US744570A - Chimney-top. - Google Patents

Description

No.'744,570. PATENTED Nov. 17, 1903.

Y B. H. LB BEAU.

CHIMNEY TOP.

APPLmATimI FILED DEC. 5, 1902.

no MODEL.

THE NDRR S ITND WASHINGTON D C Y WM.

Fat vented November 17, 1903.

UNITED STATES PATENT FFICE.'

EDWIN H. LE BEAU, OF TOLEDO, OHIO.

C HIM N l' iY-TO errrcrrroA'rIoN forming part of Letters raters n 744,570, dated November 17, 1903.

Application filed December 5, 1902. I Serial No. 134,007. (No model.)

- To all whom, it mag concern:

Be it known that I, EDWIN l-L-LE BEAU, a citizen of theUnited States,residing at Toledo,

inthe county of Lucas and State of Ohio, have inafter described, and illustratedin the drawings, in which- Figure l is an isometric View of my invention, and Fig. 2 is a section through the same on line X X of Fig. 1.

In the drawings, 1 designates a rectangular shell of sheet metal which forms the body of my chimney-top. The shell is open at the lower end and adapted to. telescope over the top of a chimney 2, as shown in Fig. 2, and.

the walls of the shell extend above the top of the chimney a distancenot less than the width of an end wall 3. In each of the side walls 4 of the shell there is provided a rectangular draft-opening 5, extending from end'wall to end wall. 7 lower edges are each at adistance below the top of the shell equal to the width of an end wall 3 and of a vertical width equal to onefourth of such distance, the width. of an end wall 3 in the construction of my invention always determining the location of the lower edges of the side openings and the vertical width of each side opening being always equal to one-fourth of the width of an end wall of the shell. Across the top end of the shell at each side are provided cover-plates 6, extending across the top from end wall to end wall, which each cover one-fourth the area of the top, leaving the central one-half portion 6 open. Below and parallel with the top opening is provided a plate 7, of equal areaas the top opening and extending from end wall to end wall, and fromthe side edges of plate 7, at an angle of forty-five degrees, extend plates 8, forming with the plate 7 a deflecting-body 9, which in cross-section is in the form of a right-angled triangle. Within the shell are Openings 5 are so located that their also provided the deflecting-plates 10, extending'from end wall to end wall, the central portions 11 of which are parallel with the sides 4 and in the same vertical planes with the side edges of plate 7 and the inner edges of the top plates 6. The lower portions of plates 10 extend downward and outward from the central portions at an angle of forty-five degrees to a junction with the side walls 4'along the lower edges of the openings 5. The upper portions 12 of the plates 10 are angled inward and upward, preferably also at an angle of forty-five degrees, the angles being preferably in the same horizontal plane with the angle formed by the junction of the plates 8 and are of a width'to extend three-fourths the distance between the angles and the horizontal center lines of the latter plates and at right angles thereto, thereby forming the updraft-openings 13 between the plates 8 and the upper edges of the plates 10.

Thus constructed it is manifest that windcurrents blowing down through the chimneytop will be deflected by the plate 7 outward and downward along the sides 4 and by the plates 1O through the openings 5 and that such downdraft will create a suction that will increase the updraft through the openings 13, the discharge of the chimney gases being during such down currents from the side openings 5. Where the windcurrents are horizontal against either side wall of the chimney-top, whether from direct or diagonal directions, the air passing through the openings 5 on the side toward the wind will be deflected upward by plates 10 and 11 along the side 4 'andout of the top opening, or ifthe current across thetop opening is strong enough to prevent its exit from the top it will pass over the top of plate '7 and thence down the 0p posite side 4 and out of opening 5 on that side, producing a suction through one or both 0penings13 that will likewise aid the natural draft of the chimney. A horizontal current against either of the walls 3 and over the top of the chimney from either of said directions will be eddied in curves around the sides 4 and over the top that will likewise create a suction from both the top and side openings of the shell. When the air is still, it is manifest also that the deflector 9 offers little, if any, resistance to the updraft of the chimney through the openings 13, which have a capacity substantially equal to the chimney-flue. It will thus be seen that from whatever direction the wind may blow by the construction shown it is made to increase rather than diminish the natural draft of the chimney and that this result is accomplished by so locating and proportioning the openings and deflect-on plates and setting the deflector-plates at such angles to the openings to the sides and to each other that while offering no obstruction to the natural updraft of the heated gases they deflect the air-currents, from whatever direction they may come, past the updraftopenings 13.

\Vhat I claim to be new is In a chimney-top, a rectangular shell arranged to extend the chimney, side top plates of equal width, extending from end wall to end wall, forming a top opening extending from end wall to end wall, said top opening having a width equal to one-half of the width of the top of the shell, a rectangular opening in each side wall of the shell extending from end wall to end wall, the lower edge of each side opening being located a distance below the top of the shell equal to the width of an end wall, and the vertical width of each side openin g being equal to one-fourth of such diswidth with the top opening, said top plate of the deflector-body being disposed horizontal and located below the top opening a distance equal to one-half its width, and two equal deflector-plates inclined inward and downward at an angle of forty-five degrees from the ed of the top deflector-plate and forming therewith a triangularbody, a cross-section of which is a right-angle triangle, a deflector-plate for each side Opening extending from end wall to end wall of the shell, each side deflector-plate having a lower portion inclined upward and inward at an angle of forty-five degrees from the lower edge of a side opening, a central portion extending vertical parallel with the sides of the shell in the vertical plane of the inner edge of a side top plate to a horizontal plane equidistant between the top of the shell and a horizontal plane through the lower edges of the side openings, and an upper portion extending inward and upward at an angle of fortyfive degrees from the top of the central portion three-fourths of the distance to the adjacent lower plate of the deflector-body, and at a right angle thereto, as set forth.

In witness whereof I have hereunto set in y hand this 22d day of November, A. D. 1002.

EDlVIN II. LE BEAU.

lVi tnesses:

F. S. MAooMBE, S. V. MAcoMBE.

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