US1863949A

US1863949A - Ventilating apparatus

Info

Publication number: US1863949A
Application number: US366232A
Authority: US
Inventors: Stewart Alexander William
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-08-10
Filing date: 1929-05-27
Publication date: 1932-06-21
Anticipated expiration: 1949-06-21

Description

June 1932- A. w. STEWART 1,863,949

VENTILATING APPARATUS Filed May 27, 1929 i 2 Sheets-Sheet 1 FIG- I.-

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A; w. STEWART VENTILATING APPARATUS Filed May 27, 1929 2 Sheets-Sheet 2 Patented June 21, 1932 UNITED STATES ALEXANDER WILLIAM STEWAR'LFOFZ GLASGOW, SCOTLAND VENTILATING APPARATUS Application filed May 27, 1929, Serial No. 366.232,fan'd in Great Britain August 10, 1928.

This invention relates to improvements in ventilating apparatus of the type in which air is deliveredat low velocity through a louvre.

In the use of such louvres it is frequently experienced that the velocity in the trunk or duct to which the louvre is fitted or with which the louvre communicates is much in excess of that at which the air is to be delivered from the louvre. 'On account of the high mission from the trunk.

air velocity there is liable to be unequal distribution of the air delivery, the major part of the air being delivered near that end of the louvre remote from the point of air ad- The object of the present invention is to obviate this drawback and insure approximately uniform distribution of the air delivery.

According to the invention provision is made for splitting into two oppositely directed streams the air flowing to the louvre from the trunk, one stream flowing from one end of the louvre and the other stream flowing from the opposite end of the louvre. By suitable adjustment these two streams may be arranged to have equal dynamic effects so that the pressure is substantially uniform over the entire louvred surface.

Ventilating apparatus constructed in ac cordance with the invention. is illustrated in the accompanying drawings in which Figs. 1 and 2 show one embodiment, Fig. 1 being a front view and Fig. 2 a section on the line 22 of Fig. 1; Figs. 3 and 4 are like views showing another embodiment, Fig. 3 being a front view and Fig. 4 a section substantially on the line 4-4 of Fig. 3; Figs. 5 and 6 are like views showing yet another embodiment, Fig. 5 being a front view and Fig. 6 a section on the line 66 of Fig. 5; Figs. 7 and 8 are fragmentary sectional views showing modifications in which the apparatus is applied to a main air trunk.

Like reference characters denote similar parts in the several views. 1

In the construction shown in Figs. 1 and 2 there is attached to the delivery end of an air supply trunk 1 a box 2 the front wall 3 of which is constituted by a low velocity grid type louvre. 4 denotes a longitudinal division plate disposed centrally within the box 2 substantially parallel to the louvre out let so as to'divide the air current issuing from the trunk 1 into two streams. The division plate 4 stops short of that endof the box 2*remote from the trunk 1, fitted within the box at whichend is a concaved deflecting plate 5. Pivoted at 6'to the end of the plate 4'adjacent. to thetrunk 1 is an air-guiding flectedsoasto flow between tlie plate 4 and the wall 3 in the opposite direction to 'the first stream. It will be understood that, with suitable angular movement of the flap 7 equal dynamic effects may be imparted to the two streams of air so asto insure uniform distribution of air delivery through the louvre. i In the construction shown in Figs. 3 and 4 the air supply trunk 1 is connected to the box 2' midway of the length thereof, the trunk being 'e'onnectedto the rear wall of the box as shown in full'lines in Fig. 4 or the trunk may beconnected'to one of the side walls of the box as shown in chain-dotted lines in Figs. 3 and 4." Hingedly connected at 10 midway of the length of the box are a pair of angularly movable members 11 of a sectional division platell each carrying at its free end a nut 9 penetrated by a screw 8 journalled in the wall 3. 5 denotes concaved deflecting plates fitted one in each end of the box. As

shown by the arrows in Fig. 4, air entering the box from the trunk 1 is divided into two streams flowing in opposite directions between the rear wall of the box and the division plates 11 towards the concaved deflecting plates 5 by which the direction of flow is reversed the streams returning between the plates 11 and the wall 3. It will be under-.

stood that, with suitable angular adjustment of the plates 11 uniform distribution of air delivery through the louvre may be ensured.

In the construction shown in Figs. 5 and 6 the air trunk 1 is connected to the box 2 as in the construction shown in Figs. 3 and 4. Located within the box is a bent division plate 12 midway of which is pivoted at 13 an air deflecting plate '14 angularly movable by adjustment of a screw 8 penetrating the division plate 12 and journalled in the wall 3. 5 denotes concaved deflecting plates fitted one in each end of the box. It will be understood that the plate 14 divides the incoming air current into streams flowing in opposite directions towards the concaved deflecting plates 5, and there reversed so as to return between the plate 12 and the wall 3. V In the construction shown in Fig. 7 there is fitted into. a main air trunk 15, so as partially to intercept the air current a box 2 having an open end 16 opposed to the direction of air flow through the trunk 15. In register with the box is a louvre 3 secured to the trunk 15. Fitted within the box 2 is a division plate 4 pivoted to which is an angularly movable guiding plate 7 as in the construction shown in Figs. 1 and 2. r

In the arrangement shown in Fig. 8 a box 2 provided with a louvre 3 and internal bent.

division plate 12 is secured to the exterior of a main air trunk 15 over an opening 17 formed therein. i

Ventilating apparatus, comprising, in combination with an air trunk, a casing one side wallof which presents an air outlet, the opposite side wall of said casing being connected to said airtrunk, a sectional division plate in said casing interposed between said casing side walls, the ends of said division plate beingspaced from the end Walls of said casing, said division plate extending substantially parallel to the plane of said. outlet, said division plate positioned to divide the air entering said casing from said trunk into two streams flowing in opposite directions, means for effecting angular adjustment of the sections of said division plate, and concaved deflectors interposed between the ends of said division plate and the end walls of said-casing. e i V r In testimony whereof I have signed my name to this specification.

ALEXANDER WILLIAM STEWART.