, and means in one side of said pipe adjacent the lower end of the container for introducing fresh air into the products of combustion passing upwardly around said container.

3. A flue purifier of the class described comprising a pipe through which products of combustion from a flue discharge are adapted to pass, means for supporting a liquid container within said pipe in such manner as to expose the bottom and entire side walls of the container to the products of combustion discharged through the flue, means disposed above said container within said pipe for directing vapor and steam from said container into the products of combustion circulated upwardly around the walls of said container, means in one side of said pipe adjacent the lower end of the container for introducing fresh air into the products of combustion passing upwardly around said container, said last named means involving ports having beveled walls for directing said fresh air upwardly.

a. A flue purifier of the class described comprising a pipe through which products of combustion from a flue discharge are adapted to pass, means for supporting a liquid container within said pipe in such manner as to expose the bottom and entire side walls of the container to the products of combustion discharged through the flue, means disposed above said container within said pipe for directing vapor and steam from said container into the products of combustion circulated upwardly around the walls of said container, means in one side of said pipe adjacent the lower end of the container for introwardl and a strainer device arran ed in said pipe above and in spaced relation to said second named means.

5. A device of the class described comprising a tubular housing, cross bars disposed at the lower end of said housing, a containerv mounted in said housing and seating upon said bars, said container forming an annular passage between it and said housing, a

strainer device detachably supported in con nection with the upper end of said housing and arranged above and in spaced relation to said container, and one side wall of the lower end portion of said housing being stamped inwardly to form an intake passage having an upwardly inclined beveled wall whereby fresh air may be introduced into said passage.

6. A device of the class described comprising a tubular housing, cross bars disposed at the lower end of said housing, a container mounted in said housing and seating upon said bars, said container forming an annular passage between it and said housing, a strainer device detachably supported in connection with the upper end of said housing and arranged above and in spaced relation to said container, one side wall of the lower end portion of said housing being stamped inwardly to form an intake passage having an upwardly inclined beveled wall, and a baflie plate supported intermediate said strainer and the upper edge of said container and the peripheral edge of which is arranged over said annular chamber.

7 The combination with the flue discharge of a range 01": the class specified, of a liquid container, an elliptical casing encircling said container and fitting over the flue discharge of the range and forming an annular passage around said container, whereby products of combustion from said range may pass upwardly onto the bottom and over the side walls of said container, and means for introducing fresh air into the annular passage at the lower end of said container.

8. The combination with the flue discharge of a range of the class specified, of a liquid container, an elliptical casing encircling said container and fitting over the flue discharge of the range and forming an annular passage around said container, whereby products of combustion from said range may pass upwardly onto the bottom and over the side walls of said container, means for introducing fresh air into the annular passage at the lower end of said container, and a screen cover detachably supported in connection with the top of said casing and disposed above and in spaced relation to said container.

9. The combination with the flue discharge of a range of the class specified, of a liquid container, an elliptical casing encircling said container and fitting over the flue discharge of the range and forming an annular passage around said container, whereby products of combustion from said range may pass upwardly onto the bottom and over the side walls of said container, means for introducing fresh air into the annular passage at the lower end of said container, a screen cover detachably supported in connection with the top of said casing and disposed above and in spaced relation to said container, and a bafile plate supported in connection with said cover above said container to form a peripheral vapor and steam discharge from said container into said annular chamber.

In testimony that I claim the foregoing as my invention I have signed my name this 11th day of June, 1930.

THOMAS B. KEOGH.

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