US2240991A - Air supply device - Google Patents

Description

May 6, 1941. F, J, KURTH 2,240,991

AIR SUPPLY DEVICE" Filed Nov. 23, 1937 Sheets-Sheet 1 INVENTOR fTGA IVZ J K1497 ATTORNEY y 6, 1941- F. J. KURTH 2,240,991

I AIR SUPPLY DEVICE Filed Nov. 23, 1937 2 Sheets-Sheet 2 INVENTOR fieovz J. fiery ATTO RNEY Patented May 6, 1941 UNITED STATE AIR SUPPLY DEVICE Franz J. Kurth, New York, N. Y., assignor t Anemostat Corporation of America, a corporation of Delaware Application November 23, 1937, Serial No. 176,070

- 8 Claims. This invention relates to the art of ventilation, and has particular reference to improve-' ments inair supply and distributing devices of thetype comprising a plurality of successively larger, hollow flaring members disposed relatively to eachother to provide a plurality of flaring passageways therebetween, whereby air flowing through the device into a room or other enclosure is effectively difiused.'

' Generally speaking, the object of the present.

invention is to provide an air distributing device of the character stated embodying a construction whereby differences in the flow ,of air through different transverse portions or zones of the individual passageways, and through different transverse portions or zones of the device as a whole, are obtained, to the end of providing for most suitable diffusion of the air in particular instances, as, for example, where it may be desired to have a greater or a lesser amount of air flow from the device in one or more directions than in one or more other directions.

More particularly, the object of the invention.

which the supplied air is delivered, directly below and directly forwardly of the device, a progressively decreasing recirculation flow and mixing of air laterally and upwardly from the medial portion toward the side portions of the device, primarily a forward and lateral or fanlike outward flow of air from the top portion of the device horizontally, and a gradual blending of the respective flows of air with each other, thus practically to eliminate the possibility of a person standingbneath, o1 directly forwardly, or in any position relative to the device, experiencing a sensation of draft.

With the foregoing and other objects in view, which will become more fully apparent as the nature of the invention is better understood, the same consists in an air distributing device of the character stated embodying the novel panying drawings and defined in the appended claims.

of air flowing forwardly and rearwardly through different portions or zones of the individual pas-.

sageways, transversely thereof as viewed from the front of the device, and through different portions or zones of the device as a whole, transversely thereof as viewed from the front of the connection an important object of the invention is to provide an air distributing device of the character stated, especially for use with a side wall outlet of an air supply conduit disposedat an elevation above the average person's head, embodying a construction whereby little or no air flows directly downwardly and forwardly from the device, but, on the contrary,

there is mainly a recirculation flow of air, and a mixing of'the supplied air with the air into an air distributing device especially designed for use with a side wall outlet of an air supply conduit and embodying the features of the present invention.

'Figure 2 is a horizontal section through the device shown in Fig. l the section being taken directly .below the top cover plate of the device. Figure 3 is a. perspective view of the device shown in Figs. 1 and 2 as viewed from the front and to one side thereof.

Figure 4 is a. front elevation of the device; and

Figure 5 is a. perspective view of the device as viewed from the front and below the same, the angle of view being substantially as indicated by the arrow designated as V in Fig. 1 of the drawings.

Referring to the drawings in detail, it will be observed that the device is. of a known general type comprising a plurality of successively larger, open-ended hollow flaring members all having their smaller ends facing the rear or air inlet end of the device and all disposed in axial alinement, or substantially in axial alinement with each other and in spaced apart relationship to provide therebetween a plurality of flarins passageways for flow of air through the device.

The device, as viewed from its front, may be of circular, elliptical, semi-circular or other 8 for flow of air into the device.

suitable shape, depending upon whether it is to be used with a ceiling or a side wall outlet of an air supply conduit and depending, also, upon particular conditions encountered and the particular air diffusion desired in any particular installation. In the present instance the device is illustrated as being ofvflat-top semi-circular shape as viewed from the front and as embody-' ing a construction especially adapting it for use with aside wall outlet of an air supply conduit disposed at an elevation above the average persons' head.

While the device may be comprised by difl'erent numbers of flaring members, a practical number of such members is live, and this is the number of said members illustrated in the present instance. 4 These members, beginning with the innermost or smaller member and reading outwardly, are designated as l, 2, 3, 4 and 5, re-- spectively, and, as shown, they are hollow, open so at their ends, axially alinecl, disposed with their rear or smaller ends facing the rear or air inlet end of the device, of progressively increasing flare, respectively, reading outwardly, and disto the opening 8 and these overlapping portions progressively decrease in area toward the bottom of the smaller end of said member which, as aforesaid, is alined, or substantially alined, with the bottom of the opening 9. Accordingly, air is free to'flow from the outlet 9 across the lower portion of the smaller end of the passageway and is not deflected into the bottom portion of said passageway; whereas, toward the top of said passageway j at each side of the device the portions H of the smaller end of said member 5 intercept and direct air laterally outwardly through said passageway j in progressively increasing amounts upwardly.

The smaller end of the member 4 bears the same general relationship to the smaller end of the member 5 as the smaller end of the latter member bears to the opening 8, with the difference, however, that the lowermost portion of the smaller end of the member 4 is disposed slightly above the lowermost portion of the smaller end of themembe'r 5, as clearly illustrated in Figs. 1

\ and 4. As a result, a small amount of the supposed in spaced apart relationship whereby there are provided between them flaring passageways open at their rear and outer endsand designated as .b, c, d and e, respectively. Behind the larger or outermost flaring member plied air is intercepted by the lowermost portion of the smaller end of the member 4 and is deflected into the lowermost portion of the passageway e, this air flowing only through the forward part of the lowermost-portion of said passage- 5 and spaced rearwardly therefrom is a flat or a so substantially flat'plate 6 which is vertically or substantially vertically disposed and which cooperates with said larger or outermost flaring -member 5 to provide an outermost flaring passageway-f. On the other hand, at the top of the st device is a cover plate I which is horizontally or substantially horizontally disposed and closes the tops of the flaring passageways b, c, d, e and f and cooperates with the smaller or innermost the device there is also both a forward and a rearflaring member I to provide an innermost flar 40 ing passageway a. In the plate 6 is an opening Preferably, the forwarduends of the flaring members I, 2, 9, 4 and 5 are successively stepped rearwardly, relative to each other. As a consequence, the device as an entirety and the plate I are of substantially semi-circular shape as viewed in plan.

The device; may have a neck of semi-circular or any other suitable cross-sectional shape extending rearwardly from the plate 6 for connecting-the device witha side wall outlet 9 of an air supply conduit IO, or the device may be operatively mounted with respect to a side wall Referring now particularly to the rear or smaller ends of the flaring members'l, I, I, 4 and 5, it will be observed that the same have a whereby the purposes of the invention are atto Figs. 1 and that the lowermost portion of the smaller end of the member I is disposed in subward flow of air through said passageway and, consequently, a mixing within and beyond said passageway of the air flowing forwardly therethrough and therefrom with the air flowing rearwardly thereto and therethrough, but; as is apparent, the forward flow of air progressively increases and the rearward flow of air progressively decreases from the bottom of said passageway upwardly at each side thereof due to the progressively increasing overlappin relationship upwardly to either side of the device of the smaller end portion of the member 4 with respect to the smaller end portion of the member 5.

The smaller end of the member 3 bears the same general 'relationship to the smaller end of I outletsuch as that designated as 9 in any other 5 5 suitable manner.

the member 4 as the smaller end of-the latter member-bears to .the smaller end of the member 5. However, the lowermost portion of the smaller end of the member 3 is disposed higher above the lowermost portion of the smaller end of the peculiar and novel relationship to each. other no 7 tained. First, it will be observed byreference .1

stantially the same horizontal planeas thelowermost portion of the opening I in the plate] and that, from its lowermost portion the saidsmaller end ofsaid member l,'as' it extends up-- words, theupper portions-"of the smaller end of '1 the'member I. as viewed from the front of'the' vice, are disposedin'overlwm relationship is member ,4 than-the lowermost portion of the smaller end of the member 4 is disposed above the lowermost portion of the smaller end of the member 5. Consequently, while there is both v 5, the proportions of the air flowing forwardly fla'nd rearwardly through the lowermost portion of said passageway d are, respectively,

and lesser as compared with the proportions'of the air flowing forwardly and rearwardiy I the lowermost portion of the passage- .rway-e. Upwardly 3 h m d passageway! toward'either side of the device there-is also both a forward and a flow of air through said passageway and, consequently, a mixing within and beyond said passageway of the air flowing forwardly therethrough and therebeyond with the air flowing rearwardly thereto and therethrough, but, as is apparent, the forward flow of air progressively increases and the rearward flow of air progressively decreases from the bottom of said passageway upwardly toward each side of the device due to the progressively increasing overlapping relationship upwardly of the smaller end of the member 3 with respect to the smaller end of the member 4.

The smaller end of the member 2 bears the same general relationship to the smaller end of the member 3 as the smaller end of the latter member bears to the smaller end of the member 4, and the resultant'flow of through the passageway c is generally the sameas in the passageway d, the only essential difference being that the lower portion of the smaller end of the member 2 is disposed somewhat higher above the lower portion of the smaller end of the member 3 than the lower portion of the smaller end of the latter member is disposed above the lower portion of the smaller end of the member 4, with the result that, as compared with the flow of air in the lower portion of the passageway d, the forward flow of air through the lower portion of the passageway C is somewhat greater and the rearward flow of air through said passageway is somewhat less. Upwardly from the bottom of the passageway toward either side of ,thedevice there is both a rearward and a forward flow of air through said passageways and, consequently, a mixing within and beyond said passageway of the air flowing forwardly therethrough and therefrom with the air flowing rearwardly thereto and therethrough, due to the progressively increasing overlapping relationship upwardly to eitherside of the device of the smaller end of the member 2 with respect to the smaller end of the member 3 but, as compared with the forward and rearward flows of air through the sides of .the passageways d, the corresponding .air flows in the corresponding portions of the passageway c are greater and lesser, respectively, due to the generally more wide open nature of the smaller end of the passageway c. The smaller end of the member I bears generally the samerelationship to the smaller end of the member 2 as the smaller end of the latter member bears to the smaller end of the member 3, and the resultant flows of air through the passageway b are therefore generally the same as through the passageway 0, except that, proportionately, more air flows forwardly and a lesser amount of air. flows rearwardly through said passageway 1) than through the passagewayc. Through the passageway a there is primarily a flow of air forwardly and laterally and slightly downwardly from the device, due to the top plate I and to the lack of anything to interfere with directflow ofair from the outlet S'through said passageway a. However, due to the flare of the member I, a slight rearward or aspirating flow of air occurs in the passageway a, as indicated by the arrowsin Figs. 1 and 5 of thedrawings.

thetop of the device. Also, it will be apparent that, at each side and toward the top of the device, the air flow is primarily forwardly; that, at each side and toward the aforesaid medial zone of the device, the air flow is primarily rearwardly but not as pronounced as in the said medial zone of the device; that, at each side of the device, the forward flow of air progressively increases and the rearward flow of air progressively decreases toward the top of the device, and that there is a gradual blending of the various flows with each other as set forth. Accordingly, assuming that the device is associated with a side wall outlet of an air supply conduit located above the average persons head, it is apparent that the device practically eliminates the possibility of a person standing beneath, or directly forwardly, or to either side of the device, or in fact in any position relative thereto, experiencing any sensation of draft. At the same time, the device provides for the supply of air to accomplish effective ventilation.

The respective member's comprising the device may, of course, be secured in assembly'with each other in any suitable manner. As illustrated in the present instance they are in part secured in assembly by the top plate i and inpart by a rod l2,

While only a single specific embodiment of the invention has been illustrated and described, it is apparent that the features-comprising the invention may readily be embodied in other air diffusing devices of various other specifically difat the rear or air inlet end of the device to pro-,

vide therebetween a series of flaring passageways -of substantially U-shape in end elevation, and

means closing said passageways at the flat side of the device, said members having the medial portions of their rear edges disposed inwardly of v "the medial portions of the rear edges of the next is primarily forwardly at the top of the device,

primarilyrearwardly at'the bottom of the device and gradually 'lesserrearwardly and gradually greater forwardly from the bottom toward larger members, respectively, and at least one of said members having the side portions of its rear edge disposed farther inwardly from the side portions of the rear edge of thenext larger member than its medial portion is disposed inwardly of the medial rear edge portion of the said next larger member, whereby a lesser amount of supplied air flows through the medial portion than through the side portions of the passageway between said members.

'2. An air outlet device of substantially U-shapein end elevation having a flat side and comprising a series of successively smaller, open-ended, hollow, flaring members of substantially U-shape in end elevation and spaced successively inwardly of one another withtheir smaller ends disposed at the rear or air inlet end of the device'to provide therebetween a series of flaring passageways of substantially U-shape in end elevation, and means closing said passageways at theflat side of the device, each'of said members having the medial portion of its rear edge disposed inwardly of the medial portion of the rear edge of the next larger member to deflect supplied air through the medial portions of the passageways between said members, at least one said members further having the side portions of its rear edge disposed greater distances inwardly irom the side portions oi the next larger memberthan .its medial rear edge portion is disposed inwardly of the medial rear edge portion oi the said next larger member so that more supplied air flows through the side portions than through the medial portion of the passageway between said members, the medial portion of the rearedge of at least one of said members being disposed a greater distance inwardly of the medial portion of the larger member;-

3. An air outlet device as set forth in claim 2 in' which the said inward disposition oi the side portions of the rear edge of the said at least one of said members progressively decreases toward the medial portion or said'member.

4. An air outlet device as set forth in claim? in which the saidinward disposition oi the medial portion of the rear edge of the said at least one of said members'progressively increases toward the side portions of the rear edge of said .-member.

- 5. An air outlet device as set forth in em 2 in which the medial portions of the-rear edges of the successively smaller members are disposed progressively greater distances inwardly oithe medial portionsoi the rear edges of the next larger members, respectively.

6. An air outlet device as set forth in claim 2 in which the side portions of the rear edges of the successively smaller members are. disposed progressively greater distances inwardly or the membersirespeetively. r

. 7. An airoutlet device of substantially U-shape in end elevation having aflat side and comprishollow, flaring m ie oi substantially U-shape in end elevation an spaced successively inwardiy of one another with their smaller ends disposed at the rear or air inlet end oi'the device to ing a series of vely smaller, open-ended,

next larger member than the medi'alportion oi the rear edge or a larger of said members is .disposed inwardly oi the rear edge 01' the next provide therebetween a series oi. flaring passageways of substantially ,U-shape in end elevation, and means closing said passageways at the flat -side oi the device, a rearmost member spaced rearwardly from the largest flaring memberto provide therebetween 'a rearmost flaring passageway, said rearmost member having an opening for the admission of supplied air to the device, the medial portion oi the rear edge. of the largest flaring member-,beingdisposed at least as far outwardly as the corresponding portion of the opening in said rearmost member, whereby supplied air is permitted to flow across'the mouth of the medial portion of the rearmost passageway and to produce aspiration in the said medial portion of saidrearmost passageway, the side portions of said largest flaring member being disposed inwardly oi the side portions of said opening whereby supplied air is deflected through the side portions of said rearmost passageway.

8. An air diiiusing device of substantially semicircular'shape in front elevation having a sub-' stantially flat side and comprising a seriesoi' successively smaller, hollow, flaring-members of substantially semi-circular shape in front elevation spaced successively inwardly of one another to provide a plurality of flaring passageways 1 therebetween, a plate cooperating with said memmembers to either side of the central, vertical j 4" side portions oi the rear edges oi the next lai er bers to close said passageways at the flat side of the device, the smaller ends oi said members being disposed rearwardly relative to the device and the rear edge portions 01' at least one of said edge portions directly therebehind of the next adjacent outwardly disposed member progreuive- 1y decreasing toward the central, vertical plane of the device.

' FRANZ J. KUR'I'H.

y disposed member, into f I

Images