Chimney-top and ventilator.

Application filed April 14,1902. Serial No. 102,742. (No model.) a continuous air-chamber 5 between the walls of the casing and the walls of the extensionflue 4. The chamber thus formed is suitably closed at the bottom.to provide a base-ledge 6, adapted to support the ventilator-casing upon 55 the chimney. Directly above the ledge 6 there are formed in all of the walls of the casingsuitable openings 7, provided with oppositelydeflected plates 8 and 9, respectively arranged at the top and bottom of the openings, and 60 the plates may comprise portions of the casingwalls cut through to form the openings 7, or separate plates may be suitably attached to the Avails to operate as funnels for the openings. The flue 4 extends from the base-ledge 65 a suitable distance toward the top of the casing to direct upward air-currents blown into the chamber 5 through any of the openings .7, and thereby operate to accelerate updraft in the chimney or ventilating-flue when wind- 7c currents blow against the casing in a horizontal direction. Inorder to prevent downdraft through the flue when wind blows down the chimney, I have provided a separator 10, of suitable width and depth, arranged centrally 75 and lengthwise in the top of the casing to divide the outlet into separate flues 11 and 12 and operating as a hood over the extensionflue 4. The downdraft through flues 11 and 12 is intercepted by diaphragms 13, which ex- 80 tend in reversely-declined positions from under the separator toward the opposite side walls of the casing and project through openings 14, formed in each side wall for the exit of the intercepted downdraft and the.outflow 85 of smoke or other gases from flue 4 induced by the downdraft. The diaphragms 13 also operate as hoods over the side portions of the air-chamber 5 and overlap the sides of the flue 4 and are formed with integral vertical bent 90 portions 15, underlapping the separator and forming a throat 16, extending from end wall to end wall of the casing, in free communication with the flue 4, the surrounding air-chamber 5, and the flues 11 and 12. The tops of the 95 side openings 14 are provided with plates 17, arranged to deflect down currents of wind and produce a siphonic action to draw both the downdraft and the updraft through openI ings 14. ¹⁰

To all· whom it may concern:

Be it known that I, John F. Le Beau, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have 5 invented a new and useful Improvement in Chimney-Tops and Ventilators, of which the following is a specification.

My invention relates to a chimney-top and ventilator, and has for its object to provide a io device of the above character adapted to prevent downdraft through chimneys and ventilating - shafts under all conditions established by the different directions of wind-currents and offering no resistance to the exit of 15 gases or air when the atmosphere is undisturbed.

The object of my invention is accomplished by providing a super imposable.top for chimneys andventilating-shafts having a flue cen20 trally housed therein adapted to extend the chimney-flue, said extension-flue being surrounded by an air-chamber provided with wind-openings at the base of the chamber on all sides of the ventilator to accelerate the up25 draft of the chimney when the wind is blown against the chimney in a horizontal direction and by providing means to effect the escape of the gases from the chimney when the wind blows downward thereon, comprising a sep30 arator and deflecting-diaphragms arranged to direct and intercept a downward draft and discharge it with the gases through side openings formed in opposite walls of the ventilator-top.

In the drawings, Figure 1 is an isometric view of a chimney-top and ventilator constructed in accordance with my. invention. Fig. 2 is a transverse vertical section through the same on the line X X of Fig. 1. Fig. 3 is a 40 longitudinal vertical section through the same on the line Y Y of Fig. 1, and Fig. 4 is a horizontal section on the line Z Z of Fig. 1.

In the drawings, 1 designates a rectangular ventilator-casing of sheet metal having abase 15 arranged to inclose and telescope over a brick stack 2, which is provided with a central flue 3 for the exit of gases of combustion or ventilation. In the lower end of the casing 1 there is located a flue 4, continuing for a distance 50 the chimney or ventilating-flue and forming

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In operation a chimney or ventilating top constructed in accordance with my invention and mounted upon a chimney or ventilatingshaft is adapted to accelerate updraft in the 5 flue whatever may be the direction of the aircurrents. The openings 7,located at the base, one on each side of the air-chamber 5, are adapted to admit horizontal currents of wind into the chamber from whatever direction io they may come, where they are directed upward along the walls of the flue 4 and deflected by diaphragms 13 through the throat 16, thereby increasing the draft through flue 4 to the outlet-flues 11 and 12.

_ Under certain conditions a chimney or ventilating-shaft located beside tall buildings is inoperative by reason of induced currents of air that blow down into the flue-openings and check the updraft, which is also obviated by 20 mounting thereon a ventilator of my construction. In such case when the wind blows down upon the outlet of flues 11 and 12 the diaphragms 13 deflect the downdraft through the side openings 14, which forms a suction 25 that draws through the side openings, the gases passing upward through the throat 16 thereby assisting the draft in the flue 3 under down currents of air as well as under horizontal currents.

By use of the plates 8 and 9 at the base• openings 7 the openings are made funnelshaped, thereby increasing the force and velocity of the up currents. Horizontal currents directed against a side of the ventilator will be deflected upward through both open- Things 7 and 14 of that side.