US1447776A - Air diffuser - Google Patents

Description

Malt-6, 1923. v 1,447,776. A. FRIEDMAN ET Al..

AIR DIFFUSER. Y

FILED MAY 26,1921- 5 o 9 loI l 3 1a, J1 1410- Patented ar.. 6, i923. i

Assia snrnnmam or nsw Yoann. Y., ann ARTHUR ze. KNowLns, or Urrea i. Mon'iorinrn, new JERSEY.' i i' .ein nrrsusnn.

Y Application inea nay as, i321. seriaiiro. 472,645. o

To all whom 'it may' concern.'

Be it :known that we, ABRAHAM"Flinn)-V MAN, a citizen ofthe United States, residing in the city ofl New York, in the borough and county 4vofA Queensand Sta-te of Nev York, and AR'rHU'R F. `liisovifnns,"a citizenof the United States, residing at Upper Montclair, in the county of Essex andr State of Newgilersey, have invented'a certainnew and useful Improvement. in Air Diffusers, of which the following isa 'specicationf livering air from loor ductsin Aventilating systems, and the object :of the invention `is to provide a simple, economicallyv constructed diffuser adapted to be conveniently lo cated beneath the chairv and toreceive air from a duct andwdeliverit directly to the auditorium with a minimum of friction, and so shaped that it is notlikely to.v causeV acci-` dents by being used as a yfoot-rest` by the occupant of v,theynext chair in the rear.l

lAnother important object is to provide and 'waste matter into the deliveryopenings of the diuser,` anda vfurther object `is to provide easily operated. adjusting i, means for varying the volume ofl air de-` livered through such openings,

rlhe invention consistsfin certain novel features and details of construction andarrangement by which the above objects'are attained, to be hereinafter described and claimed. Y,

The accompanying drawings form a part of this specification and show the invention as it has been carried out in practice. I i

Figure 1 is a perspective view `showing a portion of a row of theatre chairs,` with an improved diffuser in place. l

Figure 2- is a side elevation vofone of the diifusers alone, on a largerscale, and partly in vertical section. 5

Figure' 3 is an end `view of the same. Figurefl is a plan View corresponding i to Figure 2 and partly in horizontal section. `Figure 5 is a transverse sectionv taken on the line V-V in Figure 2.

Figure 6 is a vertical section corresponding to a portion of Figure 2, showing certain details `on a still larger scale.

Referring to the drawings, l is lthe floor having an opening 2 leading from a duct or air conduit, not shown, forming part of the fair supply system beneath thev floor.

The diffusers are` located at: intervals` ben eath the seats 3 and ,eachcomprises a boX- like casingor shell ofirectangular form in plan view, preferably a thin casting, open at the bottom to matchftlie lloor opening from the duct, and openat the ends to permit, the egress of air. The sides 4 of the casing are higherat the ends, and theup- Y per faces are correspondingly inclined,as

Y'showmv'to a flattened if-form, sothatkthe l K y y leasing vis flared oppositelyand the air led rlhe inventionk relates to devices for `de-v vrith little friction from the duct to the open delivery ends, while providing a s hape be used as foot-rest.

rlhe casing is secured to the floor by screws extending through holes in the flanges l13 on the sides 4:.

xiilt each open end onpeach side on the in-v terior ai'evertical grooves l"v formed vby the spaces betweenthe vertical ribs 6 exl'tending' from the top `nearly to the lower means for preventingthe entrance of dust K `6 and lies upon the floor, as clearly shown in Figure 6. The strips 9 and l0 are vjoined to the margin of the screen by rivets 12 extending therethrough.

Beside stidening the upright portion 10 and horizontal portion il of the outer strip serve to prevent the ingress of dust and the like in the operation of cleaning the auditorium floor.

The shape of the diffusers permits the casing to be low without'interfering with the easy unobstructed delivery of air, a factor of importance in installations in auditoriums equippedwith low-slung seats, and by directing the currents in opposite directions longitudinally of the row of seats, the fresh air is introduced without discomfort to the chair-occupants- By reason of the large admission and delivery areas, due to the shape of the improved diifuser, a smaller number may be employed Ito``v supplyfthe required volume of air, thus eifectingasaving 1n`air-duct construction.

In :the complete `form` of thek invention, as illustrated in the drawings, two independent dampers 14 are provided within the casing, one for each end, by which the flow ofair may be controlled. Each damper comprises a plate of sheet metal mounted upon 'a transverseshaft l near thecentreof the casing, havinga handle 1 6 on the exterior by which thelplatefmay be raised or lowered I to expose more or less 'of the open end, and the handle y is'A `arranged to engage in notches 17 on a segment l1,8 to hold the damper in the adjusted position.A

'1.,'l`he dii'user described, comprising a Casing open atl the ends and bottom and closed atthe opposite sides and having its sides and top upwardly and oppositely in-` clined from :the centre, adapted to receive arfthrough such bottom and deliver it opv positlely :simultaneously through such flared ,2, .The diifuser described, comprising a casing; openiat the ends and bottom4 and closed at opposite sides and 'having its sides and top upwardly and oppositely inclined from the centre, ladapted to receive air through such bottom' and deliver it oppositely throughl such flared ends, and open.` work screens covering the openings at such ends, the opening in the bottom being con-` tinuous from end to end. v

The diffuser described, comprising ycasing .open at the ends andfbottom ,and

positely `inclined fronillthe centre', adapted toreceive "i1-ir through such` bottom' and deliver it oppositely `throughsuch'flared ends,

and a horizontally disposed damper in eac-hof said ends arranged, to swing vertically and control the iiow throughsuch ends.

`5. 'The diffuser described, comprising la casing open at the'y ends andn bottoni; and having its sides and top upwardly and oppo- `sitely inclined from the centre, adapted to receive air' through such, bottom and deliver it oppositely through such ends, ahorzontally disposed dainper'in each ofgsaid ends arrangedto swing verticallyand controlthe flow through such ends,`andmeansv kon 'the exterior of said casing for moving `said dampers independently Aand yholding them in the adjustedposition.- I

In testimony ythat we claim the invention above set forthwe afiliX `our sig-natures;

s ABRAHAM nniEDMAN.

nnrHU-RF. n-.Nownns

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