US1845954A - Ventilator - Google Patents

Description

Patented Feb. 16, 1932 UNITED STATES PATENT ori-ice VENTILATOR application ma october 14, 1929. semi no. saaeeo.

The invention relates to Ventilating devices for use when removal of air or gases and their replacement with fresh medium is required. Itis a special aim of the invention to present a device for such purposes which is adapted to both remove and introduce air or gases simultaneously. This is of special advantage in certain situations Where heretofore it has been a practice to use a blower either to introduce fresh air, or to remove fouled air. In the first instance when fresh airis forced into a chamber such as a kitchen, the displaced air and vapors with attendant odors are apt to be forced into dining or other rooms where patrons will be annoyed; in the second instance, mere removal of undesired air and gases and permitting them to be replaced haphazardly through doors and windows results in admitting undesirable air or vapors in many instances. By the use of my invention a single compact unit is adapted to serve for removal of undesired gases and introduction of air or gases from a preferred source. In Ventilating spaces beneath roofs, it is often essential to both expel undesired air and introduce fresh air, for which my invention is especially suitable.

It is an important aim of the invention to present a combined airvent and air supply device which may be incorporated with a simple single flue mounting, involving a minimum of complication both in structural work and extent of labor involved.

A further purpose is to present a novel construction in mounting and flue constructions in such devices. It is also an object to originate a novel and useful control and operating means for such an appliance.

Additional objects, advantages and features of invention reside in the construction, arran ement and combination of parts involveg in the embodiment of the invention, as `will be understood from the following de- Scri tion and accompanying drawings; in the atter,

Figure 1 being a vertical sectional view of a portion of roof and a ventilator installed, embodying my invention,

Figure 2 is a horizontal ysectional view on the line 2-2 of Figure 1;

A suitable opening is cut through the deck between the headers 1 3, and a top thimble 14 65 with a flashing flange 15 is secured upon the upper side of the deck around this opening,

the thimble including a vertical cylindrical collar portion 16 terminating in a substantially horizontal flange 17. A bottom thimble (0 18 is secured on the headers 13 and adjacent rafter portions, the bottom thimble having a Vertical dependent collar 19 without a flange, and alined with the collar 16.

Revoluble in the two thimbles there is a cylindrical flue 20, provided with a collar 21 at the upper art adapted to lie over the flange 17, the co lar having a depending annular flange 22 extending downwardly beside the flange 17 so as to close the space beso tween the two. The flange 17 and the collar 21 where they abut are preferably of uniform undulating form, or corrugated, so that the corrugations of the collar nest with those of the flange 17 and must move across them 86 when the flue is rotated. In this Way the weight of the flue tending to hold the corrugated faces in nested relation will prevent casual displacement of the flue from positions to which it may be adjusted b rotation, as will be explained. The flue is ormed with a T terminal or head 23 at the upper end, the ends of which are onen and flared suitably.

`The flue is divided vertically by a septum or partition 23 which may abut or be joined 95 to a horizontal septum 24 diametricall arrangedin the T head 22. Affluent and e uent passages 25 and 26 are thus formed. The device may be utilized in this simple form `by leaving the bottom of the flue plain and open on both sides of the septum, and when one end of the T head is presented toward the direction in which a b-reeze blows, the air may pass freely through the passa-ge in the T head at the upper side of the septum 24, while that entering at the lower side of the septum 24 will be forced downwardly through the flue 20. The flared .entrance to the T head will cause a slight compression of air in the passage. This, together with the friction ot air moving from the upper side on that immediately below, and by the vacuous condition around the eXit end of the T head caused by the air diversion due to the iiared sides, will produce an ejector action lby which air will be drawn upwardly through the lflue to the exit end of the T head and discharged.

Means is illustrated, however, whereby a 'forced draft maybe produced from within through the eiiluent passages of the flue and T head, with an arrangement whereby the equivalent of the sim'ple flue first described may be produced at any .time when desired. Thisconsists in .the formationof a closed case or .chamber 27 on fthe lower end of the flue within which is mounted a fan 28 adapted to blow air upwardly, the case being open .downwardly and the lower end of the septum 23 being continued laterally .to close .olf the affluent passage from the chamber 27, anda .case .havin-g .an outwardly extended handle positioned conveniently for .operation .of the lever. A series of slots 32 are formed in the side .of .the iue communicating only with the efllu'ent passage, and on the flue .a shutter 33 is suitably mounted to `close the slots .by a

short movement of the shutter. The shut-ter is .connected by a link 34 with the bell crank lever y31, so that the kslots 32 are `closed at the same time V-that the valve is opened.

y ,lVhile .the invention has been incorporated in a roof as shown, if desired it may be used in its unit `form to Vbe inserted in various Yopenings in buildings or the like, and the non-essential parts in such additional uses may Ibe yomitted as discretion indicates.

kThus, for use in .openings in walls, .the cross head or T portion of the -flue may -be omitted in some cases, and the motor draft utilized without expectation of using the natural draft.

A control for the fan or blower is provided, consisting of -a switch-35 including the throw lever 36 movable upwardly to .open the switch. The switch may be connected with Vthe motor of the ytan and .with `an l,electrical source by usual circuits, not shown. As shown, upward movement of the lever 31 will close the shutter 33 and open the valve 30 by reason of connection of these elements with links extending upwardly from the outer part of the lever. The lever is eX- tended inwardly beyond its pivot ,and this extension 37 .connected by' a short link 38 to the lever 36. As a result, when the lever is raisedV to close the shutter and open the valve, the .switch to the motor of the fan is also closed and the fan caused to operate.

In both operative positions the handle klever 31 is not far from horizontal position,

so that it may also 'beused readily to rotate the ue and head n23 Iby ,horizontal movement .of the-handle, Aand ,full advantage may ghe taken of wind currents in various directions. In this use, such .adjustments of the shutter Valve and switch as may have been made will not nbe disturbed.

I claim y l Y 1. A Ventilating appliance comprising :a horizontal head having open inlet and Aoutlet flared ends `and partitioned to form :an open passage therethrough, affluent andl eliicient .ducts communicating with the inlet and outlet .ends respectively beside said passage, a blower connected with `the inner end of the eiiluent duct, a valve in the eliluent duct,"

means to operate the valves, a latenal opening :from the .effluent duct outwardly `Qi :the valve, a shutter therefor and means to yclose the shutter whenthe valve is open.

2. A ventilator appliance comprising a vertical cylindrical flue having a comment cat-ing cross head, aiiluen-t Land etliuent passages formed in the nue, said passages in ,the Vflue opening at respective ends of the head, a Support for the {flue Vincluding an annular base member encircling the flue andan opposed relatively revjoluble annular member -on the flue rest-ing on the ibase, fsaid annular members having opposed .contacting :uniformly eundulated faces, whereby fthe weight 0f the lue opposillgthe rising the .upper annular member will tend lto hold the device iin adjusted positions .and means -to rotate the 3. The structure of claim l including a control for the blower, and operative Lconnecy:tions common tothe control, the valve `and the shutter, constructed to placesaid control in .blower-operating position, open the valve and .close the shutter at one limit 0f move- Vment of the operative connections, and place the said control in non-operating position close the valve and 4open :the shutter at ,another limit of movement. Y Y

4. The structure of claim l in head and ducts lare mounted as .-a unit `Iievoluble on a vertical axis, a control for the blower mounted on Vthe revoluble i1-nit, and operative connections also mounted .on the revoluble unit between the said cont-rol, the

whichy said Ill@ valve and the shutter, constructed to place the said control in blower-operating position open the valve and close the shutter at one limit of movement of the operative connections, and at another limit of movement to place the said control in non-operating position close the valve and open the shutter, said operating means including means to rotate said unit on said axis.

In testimony whereof I aiiix m si DAVID ature. IRD.

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