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Publication numberUS529224 A
Publication typeGrant
Publication dateNov 13, 1894
Filing dateSep 19, 1893
Publication numberUS 529224 A, US 529224A, US-A-529224, US529224 A, US529224A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Nathan t
US 529224 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(N0 ModeLj N. D. WHITE. STOVE DAMPER, 6w.-

Patented Nov. 13, 1894..




SPEGIFIGATION forming part of Letters Patent No. 529,224, dated November 13, 1894.

Application filed September 19, 1893. Serial No. 485,834. (No model.) I

To all whom it mayconcern Be it known that l, NATHAN D. WHITE, of Akron, in the county ofSummit and State of Ohio, have invented certain'new and useful ing the door or damper, the object being to provide means for the purpose indicated that is exceedingly simple in construction, convenient and durable, and whereby there is no liability of the ingress of air at any point when the draft-door or damper is inits closed position.

My invention also consists in the peculiarities of construction and combinations of parts hereinafter described and pointed out in the claim.

In the accompanying drawings, Figure l is an outer side elevation of an ash-pit-door provided with a draft-door or damper embodying my invention, the draft-door or damper being shown in its closed position. Fig. 2 is a section on line 22, Fig. 1, and Fig. 3 is a section on the same line excepting that the draft-door or damper is shown in an open position. Fig. 4 is a section on line 4-4, Fig. 1, looking in the direction of the arrow, and Fig. 5 is an enlarged side elevation of the operating-screw detached. Fig. 6 is an elevation, illustrating a slight modification.

Referring to the drawings, A represents the ash-pit-door or casing provided with a draftopening, a, the draft through which is regulated or out ofi by means of a door or damper, B, that is hinged at or near opposite ends, as at (J, to the upper portion of the ash-pitdoor, the draft-door or damper having, preferably,

' upwardly-projecting lugs or ears, B, that are pivoted at or near their outer ends to outweirdly-projecting lugs or ears, A, of the ashpit-door. The draft-opening a, is preferably provided with a flange at extending all around the outer end of the opening, and the draftdoor or damper, on its inner side and extending all around the damper, is provided with an inwardly-projecting flange b that, when the draft-door or damper is in its closed position as shown in Fig. 2, is adapted to fit over external flange a of the ash-pit-door, and

bear upon the flat surface a formed upon the ash-pit-door, or casing having the draft-opeuing, next outside of flange a.

As already indicated, my invention consists more particularly in the means employed for opening and closing the draft-door or damper, and the means employed for the purpose is preferably, as follows:-The draftdoor or damper at the top, and centrally between the hinges, is provided with an upwardly-projecting flange, B that is cut away at the central portion, as at B to accommodate the location and operation of a thumb-screw, D, the shank whereof, at its inner end, is screw-threaded and engages a correspondingly-threaded hole, a in the ash-pit-door or the casing or member provided with the draft-opening, the screw having a pair of annular shoulders or collars d d, engaging opposite sides of flange B respectively, and the ash-pit-door or casing containing the draft-opening, having a depression a to accommodate the location of the inner shoulder or collar.

By the construction just described, it will be observed that the draft-door or damper is actuated to close or open according as screw D is turned in the one direction or the other. It will also be observed that an important feature of my invention consists in the location of the-operating screw between the axial line of the point of hinging the draftdoor or damper and the draft-opening or damperproper. By this arrangement of parts, itis obvious that when the draft-door or damper is closed, a uniform bearing is had all around the-edges of the damper, thereby eifectually preventing any ingress of air in the closed position of the damper. I would also remark that the ash-pit-door or casing provided with the draft-opening is preferably provided with raised portions a to afford bearing for flange B of the draft-door or damper, the surface of such raised portions being located in the same or approximately the same plane with the flat or plain surface a against which the damper proper bears in the closed position of the same. I would have it understood, however, that my invention is not limited to the details of construction hereinbefore described. For instance, instead of hinging the draft-door or damper at two points as shown in Fig. 1, the same might be hinged only at one point as shown in Fig. 6. This and other slight modifications may be made without departing from the spirit and purpose of my invention.

The raised portions a of the ash-pit-door or casing that afford bearing for flanges B in the closed position of the draft-door or damper, also prevent any strain upon the axial pins of hinges O inclosing said door or damper, the arrangement of parts being such that in the closed position of the draft-door or damper, said raised portions on the ash-pitdoor or casing A shall afford bearing for :5

flanges B hat I claim is- In a stove or furnace, the combination with the casing or member A having a draft-opening a; draft-door or damper for regulating or controlling the ingress of air at said opening, said draft-door or damper being hinged to the supporting-casing or member, and suitable means for actuating the draft-door or damper to open or close, of raised portions (1 upon the supporting-casing or member and one or more flanges or projecting members 13 upon the draft-door or damper and having bearing upon the aforesaid raised portions a in the closed position of the draft-door or damper, substantially as set forth.

In testimony whereof I sign this specification, in the presence of two witnesses, this 3d day of July, 1893.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4368722 *Aug 15, 1979Jan 18, 1983Lynch Richard ADevice and method for converting wood into thermal energy
Cooperative ClassificationF23L13/06