US1295953A - Rotatable ventilator-hood. - Google Patents

Description

A. M. BASMAN.

ROTA TABLE VENTILATOR HOOD.

APPLICATION flLED AUG. 15, 1913.

1,295,953. Patentd Mar. 4,1919.

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MMM w s, M my 33% wL W ANTHONY M. BASMAN, OF DETROIT, MICHIGAN.

Specification of Letters Patent.

BQTATABLE VENTILATOR-HOOD.

Patented Mar. 4., 19155.

Application filed August 15, 1918. Serial No. 249,946.

To aZZ whom it may concern.

Be it known that I, ANTHONY M. BASMAN, a citizen of the United States, and residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Rotatable Ventilator-Hood, of which the following a specification.

This invention relates to rotatable hoods adapted to be mounted on the upper ends of yentilator fines or pipes, and its object is to so construct a hood that wind blowing against it will pass up inside of the hood and then down and out through a discharge opening in the side away from the-wind. It further consists in a. ventilator hood which will be strong and rigid in construction, and in which the various parts are so positioned that air currents passing into said hood through proper openings from the outside will have an asplrating effect upon the air or gases within the ventilating flue or pipe upon which the hood is mounted.

This invention consists, in combination with a thimble constituting a part of the ventilating flue or pipe, of a rotatable member comprising an outer upwardly tapering shell having a discharge opening and a vane to hold this opening away from thewind. It further consists in a deflector of cylindrical shape within the shell to compel the air currents from the outside to ascend within the shell and then permit them to pass out through the discharge opening in the shell together with the air and gases ascending in the ventilator pipe.

In the accompanying drawings, Figure l is a side elevation of this improved ventilator. Fig. 2 is a view of the same, partly in bottom plan and partly horizontal section on the line 1-1 of Fig. 1. Fig. 3 is a central vertical section on the line 33 of Fig. 2. Fig. 4 is a plan of the ventilator.

Similar reference characters refer to like parts throughout the several views.

While this rotatable hood may be mounted directly on the upper ends of ventilator pipes or flues, I prefer to provide a cylindrical thimble 1 which will fit such pipes or flues. On this thimble, the hood will-be rotatably mounted in any desired manner but for hoods of moderate dimensions I prefer to secure an upright rod or shaft 2 in position within the thimble by means of the braces 3 and 4, each preferably provided with three arms.

The hood is made up of a cap 5, a vane 6 secured to the top of the cap, a shell 7 and a cylindrical deflector 8. The cap 5 is substantially conical with a flattened portion under the vane and in the center on the in side is'secured the socket 9 to receive the bearing balls 10, the recess for the balls being deep enough to receive the upper end of the rod 2 and thereby properly position the hood. Ext-ending down from this socket are the straps 12 (preferably three) which are connected at their lower ends to the de flector 8. One side of the hood (the left in the drawings) will always be toward the wind and the opposite side and discharge opening will always be away from the wind. In this description and claims he former will be termed the windward and the latter the leeward side of the hood.

The lower end of this deflector is a complete cylinder 13 and is only slightly larger than the upper end of the thimble 1 around which it turns freely and by which it is centered. This deflector extends up into the shell and is connected to the lower part of the shell by the vanes 14, 15 16 and 17 which are parallelto the line 33 of Fig. 2 near that line but deflect therefrom as they near the flattened portions 18 of the shell. The shell isspaced away at the bottom around the deflector 8 between the edges of the horizontal plate 19 which edges are parallel and tangential to the deflector 8.

The vertical leeward edges 20 of the sheet constituting the hood are also parallel to each other and to the edges of this plate 19 to which they are attached. Inclined slats 22 may extend between the edges 20 across the discharge opening 25 of this ventilator hood, but these slats may be omitted if desired, their office being only to stiffen the structure and to shed rain when the hood is in the open air.

The cap 5 is formed with a substantially flat lip 24 which extends across the top of the discharge opening 25. It will be noticed that the vane 6 is central with the discharge opening. The deflector 8 is not a complete cylinder but the distance across between the bottom of its upright edges 26 is substantially the Width of the discharge opening 25. The bottoms of these vertical edges 26 are preferably bent out parallel to each other and attachto the parallel edges of the plate 19. This plate is formed with a flange 21 that extends down into the cylindrical band 13 to which it is secured. The action of this hood is as follows. 7

The vane 6 will hold-the opening'25 leeward of the wind so as to take. advantage of what aspirating efi'ect there maybe. As the shell 7 of the hood tapers upwardly, the spaces betweenthe shell 7, the deflector 8 and the vanes 14: to 17 will, taper upwardly. The positions of these vanes are such and the spaces between them taper in such a manner that comparatively strong jets of air will rise I around one half the circumference of the deflector and these jets will together have a siphoning action on the gases in the thimble 1. These jets will strike against thecap 5 and be deflected toward the only portion where there are no jets,.that is, toward the opening 25. In addition, the air or wind which is caught between the lower portions ofthe flat sides 18 of theshell and the vanes 17 will also pass up into the hood and at once pass out laterally through the opening 25, producing an aspiratingeffect on the gases and air within the deflector and the thimble 1,

Theproportions and sizes of the various parts may all be changed' by those skilled in the art without departing from-the scope of my invention as defined by the following claims.

I claim 2- 1 I 1. A rotatable ventilator hood comprising an upwardly tapering shellha-ving a side the-shell and of less diameter'than the shell, and vanes'between that portion of the shell which is opposite the sideopening therein and the deflector and constituting upwardly tapering air-passages, said deflector termi- Gopies of this patent may be obtained for nating in line with said side opening in the shell, and means to rotatably support sald hood.

2. A-rotatable'ventilator hood comprising a shell having a side opening and means whereby wind may turn the shell so that said opening will be on the leeward side thereof, a semi-cylindrical deflector extending up into saidshell and having a portion of its edges extending substantially uprightly and connecting to the hood at the edges of said opening, a cap for the shell, upright vanes between the shell and deflec: tor, and means to rotatably support the hood.

' 3. A rotatable ventilator hood comprising an upwardly tapering shell having a side .,opening, a substantially conical cap for the gular side opening, the edges of the vshell adjacent the opening extending upwardly, a cap for theshell having that portion adjacent the openingextending horizontally, a

cylindricaldeflector extending up into the shell and terminatingsubstantially at the middle of the height ofpsaid opening; and vauesbetweenthe portions of the shell and deflector-opposite said opening to form tapering air passages.

ANTHONY. M. BASMAN.

five cents each, ,by addressing the Go'mmissionerof Patents, Washington, DI G.

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