US2627799A - Air outlet device for heating, cooling, ventilating, or other purposes - Google Patents

Description

Feb. l0, 1953 F, J, KURTH Er AL 2,627,799

AIR OUTLET DEVICE FOR HEATING, COOLING. VENTILATING OR OTHER PURPOSES Filed March 31, 1948 4 Sheets-Sheet 1 Fb. 1o, 1953 F. J. KURTH Er AL 2,627,799 AIR OUTLET DEVICE FOR HEATING, COOLING. VENTILATING l OR OTHER PURPOSES Filed March 51, 1948 4 Sheets-Sheef 2 Feb. 10, 1953 F. J. KURTH E-r AL 2,627,799

AIR OUTLET DEVICE FOR HEATING, COOLING, VENTILATING OR OTHER PURPOSES 4 Sheets-Sheet 3 Filed March 31, 1948 .n Wmv Feb. 10, 1953 F, 1 KURTH Er AL 2,627,799

AIR OUTLET DEVICE FOR HEATING, COOLING. VENTILATING Y OR OTHER PURPOSES Filed March 3l, 1948 4 Sheets-Sheet 4 ..III.||

laterally outward .from the device.

Patented Feb. l0, 1953 UNITED STATES PATENT OFFICE AIRA OL'VILE'IY DEVICE FOR-HEATING, COOL-f' ING, VENTILATING, OR `OTHER PURPOSES corporationof Delaware ApplicationMarch 31, 1948, .Seriall No. 1i8,'1'1'6"' T-laines'. 1v

This invention relates to air outlet devices for `controlling the delivery ofair from air supply ducts into rooms `or other enclosures for heating, cooling, Ventilating` or other purposes, and has particular reference to improvements' in air out'- let devices. of the type comprising an outermost, open-ended member, a second member spaced from said outermost member'to provide between said .members an airV passageway through which some-or all of. the air may flow, and, if desired, one or more other members spaced'irom said sec; ondmember, andfrom eachother, as the case may be, to provide one or more additional'p'a's` sageways .through which part ofthe air may flow.

In such. air outlet devices. the second member may be formedor arranged relative to the'outermostmemberso .that it causes air flowing through the passageway between the same and said outer'- most member to be deected laterally outward. Also, the front or outer end portion of the outermost'v member may be formed to intercept air flowing through the passageway between'. said outermost and said second members and to deilect such Vair forwardly from the device. Accordingly, if the second member is positioned. to deilect air against the front end portion of the outermost member, the air will be caused by said front end portion to now more or less directly forwardly from the device. If, on the other hand, the. second. member is positioned to deect the airlaterally outward across the front end of the outermost member, the latter will have little or no eect upon the. direction of the air flow and consequently the air will ow substantially only Intermediate positions of the second member will, of course, result in its cooperation with the front end portion of the outermost member to cause the air to be deliveredin intermediate directions from the devlce.

Inthe use of a device of the type mentioned it sometimes may be desirable to have the air delivered'more or less only directly forwardly from the device and, at other times, more or less only laterally outward from the device, while at other times it may be desirable to have the air delivered from the device in some intermediate. direction. Accordingly, one special and important object of the 'present invention is to provide an air outlet device of the type mentioned embodying simple,

practical means for mounting the second member for longitudinal adjustments relative to the outermost member to vary the direction of flow of air. from the device, andfurther embodying simple, practical, readily accessible and easily oper- 2. ated lneans whereby such ladj ustmentsof" the seca ond member may be effected with facility;

In any instanceiwhere a device oft'lletype nientioned comprises, in addition toa second, adjust ablemember, one ormore other membersspaced from `the second member, another special and important' objectr` of 'the' invention is toprovides'in'i ple, practicall means for 'mounting the said other rlrie'mber,V or members; securely in desiredrelationship to each other and to the 'outermost members. Additionally in this connection; another sfpeeial and important object'A of theii'n'veiition ist'ov provide simple', practicalmeans whereby'the-second member and'any additional members'imay beisecured as a unit'qliickly,` easily and'securely'tothe outermostl member and may equally as quickly andeasily berem'ovedas a unit'from'saidouter'- mos-t member'to affordready acces's't'otheeleiments of said kunit and tothe outermost; member forcleaning, repair' or' other purposes aswellas to facilitate installation of the device.

In some instances it" may be desirable-y touse in association vwith an air outlet"devicepfthe-type mentioned, a damper of any suitab'lety'pe'to regulate low `of air from allA air supply duct tothe air outlet device, and inthis connection another special and Yimportantobject ofi-the invention is'to so construct the airoutletdevice that' it" may serve as a positioning and guiding' meansfo'r means to adjust the damper.

with the feregeingend otlierobjeetsiii view, which will become morefully' apparent as'th'e nature of the invention is better understood; the same consists in an air outletdevicean'cl; if vdesired, an associated damper, as illustrated byway of example in thev accompanying drawings and embodying the novel features of construction, combinati-on land' 'arrangement ofpa'rts as'will be hereinafter-more fully described and'iclaimed".

In the accompanying drawings, wherein'lilie characters l of reference denote corresponding parts in related `views:

Fig. l is a central, longitudinal seetiontiimugh an airoutlet'device' and an associated damper constructed in accordance `withtlie"inv'enti'on.`

Fig'. 2 is a transverseseetien enmthezlinez-'z of Fie. 1.

Fig. 3 isv a" central, lolflgitudilialsectionon'ah enlarged scale through theV central vporti'onof the air outlet device'.

Fig. 4 is a detail 'perspective view showing tle construction and' arrangement ofthe inner end portions of the `spider arms of '.ltheair outletdevice.

Fig.'5*is a'viewsimilax" to Fig. 3"illstrating an alternative construction of the air outlet device; and

Fig. 6 is a view similar to Fig. 1 illustrating another alternative construction of the air outlet device.

Referring to the drawings in detail, first to Figs. 1 to 4, A designates, generally, an air outlet device constructed in accordance with the invention and B designates, generally, a damper operatively associated with said air outlet device.

According to the specific construction illustrated in the drawings the air outlet device A comprises an outermost, open-ended, hollow, flaring member IB and a second smaller flaring member II which is disposed within and spaced from said outermost member I to provide between said members a passageway a which may or may not be of flaring form in cross section but which flares forwardly relative to the longitudinal axis of the device. The device A may comprise only two flaring members, such as the members I0 and II, or it may comprise any desired plurality of successively smaller, openlended, hollow, flaring members spaced apart successively inwardly of one another to provide any desired number of flaring passageways for flow of air therethrough. In this connection and as illustrated in Fig. 1 of the drawings, the device A is illustrated as arbitrarily comprising four flaring members; viz., the outermost member Ill, the second or next smaller member II, a third member I2 disposed within and spaced from the member II to provide between said members II -and I2 a passageway b which flares relative to the longitudinal axis of the device, and a fourth member I3 disposed within and spaced from the member I2 to provide between said members I2 and I3 a third flaring passageway c.

wardly either across said passageway, or across the front end thereof, depending upon the position of said portion I'I longitudinally of the device relative to the front end of the outermost flaring member I0.

The angularity of the front end portion I4 of the outermost flaring member I0 relative to the rear portion of said member is arbitrarily, but is such, generally speaking, that if air flowing through the passageway a is deflected outwardly against the same, it will, in turn, serve to deflect the air more or less inwardly so as to cause it to leave the passageway a in a direction more or less directly forwardly from the device.

From the foregoing it follows that if the second flaring member I I is positioned, as indicated by dotted lines in Fig. l, so that its front end portion I'I causes air flowing through the passageway a to sweep across said passageway against the portion I4 of the outermost flaring member II), as indicated by the arrow d in Fig. 1, the said portion I4 of the member I0 will intercept and deflect the air so as to cause it to flow more or less directly forwardly from the device as indicated by the arrow e in Fig. 1. It

further follows that if, on the other hand, said second flaring member is positioned as shown by full lines in Fig. l, so that its front end portion Il causes the airl to be deflected laterally outward across the front end portion I4 of the outermost member I0 as indicated by the arrow f in Fig. 1, said portion Ill will have little or no effect upon the direction of flow of the air and the same therefore will flow from the passage- Way a more or less only laterally outward from the device. It additionally follows that for positions of the second member II intermediate its aforementioned positions, the air will be caused to ow from the passageway a, in directions intermediate the directions mentioned.

If the device A comprises only two flaring members, such as the members II) and II, the member II may be closed at either or both of its ends and all of the air delivered to the device through its neck I5 from the duct I6 therefore Will flow through the passageway a. If, on the other hand, the second flaring member I I is open at its ends and the device includes an additional flaring member, or members, such as the member I2 or the members I2 and I3, which serve to provide one or more additional flaring passageways such as the passageway b or the passageways b and c, some of the air will, of course, flow through the latter passageway or passageways.

In accordance with the invention, the second flaring member II and any additional smaller flaring members, such as the members I2 and I3, are, together with adjusting means for the member I I, assembled as a unit, and means are provided whereby this unit may readily and easily be mounted in and removed from the outermost flaring member I6, thus to facilitate installation of the device as well as to afford ready access to its parts for cleaning, repair or other purposes.

Ihe unit mentioned is designated generally as C and includes a shaft I8 which is disposed coaXially with respect to the flaring member I I and which has its rear or inner end portion suitably provided with a pair of annular members IS, I9 spaced apart longitudinally therealong. These members I9, i9 may be either integral with the shaft I8, or separate therefrom and Xed thereto in any suitable manner; or, as shown, they may be in the form of collars engaged on said shaft between a pair of snap rings 2li, 20 or other suitable abutments carried by said shaft. Preferably, however, they are in the form of collars confined between a pair of abutments on the shaft, and preferably, too, suitable spring means, such as a spring washer 2l, is interposed between one of the same and one of the abutments 2Q, whereby they are urged toward one another. In any event, the outer end portions of said members are flanged as indicated at 22.

The unit C further includes a plurality of spider arms 23 which are formed from sheet metal or other suitable sheet material and which are of narrow, inverted U-shape in cross section. Appropriately there may be three of these spider arms. In any event, they are duplicates of one another and extend radially from the rear end portion of the shaft I8, being preferably equi-dist ntly spaced apart angularly about said shaft.

The inner end portions of the side walls of each of the spider arms 23 are formed as curved arms 2t which embrace the annular members I 9, I9 between the flanges 22 of said members. Thus, said spider arms are assembled at their inner ends with the shaft I8 and are maintained tight with respect to said shaft due to the spring washer 2I serving' to urge the annular members I9, I9 toward' one another and to the resulting clamping of said arms between the flanges 22.

Between the side walls of each of the spider arms 2.3r is disposed a lever 25 which is pivoted intermediate its ends to the spider' arm as indicated at 23. At its outer end, each lever 25 is suitably pivoted to a related arm 2'! which is Xed to and rises from the flaring member II, while at its inner end each lever 25 is suitably pivoted to a nut 28 which is threaded on the shaft I8 between the annular members I9, IS.

To pivotally connect the levers 25 with the arms 2l, the outer end portions of said levers may be rounded and may be disposed in slots formed in said arms and opening through the inneredges thereof. Similarly, to pivotally connect said levers 25 with the nut 28, the latter may'have rounded lugs 2S extending therefrom and engaged in slots formed in and opening through the inner ends of said levers. IThe lugs 29 and the rear or free ends of the arms 2l extend between the side walls of their related spider arms 23. Thus, the side walls of said spider arms hold the nut 28 and the flaring member II against rotation and maintain the pivotal connections between the levers 25, the arms 2l and said nut 28. Thus, too, pivot pins are avoided and the pivotal connections between the levers'25, the arms 2l and the nut 23 may readily and easily be effected.

At its from'l end the shaft I 8 is provided with a suitable knob 39 f'or'eifecting its rotation. Since the nut 28 is held against rotation, it is apparent that by rotating the shaft I8 the nut 23 may becaused to travel therealong to swing the levers 25 and thus effect longitudinal or forward and rearward adjustments of the daring member I I.

If the device A should include a third flaring member I2, the spider arms 23 may have depending therefrom arms 3I to which said third ilaring member may be secured, while if saiddevice should include a fourth flaring member I3, the latter may be confined at its rear end between the adjacent ends of a pair of sleeves 32 engaged on the shaft I8 between the front abutment 2E) and the knob 3G, whereby it may be' fixed with respect to thev third aring memberA I2.

The spider arms 23 are of lengths to be accommodated in the neck I5 of the outermost flaring member lil and at their outer ends are suitably'provided with tongues33 to be entered into and withdrawn from suitable keeper pockets 3llcarried by the outermost flaring member IQ by a small amount of rotation ofthe unit C about its longitudinal axis relative to the outermost aring member IB.

The pockets 3 are located adjacent to the rear end of the aring member I5) and, of course, correspond in number and angular spacing to the number and angular spacing of the spider arms 23. Each may be formed by providing a slit in the member I0 and by pressing forwardly a portion of said member adjacent to the slit, or they may be formed by suitably fastening small pieces of U-shape in cross section against the front face of the member Il). In any event, said pockets each have at least one open end so that the tongues 33 may be entered into and withdrawn from the same by a small amount 0f rotation of the unit C.

In the flaring member I0, adjacent to the end ofat least: one.of..the.pockets 3Il1through which the-related tongue 3-3 is insertableinto and ree. movable from said pocket, is an opening 35 through which extends the forwardly directed free end portion SI5 of a leaf spring 3l which is concealed behind said flaring member I0. At its other end said leaf spring isv suitably fastened-to said member IB, while between its ends said leaf spring is provided with a push buttonA 38v which extends forwardly through another opening in the flaring member Iii. The freeend portion 35 of said leaf spring is disposed to en-V gage the edge of the tongue 33- remote from the pocket ed when said tongue is disposed in said pocket, thus to prevent rotation of the assembly C relative to the member le and'to inA sure against accidental displacement of said unit C from its operative position Within the flaring member It. However, simply by pushing upon the push button 38, the leaf spring 3l may be flexed rearwardly to retract its forwardly directed free end portion 3S from its tongue latch;- ing position. The unit C then may be rotated to disengage the tongues 3S from the-pockets 34, whereupon said unit is free to be removed'- from the member i3.

When the unit C is operatively mounted inthe outezncst flaring member Ill, the secondvflaring member I I .is supported for rearward adjustment to positions in which it is effective to'cause air iowing through the passageway a to be deflected outwardly against the portion lil' ofy the member i9, and for forward adjustment to positions'in which it is cective to cause air flowing from said passageway a to be deflected laterally outward across the front end of said member Iii. Such adjustments of the member I I obviously may be eected with facility simply by grasping and ro"- tating the l-:nob 3d which, it will be noted, sdisposed at the front of the device, centrally thereof,` where it is conveniently accessible.

The button 3b also is located where it is readily accessible from the front of thedevice through the passageway a whereby mounting of the unit C within, and its detachment from, the outermost flarinrr member Il) may be accomplished with facility.

By way of example it may be pointed out that when heated air is delivered through the device A for room or enclosure heating purposes, it may be desirable to have the air flow more or'less directly forwardly from th'edevice,` while when cool air is supplied through the vdevice forroom or enclosure cooling or Ventilating purposes, it may be desirable to have the air fiow primarily laterally outward from the device. Regardless of whether any particular device includes only a single air passageway, such as the passageway a, or additional smaller passageways, such as the passageways b and c, the direction in which air leaves the passageway a primarily determines the general direction in which air ows from the device. Manifestly, therefore, the provision for longitudinal adjustments of the second flaring member EI enables the direction of iiow of air from the device to be regulated as desired.

In many instances it may be desirable to use, in association with an air outlet device such as the device A, a damperto regulate flow of air from the duct I3 to the device A. In any such instance, the shaft I8 of the device A may conveniently be employed as a supporting and guiding means for means for adjusting the damper B.

The damper B is illustrated by rway of example as of the swinging vane type and as :comprising a rectangular, housing llgwhichis open at its-.front and rear ends for flow of air therethrough and which may be mounted in any suitable manner in the duct I directly behind the air outlet device A so that air flowing from said duct through said housing enters the neck I5 of the device A.

The damper B further comprises a rectangular frame 4| which, like the housing 40, is open at its front and rear ends for flow of air therethrough and which is hinged at one end to one end of the housing 4B, as indicated at 42, for swinging movements between a position within and parallel to said housing 40, as illustrated by full lines in Fig. 1, and different positions of rearward inclination relative to said housing, one of which is indicated by dotted lines.

Extending across the frame 4| at points spaced longitudinally therealong is a plurality of vanes 43 which are of L-shape in cross section and which are pivoted at their ends, intermediate their side edges, to the sides of the frame 4|, as indicated at 44, whereby they are individually rotatable with respect to said frame.

Each vane 43 includes a rear portion 45 which is disposed substantially parallel to the housing 40, and a front or forwardly extending portion 46 which is disposed at substantially right angles to the rear portion 45. The front portions 45 of said vanes are pivotally connected, as indicated at 41, to a bar 48, and said bar is pivoted at one end, as indicated at 49, to the housing 4|) at a point adjacent to and forwardly of the hinge 43. The frame 4|, the vanes 43 and the bar 48 thus constitute a parallelogram structure which is swingable between the full line position shown in Fig. 1 and rearwardly inclined positions relative to the housing 40, as indicated by dotted lines in Fig. l.

When the frame 4| is disposed within and parallel to the housing 4|), as shown by full lines in Fig. l, the rear end portions 45 of the vanes 43 are disposed in a common plane parallel to the frame 4| and said housing 40 and in edge to edge relationship so that they substantially completely close said frame 4| and prevent any flow of air therethrough from the duct I5 to the device A. When, however, the frame 4| is swung rearwardly to any position of inclination relative to the housing 48, the rear portions 45 of the vanes 43 become spaced apart due to the bar 48 constraining said vanes to rotate about their pivots as they swing bodily rearwardly with said frame 4|. In other words, the parallelogram structure including the vanes 43 maintains the rear portions 45 of said vanes in planes parallel to each other. Consequently, as the frame 4| is swung rearwardly, the rear portions 45 of the vanes 43 progressively separate and assume a stepped or echeloned relationship to each other so that air may flow between them. In this connection, the damper B is, of course, mounted in the duct I6 so that the free edges of the portions 45 of the vanes 43 face counter to the direction of flow of air through said duct. It follows, therefore, that as the frame 43 is swung rearwardly, air enters between the rear portions 45 of the vanes 43 and is deflected forwardly into the outlet device A by the front portions 4t of said vanes. In addition to being eective to accurately regulate the amount of air delivered to a device such as the device A, a special advantage of a damper of the type illustrated and described is that it is effective to distribute the air substantially uniformly to all parts of the device A.

For swinging the swingable parts of the damper B. there is provided a rod 49 which is suitably connected at its rear end to some swinging part of said damper, such as the bar 48, and which extends forwardly therefrom. In this connection and in accordance with the present invention, the shaft |8 is hollow and contains another hollow shaft or tube 50 into which the rod 49 extends. The shaft, or tube 5|) is rotatable relative to the shaft I8, but is suitably held against longitudinal movement relative thereto. The rod 49 is threaded and has threaded connection either directly with the shaft or tube 50 or, as shown, with a nut 5| suitably Xed to said shaft or tube 50. In any event, since said shaft or tube 58 is held against longitudinal movement by the shaft I8 and has threaded connection with the rod 49, it follows that rotation of said shaft or tube 58 will result in longitudinal movement of said rod 49 which, in turn, will result in swinging of the frame 4|. Obviously, depending upon the direction and the amount of rotation of the shaft or tube 50, the frame 4| may be swung to a closed position as shown by full lines in Fig. 1 to deny now of air from the duct I6 to the outlet device A, or to any of an infinite number of angular positions relative to the housing 40 to admit more or less air from said duct to said outlet device.

While any suitable means may be employed to hold the shaft or tube 5|] against longitudinal movement relative to the shaft |8, suitable means for this purpose may comprise a flange 52 at the rear end of the shaft or tube 50 overlying the rear end of the shaft I8 to hold said shaft or tube 563 against forward movement relative to said shaft |8, and a spring nnger 53 at the front end of said shaft or tube 5B engaging a forwardly facing shoulder 54 at the front end of said shaft I8 to hold said shaft or tube 50 against rearward movement relative to said shaft I8. The flange 52 may comprise part of the nut 5| and the spring finger 53 may frictionally engage the inner face of the shaft |3 to hold the shaft or tube 58 in any position of rotation to which it may be adjusted.

While any suitable means may be provided to facilitate rotation of the shaft or tube '58, said shaft may appropriately be provided at its front end with a slot 55 with which a screw driver or other suitable turning tool may be engaged. The slot 55 may be provided in a plug 56 for closing the front end of said shaft or tube 5|] and said plug may be employed as a fastening means for the spring finger 53. In other words, the spring finger 53 may include an anchoring portion 51 confined between the plug 56 and the inner face of the shaft or tube 50.

As will be apparent from the foregoing, the shaft i8 of the present outlet device A constitutes a supporting and guiding means for the means for adjusting a damper either of the swinging vane type, as shown, or of a type adjustment of which is effected by swinging or other forward and rearward movement of an air flow regulating member or members.

Referring now to the alternative construction illustrated in Fig. 5 of the drawings, 23 designates spider arms corresponding to the spider arms 23 of the Figs. l to 4 construction, and I8', I9 designate a pair of annular members corresponding to the annular members |9, I8 of the Figs. 1 to 4 construction and between which the inner ends of the spider arms 23 are conned as in the Figs. 1 to 4 construction. A shaft |8', correspending to the shaft I8 of the Figs. 1 to 4 construction, extends through the members I8', I9 and carries at its rear end a nut or other suitable abutment 58 `and at its front end .a nut or other suitable abutment 59. Between the abutment 58 and the rearmost of the members i9 is interposed suitable yieldable means such as a helical expansion spring Sil which may surround the shaft i3', while between the abutment 59 and the rear end of the smaller or innermost flaring member I3', which is maintained spaced from the forwardmost member i S by a sleeve 32' as in the Figs. l to 4 construction, is interposed a 'bellows 6I. Thus, the spring @il tends constantly to shift the shaft I3 rearwardly and to compress the bellows 6I, and said bellows is effective, by expansion, to shift saidshaft i8 forwardly.

vBetween the members I9'., i9 the shaft I8 is provided with external screw threads @il which `may be formed either directly upon said shaft or, asshown, upon a sleeve t3 welded or otherwise suitably fixed to said shaft. In any event, a nut 2S', corresponding to the nut 2S of the Figs. 1 to 4 construction, is engaged with said screw threads 52 and is connected with arms 25', corresponding to the arms 25 of the Figs. 1 to 4 construction, in the same manner as the nut 28 is connected to the arms 25.

As will be apparent from the foregoing, the shaft l 8 is effective, either by longitudinal movement thereof relative to its supporting spider arms 23', or by rotation, to shift the nut 28 forwardly or rearwardly and thus swing the levers 2.5' to adjust the second flaring member of the device either forwardly or rearwardly relative to the outermost flaring member of the device.

Forward movement of the shaft I may be effected by admittingr a suitable iiui'd under suitable pressure to the bellows Sl to expand the same, and admission and escape of such fluid to and from said belows may be under either manual control or, if desired, under thermostatic control, whereby the second iiaring member is 'adjusted in accordance with changes in temperature of the air delivered through the `outlet device. If the admission of fluid to and from the bellows I is under therm-o'static control, rotation of the shaft I8 need only be employed to effect a desired initial adjustment of the second flaring member of the device, since thereafter automatic longitudinal movement of said shaft I8', in one direction by the spring Sii an-d in the other direction by the bellows S l, will be effective to produce required adjustments of said second flaring member.

Fig. 6 of the drawings illustrates a construction which is generally the same as the Figs. `l to 4 construction, except that arms 6d, rigidly connected to the second liaring member of the device, are employed in lieu of the pivoted levers 25 of the Figs. l to fi construction.

While the members IB, Il, l2 and I3 have been illustrated by way of example as being of :daring form, it is desired to point out that some or all of said members may be of more or less flat or disk-like or of any other desired form within the purview of the invention.

From the foregoing description considered in connection with the accompanying drawings, it is believed that the rconstruction and operation of the invention will be clearly understood `and its advantages appreciated. It is desired to point out further, however, that while only certain specific structures have been illustrated `and 4described, the invention is readily capable of embodiment in specifically different structures 1.0 within its spirit andscope as `dehned in the appended claims.

We claim:

1. A device for delivery of air into an enclosure, said -device comprising a vrst member of hollow flaring form 4open at its ends for Vflow of air therethrough from its smaller end toward its larger end, a second member of haring form smaller than said rst member and spaced inwardly from the latter to effect lateral .deflection of air flowing through said first member, and means securing said second member to said rst member for longitudinal adjustments relative to thelatter to vary the direction of lateral deection of air from the device, Vsaid securing means including a threaded shaft disposed coaxially .with said members. means homing said Shaft againstflongitudinal movement, a nut threaded on .said shaft, means holding said nut against rotation whereby it is movable along said shaft by rotation of the latter, and levers pivotally supported intermediate their ends by said first member and operatively connected at their ends tov .ar-ms connected to said first member, a threaded shaft supported co-axially .with said members by said spider arms for rotation and for longitudinal movements, means for .longitudinally .moving said shaft and for resistingits longitudinal movement from any position to Vwhich it may lbe longitudinally adjusted, .a nut threaded on said shaft for longitudinal.adjustments therewith and held against rotation whereby it is adjustable along said `shaft by rotation of the latter when longitudinal movement of the same is resisted,

and connections between `said nut and said second member whereby the latter is supported in said first member for longitudinal adjustments relative thereto and Vis longitudinally adjustable by lfongitudinal adjustments of said nut with said s. a t.

V3. A device .for delivery of air into van en-closure, said device .comprising a `rst memberof hollow flaring form open at its ends for flow of air therethrough from its smaller end toward its larger end, a second member of flaring-form smaller than said first member .and spaced -inwardly from vthe latter to effect lateral deflection of air flowing through said -flrst member, spider arms connected to said rst member, athreaded shaft supported coaxially with said members by said spider arms for rotation and for .longitudinal movements, spring means for moving said shaft longitudinally in one direction and uid pressure means for moving said shaft longitudinally in the opposite direction whereby it is longitudinally adjustable and is held against longitudinal movement from any position to which it may be longitudinally adjusted, a nut threaded on said shaft for longitudinal adjustments therewith and held against rotation whereby it is longitudinally adjustable along said shaft by rotation of the latter when the same is held against longitudinal movement, and Vconnections between said nut and said second member whereby the 'latter is supported in said first member for longitudinal adjustments relative thereto and is longitudinally adjustable by longitudinal adjustments of said nut with said shaft.

4. A device for delivery of air into an enclosure, said device comprising a first member of hollow flaring form open at its ends for flow of air therethrough from its smaller end toward its larger end, a second member of flaring form smaller than said first member and spaced inwardly from the latter to effect lateral deflection of air flowing through said rst member, and means mounting said second member for adjustments longitudinally relative to said first memlber to vary thedirection of discharge from the device of air delivered through the device between said members, said mounting means comprising an adjusting element disposed axially of the device and mounted for adjustment longitudinally of the device, means exposed at the front of the ldevice centrally thereof for adjusting said 'element longitudinally of the device, a spider arm fixed to and extending inwardly from said first member and serving as a support for said mounting means, an `arm connected at one end to said second member and having -a laterally separable connection at its other end with said adjusting element, said spider arm having spaced apart said walls disposed to either side of said laterally separable connection and holding the latter normally against separation.

5. A device for delivery of air into an en-closure, said Idevi-ce comprising a first member of hollow flaring form open at its ends for flow of air therethrough from its smaller end toward its larger end, a second member of flaring form smaller than said first member and spaced inwardly from the latter to effect lateral deflection of a/ir owing through said first member, a shaft supported by said first member coaxially with said members, means whereby said second member is adjustable by said shaft longitudinally relative to said first member to vary the direction of discharge of air from the device, a damper disposed behind said device and including means movable forwardlyand rearwardly relative to said ydevice to regulate the supply of air to said device, a threaded actuating rod for the said movable means of said damper extending forwardly from said movable means, said shaft being hollow, and a secondhollow shaft mounted in said first shaft for rotation and held against longitudinal movement relative thereto, said rod extending into said second shaft and having threaded connection therewith whereby it is longitudinally adjustable to actuate the movable means of said damper by rotation of said second shaft.

6. A device for delivery of air into an enclosure, said device comprising a first member of hollow flaring form open at its ends for flow of air therethrough from its smaller end toward its larger end, a second member of flaring form smaller than said first member and spaced inwardly from the latter to effect lateral deflection of air flowing through said first member, a hollow shaft supported by said rst member coaxially with said members, means whereby said second member is adjustable by said shaft longitudinally relative to said rst member to vary th-e direction of discharge of air from the device, a damper disposed behind said device for regulating the supply of air to the latter, an adjusting rod for said damper extending into said shaft, and means accessible at the front end of said shaft for adjusting said rod longitudinally relative to said shaft to regulate said damper.

7. A device for delivery of air into an enclosure, said device compris-ing a first member of hollow flaring form open at its ends for flow of air therethrough from its smaller end toward its larger end, a second member of flaring form smaller than said first member and spaced inwardly from the latter to effect lateral deflection of air flowing through said first member, a hollow shaft supported by said first member coaxially with said members, means whereby said second member is adjustable by said shaft longitudinally .relative to said first member to vary the direction of discharge of air from the device, a damper disposed behind said device for regulating the sup-ply of air to the latter, a threaded adjusting rod f-or said damper extending into said shaft, and an element in said shaft with which said rod has threaded connection an-d which is rotatable to longitudinally adjust said rod to regulate sai-d damper.

FRANZ J. KURTI-I. LEONARD R. PHILLIPS. WILLIAM J. WAELDNER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 604,371 Cook May 24, 1898 2,083,621 Smith June 15, 1937 2,125,454 Marshall Aug. 2, 1938 2,197,614 Hall et al. Apr. 16, 1940 2,217,944 Collicutt Oct. 15, 1940 2,229,747 Kurth Jan. 28, 1941 2,252,264 Kurth Aug. 12, 1941 2,311,195 Young Feb. 16, 1943 2,345,938 Kurth et al. Apr. 4, 1944 2,365,867 Dauphinee Dec. 26, 1944 2,369,119 Dauphinee Feb. 13, 1945 2,403,291 Kurth July 2, 1946 FOREIGN PATENTS Number Country Date 16,654 Great Britain 1909 365,048 Great Britain Jan. 11, 1932

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