US 1523268 A
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Jan. i3. i925. M2326@ J. R. MOCOLL VENTILATING SYSTEM Filed May 27, 1922 2 Sheets-Sheet l HNL IHN
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J. R. MCCOLL VENTILATING SYSTEM Filed May 27. 1922 2 Sheets-Sheet 2 www Ww ....HHHU limi Hm Patented Jan. 13, 1925.
UNITED STATES vrarrsrrr .TAY n. Macon., or DETROIT, MICHIGAN.
Application med may 27, 1922. serial No. 564,067.
To all lwhom it may concern.'
Be it known that I, JAY R. MCCOLL, a citizen of the United States, and residing at Detroit, in the county of Wayne and State 'of Michigan, have invented a new and Improved Ventilating System, of which the following is a specification.
This invention relates to means for supplying fresh air to school rooms, churches and similar places of assembly where many persons congregate, and its object is to provide a Ventilating system by means of which the air can be discharged from a series of suitable openings in the ceilings of such rooms and p so directed by proper diffusers that every portion of such rooms willireceive an adequate amount. A further object of this invention is a system of this character which shall be built into the ceiling and walls of the room in which it is installed.-
This invention consists in a Ventilating system for assembly rooms in which a concrete slab is provided with an air conduit having a number of discharge openings in its lower side, and a diffuser mounted in the conduit adjacent each opening and provided with vanes for lcausing the air issuing from the opening to spread out to substantially pyramidal form.
It also consists in adjustable deiiectors at- Y tached to the several ditfusers to control the volume of air passing through-each diifuser.
It further consists of the details of construction illustrated in Vthe accompanying drawings and particularly pointed out in the claims.
In the accompanying drawings, Fig. 1 is a vertical section of the walls, ceiling and i'loor of a room of a building provided with my improved system of ventilation. Fig. 2 is a bottom plan of a ceiling. Fig. 3 is a central longitudinal section of a portion of a ceiling air-conduit. Fig. 4 is a section on the line 4-4 of Fig. 3. Fig. 5 isa detail of the construction of a ceiling conduit. Fig. 6 is a cross section of a modified form of conduit between diifusers. Fig. 7 is a bottom plan of the frame at a diiuser opening.
Similar reference characters refer to like p partslthroughout the several views.
inforced concrete which is molded over and between parallel rows of terra-cotta tiles or sheet metal forms. the latter being used in increasing proportions.
As a rule, these shectmetal forms are usually corrugated at both tops and sides so that they are unacceptable as air conduits owing to the excessive resistance of the corrugated-surfaces to the flow of air. I therefore provide the conduits shown in the drawings, consisting of tops 1 and sides 2 which are preferably at the same angles to the top as the sides of the floor forms 3. The concrete 4 is molded over the tops and along the sides of these air conduits to constitutey the floors of the buildings, reinforcing bars of steel of any desired construction being employed. As the tops 1 of these conduits are fiat, posts or braces 6 of Hat bar steel are positioned as closely as necessary between the normal bottom,plate 7 of the conduit and the reinforcing angle 8 extending along the top thereof. The open The number of these air conduits in a ceiling and therefore the distance between them will depend upon the size of the room to be ventilated and the height of the ceiling, more conduits being required in a low room than in one with high ceilings, the latter permitting higher air pressures. At intervals along the conduits the ceiling and the bottom plates 7 of the conduits are formed with openings, bordered with the flat bars 12 and 13. If desi-red, a grate or screen 14 may be held in position by these flat bars. Or these bars 12 and 13 may be formed parts of the register.
The lower edges of the sides 2 of these air conduits, along and at each side of these openings, are turned in to constitute the flanges 15, then down to constitute the borders 16 and then ont to constitute the flanges 17, extending around three sides ofthe wood strips 18 which are ada ted to receive the screws 19 by which the ars 12 and 13 are secured. I prefer to reinforce these portions y'of the conduit walls by angle'bars 20, at-
tached to these bent portions of the walls andthe strips 1.8 by bolts 22. These angle bars are preferably longer than the openings, as indicated in Fig. 7.
The bottom plates 7 of the air conduits are preferably offset downward just as these air openings, as shown atV 23, and tit the cross strips 24 of wood, as shown in Fig. 3.
A diiluser, such as shown in Figs. 3 and 4, is mounted within the air conduit at each ceiling opening. It comprises a pla-te 26 turned down at 27 and then outward to con stitute the flange 28 (Fig. 3). One edge is formed into hooks 29 to extend through slots 30 in one edge of a delector 31 at the inlet of each diffuser. The side plates 32 of each diffuser extend from the plate 26j- 27 and I prefer to stiften the lower edges of these side plates by means of the angle bars 34, which normally rest on thebars 12. An angle bar 35 extends between the lower corners of the side plates 32 adjacent the strip 24 and rests on a bar 13.
Gaskets 37 of felt or other desirablematerial may be placed'between the edges 17 of the side walls 2 of the conduits and the angle bars 34 and between the edges 23 of the bottom plates of the conduit andthe [lange 28 on the plate 26--27 of the diffuser and the angle bar 35 respectively.
Attached to vthe angle bar 35 is a brace 38 which carries an adjusting screw which eX- tends through a nut 4l, pivoted to the bracket 40 (Fig. 4) on the deflector 31. As indicated in Fig. 1, these deiectors are placed at such angles that substantially the desired amountsv of air will pass down through the severa] diifusers.
I prefer to form the diffusera with dividing plates 42 which cause the air to issue at wider angles longitudinally of the conduits and with the Haring vanes 43 which cause the air to issue at wider angles transversely to the conduits. These dividing plates and vanes cause a very uniform flow ofai-r in all parts of the pyramids of air descending from these diliusers, that is, instead of a pyramid of air of which the middle portion moves down much more swiftly than the outer protions, a pyramid is produced wherein the flow of the-several portions is more nearly equal. The person sitting directly beneath a`diiuserwill therefore receivebut little more fresh air than the person sitting beneath a point midway betweentwo diifusers.
The air conduits in the floors may connect to main air conduits -or tunnels 45 in any desired manner, the vertical lues or ducts 46 being indicated, these being formed in a side or partition wall 47. It will beunderj stood, however, that any`other desired type of air supply may be employed` This air may be heated or cooled if desired;
The details of construction andthe pro-y portions of parts may all befcha'ngedby those skilled in the art without `departing from the spirit ot' my inventiony as set-forth in the following claims'.
Iclaim: l j r 1. In a veintillating system for rooms, a ceiling vconstruction,embodying an airgconduit having openings inits lower side,a
diffuser mounted in the lower part of the conduit at each opening and ,comprising sides, a top and an upright end, a lpartition plate extending vbetween the sides substantially parallel to the top and end, vanes extending longitudinally of and substantially within the conduit in each direction4 from that 'portion ofl the partitionplate which is parallel tothe endV cf the diffuser, and an adjustable gate mounted within the conduit adjacent each of thodiusers to determine the proportion of the air lpassing through the conduit which Vshall ypass through the adjacent diiiuser.
2. In a Ventilating system forrooms7 a ceiling construction embodying an lair confluit having openings. in lits lower side, a diffuser mounted in the lower part yof the conduit at each opening and 'comprising sides, a top and' an uprightl end, vanes extending longitudinally of and substantially within the conduit, and ran adjustable gate mounted within the conduit adjacent. each of the dilusers to determinetheproportion of the air passing vthroughythe conduit which shall pass throughithe adjacent diffuser. .i
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