US1961800A - Ventilator - Google Patents

Description

June 5, 1934. G. STEEB 1,961,806 M VENTILATOR Filed June 25, 1931 2 Sheets-Sheet 1 fitness.-

June 5, 1934. G. STEEB 1,961,800

VENTILATOR Filed June 25, 1931 2 Sheets-Sheet 2 Patented June 5, 1934 UNITED STATES PATENT OFFICE 1,961,800 VENTILATOR George Steeb, Buffalo, N. Y. Application June 25, 1931, Serial No. 546,806

'1 Claims. (01. 98- 72) This" invention relates to improvements in is. shown in Fig. 3, and on which is mounted the ventilators, and more particularly to that type of supporting tube or stack extension 12 of my imventilator adapted to be placed at the top of proved ventilator; this supporting tube or stackventilating pipes or stacks, or chimneys, forming extension having its lower end fashioned to contniparts of buildings. form to the vent pipe or stack or other conduit on 60 One of the objects of my invention is the prowhich it is mounted. vision of an inexpensive ventilator of the type Ordinarily, when applying a ventilator of this mentioned, whichwill include a rotatable memkind to a vent pipe or stack, both the pipe or stack beror members arranged to operate easily so and the supporting tube of the ventilator are q -gyithatthe ventilator will be effective under very made cylindrical, as shown in the drawings, and 65 light air currents, as well as under high wind any suitable means for properly fastening the speeds, and one that will act efficiently and be supporting tube to the ventilator pipe or stack able to have its parts disassembled so that it may may be employed. Ordinarily the ventilator is be easily repaired. 5 braced or otherwise supported above the roof of 1 1 --Another object of my invention is the provision the building to which it is applied, but the man- 7 of. aventilator of 1 the type mentioned, which is ner of securing the same so as to assure its proper simple inconstruction, and in which provision is retention to the vent pipe or stack is of no immade for causing the upward flow of air or other portance so far as my invention is concerned gases through the vent pipe or stack to which it is The supporting tube has preferably an annu- 2d Iattanhed, under double suction action, and also lar internal rib 13 which bears against the upper 7 to effectively restrain the flow of the outside air edge of the vent pipe or stack 11, and its upper downwardly through the flue. end is open. It is provided near its upper end i With the above and other objects to appear with a circular series of vent openings 14. Surhereinafter, the invention consists in the novel rounding the upper end of this supporting tube 5 .fifeatures of construction, and in the arrangement is a comparatively short tube or sleeve 15, which and combination of parts to be hereinafter deis separated from the supporting tube by an an scribed and more particularly pointed out in the nular intervening space 16. This short outer subjoined claims. tube with parts attached thereto, to be described In the accompanying drawings: hereinafter, I term a suction-inducing member,

30. Fig.1 is a side elevation of my improved venand it is secured to a supporting bracket 1'7 rotat- 85 tilator. 1 I able on a rod 18 clamped or otherwise secured in Fig. 2 is a plan view of the same; transverse brace arms 19, disposed at right Fig. 3 is an enlarged vertical section taken on angles to each other and having opposite ends line 3-3, Fig. 1. secured to the wall of the supporting tube or stack -Fig. 4 is a horizontal section taken on line extension 12. The spindle or shaft is axially dis- 4+4, Fig; 3, looking upward or in the direction posed in the supporting tube, and its lower end of the arrow cr ossing said line. is fitted into a step bearing 21 fastened to a lower Fig. dis a horizontal section taken on line 5-5, transverse brace arm 22, the outer ends of which Fig.3. 1 r are also secured to the wall of the supporting 40 Fig. 6 is a horizontal section taken on line 6-6, tube.

Fig. 3-. The supporting bracket 17 has a U-shaped por- Fig. 7 is'a horizontal section taken on line 7-7, tion 23 entered in the supporting tube from its Fig. 3. a upper end, the transverse or cross member 24 of Fig. 8'is an enlarged vertical section through which is provided with an upwardly-extending 45-3the'spindle bearing taken on line 8-8, Fig. 5. bearing sleeve 25 having anti-friction bearings 'FigL-Q is an inner view of a portion of the lower 26, 27 at its upper and lower ends, respectively. or stack-surrounding rotatable suction-inducing Extending radially from the upper ends of the member of thedevice. 1 side or vertical members 28 of the U-shaped por- F'ig. '10 is an enlarged section taken on line tion 23 of said supporting bracket are supporting Fig 1 arms 29. These arms are positioned over the up Reference being had to the drawings in detail, per edge of the supporting tube or stack extenlike. numerals refer to like parts throughout the sion 12 and their outer ends are directed downseveralviews. 6 wardly, as at 3.0, and lie in contact with the inner The reference numeral 11 designates the usual surface of the tube or sleeve 15; suitable bolts 55.. vent pipe or stack,of"which onlythe upper end. or other fastening means being provided to seno cure said downwardly-directed portions to said tube or sleeve.

The side or vertical members 28 of said U- shaped portion are spaced from the wall of the supporting tube so that the bracket is free to rotate about the rod 18. Each of the anti-friction bearings and 27 comprises an outer raceway 31 fastened within the bearing sleeve 25, an inner raceway 32 fastened in any suitable manner to the rod 18, and anti-friction balls 33 arranged between said raceways. The supporting tube is thus held against movement lengthwise on the rod.

The bearing sleeve 25 is of considerable length, and extending from its upper end are additional supporting arms 34. These supporting arms are positioned over the upper edge of the supporting tube or stack extension 12 and the outer ends thereof are also fastened to the tube or sleeve 15. The supporting arms 29 and 34 of the supporting bracket are disposed at right angles and they therefore serve to maintain the tube or sleeve 15, thus assuring free and true action of said tube or sleeve, regardless of the speed under which it is rotated.

The surrounding tube or sleeve 15 is provided on its inner surface with a circular series of centrifugal or suction-inducing blades 35; they being disposed at an angle to the vertical, as best shown in Figs. 3, 5 and 9, and on the outer side of said tube a circular series of propeller blades 36 are arranged; these being somewhat of arcuate or V-formation. Any propeller blades capable of causing rotation of the tube or sleeve 15 by impact of the air currents thereagainst may, however, be employed.

The centrifugal or suction-inducing blades 35 correspond in number to the propeller blades 36, and each propeller blade is provided with securing flanges 37, 38 disposed at an angle to each other.

extend through the flanges of the centrifugal or suction-inducing blades, through one of the securing flanges of each of the propeller blades and through the tube or sleeve 15, so that such fastening means are common to both the centrifugal or suction-inducing blades and the propeller blades. therfastening means 41 are provided to additionally secure the flange of the propeller blades, and separate fastening means 42 are also provided for additionally fastening portions of the securing flanges of the suction-inducing blades.

It is to be noted that the vent openings 14 open into the space 16 between the upper end of the supporting tube 12 and the short surrounding tube or sleeve 15, or suction-inducing member as I term it; also, said suctiondnducing member is rotated due to the impact of the air current against the propeller blades 36, the centrifugal or suction-inducing blades 35 draw the air and gases upwardly out of the stack and through the vent openings 14; such air or gases being directed downwardly and escaping into the atmospheric air at the lower end of the suction-inducing member, as clearly shown by the arrows in Fig. 8.

The rod 18 extends upwardly a distance above the upper end of the supporting tube or stack extension 12 and has a cap or dome 43 rotatably arranged thereon. This cap or dome is preferably of conical formation, tapering upwardly, and

at its lower end is provided with a depending apron 44, while at its upper end it is provided with a short tubular portion 45 into which an anti-friction bearing 46 is arranged; this antifriction bearing comprising an outer raceway 47 secured in the tubular portion 45, an inner raceway 48 secured in any manner to the upper end of the rod 18, and anti-friction balls 49 interposed between the two raceways.

Fitted. over and fastened to the short tubular portion 45 of the cap or dome is a nipple 50 which is soldered or otherwise secured to said tubular portion and has its upper end exteriorly screw-threaded to receive a screw-cap 51. Upon removing the cap from the nipple 50, access to the anti-friction bearing may be had for properly lubricating the same. If desired, the nipple may be packed with a semi-fluid lubricant, the lubricant being retained between the raceways of the anti-friction bearing, and also between the anti-friction bearing and said cap.

The base of the cap or dome 43 is somewhat larger in diameter than the diameter of the tube or suction-inducing member 15, and thus overhangs the same, and at least a portion of the propeller blades 36 applied to the exterior of said tube or suction-inducing member. The cap or dome, being positioned for rotation on the rod 18, is necessarily co-axial with the supporting tube and the suction-inducing member 15.

A brace member 52 is arranged diametrically within the cap or dome, preferably above the depending apron 44. In this brace member 52 an anti-friction bearing 531s arranged, it comprising an outer raceway 54 secured in a suitable cup 55 formed on the brace member, or otherwise, an inner raceway 56 secured to the spindle or shaft 18 in any approved manner, and anti-friction balls 57 arranged between the two raceways.

On the inner surface of the conical wall of the cap or dome, a circular series of centrifugal or suction-inducing blades 58 is secured; these being arranged obliquely within the cap or dome and serving underrotation of said cap or dome to draw air and gases up through the stack and the supporting tube or stack extension 12, causing such air and gases to be directed toward the sloping wall of the cap or dome, the air or gases being thence directed downwardly and outwardly by said wall outside of the suction-inducing member 15. The air or gases so directed along the suction-inducing member also tends to create suction at the lower end of said suc- 1 tion-inducing member 15, and thus assist the centrifugal or suction-inducing blades 35 of the latter in drawing the air and gases through the vent openings 14 of the supporting tube or stack 59, and each centrifugal suction-inducing blade is provided with a securing flange 60. Each of the propeller blades 59 is provided with securing flanges 61, 62, disposed at an angle to each other, one of the flanges of each exterior propeller blade being in line with the flange of an tion and trend in different directions.

interior centrifugal or suction-inducing blade, and fastening means 63, such as rivets, bolts, or the like, are passed through one of the flanges of each of the exterior propeller blades and through the securing flange of an interior centrifugal or suction-inducing blade, also through the dome proper. There are consequently fastening means provided which are common to both the propeller blades and the centrifugal or suction-inducing blades of the dome. Separate fastening means 64 are passed through the other flanges of the propeller blades.

It will be apparent from the foregoing, that I employ two sets of centrifugal or suction-inducing blades and that the propeller blades formed on the two members carrying such two sets of centrifugal or suction-inducing blades may be differently shaped; also that the supporting surface having such propeller blades or elements applied thereto are of different forma- It has been found that at times air currents failing to act on propeller elements mounted in a particular manner or arranged at a particular angle failed to operate under light air currents coming in contact with the ventilator under certain conditions, while propeller elements otherwise disposed would be brought into operation under such conditions; and therefore, under my double action device, I am assured of the withdrawal of the air and gases from the interior of a building under all conditions of air currents, whether at low or high speed, since one or the other of the sets of propeller blades will be brought into motion and cause its corresponding set of centrifugal or suction-inducing blades to create a partial vacuum within the supporting tube 12, which results in an outrush of the air or gases from the interior of the building. It is also to be noted that both sets of centrifugal or suctioninducing blades will always be brought into action under higher wind speeds, assuring high efficiency and greater displacement of the interior air than would otherwise be possible.

It is obvious that my invention may be employed in various Ways and changes made without departing from the spirit of or sacrificing any of the advantages thereof; also that portions of the structure illustrated and described may be employed without utilizing other portions, all in accordance with the appended claims.

Having thus described my invention, what I claim is:

1. A ventilator, comprising a supporting tube of predetermined length, an imperforate tube having the major portion of its length surrounding the upper end of said supporting tube and separated therefrom by a space, means of communication between the interior of said supporting tube and said intervening space, said means being provided in the Wall of said supporting tube, propeller elements on the exterior of said surrounding tube, and means on the interior of said surrounding tube for creating suction to cause air to be drawn through said means of communication.

2. A ventilator, comprising a supporting tube adapted to be fastened to a stack or conduit and having a circular series of vent openings in its wall, a rod non-rotatably and axially disposed within said supporting tube and extending upwardly therefrom, a dome rotatably mounted on said rod, a supporting bracket rotatable on said rod and held against movement lengthwise along the same, a second tube surrounding said supporting tube in the plane of the circular series of vent openings therein and fastened to said bracket in spaced relation to said supporting tube, propeller blades on the exterior of said second tube and centrifugal blades on the interior thereof, said centrifugal blades acting to draw air upwardly in said supporting tube and outwardly through the vent openings in the wall thereof and serving also to deflect the air so withdrawn downwardly and outwardly through the lower open end of said second tube.

3. A ventilator, comprising a supporting tube having a circular series of vent openings in its wall, a rod axially and non-rotatably disposed within said supporting tube and extending upwardly from the upper end thereof, a dome mounted on said rod, a supporting bracket rotatable on said rod and having spaced-apart antifriction bearings and a U-shaped portion extending into the open upper end of said supporting tube, said bracket also having arms extending radially from said U-shaped portion above the upper edge of said supporting tube, a second tube secured to the outer ends of said arms in spaced relation to said supporting tube and in the plane of the vent openings therein, propeller elements on said second tube, and suction-inducing means on said second tube to cause air to travel in said supporting tube and outwardly through the ven openings therein.

4. A ventilator, comprising a supporting tube having a circular series of vent openings near its upper end, a rod axially and non-rotatably arranged within said supporting tube, a tube-supporting element comprising a U-shaped member having arms extending radially from the upper ends thereof and having a bearing sleeve pro-- vided with spaced-apart anti-friction bearings at opposite ends through which said rod axially extends, said bearing sleeve having supporting arms extending from its upper end, a second tube secured to the radially-extending arms of said U-shaped member and to said supporting arms in spaced relation to said supporting tube and in the plane of said circular series of vent openings, propeller blades on the exterior of said second tube, and centrifugal blades on the interior of said second tube.

5. A ventilator, comprising a supporting tube having a circular series of vent openings near its upper end, a rod axially disposed within said supporting tube and held against rotation, said rod extending upwardly above said supporting tube, a dome supported by said rod, a tube support having a U-shaped portion extending downwardly into said supporting tube and having radial arms at the upper ends of its side members terminating in depending portions, a tube secured to said depending portions in spaced relation to said supporting tube, a bearing sleeve extending upwardly from the cross member of said U-shaped portion and through which said rod axially extends, and supporting arms connecting the uper end of said bearing sleeve with said second tube, propeller blades on the exterior and 14 the latter, a conical dome tapering upwardly and provided with a short tubular portion at its apex, a hearing within said short tubular portion, a diametral brace through which said rod extends having its outer ends secured to the Wall of said dome near its lower portion, a bearing for said rod carried by said brace, propeller elements on the exterior of said dome, and centrifugal elements on the interior of said dome serving to draw the air upwardly from said supporting tube and to force the air so drawn out of the tube downwardly and outwardly around the supporting tube '7. In a ventilator, a supporting tube, a rod non-rotatably arranged within said supporting tube and extending upwardly above the upper end of the latter, a conical dome tapering upwardly and provided with a short tubular portion at its apex, a bearing within said short tubular portion in which said rod is axially arranged, a nipple surrounding said short tubular portion and secured thereto, said nipple extending upwardly above said short tubular portion and above the bearing therein, a cap removably secured to the upper end of said nipple, exterior propeller elements on said dome, interior centrifugal elements in said dome, and means to maintain the lower portion of said dome concentric with said rod.

GEORGE STEEB.

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