US2039484A - Ventilator - Google Patents

Description

ay5, 1936. T. A. HEPPENSTALL 233395184 VENT'ILATOR Filed Dec. 8, 1952 2 Sheets-Sheet 1 y 9 1936. 'i. A. HEPPENSTALL. 2,@339?94$4 VENTILATOR Filed Dec. 8, 1932 2 Sheets-Sheet 2 Patented May 5, 1936 UNITED STATES PATENT OFFICE VENTILATOR Application December 8, 1932, Serial No. 646,272 In Great Britain January 12, 1932 3 Claims.

This invention relates to ventilators of that type in which are employed an eduction pipe, a cap member, and a storm band, such for instance as is shown in United States Letters Patent No.

5 1,589,581 dated June 22, 1926.

The present invention has for its object to provide ventilators of the type referred to with an angular storm band without diminishing the efficiency of the ventilator.

The angular storm band is preferably made square in form and the eduction pipe and cap member are preferably made circular, and when these parts are assembled, the ventilator is provided with a gas outlet having portions of different widths, being wider at the corners than at the sides of the ventilator. The wider portions of the gas outlet located at the corners of the angular storm band, afford opportunity for rain driven downward into the ventilator at different angles, to enter the eduction pipe .and descend into the structure upon which the ventilator is mounted.

In accordance with the present invention, the ventilator is provided at the wider portions of the gas outlet with means for preventing the rain which may enter the top of the ventilator at the corners thereof, from passing into the eduction pipe, without materially interfering with the flow of gases from the eduction pipe out of the ventilator through the gas outlet passage thereof, and therefore without diminishing the efficiency of the ventilator.

These and other features of this invention will be pointed out in the claims at the end of this specification.

Fig. 1 is .a plan view of one form of ventilator embodying this invention;

Fig. 2, a vertical section on the line 22, Fig. 1, and

Fig. 3, an enlarged detail of one corner of the ventilator shown in Fig. 1.

Referring to the drawings and particularly Fig. 2, I represents the eduction pipe; I2, the cap 45 member; and I3, the storm band of a ventilator embodying the invention.

The eduction pipe I0 is preferably circular in form and. is provided with a lip I4, and the cap member I2 is shown as a circular disk of sub- 50 stantially the same diameter as the eduction pipe I0 and provided with a lip I5 of substantially the same diameter as the lip I4 on the eduction pipe.

The cap member I2 and the upper end of the eduction pipe ID are located in an angular storm band I3, preferably square as shown in Fig. 1, and

the space between the cap member I2 and the storm band I3 constitutes the gas outlet for the ventilator.

The gas outlet between the cap member I2 and the center portion of the sides of the storm band 5 is materially narrower than the portion of said gas outlet between the corners of the storm band and the cap member, as clearly shown in Fig. 1, the said gas outlet increasing in Width from the center of the sides of the storm band toward the corners thereof.

Owing to the greater width of the gas outlet passage at the corners of the storm band, greater opportunity is afforded for rain driven down into the ventilator at different angles, to pass into the 15 eduction pipe and thence into the structure upon which the ventilator is mounted, which is highly objectionable.

To prevent rain which may enter the ventilator at the corners thereof from passing into the 0 eduction pipe, baflling means are located between the cap member I2 and the storm band l3 at the corners of the latter, and it is preferred to make the baflling means in the form of continuous circular bands or members I6, H, which are of different diameters and are provided with peripheries of different Widths.

The band or member I6 of larger diameter is preferably made of a diameter substantially equal to the width of the storm band, so that the said band or member is substantially tangent to the inner surfaces of the sides of the storm band as represented in Fig. 1.

The band or member I! is of smaller diameter than the band or member I6 and is located between the lip I5 on the cap member I2 and the storm band I3, and the band or member I! extends above and below the lower edge of said lip.

The bands or members I6, I! are supported by vertically arranged corner plates or vanes I8, which are suitably fastened to the storm band at the corners thereof and extend diagonally toward the axial center of the eduction pipe I0 and cap member I2.

The vanes or plates I8 may and preferably will be constructed so as to form supporting members for the eduction pipe I 0, cap member I2, and a baflle ring or band I9, which it is preferred to employ and which is located between the cap member I2 and the eduction pipe Ill.

The vertically arranged corner vanes or plates I8 are provided on their inner edges with inclined slots 20, 2I for the reception of the lip I4 on the eduction pipe I0 and the baffle ring or band l9, as represented in Fig. 3, and the top edge portion of the vanes or plates I8 are provided with inclined projections or extensions 22 upon which rests the lip IS on the cap member.

By reference to Fig. 3, it will be seen that the band or member I! co-operates with the cap member I2 and the bafiEle ring l9 to efiectively prevent rain driven into the top of the ventilator at the corners thereof and at an angle approximating the horizontal, from passing over the top end of the bafile ring 19 and descending into the eduction pipe l0 and thence into the structure on which the ventilator is mounted.

It will also be seen that the band or member I B co-operates with the baflie ring I9 and the lip H on the eduction pipe I 0 to prevent rain driven into the ventilator at a different angle from entering the eduction pipe below the baflie ring l9.

It will further be observed that the wider portions of the gas outlet passage of a ventilator having an angular storm band is effectively protected against rain, driven into the wider portion oi the gas outlet passage, from entering the eduction pipe and the structure on which the ventilator is mounted, which would not only be objectionable to users of the structure but also would materially diminish the efficiency of the ventilator.

A ventilator having an angular and preferably square storm band is capable of general use on stationary structures, such as buildings and the like, but is particularly adapted for use on movable structures, such as motor buses, railway cars, and other movable vehicles, and when used on movable structures, it is preferred to employ a cap member of the character herein shown, which does not project above the square storm band and allows the ventilator to be made compact without decreasing its efliciency, and to present a pleasing and inconspicuous appearance, especially on motor buses, railway cars, and like vehicles.

Having thus described the invention, what is claimed is:

1. In a ventilator, in combination, an eduction pipe, a cap member located above and in line with said eduction pipe, a baffling ring between said eduction pipe and cap member, a storm band of greater area than said eduction pipe and cap member and of a height greater than the distance between the eduction pipe and cap member angular in cross section with the walls of its angles continuous and vertically arranged and forming vertically arranged corners in said storm band, said angular storm band forming with said cap member a gas outlet passage about the cap member having portions of greater width between the vertically arranged corners of the storm band and said cap member than between sides of said storm band and said cap member, and circular bands of diiierent diameters in the portions of the gas outlet of greater width and arranged with relation to said bafliing ring to prevent rain from passing above and below said bafiling ring into said eduction pipe.

2. In a ventilator, in combination, a circular eduction pipe, a circular cap member above and in line with said eduction pipe, a rectangular storm band surrounding the eduction pipe and cap member and of a height greater than the distance between the eduction pipe and cap member, said rectangular storm band forming with the cap member a gas outlet surrounding the cap member and of greater width at the corners of said rectangular storm band, and a circular band interposed between the cap member and the storm band at the corners thereof.

3. In a ventilator, in combination, an eduction pipe, a circular cap member above and in line with said eduction pipe and separated therefrom by a substantial space, an angular storm band surrounding the eduction pipe and cap member and having the walls of its angles vertically arranged and extended above the circular lower edge of the cap member and below the upper edge of the eduction pipe and forming with the circular lower edge of the cap member a gas outlet passage having the portion thereof between the vertical walls of its angles of greater width than that of the portions between the cap member and the non-angular vertical portions of the storm band, and bafiling means in said wider portion of said gas outlet passage to prevent rain passing over the upper edge of the angular portion of the storm band from passing into the eduction pipe.

THOMAS A. HEPPENSTALL.

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