US1575242A - Draft fan - Google Patents

Description

March 2 1926.

J. E. WILLOUGHBY DRAFT m Filed March 16, 1925 manlcc James E. Wfl/ouy/zby.

I'llllll Patented Mar. 2, 1926.

PATENT oFFicE;

JAMES E. WILLOUGHBY, OF KELLOGG, IDAHO.

DRAFT FAN.

Application filed March 16, 1925. Serial No. 15,878.

To all whom it may concern:

Be it known that I, JAMES E. 1L- LOUGHBY, a citizen of the United States, residing at Kellogg, in Shoshone County 5 and State of Idaho, have invented certain new and useful Improvements in Draft Fans, of which the following is a specification.

,My present invention relates to improvements in draft fans adapted especially for use in the ventilation of buildings, as dwell ings. The fan is designed for use in connection with a smoke flue or pipe from a heating stove, furnace, or other appliance, and is actuated by means of passing currents of smoke, gas or air from the fire, to drive a ventilating fan located exterior of the smoke fine. The ventilating fan is arranged in position to create a circulation of air in the room through which the smoke flue passes, by driving from the smoke flue the air warmed or heated by radiation from the smoke flue and thus inducing flow of currents of air to and from the smoke flue to be heated from the exterior thereof.

In carrying out my invention I utilize means within the smoke fine for directing or guiding the upwardly flowing currents of air or gases to the motor fans within the smoke flue to insure greatest efliciency for the motor fans and yet provide ample space for the unim eded movement of the draft from the fire.- Iea-ns are also provided for journaling the motor spindle in such manner that wear of parts may readily be compensated for and the rotating spindle provided with bearings forming a minimum frictional resistance to the operation of the device by natural draft.

The invention consists in certain novel combinations and arrangements'of parts as will hereinafter be more fully set forth and claimed.

In the accompanying drawings I have illustrated one complete example of the hysical embodiment of my invention where 1n the parts are combined and arranged in accordance with the best mode I have thus far devised for the practical application of the principles of my invention.

Figure 1 is a View in elevation showing the appliance of my invention operatively located in a section of a smoke flue.

Figure 2 is a vertical sectional view at right angles to that of Figure 1, on line 22 of Figure 1.

Figure 3 is an enlarged detail view of the spindle with its bearings in section.

In the preferred form of my intention I utilize a section of a smoke pipe 1, adapted to receive and convey smoke or gases and air from a heating or other type of stove or furnace. which flue it will be understood is heated from the interior by hot gases of combustion and radiates heat from its exterior to the room or space in which the flue is located;

I'Vithin the cylindrical flue I arrange a vertical or longitudinally extending shield preferably made up of sheet metal fashioned to proper shape and secured as by rivets at the top and bottom ends to the smoke flue. This shield is fashioned with a pair of parallel concave deflecting faces 2 and 3 which extend upwardly and curve laterally from one side of the smoke flue toward its longitudinal or vertical center as seen in Figure 2.

At their upper ends these deflecting faces terminate in reversely curved concave faces 1 and 5 which return to the wall of the smoke flue in line with the fixed bottom end of the shield.

As an auxiliary means for providing an unobstructed or unimpeded flow of the gases of combustion from the furnace through the smoke flue, the shield is slotted as at G to afford a space, in addition to the spaces at the edges of the shield, for upward draft through the flue.

lVithin the smoke flue and arranged transversely thereof are a pair of spaced motor fans 7 and 8, each alined with a deflecting face 2 and 3, and fixed by set screws or bolts 9 on the spindle 10.

The spindle is journaled transversely of the smoke flue and passes therethrough with bearings at its ends, which ends are fashioned with cone journals 11 and 12, the former being engaged within a shield sleeve 13, against a fixed bearing block 14. The bearing block is supported exterior of the smoke flue and a suitable distance therefrom on the bracket 15 which is afiixed for support on the exterior of the smoke flue.

The cone journal 12 has a bearing against a resiliently supported bearing block 16 which is encased Within a hollow bearing sleeve 17 attached by its flanges 18 and bolts 19 to the smoke fine. A shield sleeve 20 integral with the bearing sleeve 17 projects within the smoke line and over the end 12 ot the spindle as a shield therefor.

By means of a spring 21 located in the fixed bearing sleeve 17 and interposed between the adjustable bearingblock 16 and an adjustingliolt 22 in the open end or the bearing: sleeve 1?, the hearing block 16 is urged into close bearing: contact with the cone journal lit to support the spindlev By this arrangement oi parts a minimum frictional resistance is obtained between the cone journais and their bearings for the rotary spincle. and the resiliently supported bearing; block 16 ma be adjusted as required to take up wear and regulate the frictional resiszance.

On the spindle exterior of the and located between gasl-rct '23 ot the flue and the bearing hlock l-l, is an in'ipelier tan 2:: secured on the spindle in adjusted posi tion by means of a set screw in the hub ot' the tan.

The impeller tan is located adjacent to the smoke due and is revolved or rotated from the motor tans through the spindle as the gases of combustion pass upwardly through the smoke "flue and are directed by the deflectors to the motor tans.

it will he appa eat that as the heat is radiated troin the exterior ot the smoke flue the impeller tan will drive the warm air from the flue, thus causing a circulation of air in the room. the air flowing in currents by induction to the tan and being impelled therefrom by the action of the tan tor ventilation of the room.

smoke jtlue Having thus fully deszribed my invention, what I claim as new and desire to secure by Letters Patent is:

l. The combination with a smoke flue having a slotted shield therein forming a. pair 0t deflector plates for updraft through the line, of a spindle supported transversely of the smoke flue and having an exterior impeller tan thereon, and a pair of "fans within the line alined with the detiector plates for operating the impeller tan.

2. The combination with a smoke line having a shield with a central longitudinal slot therein forming a pair of concave detiector'plates extending laterally from the inner wall ot the flue and terminating in reversely curved concave faces Oi a spin-die supported transversely. ol the smoke flue and an exterior impeller tan thereon, and a pair of tans within the line alined with said detiector plates for operating; the impeller tan.

3. The eonihination with a conduit adapted for the passage of heated gases therethrougln of a hracket supported on said conduit externi-illy thereot', a bearing rigidly carried in said bracket, a spring: pres e-d hearing disposec; through a wall. of said conduit at a point diametrically opposite the first named hearing, a spindle rotatably mounted in said. hearings and cit-ending through and beyond said conc -tit impeller blades rigidly secured to said spini'lle internall o' said conduit, means in said conduit for directing the heated gases against said blades tor rotating: said spindles, and a driven meliher carried by said spindle erterna l of the conduit.

In testimony whereof I alli my signature.

JAIilES l3. 'WILLOTTGEIBY.

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