US1080777A - Chimney-damper. - Google Patents

Description

T. PODMORE. CHIMNEY DAMPER.

APPLICATION FILED MAR. 28, 1913.

Patented Dec. 9, 1913.

Attorneys THOMAS PODMORE, or WILKES-BARRE, PENNSYLVANIA.

CHIMNEY-DAMPER.

1,9803? '7, Specification of Letters IPatent.

Patented Dec. 2, 1913.

Application filed March 28, 1913. Serial No. 757,439.

To all whom it may concern:

Be it known that I, THoMAs PODMORE, a citizen of the United States, residing at Wilkes-Barre, in the county of Luzerne and State of Pennsylvania, have invented a new and useful Chimney-Damper, of which the following is a specification.

This invention relates to chimney dampers.

An object of the present invention is to provide a chimney dam oer which will be offset from the throat tiereof so as to be displaced from the direct alii'iement of the fire.

A further object is to provide a segmental damper presenting a concaved surface to the upper portion of the chimney whereby a back or downward draft therein will strike against the said concaved surface and be directed upward to thereby prevent a smoking of the fire-place and to thereby provide an eflicient ventilating system when the fireplace is not in use.

lVith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings accompanying this specification and forming a part thereof the preferable form of my invention is illustrated, in which a Figure 1 is a view in perspective of a section of a fireplace with my improved damper attached thereto. Fig. 2 is a front view in elevation of my improved damper including the segmental damper proper and the segmental outer casing. Fig. 3 is a vertical cross sectional view taken on the line A A of Fig. 2. Fig. l is a fragmental sectional view illustrating the chain groove which is formed integral with the damper.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, 1 is a chimney and 2 an open fireplace communicating with the flue 3, the base 4 of which is offset from the fireplace 2 and communicates therewith by the throat 5. Disposed within the flue 3 and at the base thereof is an outer casing comprising the armated metallic plate 6, the rear edge of the same formed integral with the upstanding angle plate 7 which is preferably built in the wall of the chimney to thereby rigidly retain the casing in position. The front edge of the arcuated metallic plate 6 is bent downward conforming with one wall of the throat 5 as at 8. Secured to the ends of the plate 6 are the end plates or members 9, the same extending at right angles to the plate 6 and form supporting means for the segmental damper 10. As illustrated in Fig. 8 of the drawings, the forward portion of each end plate 9 extends upward and to the extremity thereof is secured the brace bar 11, the same extending between the two end members of the plate 6 and is adapted to hold the same in position and to thereby form a rigid structure. The damper casing is positioned out of the direct line of the flames issuing from the fireplace 2 and will not be warped or disfigured thereby.

The end members 9 are provided with the bearing boxes 12 to which the segmental damper 10 is pivotally secured. The segmental damper 10 comprises an arcuated plate 13 to the extremities of which are secured or formed integral the arms 14 pivotally secured to the bearing boxes 12 of the casing by the trunnions or pivots 15. In order to provide means whereby the segmental damper may be rotated about the said trunnions, a suitable groove 16 is formed in the arcuated plate 13 and rigidly secured to one end thereof is a chain 17 the same extending over a suitable pulley 18 disposed at the front edge of the damper casing and by which means the position of the segmental damper may be changed and said damper maintained in any desired position by providing a suitable latch adapted to engage any one of the links of the chain 17.

I As illustrated in Figl of the drawings, the back draft indicated by the arrows rushing down the flue 3, strikes the concaved surface of the damper plate or casing plate and is directed upwardly to thereby prevent the down draft from passing through the throat 5 of the flue which would cause the fireplace 2 to smoke. Also it will be appreciated that when the fire place is not in use, the chim ney may be used as a ventilator to exhaust the air from the room, the damper being maintained in an open position and should the air rush down the chimney it will strike the curved plate 13 and be directed upward, thus creating an upward draft within the throat 5, from which it will be apparent that suitable provision is made should the chimney be subject to a sudden down draft, the same being practically impossible to prevent unless a suitable cowl or other means is positioned upon the top of the chimney. The damper casing is adapted to be built within the chimney and therefore form a permanent part thereof. The segmental damper pivotally engaging the end walls of the casing is adapted to rotate to thereby close the throat of the flue or to be maintained in any intermediate position there in front. The concaved surface presented to the upper portions of the chimney deflects any down draft which maybe caused therein and prevents the same from entering the fire place. Also by presenting a concaved surface to the upper portions of the chimney a convex surface will be presented to the flames issuing from the fireplace 2 and the heat will therefore be readily deflected therefrom. Furthermore by placing the casing and segmental damper in an offset position with relation to the fireplace throat the same will not be exposed to the direct heat of the fire with the result that there will be little or no danger of the easing and segmental damper warping or becoming distorted.

Having thus fully described the invention what I claim to be new and original with me is 1. The combination with a flue and a fireplace offset therefrom and communicating therewith by a throat, of a casing disposed at the base of said flue and comprising an arcuated plate with end members extending upwardly therefrom, a segmental damper comprising an arcuated plate similar in contour to the casing plate and providecl with arms extending upwardly from the ends thereof and pivotally secured to the said casing end members, said segmental damper adapted to rotate in front of said throat to close the same, means for securing the said segmental damper in adjusted position, said segmental damper presenting a concaved surface to the upper portion of arcuated plate presenting a concaved surface to the said flue, a segmental arcuated damper with arms projecting outwardly from the ends thereof, pivotally secured to the said casing, said segmenqtal arcuated damper gravitating into an open position and when situated in said open position presenting a concaved surface to the flue extending thereabove to thereby prevent any back drafts from entering the fireplace, means for moving said damper in front of said throat to close the same and presenting a concaved surface to the upper portionof the chimney and a convex surface to the fireplace.

3. The combination with a flue and a fireplace o-ffset therefrom and communicating therewith by a throat, of a casing comprising an arcuated plate, presenting a concaved surface to the upper portion of the flue, end members carried by the said arcuated plate and extending upwardly therefrom, a segmental damper comprising an arcuated plate with arms projecting upwardly from the ends thereof and pivotally secured to the end members of said casing, said segmental damper arcuated plate provided with a transversely extending peripheral groove, means fitting within said peripheral groove for moving the said segmental damper in front of said throat to close the same, said damper presenting a concaved surface to the upper portion of the chimney and a convex surface to the fireplace, said means allowing the damper to move away from said throat to present a concaved surface to the upper portion of the chimney.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

THOMAS PODMORE.

Witnesses WILLIAM PoDMoRE, LEWIS ANDREWS.

Copiesof this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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