US2081103A

US2081103A - Air circulating apparatus

Info

Publication number: US2081103A
Application number: US31584A
Authority: US
Inventors: Henry S Woodruff; Jr Paul T Engelskirchen
Original assignee: American Radiator Co
Current assignee: American Radiator Co
Priority date: 1935-07-16
Filing date: 1935-07-16
Publication date: 1937-05-18
Anticipated expiration: 1954-05-18
Also published as: GB460755A; FR810021A; US2081104A; GB460754A; DE676534C; FR810022A; DE676535C

Description

y 1937- H. s. WOODRUFF ET AL 2,081,103

AIR CIRCULATING APPARATUS Filed July 16, 1935 4 Sheets-Sheet 1 5 W INVENTORS M9 f r I Z6207? m aul/ l. dyJZ/CULM May 18, 1937. H. s. WOODRUFF ET AL AIR C IRCULATING APPARATUS Filed July 16, 19:55

4 SheetsSheet 2 11m, ATTORNEY.

Patented May 18, 1937 I UNITED STATES PATENT OFFICE- AIR CIRCULATING APPARATUS Application July 16, 1935, Serial No. 31,584

17 Claims.

far as certain of the broader aspects of our invention are concerned, it is not to be considered as limited to this particular type of construction or to this particular use.

The objects of our invention are to provide a device for circulating air which is simple in construction and operation and can be easily and quickly'installed; one which is comparatively quiet in operation; one which is capable of circulating a relatively large volume of air per unit of time for a given size of device; one which is provided with a relatively large air outlet and delivers air through all portions of the outlet at substantially the same desiredvelocity and pressure; and lastly, one which can be easily and quickly assembled and disassembled and is relatively inexpensive to manufacture.

The invention consists in the novel construction and combination of parts, to be more fully described hereinafter, and the novelty of which will be particularly pointed out and distinctly claimed.

. p In the accompanying drawings, to be taken as a part of this specification, we have fully and clearly illustrated a preferred embodiment of our invention, in which drawings Figure 1 is a plan viewshowing a window ventilator constructed in accordance with our invention as installed in a window opening and operating to deliver clean fresh air into a room; Figure 2 is a front elevation of the window ventilator illustrated in Figure l;

Figure 3 is a transverse vertical section of the device, the section being taken on the line 33.

Figure 7 is a fragmentary detail view showing in horizontal section the adjustable louvers and the operating means therefore the section being taken on the line l-'I of the Figure 2;

Figure 8 is a fragmentary view showing in elevation a portion of the end wall of the casing structure and the lever for operating a damper disposed within the enclosing casing; and I Figure 9 is an exploded view showing in transverse section the detail construction of the enclosing casing structure and the manner in which the cover of the casing may be quickly removed and replaced to facilitate assembly and repair, the section being taken on the line 9-9 of Figure 2.

Referring now-in detail to the accompanying drawings, the reference numeral l0 indicates a window ventilator in its entirety which, as shown, may be removably supported in position to receive outside air through an opening ll defined by a lower sash rail l2'of a window, a window sill l3 and the sides M of the window casing (see Figs. 1, 2, and 3) The ventilator rests at its rear on the window sill l3 and is provided on its bottom with a pair of parallel transversely extending supporting strips l5 which are in turn supported from their outer ends by diagonal brackets IS, the latter being secured at their lower ends within socket members ll fixed to the side wall 18 of the room beneath the window sill.

The spaces between the ends of the ventilator l l0 and the sides of' the window casing may be filled by suitable'blocks 19. A strip 20 of felt, rubber or similar material may be disposed between the bottom of the ventilator and the window sill, and a second strip 2| of similar material may be'secured to the upper rear longitudinal edge of the ventilator for engagingthe lower sash rail l2. The purpose of the

felt strips

20 and 2| and the filler blocks I9 is to prevent the entrance into the room of outside street noises and the like, and, as will presently appear, to permit the entrance of only clean fresh air into the room.

The ventilator l0 includes an enclosing casing structure '22 and the latter comprises a rear or back wall 23, a bottom wall 24, a front wall 25, a top wall 26, and

end walls

21 and 28.

The rear wall 23 is provided with an air inlet 29 extending for the full length and heighth of the casing and communicating through the window opening I l with the outside atmosphere. A filter 30 is removably secured within vertical guides 3| fixed to and forming a part of the rear wall 23.

The filter is arranged immediately behind and assuring that the outside air entering the ventilator will be thoroughly cleaned. A plurality of fixed louvers 32 extend lengthwise of the air inlet 29 and serve to prevent rain, snow and the like from entering the ventilator. The louvers 32 are in the form of plates disposed diagonally downwardly as shown, to provide upwardly inclined air passages 33 for the entering air. Flanges 34 are provided on the ends of the louvers 32 for securing them to the ends of the rear wall 23.

The bottom wall 24 is provided with a pair of parallel and spaced positioning members 35 and 36 extending for the full length of the casing, the member 35 being angle shaped in cross section, with the upstanding flanges 31 thereof arranged toward the rear of the casing, and the member 36 being channel-shaped in cross section. and having .an upstanding flange 38 parallel to and spaced from the flange 31 (see Fig 9). The members 35 and 36 may be securely fixed to the bottom wall by any suitable means, such for example, as spot welding. The bottom wall 24 is provided on the front and ends thereof with an upstanding flange 39. The lower edges of the front wall 25 and the end walls 2'! and 28 fit on the inside of the flange 39, as shown in Figs. 3 and 5. The positioning members 35 and 36 and the flange 39 also function to stiifen the bottom wall 24.

The front wall 25 is provided with an air outlet 40 which extends for substantially the entire length of the casing and is divided in the middle into a pair of openings 4| and 42 by a narrow vertical member 43 formed as part of the front wall 25 and lying flush with the remaining portions of the front wall. A plurality of adjustable louvers 44 are arranged within each of the openings 4| and 42 and are pivotally mounted to turn on horizontal axes. The louvers serve to direct the outgoing air either upwardly and forwardly of the casing, downwardly and forwardly of the casing, or to close the openings 4| and 42. Figs. 2, 3 and 9 show the position of the louvers when in closed position. Fig. 6 shows in full lines the position of the louvers for directing the air upwardly and forwardly and in dotted lines the position of the louvers for directing the air downwardly and forwardly.

An operating lever 45 serves to move all of the louvers 44 in unison to either of the three positions just explained. The openings 4| and 42 are defined respectively by inturned

flanges

46 and 41 of the front wall. The louvers 44 are pivotally mounted at their ends adjacent the end.

walls

21 and 28 by pins 48 (see Fig. 2), which pins extend through the ends of their respective louvers at the centers thereof and through openings in the

flanges

46 and 41. The louvers are pivotally mounted at their ends adjacent the vertical member 43 by pins 49 extending through the ends of the louvers at their respective centers and through aligned openings in the

flanges

46 and 41. The pins 46 are relatively short and are secured in place by riveting after the louvers 44 are in place. The pins 49 are relatively long and each of these pins extends across the vertical member 43 at the rear thereof and serves as a pivot for corresponding or adjacent louvers in the openiings 4| and 42. I

Each of the louvers 44 at the end thereof adjacent the vertical center member 43 is provided with a flange 50 extending rearwardly and inwardly of the casing, and the flanges 56 of all of the louvers are connected together by vertical links 5| and cross pins 52 for operation in 2,081,103 across the full length of the inlet 29, thereby unison. The two center louvers in the opening 4| are connected across to the corresponding center louvers in the opening 42 by the pins 52 extending through aligned openings in the flanges 56, and each link 5 connects together all of the louvers 44 of each opening. Each link 5| is connected at its opposite ends to the flanges 50 of the top and bottom louvers of one of the openings and is connected intermediate its ends 'cross pin 52 by a slot 53 formed in the end of the lever and receiving the pin 52. Thus, the

' louvers 44 may be moved in unison to either of the three positions by grasping the knurled outer end 54 of the lever and moving it up or down, as

desired.

The top wall 26 is provided with an air outlet 66 which extends for substantially the full length of the casing and is divided in the center by a transversely extending narrow strip 6| to form two

openings

62 and 63. A single louver 64 is mounted in each of the

openings

62 and 63, and each louver is mounted in its respective opening to swing about a pivot located adjacent its forward longitudinal edge. The pivotal mounting for each louver 64 is effected by pins 65 extending through aligned'openings in the ends of the louver and in flanges 66 depending from the top wall at the ends of each of the

openings

62 and 63. The louvers 64 may be moved up to the dotted line position shown in Fig. 3 or they may be closed, as desired, by grasping an upstanding knob 61 fixed to the upper side of each of the louvers. When the louvers 64 are opened to the dotted line position, the air is directed upwardly and rearwardly and against the window and thereby diffused upwardly into' the room. The louvers 64 are prevented-from being moved past their full open and full closed positions by pins 68 extending from the flanges 66 and adapted to engage either of two space abutments 69 and 16 formed on flanges II depending from each end of each of the louvers.

The rear longitudinal edge of the top wall 26 defines with the top of the rear wall 23, an opening 12' extending lengthwise of the casing and through which the filter 36 may be inserted and removed. A removable cover plate 13 covers this opening and the upper surface thereof lies flush with the upper surface of the top wall 26. An angle 14 extends longitudinally of the casing adjacent the upper ends of the vertical guides 3| for the filter, and is fixed to the guides. An upper horizontal flange 15 of the angle 14 serves as a ledge upon which the rear edge of the top wall may rest and be secured.

The

end walls

21 and 28 of the casing may be formed from the same strip of metal as the front wall, and the end walls extend rearwardly and overlap the portion of the rear wall forming the guides for the filter, as indicated at 16. The top wall 26 may be formed as a separate piece and provided with a downwardly extending flange 11 along its front and end edges, which flange overlaps and is fixedly secured to the

upper edges

21 and 28 and top wall 26 being secured together to form a removable cover piece. The cover piece is removably secured in place on the bottom and rear walls by removable screws 18 extending through the upturned flange 39 of the bottom wall 33 and through the front wall,

and through the rear edge of the top wall and the flange 15 of the angle 14 fixed to the rear wall.

The casing is divided longitudinally by an upright partition 88 into a rear inlet chamber 8| communicating through the passages or interstices of the filter 38 and the inlet 29 with the atmosphere, and a front outlet chamber 82 communicating through the front wall outlet 48 and top wall outlet 68 with the room. The partition 88 comprises a lower vertical portion 83 spaced from and parallel to the front wall 25, an intermediate diagonal portion 84 sloping upwardly and rearwardly from the top of the lower portion 83, and an upper deflecting portion 85 curved upwardly and forwardly from the top of the in-. termediate portion 84 to the top wall 26 of the casing (see Figs. 3, 4, and 5).

The intermediate diagonal portion 84 is provided with a. pair of openings 86 and 81 which are disposed symmetrically at opposite sides of a transverse median plane through the casing, and the openings 86 and 81 provide communication between the rear inlet chamber 8| and the front outlet chamber 82. A pair of

centrifugal blower housings

88 and 89 are arranged in the inlet chamber 8| with their outlets communicating with the openings 86 and 81 respectively. Each of the blower housings is provided at opposite sides thereof with inlets 98 communicating with the inlet chamber 8| and arranged in planes extending transversely of the casing and parallel to one another.

The upper portions of the blower housings are fixed to the intermediate portion of the partition by any suitable means, such, for example, as riveting or spot welding. The lower portions of each of the housings are secured by connecting strips or plates 9| and 92 to a channel-shaped supporting member 93 extending longitudinally of the bottom wall 24 of the casing. The plates 9| are suitably secured by spot welding at their lower ends to an upstanding flange 94 of the supporting member 93 and at their upper ends are riveted to the rear side of the

blower housings

88 and 89. The plates 92 are spot welded at their lower ends to a second upstanding flange 95 of positioned on the bottom wall 28 'by the flanges 31 and 38 of the members and 36 respectively, and the member 93 is removably secured at each end thereof to the bottom wall 28 by bolts 96 and wing nuts 91 (see Fig. 5). The bolts '96 extend upwardly through aligned openings provided respectively in the bottom wall 28, in the base of the member 93 and in transverse pieces 98 dissposed across and securely fixed to the member 93 at each end thereof. The wing nuts 91 are threaded to the upper ends of the bolts, as shown.

An electric motor I88 is disposed between the

blower housings

88 and 89 and is supported by a member I8I having depending flanges I82 at the ends thereof which are fixedly secured to the supporting member 93. The motor I 88 is secured to the member IN by a U-shaped brack et I83 having arms I84 secured at their upper ends to the ends of the motor housing and having a lower portion I85 suitably secured to the .the motor andthrough the inlet openings 98 of the

blower housings

88 and 89, respectively. A pair of centrifugal blower elements I88 are disposed within the

housings

88 and 89, respectively, and are fixed to the outer ends of the motor shaft I81.

In operation, the motor driven centrifugal blower elements I88 provide for the flow of air from the inlet chamber 8| through the openings 86 and 81 in the partition 88 into the outlet chamber 82, and through either or both of the

outlets

48 and 68 into the room.

The speed of the motor may be regulated by a rheostat II8 disposed within a housing I arranged at the forward side of the vertical portion 83 of the partition 88. A control shaft 2 for the rheostat extends through the housing I II and the front wall 25 of the"casing and a. knurled Any suitable means may be used for securing together the housing I I I, lower end of the vertical portion 83 and flange 95; for example, they may be secured together by riveting or spot welding.

From the above description, it will be seen that the partition 88, the

blower housings

88 and 89,

the rheostat H8 and housing I "therefor, and the motor I88 are all securely fastened to the supporting member 93 and that the latter is removably secured to the bottom wall of the casing by the bolts 96 and wing nuts 91. These elements form an assembled unit and as such may readily be installed in and removed from the casing. The decided utility of this construction in facilitating assembly and repair of the ventilator will be readily appreciated.

A damper 5 extends longitudinally of the casing in. the outlet chamber 82 and is fixedly secured along its upper longitudinal edge to a shaft 6 journaled in the

end walls

21 and 28,

cured thereto an operating lever.| I1 (see Figs. 3,

5, 8, and 9). By moving the lever II1, the damper I I5 may be moved to the dotted line"position shown in Fig. 3 to close off the space between the forward edge of the curved deflecting portion 85 of the partition and the lower edge of the diagonal portion 84 and thereby prevent the passage of air through the casing, or the damper 5 may occupy the position shown in full lines and thereby form a defining wall element of an air passage through the casing. When the damper is in open position, the lower edge thereof is spaced from the front wall 25 so that air may flow around the lower edge of the damper and upwardly and out of the

openings

62 and 63 in the top wall, when the louvers 64 are open.

, The inlet and outlet chambers 8| and 82 and

blower housings

88 and 89 provide a passage through the casing for fresh air. A portion ||8 of this passage is defined by the upper surface of the intermediate diagonal portion 84 of the partition 88 and by the bottom surface of the deflecting portion 85 and by the rear surface of interior surface of this portion of the'passage, as well as all interior surfaces of the inlet chamber, are provided with a lining of sound deadening or absorbing material N9 of any suitable kind; for example, acoustic felt.

As stated, one purpose of the damper H5 is to close the air passage through the casing and thereby prevent the fiow of air therethrough when the device is not in use. The closing of the passage is made more effective by the presence of the relatively soft sound deadening material I IS on the engaging surfaces of the damper and intermediate portion 84 of the partition. If desired, portions of the inletchamber 8| may also be provided with a lining of sound deadening material I20 to prevent the passage of motor and blower noises through the casing Walls.

On account of the diagonal arrangement of the intermediate portion 84 of the partition and the forwardly curved surface of the upper portion 85, and the arrangement of the openings 88 and 81 and the

blower housings

88 and 89, a relatively large amount of air per unit of time can be circulated through a casing of a given cross sectional dimension and length. The forwardly curved portion 85 and the damper I IS, in conjunction with the upper surface of the diagonal portion 84 and the forward surface of the vertical portion 83, provide a tortuous air passage which aids in effectively absorbing sound. As! this tortuous air passage is as wide as the casing structure is long and as the passage is curved in vertical planes, the maximum air capacity for a given size of casing is made possible and at the same time air is ejected from the

outlets

48 and 88 at substantially the same velocity and pressure throughout their length. I

The louvers 44 in the inlet 40 provide for directing the air to different portions of the room forwardly of the casing. In case the movement of air into the room through the louvers 44 in either of the directions provided for should be uncomfortable to the occupants of the room due to the creation of drafts, the louvers 44 may be closed and the louvers 64 in the top wall outlet 60 opened. The air will then fiow around the.

end of the damper H5 and between the latter and the front wall of the casing and upwardly through the outlet 60. As the louvers 64 in their open position are inclined rearwardly, the air leaving the casing through the outlet 68 will be directed upwardly and rearwardly and against the window pane and side wall of the room, from whence it will be distributed throughout the tition 80, blower housings B8 and 89, rheostat housing Ill and rheostat Hill, and motor I with its shaft I01 carrying the blower elements I08, all firmly secured to the supporting member 93. The second unit may be readily removed from the casing as previously explained. The third of these units is the cover consisting of the front wall 25, top wall 26 and end

walls

21 and 28 with the shaft H6 and damper H assembled therein. The cover is detachably secured to the unit first referred to in a manner already described.

It is to be understood that, while we have 11- lustrated our invention as being embodied in a ventilator adapted to be installed in a window, our invention in all of its aspects is not so limited. In so far as certain of the broader aspects of our invention are concerned the novel features may be embodied in a number of different devices; for example, the features of the invention may be embodied in devices for recirculating air in a room, or for introducing outside air into the room through openings other than those provided by a partially opened window.

' What we claim and desire to secure by Letters Patent of the United States is:

= 1. An air circulating device comprising a casing structure including an upright front wall having an air outlet extending for substantially the entire width thereof; means in said casing defining an air passage communicating with the outlet and extending through the casing in a direction toward the front wall and being of substantially the same width as the front wall outlet opening; said passage-defining means including spaced upper and lower wall elements extending for the full width of the passage, and the upper wall element being inclined downwardly and forwardly toward the air outlet in the front wall for directing the air toward said outlet; the upper wall element being pivotally mounted at its upper end to move about a horizontal axis extending substantially parallel to the plane of the front wall; means for moving wise of the casing to communicate with a room;

an upright partition dividing the casing longitudinally into a rear inlet chamber communicating with the inlet and a front outlet chamber communicating with the outlet; said chambers extending for substantially the entire length of the casing; the partition including an upright lower portion spaced from the front of the casing and extending in the same general direction as said front portion, a diagonal intermediate portion extending backwardly and rearwardly from the top of the upright lower portion, and a top portion extending upwardly and forwardly from the top of the diagonal portion and defining with the diagonal portion an air passage extending for substantially the same length of the casing as the air outlet and communicating with the latter; said diagonal portion having an opening therein providing communication between the inlet and outlet chambers; and blower means arranged to discharge air upwardly through said opening in the diagonal portion and toward said top portion.

3. An air circulating device for a room comprising a casing including a front wall having an air outlet extending for substantially the full length thereof, a top wall having an air outlet portion having an air outlet extending lengthand a rear wall having an air inlet extending for substantially the full length thereof; adjustable louver means in, the front wall air outlet operable in one position to direct air into a desired portion of a room and operable in an- -other position to close the front wall outlet;

means in the casing defining an air passage communicating at one end with the air inlet and at the other end with the air outlets and including a movable top wall element operable in one position to form a part of the passage and in another position to close said passage; said element when in open position being inclined forwardly and downwardly from the upper part of the casing and the lower end thereof being spaced from the front wall a distance sufficient to permit the air to pass around the end of the element and upwardly through the top wall outlet when the front wall louvers are in their closed'position.

4. An air circulating device for a 'room comprising an elongated casing having an air inlet in the rear thereof and an air outlet in the front portion thereof; partition means dividing the casing longitudinally into a rear inlet chamber and a front outlet chamber; said means including a downwardly and forwardly extending diagonal portion and a deflecting portion extending upwardly and forwardly from the upper end of the diagonal portion and defining with said diagonal portion a forwardly extending air passage communicating at its forward end with said air outlet in the casing; the diagonal portion having at least one opening therein providing communication between the inlet and outlet chambers; and means providing for the flow of air from the inlet chamber upwardly through the opening in the diagonal portion and directly against the deflecting portion whereby the air entering the outlet chamber is caused to flow forwardly toward the air outlet in the front of the casing.

5. An air circulating device for a room comprising an elongated casing having an inlet opening in' the rear portion thereof and an outlet opening in the front thereof; partition means dividing the casing longitudinally into a rear inlet chamber and a front outlet chamber; said means including a downwardly and forwardly extending diagonal portion, and a deflecting portion extending upwardly and forwardly from the upper end of the diagonal portion; said diagonal portion having -at least one opening therein providing communication between the inlet and outlet chambers; a deflecting member extending forwardly and downwardly from the forward end of the deflecting portion of the partition and defining with said deflecting portion and the diagonal portion 'an air passage in the outlet chamber extending forwardly and downwardly;

and means providing for the flow of air from the inlet chamber upwardly through the opening in the diagonal portion.

6. An air circulating device for a room comprising an elongated casing having an air inlet in the rear portion thereof and an airoutlet in the front thereof; partition means dividing the casing longitudinally into a rear inlet chamber and a front outlet chamber; said means including a downwardly and forwardly extending diagonal portion, and a deflecting portion extending upwardly and forwardly from the upper end of the diagonal portion; said diagonal portion having at least one opening therein providing communication between the inlet and outlet chambers; a deflecting member extending forwardly and downwardly from the forward end of the deflecting portion of the partition and defining with said deflecting portion and the diagonal portion an air passage in the outlet chamber extending forwardly and downwardly; said deflecting member being pivoted at its upper endvwhereby it may be moved downwardly toward the diagonal portion and close the air passage.

7. An air circulating device for a room com- K prising an elongated casing; an upwardly extending partition dividing the casing into a rear inlet chamber and a front outlet chamber; said partition comprising an intermediate diagonal portion extending downwardly and forwardly and having an opening therein providing communication between the inlet and outlet chambers, and an upper deflecting portion extending forwardly and upwardly from the upper end of the diagonal portion and defining with said diagonal portion aforwardly extending air passage; and a blower arranged to provide for the flow of air upwardly and forwardly through the opening in the diagonal portion and directly against the deflecting portion 8. An air circulating device for a room comprising an elongated casing having an air inlet in the rear and an air outlet in the front thereof; means defining a passage through said casing connecting the inlet and the outlet and in-: cluding .a plate-like element extending lengthwise of the casing and arranged diagonally so as to provide an upper surface sloping forwardly and downwardly toward the air outlet, and an air deflecting member extending lengthwise of the casing and directly above the plate-like element and having its lower surface extending forwardly and upwardly from said plate-like element and defining with the upper surface of the plate-like element a forwardly extending part of the passage; theplate-like element having an air opening therein; and means providing for the flow of air upwardly through the last-named opening and directly against said air deflecting member.

9. An air circulating device comprising a casing having an air inlet and .an air outlet and including a bottom wall, a back wall portion, a front wall, a top wall and end walls; the bottom wall and back wall portions being secured together to form a unit and the. front, top, and

end walls being secured together to form a cov- 10. An air circulating device for a room comprising an elongated casing having an air inlet.

in one side thereof and an air outlet in the other side thereof; an upwardly extending partitiondividing the casing into a rear inlet chamber and a front outlet chamber communicating respectively with said inlet-and said outlet; said partition including a diagonal portion extending downwardly-r and forwardly towairds said outlet opening and having an opening therein providing communication between the inlet and outlet chambers; and deflecting means .in

- said outlet chamber and arranged above said diagonal portion and extending downwardly and forwardly towards said outlet opening and defining with said diagonal portion a forwardly and downwardly extending air passage; and means providing for the flow of air from said inlet chamber upwardly through said opening in the partition and against said deflecting means whereby the air is deflected downwardly and forwardly by said deflecting means and toward said air outlet.

11. A window ventilator unit adapted to be mounted over a window sill, and comprising an elongated casing including a rear wall having an air inlet substantially coextensive therewith, a front wall having an air outlet extending for substantially the entire length thereof; air impelling means arranged within said casing and comprising a pair of blowers arranged within said casing adjacent said air inlet and symmetrically disposed with respect to a transverse median plane passing through. the casing; a partition extending lengthwise of the casing and dividing the latter into an inlet chamber extending for the full length thereof and housing said air impelling means, and into an air outlet chamber extending for the full length of saidcasing and communicating directly with said air outlet; said partition rising from said bottom wall at points adjacent the forward side of said air impelling means and overlying said impelling means; the overlying portion of said partition having a pair of upwardly-directed symmetrically disposed openings therein respectively connected to the discharges of said blowers; and air deflecting and sound deadening means arranged directly above said overlying portion of the partition and defining with said overlying portion a forwardly extending air passage for conducting the air flowing upwardly through said partition openings forwardly toward said outlet opening.

12. A window ventilator unit adapted to be mounted over a window sill, and comprising an elongated casing including bottom, top, front,

rear and end walls; said rear wall having an air inlet and said front wall having an air outlet; air impelling means in said casing; a partition extending lengthwise of the casing and forming an inlet chamber receiving air from said inlet and enclosing said air impelling means and forming an outlet chamber communicating with said outlet; said partition rising from said bottom wall and overlying said impelling means; the overlying portion of said partition having an upwardly directed opening for passage of air from said impelling means; and air ,deflecting means arranged above said overlying portion and defining with said overlying portion a forwardly extending air passage terminating at its forward end at points adjacent said outlet opening for conducting air delivered from said partition opening forwardly towards said outlet. 1

13. A window ventilator for a room adapted to be arranged adjacent a window opening for said room and comprising a permanently mounted part adapted to be supported upon the sill of said window and having air sealing connections between the sides thereof and the frame of said window and between the top thereof and the sash of said window; a cover part detachably secured to said permanently mounted part; and a blower-partition umt detachably secured to said permanently mounted part and adapted to be readily removed upon removal of said cover part; said partition-blower unit including a supporting member detachably secured to said permanently mounted part, a partition member fixed to said supporting part and extending longitudinally of the casing and dividing the latter into a rear inlet chamber communicating with the outside atmosphere through an opening in the permanently mounted part and into. a front outlet chamber communicating with the room through an opening in the cover part, and a motor-driven blower fixed to said supporting member and to said partition and arranged to discharge air from said inlet chamber through an opening in said partition and into said outlet chamber.

14. In an air circulating device, a casing comprising a base part adapted to be permanently mounted adjacent a roomwindow and a cover an opening therein adapted to communicate with the room and including a front wall and a top wall portion fixedly secured together; end walls for said casing secured to one of said parts;

and a partition-blower unit arranged within said casing and adapted to be readily removed upon removal of said cover part, and comprising a supporting member detachably secured to the bottom wall of said base part, a partition member fixed to said supporting member and having an opening therein and dividing the casing longitudinally into front and rear air chambers communicating respectively with said openings in the casing, and a motor-blower unit fixed to said supporting member and arranged to provide for the flow of air from one of said air chambers through the opening in the partition and through said other air chamber.

15. Ventilating apparatus comprising wall means defining an enclosing casing structure having an inlet opening in one side thereof and an outlet opening in another side thereof; motordriven blower means arranged adjacent the inlet opening and having an inlet communicating therewith and having a discharge communicating with the outlet opening; means defining a continuous air passage having an upstream end connected to the discharge of said blower and having a downstream end positioned to discharge air toward said outlet opening in the casing said means comprising spaced wall parts; one of said wall parts being stationary and forming one side of the air passage and having an opening to which the discharge of the blower is directly connected, the other of said wall parts forming the side of the passage opposite tothat formed by the first-named wall part and comprising a stationary element arranged adjacent the opening in the first-named part and a movable element arranged at the downstream side of the stationary part and being pivotally supported at its upstream edge at points directly adjacent the downstream edge of the stationary element; and means for moving said movable element about its pivotal connection so that in one position the movable element extends across said passage and the downstream edge thereof engages the first-named wall part and prevents flow of air through the passage and blower and so that in another position the movable element is arranged in opposed spaced relation with respect to the first-named wall part and defines therewith a portion of said air passage.

16. Ventilating apparatus comprising wall means defining an enclosing casing structure having an inlet opening in one side thereof and an outlet opening in another side thereof; motordriven blower means arranged adjacent/the inlet opening and having an inlet communicating therewith and having a discharge communicating with the outlet opening; means defining a continuous and tortuous sound-deadening air passage having an upstream end connected to the discharge of the blower and' having a downstream end arranged to discharge air toward said outlet opening; said means comprising spaced wall parts; one of said wall parts extending inthe general direction of said outlet opening in the casing and having an opening therethrough at the upstream portion thereof directly connected to the discharge of said blower; the other of said wall parts being connected at its upstream edge to the upstream edge of said firstnamed part and extending first away from the latter and then in a downstream direction so as to deflect the air discharged from said opening and direct such air toward said outlet opening in the casing structure; said other wall part comprising a stationary element connected at its upstream edge to the upstream edge of the firstnamed wall part, and a movable damper element arranged at the downstream side of said stationary element and being pivotally supported at its upstream edge at points directly adjacent the downstream edge of said stationary element; and means for moving said movable element about its pivotal connection so that in one position said movable element extends across said passage and the downstream edge thereof engages the first-named wall part and thereby prevents flow of air through said passage and blower and so that in another position themovable element phere; a front wall having an outlet opening therein extending for substantially the full length thereof and adapted to communicate directly with the room'space; a top wall; end walls joining the rear, front and top walls and providing therewith a casing structure; a partition arranged in said casing and extending from end wall to end wall thereof and from bottom wall to top wall thereof and dividing the interior of said casing into a rear inlet chamber communicating directly with the air inlet opening and a front outlet chamber connected directly with the air outlet opening; said partition having an opening therethrough connecting said chambers; a motor-driven blower unit arranged in said inlet chamber. and operable to discharge air from the inlet chamber through said opening in the partition into the outlet chamber; and means in the outlet chamber defining a continuous air passage having an upstream end communicating directly with the opening in the partition, and a downstream end positioned to discharge air through the outlet opening in the front wall; said means including a movable wall element pivotally supported along its upstream edge and operable in one position to extend across said passage and engage the other side thereof so as to close entirely said passage and prevent flow of air through the opening in said partition, and operable-in anotherposition to function as a part of the defining wall structure of saidpassage.

HENRY S. WOODRUFF.

PAUL T. ENGELSKIRCHEN, JR.