US2718841A - Wall flue - Google Patents

Description

A. KINKEAD WALL FLUE Sept. 27, 1955 Filed Aug. 3, 1951 A r ron/ver 3 lie below the plate 16 and below the neck 31 where the change in shape occurs. They preferably lie near the top of the rectangular portion of the flue pipe 15, and it is important that they lie beneath the plate 16. There may also be another series of vent openings 35 through the pipes outer wall, a short distance above the lower end of the ilue 15. These vent openings 34 and 35 have a very important eifect. Hot air owing upwardly through the passageway 22 sucks in air through the vents 34 and 35, thereby inducing a flow of relatively cool air inside the house walls 10, llland studs 13, 14 and around the pipe 15. This cool air movement aids in keeping the flue pipe 15 and the building walls 10, 11 and studs 13, 14 cool and at a safe temperature.

Installation is made after framing and before the completion of the walls. Before or after the heater 12 is put in place, the ceiling plate 16 is cut out to provide an opening for the upper end of the flue 15. Then an angle plate 36 is secured at one side of the cut-out. Next the flue pipe 15 is put in position, and its anges 25 are secured to the heater 12. Then a second angle plate 37 is secured to the header 16 around the cut-out, positioning the upper end of the ilue pipe 15. Clearances 38 are provided on four sides between the pipe 15 and the plates 36, 37 so that cooling air in the required quantity can flow down between the walls and the flue from the space above the plate 16.

' The builder can then complete the walls 10 and 11 across the studs 13, 14. There will be a clearance of at least 3A; of an inch between the fiue pipe 15, and the walls.

There will be greater clearance than that between it and the studs 13, 14. When the installation is completed, the ue pipe 15 will be enclosed inside the walls with its neck 31 sticking out over the ceiling plate 16.

The flue pipe 15 is preferably short enough so that the openings 34- will be below the angle plates 36, 37 and long enough so that the coupling 23 will be above them. By way of example only, it may be stated that flues 15 may be made in 3, 4, and foot lengths which will take care of most wall installations. Such ilues may be practically any size to fit between wall studs. One size that has proven satisfactory is five inches across at the top coupling 23 and changing shape so its rectangular dirnension is about 2'/s X 7%. In this particular pipe, there are seven openings 34 on each wide wall of the pipe and two openings on each end wall making eighteen in all. The openings 34 are about Mi in diameter and are located about one inch below the lower end of the tapered neck 31, where the change in shape begins. There are, in this illustrative example, the same number of openings of the same size as the openings 34, and they are located about 41/2 above the lower end of the flue 15. It will be obvious that these dimensions may be departed from and are given to illustrate a pipe that has been found satisfactory.

When the flue pipe 15 is in use, the hot ue gases from the heater 12 pass through the flue opening 29 into the inner pipe 20. Hot air will then rise inside the passage 22 between the pipe walls 2i) and 21. As it rises, the hot air current sucks in cool air from outside the ue pipe 15, through the openings 34 and 35. This suction causes air from outside to be sucked into the space bounded by the walls lil, 11 and studs 13, 14 through the clearances 33.

This current of cool air mixes with the warm air in the passage 22 and keeps the ilues outer wall 21 cool. It also flows past the studs 13, 14 and the house walls 10, 11 and the angle plates 36, 37 and keeps them cool. Cool air is constantly drawn in from above the ceiling plates 16, and the inside of the house wall is kept cool.

What is claimed is:

l. An all-metal ue installation, in combination with two spaced-apart imperforate building walls separated by studs, a ceiling plate, and a wall heater in between said walls, comprising a double-walled all-metal rectangular ue pipe having an inner rectangular iniperforate wall in CTL A 4 which the products of combustion are conveyed upwardly from said heater up through said ceiling plate; and an outer wall spaced from said inner wall and from said building walls and said studding and passing upwardly through a gap cut in said ceiling plate, space being provided between at least a portion of said outer pipe wall and said ceiling plate for the passage of air therebetween; said ue pipe having a neck starting just above said ceiling plate and terminating in a generally round coupling at the upper end of said flue pipe for attachment to a round double-walled ue pipe, saidk outer pipe wall being provided below said neck and below said ceiling plate with a plurality of perforations therethrough whereby air is caused to flow through said perforations when said inner pipe wall becomes warm, which ow of air in turn causes air to ilow from above said ceiling plate to the space below said ceiling plate and between said building walls and studs adjacent said ue pipe; a ilange at the bottom of said outer pipe wall adapted to provide space for attaching said flue pipe to said heater; and a plurality of perorations in said outer pipe wall spaced a short distance above said flange to introduce a further ow of air through the space between said inner and outer pipe walls.

2. A ilue installation in between the studded walls of a building, including in combination with the two walls, the studding, and the ceiling plate, a double-walled ilue pipe having an inner metal pipe to convey the products of combustion and an outer metal pipe spaced from it and spaced inwardly from said building walls and said studding, both said pipes passing upwardly through a gap cut in said plate; and a bracket member secured to said ceiling plate and having portions to position said flue pipe and portions providing a passage so that air can pass down from above said ceiling plate and around said outer pipe, said outer pipe having perforations therethrough below said bracket and said ceiling plate, so that cool air will ilow down into said openings and thence up through the space between said inner and outer pipe walls.

3. An all-metal ilue installation in combination with two spaced-apart imperforate building walls separated by studs, with a ceiling plate and with a wall heater in between said walls, comprising a double-walled, allmetal, generally rectangular flue pipe having an inner generally rectangular irnperforate wall in which the products of combustion are conveyed upwardly from said heater to a locus above said ceiling plate; and an outer wall spaced substantially uniformly from said inner wall and spaced from said building walls and said studs, and passing upwardly through a gap cut in said ceiling plate, space being provided between at least a portion of said outer pipe wall and said ceiling plate for the passage of air therebetween; said ilue pipe having a neck starting just above said ceiling plate and terminating in a coupling at the upper end of said ue pipe for attachment to a round double-walled ilue pipe, said outer pipe wall being provided somewhere below said ceiling plate with a plurality of perforations therethrough whereby air is caused to ow through said perforations when said inner pipe wall becomes warm, which ilow of air in turn causes cool air to flow from above said ceiling plate to the space below said ceiling plate and between said building walls and studs adjacent said due pipe.

4. An all-metal flue comprising an inner substantially rectangular elongated imperforate wall forming an inner a flue pipe and an outer substantially rectangular elongated wall concentrically disposed with respect to said pipe defining a passage therebetween, said pipe and passage having the ends thereof open, the upper end portions of the inner and outer walls being tapered to form a coupling means carried by the upper ends of said walls, said coupling means having an apertured portion extending from the outer wall to the inner wall forming a spacer means thereof, a lower supporting bracket carried at the lower ends of said walls, said bracket having a portion extending between the inner and outer walls forming a lower spacing means therefor, said outer wall being provided intermediate said neck portion and said lower supporting bracket with a plurality of perforations therethrough, said perforations being disposed in upper and lower sets with said upper set being adjacent the tapered neck portion.

5. An all-metal ue comprising an inner substantially rectangular elongated imperforate Wall forming an inner flue pipe and an outer substantially rectangular elongated wall concentrically disposed with respect to said pipe defining a passage therebetween, said pipe and passage having the ends thereof open, the upper end por tions of the walls being tapered to form a neck portion terminating in a substantially circular outlet, a coupling means carried by the upper ends `of said walls adapted to attach said flue to a second ue pipe, a'lower supporting bracket carried at the lower ends of said walls, said coupling means and supporting bracket each having a portion thereof extending from the outer wall to the inner Wall forming upper and lower spacing means respectively for said walls, said upper spacing means having openings therethrough intermediate the inner and outer walls, said outer wall being provided intermediate said 'neck portion and said lower supporting bracket with a plurality of perforations therethrough, said perforations being disposed in upper and lower sets with said upper set being adjacent the tapered neck portion, said lower supporting bracket having outwardly extending supporting flanges adapted to attach said flue to a heater for conducting the products of combustion therefrom up through said pipe whereby air is caused to iiow through said perforations and passage when said inner Wall becomes warm.

6. An all-metal flue comprising an inner substantially rectangular elongated imperforate wall forming an inner ue pipe and an outer substantially rectangular elongated wall concentrically disposed with respect to said pipe defining a passage therebetween, said pipe and passage having the ends thereof open, the upper end portions of the walls being tapered to form a neck portion terminating in a substantially circular outlet, a coupling means carried by the upper ends of said walls adapted to attach said ue to a second ue pipe, a lower supporting bracket carried at the lower ends of said walls, said coupling means and supporting bracket each having an apertured portion thereof extending from the outer Wall to the inner wall forming upper and lower spacing means respectively for said walls, said outer wall being provided intermediate said neck portion and said lower supporting bracket with a plurality of perforations therethrough, said perforations being disposed in upper and lower sets with said upper set being adjacent the tapered neck portion, said lower supporting bracket having outwardly extending supporting anges adapted to attach said tlue to a heater for conducting the products of combustion therefrom up through said pipe whereby air is caused to flow through said perforations and passage when said inner wall becomes warm.

References Cited in the file of this patent UNITED STATES PATENTS 236,141 Beecher Jan. 4, 1881 1,484,328 Heimbach Feb. 19, 1924 2,304,500 Hoesli Dec. 8, 1942 2,634,720 Thulman Apr. 14, 1953

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