US2142821A

US2142821A - Attic ventilator

Info

Publication number: US2142821A
Application number: US162725A
Authority: US
Inventors: Larson Fred Edward
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-09-07
Filing date: 1937-09-07
Publication date: 1939-01-03
Anticipated expiration: 1956-01-03

Description

Jan. 3, 1939- F; LARSON I 2,142,821

ATTIC VENTILATOR Filed. Sept. 7, 1957 Wed 27/4 4/014/1'04 Patented Jan. 3, 1939 UNITED STATES PATENT OFFliIE Claims.

This invention relates to attic ventilators.

The principal object of this invention is to provide a sheet metal attic ventilator in the form of a casing provided with flat sheet metal louvres 5 that are level or horizontally disposed and parallel to each other, and permanently secured to the, casing so as to provide a maximum area for the unobstructed flow of air through said ventilator.

Another object of the invention relates to forming the louvres of progressively increasing width arranged in a tier with the widest louvre uppermost, and to provide at the base of the ventilator casing a water receiving pan, the water collected therein draining out through suitable drainage openings provided at the front of the ventilator casing.

Numerous other objects and advantages of this invention will become more apparent as the following description proceeds, particularly when reference is had to the accompanying drawing, wherein:-

Figure 1 is a front elevational view of the attic ventilator showing a portion of a screen mounted 26 in the front opening of the ventilator.

Figure 2 is a cross-sectional view of the attic ventilator taken on line 2--2, Figure 1.

Referring to the drawing, the ventilator is generally indicated by the reference character Ill 30 and comprises a sheet metal casing ll of boxlike form having a top wall l2, bottom wall l3, and side walls I4, with a front opening l5 and a rear opening It. The casing may be fabricated of sheet metal in any desired manner and 35 may be of any suitable shape and size, and in the preferred embodiment is of rectangular box-like form as above indicated. At its front opening IS, the casing H is provided at the edges thereof with laterally extending flanges of uniform width 40 to define a frame adapted to abut the surface of the wall I8 immediately adjacent the opening l9 provided therein through which the ventilator casing II is inserted in the manner Well known, the frame ll serving as a means for 45 attaching the casing H to said wall through the medium of any suitable fastening means (not shown) such as bolts, screws or nails. In the rear opening l5, if desired, may be mounted a motor driven fan to provide a forced draft ven- 50 tilation.

The lower side of the frame extends above the bottom wall I 3 of the casing as at 20, and at the rear of the bottom wall l3 there is provided a back wall portion 2|, said bottom wall l3, frame 5 portion 20, back wall portion 2|, and side walls l4 defining a water receiving receptacle or pan 22, for a purpose to be hereinafter described. Preferably the bottom wall I3 is given a slight slope downwardly from the back wall portion 2| to the frame H, the frame portion 20 being provided with openings 23 through which water dripping into the pan 22 can drain out.

Arranged within the ventilator casing II are a plurality of louvres 24 formed of sheet metal. Each louvre extends the full width of the casing 10 H and is fixedly connected at its ends to the side walls M of the casing in any desired manner as by riveting or soldering. The louvres 24 are each formed cf a progressively increasing width with the smallest louvre 24a at the bottom, adjacent 15 the bottom sloped wall l3, and the largest louvre 2th at the top, adjacent the top wall l2, the louvres being arranged in parallel horizontal relationship, spaced equally apart and with their front edges 25 in the same vertical plane spaced 2O inwardly from the outer surface of the frame H as clearly shown in Figure 2. It will thus be seen, that starting with the lowermost louvre 24a, each succeeding higher louvre at its inside edge 26 overlaps the inside edge of the louvre direct- 25 ly beneath it. Thus in the event of rain, whatever water entering the casing I will move in wardly along the louvres 24 and drip off of the inside edges 26 into the pan 22. By virtue of the overhanging relation of the louvres 24 there is 30 no interference to the water dripping off of the inside edges 26 into the pan 22, the water collected therein quickly draining out of the slots 23 because of the inclination of the bottom wall l3. The back wall portion 2| of the pan 22 will positively prevent any water from coming into the interior of the room, attic, etc., in which the ventilator casing projects.

In order to prevent insects, dirt, etc., from entering the ventilator casing the front opening i5 is provided with a removable screen 28 suitably placed within said opening and secured therein in any desired manner, only a portion of said screen being shown within said opening. Obviously the screen 28 may be replaced with any other form of closure such as glass or metal in the event it is desired to dispense with the ventilator function.

It will be noted that the parallel horizontal relationship of the louvres 22 provides a maximum open area for the unobstructed passage of air through the ventilator, the thickness of the sheet metal louvres being negligible as compared to the total area of the opening IS. The louvres 24 being permanently fixed in the parallel horizontal relation shown can never become inoperative, thus providing a ventilator that requires no attention when once placed in position, that is fool and trouble proof and which can never get out of order. While the invention has been described in detail, it is to be clearly understood that the description is for the purposes of illustration only and is not definitive of the limits of the inventive idea. The right is reserved to make such changes in the details of construction and arrangement of parts as will fall within the purview of the attached claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A ventilator comprising a box-like casing having a front and rear opening, a plurality of flat louvres extending the full width of said casing across said front opening, arranged in parallel horizontal relationship and permanently secured to opposed end walls of said casing, the base of said casing being formed to provide a water receiving and draining pan, said louvres being each so constructed and arranged that the inner edges of said louvres will lie in a plane inclined towards said front opening so that each louvre at its inner edge overhangs the inner edge of the next lower louvre to provide an uninterrupted drop from each said inner edge to said draining pan.

2. A ventilator comprising a sheet metal boxlike casing having a front and rear opening, a plurality of flat sheet metal louvres extending the full width of said casing across said front opening, arranged in parallel horizontal relationship and permanently secured to opposed end walls of said casing, said louvres being of progressively increasing width and so arranged that the narrowest louvre is located adjacent the bottom wall of said casing and the widest louvre is located adjacent the top wall of said casing.

3. In the ventilator as set forth in claim 2,

wherein the arrangement of said louvres is such that the front edges thereof are disposed in the same vertical plane inwardly of the front opening to provide a screen or closure receiving opening, and the inside edges of said louvres lying in a plane inclined downwardly and forwardly with reference to said casing.

4. A ventilator comprising a sheet metal boxlike casing having a front and rear opening, a plurality of flat sheet metal louvres extending the full width of said casing across said front opening, arranged in parallel horizontal relationship and permanently secured to opposed end walls of said casing, said louvres being of progressively increasing width and so arranged that the narrowest louvre is located adjacent the bottom wall of said casing and the widest louvre is located adjacent the top wall of said casing, the arrangement being such that the front edges of said louvres lie in a vertical plane and with the inside edge portion of each of said louvres overhanging the inside edge portion of the louvre beneath the same, said box-like casing providing a water receiving pan at its base having a downwardly and forwardly sloping bottom whereby water impinging on said louvres will drip off of the inside edges thereof into said pan, said pan having drainage means provided at the forward wall thereof, through which said water can flow.

5. In the ventilator as set forth in claim 4, said louvre front edges being disposed inwardly of the edge of the front opening in said casing to define a screen or closure receiving opening, a frame integral with said casing surrounding the front opening therein, the lower part of said frame constituting the front wall of said pan and being formed with a plurality of openings providing said drainage means.

FRED EDWARD LARSON.