US2652193A - Ventilating fan - Google Patents

Description

Sept. 15, 195 c. A. LINDBERG ET AL VENTILATING FAN 2 Sheets-Sheet 1 Filed Oct. 25, 1947 6 Hawmen w. EcKLEs,

Sept. 15, 1953 c; A. LINDBERG ET AL VENTILATING FAN 2 Sheets-Sheet 2 Filed Oct. 25, 1947 hw En/ToQ5 CHE w. H. LII/DEERE, l/a wfiED w. ECKL Es,

Patented Sept. 15, 195 3 "VEN DIL G FAN 'igaryl =A."- Izinliberg, Glendale, and Howard W. Eekles, St. houis,*Mo., assignors-to The "Emerson lilcmt'ricLManufacturing Company, St. 5 Louis,

Mona corporation of Missouri ZiUNlZlZED PATENT {F FICE 18 Glaims.

here n nve t onrel tes'te mp me t in" the construction of electric? fans; particularly v ntilat n t ans bf be' tynewher m th culating blades? revolve. hp'ri zorit'eilly, theflmotor bein untedw th i s sheit" mve ti'c lposition.

"The priiicipali bi e t th in e tion i to r vide an mp o ed ent atin anw 9.1. 7 'smfd y onstrun drliieh iewe 'eht hemf m d l portabl and viliich is adap ed" t ir u a e m ximum vo ume or: a r w thou crea g slightest semblance f rajt,

Another Qbjectis xmro iidea i n essem wh rein atnovelteme' :cooetm tiqiiis a Piedt diffuse the: ianr a itated ai "o er are of r e pe ent t an h t momm e tent on devices b ithisitypeovel m se; pro ided" here assembl t e str c u al icomnonent is e ee l cil ated hmongthe f a ures i lie inven ion i moto up in brack t whi h mayb "Quickly n easily e e shoifld he mused-re r II'Ihe. inventiontalsfl wrisistsginthe construction and" gin ,the com i e Mid a angem n s f parts described andgcl' um ou add iona a d advanta of,the.. invention will be reterred to n theldescriptionto .Io11ow,.reierenfi beingl d also to the drawin a W h-ie 6-. ln 0ni 1u$tI Ifl In said drawings: 7

Fig. 1 .isa irontelevational view jofjthe invention;

- Fig. 2 isa bottom plan view thereof Fig; 3 is alhorizontjal sectional uiewvthereof on the line 3-3 of Fig. 1;

Fig. 4 is a similar. sectionalview ,onathe :line 44 of Fig. l;

i Fig. 5 is a vertical sectional view substantially onthe line 5- 5 of Fig.1;

Fig. 6 is a fragmentary riewcon an enlarged scale of the upper righzt .handpontionyof Fig. ;5;

Fig; 7 is a similar view-f thfi leentral and lower right hand portion of Fig. 5,=sounea;bi ethe structure being broken awayaforhclarity;

Fig. 8 is a horizontal sectionalviewtoniithe line 8B of Fig; 6;

Fig. 9 is a's-imi'lar vieWonthe'line'S- O pf Fig. '7;

"Fig. 10 is a fragmentary *sectionalwiew 'of a housing support,1il-lustratingistructural details; v

Fig. ,11 is an elevational view of aguardicleat per se;

. vFig. 12 is afsimilar view o f the. motor supportme bracket witha ortion h reo i s rti n; and

"Ri 13 i.sa"imnt.e1evaoona1 n w O 'i'the r tircular "guard member which supports abafile and top cover assemblyoi the-invention.

""With"particulanreierencenow to Figs. 1 to 5, inclusive, the ventilating fan of the present inventionis generally indicated 20, It includes a circularhousing'designated 2|," an annular bottorn therefor generall designated 22, and supporting members pr standards generally indicated 23.

The housing. 2|; as illustrated, is preferably constructed. of expanded metalLbut obviously it may' consist oi a rigid; perforated structure of other design.

Preferablygtheleg portions of said supporting inemloers uareprovidedqwith rubber pads or bumperelements'fi, asshown.

"Centrally "of and within "the" housing 2| is mounted. an electric; motor, which, may be :connected to a-source of electrical energy by means of a cord "21 and plugZB. The motor is mounted, withits driveisha ftzg in vertical position, in a novel mannerby meansiof a bracket member generally indicated 139, andshown per se inFig. 12.

' A fan blade assembly comprising blades 31 and a hubmember 32, to which theyare secured, is fastened to the projecting. upper end oftl eshaft 29 by means of a setscrew'33, asshown in Fig. 5.

"Securedadjacent the upper peripheral portion of the housing in a manner to appear hereinft is a i ularope i u rd m be r lly designated 3. and'shovvr'r per se in Fig. 13. Supported by the guard member'fl l in a. manner to be described, is a battle member, generally designated 35, and a top cover plate generally indicated '36.

-With particular reference now to Figs. 7, 9 and 10, it will be seen thateacli of the supports 23 is substantially 'ohannele shaped in horizontal 0 1 .55 s c ion and terminate in a a closed rounded upper end-"40 which impinges against an inverted Veshaped 'trin11ring @IjjWhiQh is clamped over the upper peripheral edges: "oft-he housing? I "Fromthe' top*40,"'-the"two side flanges 43 of each support 13 oontinue downwardly adjacent thehousing "2i, abovethedower end 44 of which eachiflange' 43 has i formed therein a semi-circular. notclr'45 which receives a split trim ring 45. This trim ring also in contact with the up r per phfim Ed e i l of th hottom member .1 amim i si ire er phery- As b tseen inF "l rea i fl n e 43, a

short distancebelowthenotch"'45, is widened considerably ;to provide a Substantial arcuate seat 348 iornthe bojttoin memberiZ, the annular marg n po t n 1 5 'o 'wh h es din ly arcuate. "The six arcuateseatsuthus provide 3 ample supporting means for the bottom member 22 to which, in a manner tobe described, the motor supporting bracket 36 is removably secured.

In addition to the side flanges 43, each standard 23 includes an integral web portion 59 extending from top to bottom thereof, as illustrated. Vertically spaced upper and lower stud elements and 52, each comprising shank portions 53 and head portions 54, are spot-welded as at 55 to the web 50 of each standard, as shown most clearly in Fig. 10.

The annular guard member 34 preferably ineludes an upper ring 60, a lower ring 62, and an intermediate ring 6|. These rings are maintained in spaced parallel relation by being welded as at 63 to a plurality of uprights including single bars 64 and double bar elements generally designated 65.

In the embodiment of the invention illustrated, six single bars 64 and three double bar members 65 are provided. While a greater or lesser number of uprights may be employed, the selected quantity has been found adequate to support the baffle member 35 and the top cover 36 of the fan.

As shown especially in Fig. 13, the upper end 68 of each single bar 64 terminates a short distance above the ring 69, and the lower end 69 terminates a short distance below the lower ring 62. each element 65 are connected at their upper ends by an integral horizontal cross bar 13.

Thus, each element 65 is of inverted U-shaped configuration, with its horizontal or bight portion 13 extending above the upper ends 68, and its vertical or leg portions 72 extending below the lower ends 69 of the single bars 64. As shown particularly in Fig. 3, the single bars 64 are arranged in pairs spaced apart a distance similar to that obtaining between the uprights T2 of each member 65. It is also seen that the double bar elements 65 alternate with the pairs of adjacent single bars 64, sothat a symmetrical pattern is presented.

Approximately intermediate the lower ring 62 and the lower extremities T5 of each pair of legs 12, there is welded to said legs, as at 16, a rectangular plate 18 provided with a slightly elongated aperture 19. Three apertures l9 are thus provided, they occupying a position one hundred twenty degrees apart on a circle described from the center of the device.

Three similar apertures are provided in the bottom cover 22a short distance below the upper edge 41 thereof.

The manner in which the standards 23 are secured to and support the device will now be described. The standards 23 are three in number and are equally spaced one hundred twenty degrees apart. They are similar in all respects with one exception, that being the provision of a hole 82 in the front standard only.

As illustrated in Fig. 7, the purpose of this opening is to support the casing 83 of a manually operable three-speed switch of conventional design, as will appear. A suitable opening 84, to accommodate the switch casing, is provided in the housing 2| in line with the opening 82. The switch has a threaded projection 85 which passes through the hole 82 and receives a nut 86, which, when tightened, maintains the switch 83 in place on the standard. A washer may be interposed between the nut 86 and the web portion 50, or,

be so interposed.

It is also seen that the upright bars 12 of A suitable knob may be secured to the project ing squared end 88 of the switch stem by means of the screw 89, or in any other well known manner. Thus, the speed of the motor may be manually regulated, as is understood. It is also evident that removal of the knob, by. extracting the screw-89 followed by-screwing off the nut 86, is all that is required to dismount the switch casing 83.

V In the assembled device, as also shown particularly in Fig. 7, one of the three apertures 19 is in vertical alignment with one of the three apertures Bilin the bottom cover 22. Furthermore, the aperture 19 is in horizontal alignment with the stud 5|. The latter passes through the perforated housing 2|, thence through an elongated opening 90' in a relatively narrow vertical strip of metal 92, and thereafter through the aperture 19 to receive a speed nut 94.

The metallic strip 92, referred to above, is welded or otherwise secured to the housing 2| for the purpose of providing an opening 90 of a size and shape corresponding to that of the openings l9 and 80. Obviously, a'strip 92 is secured to the housing 2| opposite each standard 23. Op posite the front standard, the upper edge of said strip abuts the lower edge of the trim ring 4| and extends downwardly until cut off, as at 93, because of the presence of the switch 83. The remaining two strips 92, one of which is depicted in Fig. 5, extend substantially from the trim ring 4| to the lower end 44 of the housing.

From the foregoing, it should be evident thatv an arrangement has been provided which admits of ready assembly or disassembly of the upper portion of the housing 2|, the upper portion of each standard 23, and the lower portion of the guard member 34. As shown in Fig. 7, the lowermost ring (52 of the guard member rests upon the upper edge of the trim ring 4| which, as will later appear, facilitates the assembly operation. With reference now tothe lower right hand portion of Fig. '7 and Fig. 10, the standard 23 provides six seats 48 to receive the bottom 22, as has been previously explained.

Since the studs 5| and 52 of each standard as well as the apertures 19 and 89 are in vertical alignment, the stud 52 passes through the aperture 8t and thence through the lower portion of the housing to receive a speed nut 99.

Referring briefly to Fig. 5, it is noted that, where the strips 92 extend from top to bottom of the housing, the studs 52 also pass through an opening similar to the opening 9!! previously referred to and for the same purpose. In other words, each of these two strips has a slightly elongated opening 99 therein adjacent its lower as well as its upper edge. It is thus seen that an arrangement has also been provided adapted for ready assembly or disassembly of the lower portion of the housing 2 l, the lower intermediate portion of each standard 23, the bottom member and supported by the guard member 34 aboveand in spaced relation to the blades 3 i.

As illustrated in Figs l, 3, 5 and 6, the baffle member consists of a shell H32 of frustoeconical contour, merging into an annular 'arcuate portion H33, the latter terminating in an upstanding annular flange H14. At equally spaced intervals around its peripheral margin, the baffle has formed therein one of a series of six similar in-' dentations or depressions I96 to accommodate 5, the upper ends 68 and i3, respectively. of the upright members and. V V

As seen at the u'ppenleft in"1 =ig."5,the upper end 68 of eachsinglebar 64 terminate flush with the top edge of the flange: I04. The'fbight por tion '53 of each double bar 'member"65,hoWever, as seen in Fig. 6, extends "above the upper'edge of said flange, and restsiupon the'horizontal flange Hi8 of a guard cleat I09 I There are three guard cleats" I09, on ror each double bar member 65. In addition to the horizontal flange I58, each of these cleats includes a vertical flange I III in contact withandextending across the pair of uprights I2 of each 'niember as, as clearly illustrated in Fig. 8.

Welded to the vertical flange III) centrally or each cleat I99, as at Il '2, is the head portionof a stud element I I4, the shank "portion II5-of"which is horizontally disposed.

In regard to the depressions I05, it isseen by reference to Figs. 6 and 8 that eachdncludes a perpendicular can I Ira-ans side walls H9; ,-a11 merging into the marginal 'periphery of thebafiie inember. As viewed in hori'ziintal cross Section, the corners iZIJ-which join the'perpendicular wall with the side walls are arcu'ate to snugly engage the upper ends ofthe uprights-12 or"640f the uard member. e e I There is an aperture; in thewall I IB-'of each of thosethreedepressions? Ilfiflwhichare in line with the standardsfl23 'Ihe--s"hank* H5 of a stud IM passesth'rdughthis apertureand receives a speed nut l24. annularrou nd'ed groove or depression flt interrupted only'b'y the indentations I 96; is "alsoprovided on "the bafile member and receives the uppern'ro'sla arrest of the guard member to facilitate-assembly, as will appear later. 7

It should now be evident that there'is provided an arrangement which admits of ready assembly and which maintainsthe bafile member 35 rigidly in position on the upper part of the guard member 24.

The cover 36 comprises a hat top portion I30 merging into an annular marginal portion I3l, which fits over the annular flange I04 of the baffle member with its bottom peripheral edge I32 res ing upon the ring 60- of-the guard member, as illustrated in Fig. 6. e

A plurality of U-shaped brackets I34, the legs I35 of which have laterally extending flanges I36, are welded, as at I 31, or otherwise securedto the top I353. Four such brackets areprovided in the device illustrated, they being spaced'ninety degreesapart. An opening I'38 is formed inthe web portion Ittof eachbracket to receive a screw Hill, the lower end "of which terminates an enlarged head Ill, which'has a' ker-f therein.

.A plurality ofapertures I43, equal in number and in alignmentwith the apertures I38yis provided in the baiile member "25. Each 'of the apertures I43 is formed inthe horizontalwall I M of one of a seriesof four indentations I45,-whereby a fiat surface isprovidedfor-theheadI4I1 to bear against, as seen in Fig.6. I

One of the features of the invention, as previously indicated, is the arrangement wherebythe motor driven fan assemb1y,"with its associated electrical connections, is readily remoyabieyas a unit whenin need of repair, or for anyother reason. g V

To this end, the bracket'3 0jis so'designed' that all these parts maybe attachedthereto, 'and'the bottom member '22 ha anfopen ng 1'50 therein which is nighuymrger diameter than'th'at 6 of the fan blades, so that the assembly may be inserted into or withdrawn from the housing?! with ease.

The bracket an is shown detached in Fig. 12, in bottom plan in Fig.'2,'and in vertical section in Fig. 5. It includes a substantially circular central body portion I52 from which three integral laterally extending armlss emanate, the center lines of the arms'be'ing spacedonehundred twenty degrees apart.

From the central body portion I52, each arm I53 extends angularly upwardly asat I 54' to terminate in a horizontally disposed end portion I 56, a depressed reenrorc'ing rib I5lon' the center line serving to strengthen each'arm in this region. As shown in the drawings'the entire bracket is further strengthened. by upstanding flanges I58 formed along the side margins of the arms and the body portion.

Means are provided'on one 'of the arms I53 to mount a choke c011 assembly, saidassemblylbeing designated I60.

The arm referred to being the one in line with the front standard 23 is also provided'with an insulated opening Itl through which the cord 21 passes. In all other respects, the three arms I53 are identical.

To provide the support for the assembly I60, each side flange I58 of thearm aforesaid is'provided intermediate the body 'portion I52 of the bracket and the arm endl56 withan'integral upward extension ltd terminatingin a horizontal laterally projecting flange I55. Each flange 165 has therein one or more apertures I66, whereby the assembly I60 maybe secured thereto by screws, or the like.

With particular reference to Fig.'2 and the lower portion of Fig. 7, themeans whereby the bracket 30 is detachablysecur'ed to the bottom member 22 will now be described.

Integral with said bottom member, and extending inwardly into the opening I50, are three ears 68 each provided with a pair'of'sp-aced threaded apertures I59. The end portion I56 of each arm likewise has a pair of spaced openings IIO therein in alignment with the apertures I59.

Each opening I'III isprovideu with a rubber bushing I'II through which'a screw IIilpasses, and thereafter through an aperture I59. A metal washer IN is interposedbetween the head I75 of the screw and the bottom face of the bushing III to provide adequate bearing surface for said bushing. With this arrangement, the'bracket Ell as well as the screws I12 are insulated from the housing.

The central body portion of "the'bracket has formed therein a plurality of upstanding hollow bosses I78, each of which has a'ce'ntral aperture. In the embodiment ill'ustratedyfour such bosses are shown, they being spaced ninety' degrees apart.

Similarly, the casing of 'the motor 26 includes four bosses I from each of which the threaded lower end I8I'of a field stud projects. Each of these projecting ends pass through one of the apertures in the bosses I'I'8' to receivea lock washer and nut assembly 182. "Thus, the motor and its associated fan assembly is-securelyfastened to and supported by said bracket.

The novel design of the structure descri-bed has, from a production'standpoint, many advantages which have not been hereinbefore mentioned. For example, a single die is utilized to fonmt'he top and bottom'cover members. Ihe' metal re- 7 moved from the bottom member in forming the opening I50, instead of being scrapped, is used to form the three standards 23. Also, a single die is used to form all three standards.

Assembly and operation The construction of the present fan is of such character that it obviously can be quickly assembled and just as quickly disassembled. The steps in an assembly operation need not necessarily follow one another in the exact order set forth below. However, such procedure has been found very satisfactory in line production.

It is, of course, understood that, before the assembly operation is begun, the top member 36 will have the brackets I34 welded in place, and the standards 23 will have the stud elements 51 and 52 spot-welded thereto in proper position. Also, the bracket 30 will have the motor 26 and the assembly I60 securely attached thereto, and each cleat I09 will have a stud element I I4 spotwelded thereto. The housing 2i will have the strips 92 welded thereto in proper position one hundred twenty degrees apart and will also have the trim member HI and the bottom cover welded thereto.

In other words, the housing 2i, strips 92, trim H, and bottom cover 22 constitute a unitary structure or subassembly over the lower end of which the split trim ring 45 is slipped into place. This assembly is placed on a fiat surface, such as a table, or the like, whereupon the guard assembly 34 is put in place.

Thereupon, the standards 23 are put in place, the entire assembly being permanently fastened together by means of the six speed nuts 95 and 98 pushed down, respectively, over the shank portions of the studs 5| and 52.

The bafile member 26 is next put in position, the upper ring 60 of the guard member 31% cooperating with the groove I20 to maintain the battle in place during succeeding operations. The uprights of the guard member 34 enter the indentations I06 when the baffle is put in position, the upper ends 68 of the bars 64 terminating approximately flush with the upper edge and the bight l3 of the double bar members 65 extending above the uppermost edge of the baiile flange I 5.

The cleats I09 are now installed, the studs H4 passing through the apertures I22, whereupon the speed nuts I2 3 are applied. This brings the horizontal flange I08 of each cleat under the adjacent bight portion I3 of a double bar member (55, and, at the same time, brings the vertical flange IIO into engagement with the legs I2 thereof.

The addition of the top cover 36 now follows. By aligning the threaded aperture I33 of one of the four brackets I34 with one of the four openings I53 in the bafile member, and thereupon inserting a screw I40, automatic alignment of the remainder is effected. Excessive tightening of the screws I40 is prevented relative the cover by the top ring 60 of the guard member, and relative the baifie member by the flanges I08.

In order to mount the fan assembly, the structure thus far assembled is now inverted with the top cover 36 resting on the table. The bracket 30 is then put in place, the fan assembly passing through the opening I50 into the interior of the housing. The screws I72 are then inserted, each passing successively through a metal washer I'M, a bushing III, and into an aperture I69. The switch 83 is mounted in place by means of the nut 86, and the control knob is attached by means of the screw 80.

As is apparent from an inspection of Fig. 2, the interior of the housing is readily accessible due to the large diameter of the opening I50 and the configuration of the bracket 30.

In operation, the fan of the present invention produces circulation of air over a wide area without creating a draft. With the frusto-conical peripheral arrangement, the air flows angularly upwardly, as well as laterally, in all directions. Noise is almost entirely eliminated, since there is no metal to metal contact between the fan assembly supporting means and the remaining structure.

The tendency of a motor to wobble, when mounted in a vertical position on a seat of rubber, or the like, is well known. In the present construction, all wobbling is eliminated by the sixpoint resilient support afforded the bracket 30 to which the motor is rigidly secured.

What we claim is:

1. In a fan construction of the character described, a circular perforated housing, a bottom cover member therefor containing an opening, said opening being adapted to pass a fan assembly including a motor and fan blades, a plurality of individually removable and replaceable spaced standards to support the housing and the bottom cover member in an elevated position, a guard member also supported by said standards, a fan assembly mounted centrally of and within said housing, a bafile member mounted abov said guard member, a support for the fan assembly, and means whereby said support is removably attached to the bottom cover member of said housing.

2. In a fan construction of the character described, a circular housing, an annular, flanged bottom cover member therefor, a plurality of spaced standards to support the housing, a fan assembly including a motor mounted centrally of and within said housing, a support for the fan assembly comprising a bracket including a central plate-like body portion from which a plurality of integral laterally extending arms emanate, means for rigidly attaching the motor included in the fan assembly to said support, and means whereby the support is removably secured to the bottom cover member of said housing, said means comprising a pair of screw elements each passing through alined openings formed in the end portion of each arm of said bracket and in the bottom cover, and through a resilient bushing provided in each of the first named openings and interposed between the bottom cover and said end portion of each arm.

3. A ventilating fan including a cylindrical housing, air circulating means within and centrally of said housing comprising a motor with a vertical shaft having a plurality of fan blades secured to one end of said shaft, a bracket including a central plate-like body portion and a plurality of integral arms extending laterally therefrom, means to affix the casing of the motor to the central portion of said bracket, a bottom cover, member for the housing having an opening therein, and means for removably fastening the bracket to the bottom cover member so as to electrically insulate it therefrom and permit limited relative movement thereto.

4. A ventilating fan including a cylindrical housing, air circulating means within and centrally of said housing comprising a motor in vertical position with a plurality of fan blades a bracket including a central body portion and I 9; V v a plurality of integral arms extending laterally and. angularly. upwardly therefrom, apertured upstanding hollow bosses on thelbody portion of thebracket, bosses on the motor casing each having the threaded end of a stud projecting therefrom and. passing through one of said apertured bosses, means to engagesaid threaded ends andrigidly secure the motorto said bracket, a bottom cover member for the housing containing an opening, and means to removably' secure the arms of said bracket to said cover member.

A ventilating fan construction of the type described, including a circular housing, a bottom cover member containing an opening, spaced standards removably secured'to said housing and the bottom cover member, an annular guard assembly including a plurality of horizontally disposed members in parallel spaced relation fastened to a series of uprights, means on the uprights cooperating with means on each standard for securing the guard assembly to the latter with parts of the guard assembly-extending above the upper edge of the housing, and a baffie member mounted on and supported by said guard member above the fan assembly in spaced relation thereto.

6. A ventilating fan construction of the type described, including. a circular housing, a bottom cover member containing an opening, spaced standards secured to said housing and its bottomcover, an annular guard assembly including aplurality of horizontally disposed members in spaced relation fastened to a, series of upright members to form a unitary strueture, means to secure the latter to the standards with a portion thereof extending above the upper peripheral edge of the housing including a plurality of centrally aperturedplates rigidly secured to the uard assembly, and horizontally disposed stud elements to receive a speed nut rigid with each standard adjacent the top and adjacent the middle portion thereof.

7. In the ventilating fan structure described, means to diffuse the flow of air over a wide area, said means comprising an annular shell including a frusto-conical portion merging into an arcuate marginal portion which terminates in an annular upstanding flange portion, a first series of identical indentations formed in said marginal portion at equally spaced points around its periphery, a horizontal aperture in the vertical wall or at least one of said first indentations, a second series of indentations formed in said conical portion at equally spaced points adjacent the arcuate portion of the shell, and a vertical aperture in the horizontal wall of each of said second indentations.

8. A motor support for the ventilating fan structure described, comprising a bracket having a substantially circular central body portion, three laterally extending arms spaced one hundred and twenty degrees apart integral therewith, each arm including an angularly upwardly inclined portion terminating in a horizontally disposed end portion, reinforcing flanges formed along the side margins of each arm and the body portion, a pair of spaced apertures provided with a rubber bushing in the end portion oi: each arm, and a plurality of upstanding hollow bosses formed in said central body portion, each boss having a vertical opening therein centrally thereof.

9. A guard member to support the baffle and top cover mombers of the fan structure described, consisting of an upper ring, an intermediate ring, and a lower ring, allhorizontally disposed in spaced parallel relation, a plurality ofuprights including single bar and double bar mem-. bers conneotedto each ring as by welding or otherwise, the single bar members having their upper and lower endsextending a short distance above said upper and lower .igsrespectively, each double bar member being of inverted U-shaped configuration with its eight portion in a plane above the upper ends and its leg portions extending downwardly to a plane beyond the lower ends of said single bars, a plate welded to the leg orticns of each double bar member at a level intermediate the lower ring and the lower -;tremities of its legs, and a vertically elone gated opening in each plate centrally thereof,

re. In a ventilating fan, a guard member, a baffle member, and means for removably attachthe latter to theguard member including a cleat member containing a vertical flange and an integral horizontal flange, a horizontally dis.- posed. stud element having a head portion and a shank portion, head portionbeing welded or otherwise permanently, secured to said vertical flange centrally thereof.

11. In a device of the type described, a top cover member, a bottom covermember, and connecting means between said members, said cover members basically of the same shape and size so that they can be initially; formed from the same die, said top cover member including a closedfiat portionmerginginto an arcuate annular marginal portion which terminates in a vertical flange portion, aplurality of U,-shaped brackets secured to the underside of said closed flat portion, each bracket comprising a pair of upstanding legs, the upper endsof which tennis, nate in laterally projecting flange portions and the lower ends of which are joined by a horie zontal web or bight portion having an aperture therethrough; said bottom cover member com= prising a flat portion merging into an arcuate annular marginal portion which terminates in a vertical flange portion, an opening in said flat portion, a plurality of horizontally disposed ears extending inwardly into said opening, and threaded apertures in said ears.

12. In a ventilating fan; a vertically extending housing; a flanged bottom member therefor containing an opening; a fan assembly insertable through said opening and positioned within the housing; a bracket member supporting said fan assembly, said bracket member containing outwardly extending leg portions; and means comprising resilient bushings inserted in said leg portions for resiliently fastening the outer ends of the leg portions to the bottom member.

13. In a ventilating fan; a vertically extending housing; a flanged bottom member therefor containing an opening; a fan assembly insertable through said opening and positioned within the housing; a bracket member supporting said fan assembly, said bracket member containing outwardly extending leg portions removabl fastened to the bottom member; and means comprising non-conductive bushings inserted in said leg portions for electrically insulating the same from the bottom member.

14. In a ventilating fan; a vertically extending housing; an annular member secured adjacent the bottom of the housing, said member including an inwardly extending flange portion; a baflie member mounted above the housing; and a fiat cover member mounted on top of the baffle member, said cover member containing a down- 11 wardly extending flange portion; the bottom annular member and the top cover member being basically of the same shape and size so that they can be initially formed from the same die.

15. A baifle assembly for a ventilating fan, comprising a lower member including a frusto-conical shaped portion merging by reverse bends into an arcuate marginal portion terminating in an annular upstanding flange portion; a circular cover member positioned on top of the lower member and containing a downwardly extending annular flange portion which fits over the upstanding flange portion ofthe lower member; and means disposed inwardly of said marginal portion for removably fastening the cover member directl to the lower member,

16. A bafiie assembly for a ventilating fan, comprising a lower member including a frusto-conical shaped portion merging by reverse bends into an arcuate marginal portion terminating in an annular upstanding flange portion; a plurality of spaced apertured indentations in the frusto-conical shaped portion inwardly of said marginal portion; a circular cover member positioned on top of the lower member and containing a downwardly extending annular flange portion which fits over the upstanding flange portion of the lower member; a plurality of brackets fastened to the underside of the cover member in alignment with said indentations in the lower member; and means extending through said indentations for engagement with the brackets for removably fastening the cover member directly to the lower member.

17. In a ventilating fan structure, a vertical cylindrical housing, an annular guard member disposed at the top of the housing, said guard member containing a series of spaced upwardly extending projections; a baflie member contain ing a frusto-conical shaped portion which merges by reverse bends into an annular upstanding flange portion removably secured to said upwardly extending projections, the flange portion of the bafile member containing a series of indentations to receive'the guard projections; a plurality of leg members secured to both the housing and the guard member; and a circular cover member containing a downwardly extending flange portion removably fastened directly to the bafiie member, the flange portion of the cover member extending over the flange portion of the bafile member and the upwardly extending projections of the guard member to provide a finished appearanoe.-

18. A ventilating fan, comprising a circular perforated housing; an annular bottomcover member for the housing; a plurality of spaced standards removably secured to the cover member to support the housing in an elevated position; a guard member removably secured to and supported by said standards and extending above the upper peripheral edge of the housing; and a bafile member supported by the guard member above the housing.

CARYL A. LINDBERG. HOWARD W. ECKLES.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date D. 120,033 Kisling Apr. 16, 1940 D. 144,034 Budlong Mar, 5, 1946 1,712,698 Ginder May 14, 1929 1,715,669 Nuttall June 4, 1929 2,181,596 Conterman Aug. 6, 1936 2,294,399 Fukal Sept. 1, 1942 2,310,772 Fukal Feb. 9, 1943 2,331,056 Spear Oct. 5, 1943 2,342,596 North Feb. 22, 1944 2,398,380 Kisling Apr. 16, 1946

Images