US1787738A

US1787738A - Damper

Info

Publication number: US1787738A
Application number: US289748A
Authority: US
Inventors: William B Sturgis
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-07-02
Filing date: 1928-07-02
Publication date: 1931-01-06
Anticipated expiration: 1948-01-06

Description

Jan. 6,' 1931. w. B. sl'ruR'Gls DAMPER File@ July 2. 1928 ,UQ @sa Passed Jan. 6,1931' UNITED STATES WILLIAM B. STURGIS, OF CHICAGO, ILLINOIS man Application 1ed-J'u1y2, 1928.` Serial No. 269,748.

The present invention relates generally to automatic draft regulating devices for maintaining a uniform or constant draft in the flue or outlet conduit of a heating apparatus by automatically regulating the entry of air into such flue in response to variations or uctuations in the pressure of the escaping gases and products of combustion." More particu? larly the invention' relates to that `type of draft' regulating device which embodies a counterbalanced damper plate which is positioned adjacent to one end of a horizontally extending air inlet pipe .or passageway and is mounted to swing on a xed horizontal axis which is disposed eccentrically with respect to the damper plate and the inlet pipe. One object ofthe invention is to provide a draft regulating orv damper device of the aforementioned type which, is generally of an improved character and may be adjusted readily to maintain a draft of the desired intensity.

Another object of the invention is to provide a damper device which is so constructed that it operates in an extremely efficient manner and ma be produced at a low cost. Other obJects of the invention and the various advantages and characteristics of the present damper construction willbe apparent from a consideration of the following detailed description. v

The invention consists inthe several novel features hereinafter set forth and more par ticularly defined by claimsl at the conclusion hereof.-

In the -drawings which accompany and form apart of this specification or disclosure and in ywhich like numerals of reference denote vcorresponding parts throughout the several views t l K Fig. 1 is a partially .sectioned side view of the damper, when not affected by a draft;

Fig. 2 is a front view of the damper;

Fig. 3is a fragmentary-view'corresponding to a portion of Fi 1, showing theaction of thedamper under t efdaft for which set;

Fig. 4 is a similar view, showing the acxtion ofthe damper under an increase in the I draft; and

I1`igs.v 5, 6 and 7 are 'views corresponding to Figs. 1, 3 and 4, with the damper set for a lighter draft, Fig. 5 showing the damper` when not affected by a draft, Fig. 6 showing the action of the damper under the draft for which set, and Fig. 7 showing the action ofl the damper under an increase inthe draft.` The damper device shown in the drawing is incorporated in the cylindrical part 10 of a T-shaped pipe section 11, and consists of a circular plate 12 which is of such size as to close off the passageway in the part 10. The plate 12 is pivotally mounted in the part 10 on a horizontal rod 13. The rod 13 engages frictionally in straps 14 secured to the back of the plate, and is journaled freely at the edges of the plate in apertures 15 in the part 10. The rod 13 is placed below the center of the passageway in the part 1,0and engages with the plate 12 below the center of the latter. A sto portion of the p ate 12 and has an offset downwardly extending portion which is adapted to engage with the lower edge of the part 10 when the plate 12 is in the position Y.of the damper is adjustably counterbalanced..

ATo set the damper to give a moderate, draft, the stop 16 is held against the lower edge of the part 10 and the handle portion 17 ofthe rod 13 is swung against the frictional resistance offered by the straps 14C into the parallel position shown in Fig. 1. The suction from the current of air passing upwardly within the pipe section 11 will swing the plate 12 into the position shown in Fig. 3, since the area of the plate above the pivot rod 13'is greater than the area of the plate below the rod. Should the draft for any reason increase beyond that desired for the oil burneror other heat-ing plant with which the damper is associated, the resulting additional suction on the upper portion of the plate 12 will swingthe same into the position shown in Fig. 4, thereby permitting an increased iow of'air into tliepipe section through the passageway in the part 10 to 16 is secured to the lower f counteract and compensate for the increased draft in the pipe section. Should a lighter draft be desired, the stop 16 is held and the handle port-ion 17 of the rod 13 is swung into an angular positionv with respect to the plate.

- affecting the same, into the position shown in Fig. 5. Under the draft desired, the plate l 12 will swing into the position shown in Fig.

6 to permit `a small counteracting current of air to enter the pipe section through the passageway in the part 10, and, under an increase in the draft, the plate will swing into the position shown in Fig. 7

Should a draft heavier than that provided for in either the setting shown in Fig. 1 or the setting shown in Fig. 5 be desired, the stop 16 is held and the handle portion 17 of the rod 13 is swung into an angular position on the opposite` side of the lower portion of the plate from that shown in F ig. 5, thus considerably over-balancing the upper'portion of the plate.

The handle portion 17 of the'rod '13 will stay in any angular position in which (placed with respect to the Jplate 12, and an esired draft adjustment may be easily e ected by changing the relative positionof thehandle portion 17.

I claim: 1. In an automatic damper device,- a T- shaped ipe section, a closure plate positioned' in the orizontal passageway of said ipe section, andV a horizontal rod journaleg in said pipe section and en aging frictionally with said closure plate eneath the center of the latter, said rod having a downwardly I extendin counter-balancing portion for angular adjustment with respect to said plate.

2. In an'automatic damperl device, the combination of a pipe-section having a horizontal passageway, a late for controlling the flow of vair throng -said passageway, said plate being pivoted beneath its center and so as to swing on a substantiallyhorizont/al axis, a lug connected to the bottom part/'of said plate and adapted to limit swinging movement of the plate in one direction, and a member operab e in conjunction with the lug to counter-balance the plate, said mmber being mounted so'that it may be shifted from one side of the plate to the other for draft adjusting purposes.

3. In an automatic damper device, the combination of a pipe-section having a horizontal passa eway, a damper plate vfor controlling the ow of air through the passageway,

a horizontal rod extending across the pas- .sageway and operating as an eccentric pivotal support for the plate, and a counterweight member connected to the 'rod and shiftable from one side of the plate to the other for draft adjusting purposes.

v4. In an automatic damper device, the combination of a pipe-section, a plate for controlling the flow of air through/the pipe-section, and a rod journalled in t e pipe section and operating as a pivotal mount for the plate, said rod embodying a transversely extending arm at one end thereof and being loosely connected to the plate so that the arm may be swung into different 'angular positions for draft adjusting purposes.

5. In an automatic damper device, the combination of a pipe section having a horizontal passageway, a plate for controlling the flow of air through said passageway, a support whereby the plate is pivoted eccentrically and so as to swing on a substantially horizontal axis, a lug connected to the smaller of the two parts of the plate that are at opposite sides of the pivotal support and adapted to limit swinging movement of the late in one direction, and a. member operab e in conjunction with the lug. to counterbalance the plate, said member being mounted so that it may be shifted from one ,side'of the plate to the other for draft adjusting vpur oses.

6. In an automatic damper device,t e combination .of a `pipe section having a horizontal passageway, a plate for controlling the -flow of air through said passageway, a horizontal rod extending across the lpassageway Ia .member operab e iny conjunction with the lu to counter-balance the plate, said member being connected-to the rod and shiftable into different positions for draft regulating purposes. .y

7 In an automatic damper device, the combination of a pipe section havinghslhorizontal passageway, a plate for contro g the flow of air through said passageway, a support whereby the plate is pivoted eccentrically and so as to swing on a substantially horizontal axis, a lug connected to the smallerof the two parts of the plate at oplpglsite sides of the support and adapted to 't swinging movement of the late in one direction, and a member operabll in conjunction with the li to .counterbalance the plate, said member bem mounted so that it may be swungto poses. i

8. In an automatic damper device, the combination of'a pipe section having a horizonf tal passageway, a late for controlling the ilow of air throng said pway, said plate being pivoted eccentrically and to swing on a'substantially horizontal axis and being adapted, when 1n its vertical position, to' ,close completelylghe passageway, and a eounterweight mem r for the plate, mounted so that it may be swung-to and from-said platev for draft adjusting purposes.

9. In an automatic damper devie, tlie combination of a pipe section having a horizontal passageway, a plate for controlling the dow of air throu h said passageway, said plate bein pivote eccentrlcally and to swing on a sustantially horizontal axis and being adapted, when in its vertical position, to close lcompletely the passageway, and a counterweight arm connected to the plate so that it may be swung-from one face of the plate to the other for draft adjusting purposes.

In testimony whereof I have hereunto subscribed my name.

Lamas