US2735352A - Demuth - Google Patents

Description

Feb. 21, 1956 c. DEMUT H 2,735,352

AIR QIS CHARGING AND DISTRIBUTING MEANS Filed on. 16, 1952 2 Sheets-Sheet 1 E EEEE W INVENTOR. CHA E4. E5 DEMurH.

14 TTO/F/VEKF.

Feb. 21, 1956 c. DEMUTH 2,735,352

QIR DISCHARGING AND DISTRIBUTING MEANS Filed Oct. 16, 1952 2 Sheets-Sheet 2 INVENTOR. CHARLES Dene/TH,

2,735,352 AIR DISCHARGING AND DISTRIBUTING MEANS Charles Demuth, Mineola, N. Y., assignor to Charles Demuth & Sons, Inc., Mineola, N. Y., a corporation of New York Application October 16, 1952, Serial No. 315,165 2 Claims. (Cl. 98-40) This invention relates to means for discharging and dis tributing air, and is particularly adapted, among other possible uses, for distributors which take off air from a running air duct which supplies air to a plurality of such distributors for air-conditioning purposes. Devices in accordance with the invention are adapted to be mounted in or upon the ceiling or walls of rooms in which the air is to be conditioned.

According to the invention, a plurality of rectangular louver elements of progressively increasing size are so mounted that the larger ones respectively surround the smaller ones in spaced relation, and the larger one in turn being surrounded by a frame structure which is also shaped to form an additional louver element. The assembly of louver elements is supported and held together by fiat sheet metal strips mounted on edge and extending from and secured together at the center of the assembly and pass diagonally through the corners of the rectangular louvers and to the corners of the frame. These diagonal strips in addition to their function as ribs to hold the louvers in assembled spaced relation laterally and vertically also serve as vanes to aid the air distribution. The whole assembly is supported by a single bolt passing through the center of said assembly up to a supporting spider to support the louver assembly, the diagonal strips at the same time engaging in the corners of the frame to hold the same securely against the wall or ceiling. The principal surface areas of all of the parts are made fiat and straight in such a way as to present a pleasing appearance without resorting to the trouble and expense of forming and properly positioning any curved areas.

The invention provides a novel construction which is quite simple and inexpensive to manufacture, can be installed easily and quickly, and which is exceptionally durable, dependable and attractive in use.

The invention consists in the novel combination of features and arrangement of parts embodied by way of example, in the structure hereinafter described, as illustrating the presently preferred form of the invention.

Referring more particularly to the drawings Fig. 1 is a vertical sectional view taken through the mid portion of the device as supported at the ceiling of a room beneath a running air duct;

Fig. 2 is a plan view, partly broken away, the device as viewed from above;

Fig. 3 is a perspective view of the louver assembly separate from the frame and as viewed from above;

Fig. 4 is a view similar to Fig. 3 but showing the louver assembly as viewed from below; and

Fig. 5 is a perspective view showing a preferred way in which the pieces forming the louvers may preferably be secured together.

Referring now in further detail to Figs. 1 and 2, por tions of a running air duct are indicated at positioned above the ceiling 11 of a room through which an opening 12 is formed for receiving the device. The main portions of the device comprise a rectangular frame 13, a

showing I United States Patentb 1C 2,735,352 Patented Feb. 21, 6

louver assembly indicated generally at 14 (and in Fig. 3) a supporting screw or bolt 15 and a spider-like supporting device indicated generally at 16.

The spider-like device 16 may comprise simply a pair of sheet metal strips as at 17, 18 formed midway of their lengths respectively with oppositely directed arcuate portions 1?, 2t? welded together to form a small cylindrical opening into which the supporting bolt 15 passes. A threaded nut or the like 21 is welded or otherwise secured in place in this opening for a-djustably receiving the threaded bolt 15. It will be noted that this spiderlike device provides four leg portions adapted respectively to extend diagonally from above the center of the as sembly out to points above the four corners thereof, the outer ends of these leg portions resting on the bottom inside surface of the running air duct.

In installing the spider-like device in place (before the screw 15 is inserted) it may readily be passed up through the ceiling opening 12 while positioned along a vertical plane passing diagonally across the opening and then it may be placed in a horizontal position as shown in Fig. 1 ready to receive the screw 15 and attached louver assembly.

The frame 13 preferably comprises rectangular face portion 23 surrounded by an upturned flange portion 24 engaging at its upper edge the surface of the ceiling (or of a wall in case the distributor is mounted in a wall instead of the ceiling). The face portion 23 in turn surrounds a louver-like surface portion 25 which is bent into a plane extending at an angle inwardly and upwardly of about 45, this portion being integral with vertical neck portion 26 extending further up into the opening 12 in the ceiling and into the opening 27 in the duct.

The four sides of the frame 13 respectively may be formed of sheet metal bent to the cross-section indicated in Fig. l and such side portions may be rigidly secured together at each corner by fiat tab-like portions of sheet metal as at 30 (Fig. 2), spot welded in place, and by angular pieces of sheet metal as at 31 also spot welded in place on the four corners of the vertical areas 26 of the frame.

The louver assembly 14 of the particular form shown comprises three louvers 32, 33, 34, which are square although it will be apparent that other rectangular forms may be adopted if desired, and also additional louvers may be provided. The innermost of these louvers 32 conforms to the shape of a truncated pyramid and has a central opening for the screw 15. The other two louvers 33 and 34 each comprises four sheet metal strips each bent longitudinally as shown in section in Fig. 1 to provide areas as at 35 bent downwardly and outwardly at an angle, for example, of 45, and also vertical areas as at 36. As indicated in Fig. 5, the four side pieces of each of the louvers 33 and 34 may be secured together at their corners by providing on the vertical areas 36 tab-like extensions as at 37 bent over at right angles and welded to the other side portion at the same corner.

In order to maintain the proper spacing of the louvers 32, 33 and 34 and to lend a high degree of rigidity thereto, as well as to support the same from the screw 15, four diagonal sheet metal strips are provided at 40, 41, 42, 43 as most clearly shown in Fig. 4. The inner ends of these strips are positioned under a washer 44 (Fig. 1) on the bolt 15 so that the bolt firmly supports the louver assembly by way of engaging with the inner ends of these strips. From Fig. 4 it will be noted that the strips 40-43 extend through the corners of the louvers in between the adjacent ends of the angularly positioned areas 35 thereof. As best shown in Fig. 3, each of the lower surface areas 35 at both end edges thereof is formed with tab-like extensions 45, welded to the vertical side surfaces of the diagonal strips 40-43, thereby providing in a simple inexpensive way a strong and very rigid structure such that even if any of the louver portions are struck with strong blows, they will be firmly held against bending by the conjoint action of the diagonal strips and by reason of the angular cross-section of each louver element. Furthermore, since the diagonal strips are positioned vertically on edge and are in effect reinforced by being welded at numerous points to the louver elements, they provide a very rigid supporting means not only for the louver assembly itself but also their outer ends are adapted to engage and firmly support the four corners of the frame 13. That is, as shown in Figs, 3 and 4, each of the diagonal strips 40-43 has its outer end cut off at an angle as at 47, so as to engage in the corner portions of the frame where the angular frame surfaces 25 come together at each corner.

In installing the assembly after the spider member is put in place as above explained, the frame 13 is put in place as shown in Fig. l, whereupon the louver assembly 14 with the bolt 15 is put in place and the bolt is then screwed up into the nut 21 whereby the louver assembly is drawn firmly up into engagement with the four corners of the frame, and thus the frame as well as all of the other parts of the device are securely held in place by a single bolt or screw.

It is to be understood that when the duct 10 is disposed exteriorly of the ceiling 11 (or of a wall) the frame 13 will be held in direct engagement with the outer face of the duct 10.

Having thus described my invention with particularity with reference to a presently preferred form of the same, it will be obvious to those skilled in the art after understanding the invention, that various changes and modifications may be made therein without departing from the scope of the invention, and it ismy intention to cover in the appended claims such changes as come Within the scope of the invention.

What i claim is:

1. A louver assembly having a plurality of rectangularly shaped open ended hollow louvers of progressively larger outlines and so positioned that those of larger outline respectively surround the smaller ones withspacings therebetween, said rectangularly shaped louvers each comprising outwardly flaring side wall portions and vertical side wall portions, flat sheet metal ribs mounted on edge and extending from the central zone of the assembly diagonally outwardly through the flaring side wall portions of said louvers and secured thereto, and means disposed at said central Zone secured to the inner ends of said ribs and provided with a central opening for receiving a supporting member, the outer ends of said ribs extending, outwardly beyond the corners of the outermost rectangular louver and providing engageable portions for supporting a surrounding frame.

2. A louver assembly having a plurality of rectangularly shaped open ended hollow louvers of progressively larger outlines and so positioned that those of larger out line respectively surround the smaller ones with spacings therebetween, flat sheet metal strips mounted on edge to extend from the center of the assembly respectively diagonally through the corners of the rectangular louvers for retaining same in position the outer ends of said. ribs extending outwardly beyond the corners of the outermost rectangular louver and providing cngageable portions for supporting a surrounding frame, and a single supporting means at the center of the assembly adapted to pass up to supporting means above, for supporting the entire louver assembly.

References Cited in the file of this patent UNITED STATES PATENTS 2,017,728 Oskamp Oct. 15, 1935 2,106,458 Kurth Jan. 25, 1938 2,240,617 Harrigan May 6, 1941 2,365,867 Dauphinee Dec. 26, 1944 2,367,104 Demuth Jan. 9, 1945 2,519,503 Rigaumont Aug. 22, 1950 2,564,334 Kennedy Aug. 14, 1951 2,577,771 Kennedy Dec. 11, 1951 2,671,394 Kurth Mar. 9, 1954 FOREIGN PATENTS 282,974 Switzerland Sept. 1, 1952

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