US1716223A - Ventilator - Google Patents

Description

June 4, 1929. E, w, FRENDAHL 1,716,223

VENTILATOR Filed sept. 19, 1927 l l 7j f4 y@ 'j l y 2 Z5 I a y 2 r1 n 20 1%; I ff/fl- ".7""`

v if l ,e5 ff f/Md We/zcl ATTORNEY CII Patented June 4, 1929.

f maris EDWARD W. FRFNDAHL, OF CHICAGO, LLINOIS.

VENTILATOR.

Application filed September 19, 1927. Serial No. 220,609. f

This invention relates to certain novel improvements in ventilators and has for its principal object the provision of an improved construction of this character which will be highly efficient in use and economical in manufacture.

Among the several objects of the invention resides in the novel manner of associating the parts of the ventilator together.

Further objects of the invention are to provide a ventilator which will prevent the usual downdraft and create what might be termed a siphoning effect of air whereby to properly ventilate a room or building with which it is associated.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of parts to be hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings, showing the preferred form of construction and in which:

Fig. 1 is a part sectional side elevational view of the invention; and

Fig. 2 is a. sectional detail view taken substantially on line 2-2 of Fig. 1.

l My improved ventilator includes a duct 10. This duct 10 is conical in shape and has its lower end portion 11 formed substantially cylindrical and its upper end portion substantially square as at 12 whereby the upper end portion provides an expansion chamber for air moving upwardly through the duct. The upper end portion of the duct projects into a frustum 13 and is secured thereto by means of rivets 14 or the like. The upper end portion of the frustum projects into a ring 15 spaced from the side wall portions of the frustum by means of brackets 16. rllhese brackets 16 have their upper end portions secured to the top edge of the frustum by means of rivets 18 or the like. The brackets 16 include horizontal portions 19 secured to the pilng through the medium of rivets 2O or'the A cap of a frustro-conical shape is indicated at 21 and the lower portion of the cap projects into the ring 15. rilhe brackets 16 provide upwardly inclined end portions 22 and to these end portions is secured the peripheral edge 23 of the cap as at 24, said peripheral edges being spaced from the ring so as to provide a substantial passage.

I have found by forming the duct 10 cylindrical at its lower end portion and square;

at its upper end portion that the usual back draft is eliminated and as the air passes upwardly through this duct a siphoning effect is created, thus properly functioning as a ventilator.

The several parts of the ventilator may have their peripheral edges corrugated as at 25 whereby to re-enforce the several parts of the ventilator,

From the above description taken in connection with the accompanying drawing it will be seen that I provide a ventilator which is not only eii'ective in use but which com prises parts connected together in a simple and expeditious manner.

llVhile l have illustrated and described the preferred form of construction for carrying iny invention into effect, this is capable of variation and modification, without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but

desire to avail myself of such variations and modifications as comev within the scope of the appended claims. 1 y y Having thus described my invention what I claim as new and ters Patent is: f

1. A. ventilator including a duct having a lower end portion substantially cylindrical and an upper end portion formed substantially square, a frustum into which the square end portion of the duct projects, means for connecting the corners of said duct to the frustum whereby openings are provided between the upper end of the duct and the frustum, a ring into which the upper end portion of the fr ustuni projects, a cap having its lower edge portion projecting into the ring above the frustum, the cap to the ring and to the frustum. 'j

2. A ventilator including a duct having a lower end portion substantially cylindrical and an upper end portion formed substantially square, a frustuin into which the square end portion of the duct projects, means ior connecting the corners of the duct to the frustum whereby openings are provided between the upper end ring into which the upper end portion of the frustum projects, a cap havingits lower edge portion projecting into the ring above the frustum, and brackets for connecting the cap to the ring and the ring to the frustuni.

3. A ventilator including a substantially conically Shaped duct having the smaller low-l desire to protect by Letand means for connecting of the duct and the frustum, a f

er end thereof forniedsubstantial-ly circular and having the larger upper end thereof formed substantially square, e frustum, means for connecting the Corner portions of seid duct to said frustum whereby the smallerlower end of said duct will project be,- yond the lower end of said rustum and whereby segmental openings will be defined by the portions of said duct extending bel@ tween said securedV corner portions and copoint in the extent thereof, and bracket inembers for securing the upper portion of said frustuin in said ring below said cap and in spaced rela-tion thereto.

In testimony whereof I affix my signature.'

EDWARD WV. FRENDAHL.

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