Title:
Fireplace air feeder construction
United States Patent 2470430


Abstract:
This invention relates to fireplace construction, and more particularly to an improvement for use in connection with fireplaces. This specification is a continuation in part of my abandoned application, Serial No. 518,435, filed January 15, 1944. One of the principal objections to fireplaces...



Inventors:
Hicke, Carter Randolph
Application Number:
US60251145A
Publication Date:
05/17/1949
Filing Date:
06/30/1945
Assignee:
Hicke, Carter Randolph
Primary Class:
International Classes:
F24B1/19
View Patent Images:
US Patent References:
2375318Draft device1945-05-08
2103171Fireplace air blasting1937-12-21
1943223Heating apparatus1934-01-09
1711090Fireplace1929-04-30
0219530N/A1879-09-09
0207362N/A1878-08-27
0131994N/A1872-10-08
0056379N/A1866-07-17
0012491N/A1855-03-06



Foreign References:
GB190300635A1903-12-10
GB187703465A
GB308136A1929-03-21
GB191028089A1911-06-08
GB411890A1934-06-11
GB460136A1937-01-22
Description:

This invention relates to fireplace construction, and more particularly to an improvement for use in connection with fireplaces.

This specification is a continuation in part of my abandoned application, Serial No. 518,435, filed January 15, 1944.

One of the principal objections to fireplaces as the source of heat for dwellings is the fact that the draft created by the fire in the fireplace flue, as well as the air required in the combustion of the fuel, .is drawn from the room in which the fireplace is located and necessarily brought into the room by cracks around doors and windows, thus creating undesirable cold drafts in,the room and restricting the actual heating: value of the fireplace to the radiation upon persons or objects sitting directly in front of the fire. A further objection is the common tendency of ordinary fireplaces to smoke.

The object of the present invention is to provide a simple device which may be built into a new fireplace and which will, in that connection, simplify the fireplace construction or which maybe added to fireplaces already constructed. or supplied in the form of a removable attachment where desired for use in either fireplaces or stoves adapted to introduce into the fireplace a supply of air from outside the building sufficient, to provide adequate combustion for the fuel and supply the normal amount of air withdrawn .by the flue from the fireplace, thereby materially reducing, if not entirely eliminating, the- withdrawal of air from the room.

A further object is to provide, a device which has been found to effectively prevent smoke escaping into the room.

The invention consists in the novel construction, arrangement and combinations of parts, hereinafter more particularly described, and: claimed.

Three sheets of drawings accompany this specification as part thereof, in which like reference characters indicate like parts throughout., Figure 1 is a transverse vertical' cross-section through a fireplace showing one form of the present invention installed; Figure 2 is a horizontal cross-section taken on line 2-2 of Figure 1; Figure 3 is a fragmentary horizontal crosssection shown through a fireplace with the present invention installed, illustrating another mode, of supplying air to the device; Figure 4 is a fragmentary vertical' cross-section taken on line 4---4oflgure 3; Figure 5 is a fragmentary. vertical crosssection through a fireplace hearth showing a further modified means of supplying air to the fireplace; Figure 6 is a vertical transverse cross-section through a fireplace showing another modified form of the device; Figure 7. is a vertical transverse cross-section through a fireplace showing a still further modified form of the device in position; Figure 8 is a horizontal cross section. taken on line 8-8 of Figure 7; Figure 9 is a fragmentary vertical cross, section showing a modified form of adjustment device..

Figure 10 is a vertical cross section through a modified form of the device.

Figure 11 is a horizontal cross section taken on line I1-I-1 of Figure 10.

In accordance with the present invention, an elongated nozzle is positioned at the front of the hearth proper 2 of the fireplace and extending from side wall to side wall of the fireplace. As illustrated in Figures 1 to 6, the nozzle 5 is formed by spaced metal plates which converge to a restricted longitudinal aperture adapted to direct air from the nozzle in the form of a curtain upwardly and rearwardly toward the back I of the fireplace.

Associated with the nozzle structure 5 is an elongated lid or cover 8 hingedly connected adjacent to the nozzle mouth and adjustably supported from the hearth as by threaded bolt 9.

This cover can be used either to entirely close the mouth of the nozzle 5 or to cooperate with the nozzle in adjusted positions in modifying- the direction of the air curtain.

The nozzle 5 is associated with a conduit 6 which, as illustrated in Figure 1, is particularly adapted for use in the construction of new fireplaces and: which as illustrated extends diagonally backwards under the hearth so that its upper wall 15 can be utilized in the construction of the fireplace to support the hearth structure 2. The conduit 6 is connected to an orifice 7 passing through the back chimney wall through which air is admitted through conduit 6 to the nozzle 5.

In the application of. the device shown in Figures 3 and 4, the nozzle 5 is associated with a similar conduit 6, but the air is supplied to the conduit 6 from the side through a subsidiary flue 10 built into the chimney. In this arrangement the air for the nozzle will be drawn downwardly through the flue 10 thence through the conduit 6 and supplied to the nozzle 5.

In the form of the invention illustrated in Figure 5 the nozzle 5 communicates with the conduit 6 which may be arranged in the cellar below the room in which the fireplace is positioned and which will communicate with the exterior at any convenient point.

As illustrated in Figures 1 and 4 the standard ash chute 3 can be conveniently passed through the conduit 6.

In the form of the invention illustrated in Figure 6 the nozzle 5 communicates with a conduit 6 in the cellar which is provided with a downwardly sloping floor communicating with an outlet 3' so that ashes can be swept from the hearth floor into the nozzle 5 and discharged through the inclined chute 3' into a bin in the chimney structure below.

In the form of the invention illustrated in Figures 7 and 8 the device is constructed as a removable attachment and comprises spaced plates II and 12 separated by spacer members 13 and the conventional ash chute structure 3 can be conveniently connected with a suitable orifice in the upper or false hearth plate 12. The plates 11 and 12 conform in shape and arrangement with the hearth floor of the fireplace and the lower plate 11 extends beyond and is bent upwardly so as to form with the forward edge of the upper plate 12 the outlet nozzle 5 adapted to direct the air current upwardly and backwardly toward the rear wall I in the fireplace as in the other forms of the invention illustrated.

Where such a removable structure as illustrated in Figure 7 is utilized, it will only be necessary to cut a relatively small air inlet 7 in the back wall of the chimney communicating with the space between the plates II and 12.

It will be noted that the structure illustrated in Figures 7 and 8 can be used with either masonry or metal fireplaces.

As illustrated in Figure 9, the adjustable support is shown in a preferred form as a bell crank 15 having one arm formed with a terminal eye 1 to receive the end of a poker and the other end threaded and carrying an adjustable nut 9'.

This permits adjustment with a poker to direct the air flow either more directly on the fire or upwards toward the flue, as desired.

In Figures 10 and 11 are illustrated modifications of the nozzle construction in which a tube or pipe IT provided with parallel, spaced, longitudinally extending slots 18 and 19 is rotatably mounted as by means of straps 20 one at each end and provided with a handle 21 by means of which it may be rotated on its long axis to vary the angularity of the air discharge slot 18 with respect to the hearth, fire and flue. The upper edge of the slot 18 is preferably beveled to cooperate with the adjacent edge of the hearth to shear any embers. With this construction ashes may be swept from the hearth through the nozzle and conduit into the ash depository below.

In this form it has been found desirable to associate a second nozzle parallel with the valve 17 comprising spaced side members 22 and 23 extending from side wall to side wall of the fireplace, one of these side members 22, having a portion 24 hinged thereto and provided with a threaded control bolt 25 by means of which the angularity of the air discharge may be controlled.

With this supplementary nozzle, it will be noted that when the fire is being lighted or when thereafter new fuel is added and it is desired to supply additional air directly to the fire, the valve 7 can be adjusted so as to direct the outlet slot 18 directly on the fire while, at the same time, a curtain of air directed upwardly and across the face of the fireplace opening from the nozzle formed by the members 23-24 will still operate to effectively seal the combustion chamber from the room, thus preventing any eddies of smoke from the fire from escaping into the room.

The curtain of air sealing the combustion chamber of the fireplace from the room, thus operates to prevent smoke escaping into the room, and by excluding air from the room, makes control of the rate of combustion of the fire subject to much more exact regulation than hitherto possible.

Various other modifications will readily suggest themselves to those skilled in the art, but within the scope of the present invention, as claimed.

Having thus fully described my invention, I claim: 1. In combination with a fireplace including an open front combustion chamber with side and back walls, hearth and chimney flue, the hearth provided with an elongated slot extending from side wall to side wall at the front of and within said side walls of said combustion chamber, conduit means for supplying air to said slot from the exterior of the room into which the fireplace opens and valve means positioned in said conduit comprising a tube of less width than the conduit extending from side wall to side wall, said tube having two parallel longitudinally extending, circumferentially spaced slots adapted to register selectively with the conduit and the combustion chamber, and means for rotating said tube on its long axis and horizontally spaced deflectors extending lengthwise of the conduit parallel with the tube defining a nozzle outlet exterior to and coextensive in length with said tube.

2. In combination with a fireplace including an open front combustion chamber with side and back walls, hearth and chimney flue, the hearth provided with an elongated slot extending from side wall to side wall at the front of the combustion chamber, conduit means for supplying air to said elongated slot from the exterior of the room into which the fireplace opens and valve means positioned in said conduit comprising a tube of less width than the conduit extending from side wall to side wall, said tube having two parallel longitudinally extending, circumferentially spaced slots adapted to register selectively with the conduit and the combustion chamber, with means for rotating said tube on its long axis, and horizontally spaced deflectors extending lengthwise of the conduit parallel with the tube defining a nozzle outlet exterior to and coextensive in length with said tube arranged to direct air into said combustion chamber and over the fire therein with the deflector adjacent the tube arranged substantially tangently with respect to that tube.

3. In combination with a fireplace including a combustion chamber having side and back walls, a hearth, a flue, and a front opening communicating with a room to be heated, said hearth having an upwardly open elongated slot at the front of said combustion chamber and at the bottom level of said front opening and extending from side wall to side wall of said combustion chamber, conduit means for supplying air to said slot from the exterior of said room, a rearwardly upwardly directed deflecting member pivotally mounted at the front edge of said slot for directing air generally upwardly and backwardly toward the interior of said combustion chamber, and means for varying the angular position of said deflecting member whereby the air from the exterior of the room will be directed toward the combustion chamber so that the flue draft will entrain cool air from said slot in the form of a curtain which is coextensive with said fireplace opening.

4. In combination with a fireplace including a combustion chamber having side and back walls, a hearth, a flue and a front opening communicating with the room to be heated, an elongated upwardly open aperture in said hearth extending from side wall to side wall of said combustion chamber, conduit means for supplying air to said aperture from the exterior of said room, means directed rearwardly upwardly and operatively associated with said aperture and serving as an extension of the upper edge of said aperture and thereby forming the front lowermost edge of said opening between said fireplace and said room for directing air issuing from said aperture upwardly into said fireplace toward said flue whereby the flue draft entrains a curtain of cool air across the front of said opening to effectively isolate the air in said room from the air in said combustion chamber and prevent the heated gases and smoke in said combustion chamber from entering said room.

5. In combination with a fireplace including an open front combustion chamber having side and back walls, a hearth and a flue, said fireplace being in open communication with a room to be heated, a nozzle at the front of said combustion chamber having an eduction slot for admitting air to said combustion chamber from a source extraneous to said room, said eduction slot being arranged within said fireplace and extending from side wall to side wall of said combustion chamber, the edge of said eduction slot of said nozzle being operatively associated with said hearth so as to constitute the lowermost edge of the open space between said room and said combustion chamber, said nozzle having an upwardly rearwardly directed deflecting member so positioned relative to said combustion chamber as to direct the air issuing from said nozzle rearwardly and upwardly into said fireplace toward said flue, conduit means for supplying air to said nozzle from the exterior of said room whereby air issuing from the elongated slot of said nozzle will be entrained by the flue draft in the form of a curtain of cool air which is coextensive with said fireplace opening to effectively isolate the air in said room from the air in said combustion chamber and to prevent the heated gases and smoke in said combustion chamber from entering said room.

6. In combination with a fireplace including an open front combustion chamber with side and back walls, a hearth and chimney flue, parallel spaced nozzles extending from side wall to side wall within the combustion chamber adjacent the hearth and at the front of the combustion chamber, said nozzles being upwardly open and including a rearwardly upwardly directed deflecting member for directing air in a direction over the fire and toward the rear of the combustion chamber, conduit means for supplying air to said nozzles from the exterior of said fireplace into which the fireplace opens, and means for adjusting said nozzles to vary the angularity of the streams of air therefrom within said combustion chamber.

7. In combination with a fireplace including an open front combustion chamber with side and back walls, a hearth and chimney flue, said hearth being provided with an upwardly open elongated aperture extending from side wall to side wall at the front of said combustion chamber, conduit means for supplying air to said elongated aperture from the exterior of the room into which the fireplace opens and valve means positioned in said conduit comprising a tube extending from side wall to side wall, said tube having two parallel longitudinally extending circumferentially spaced slots adapted to register selectively with said conduit and said combustion chamber, said slots being so spaced that when one slot registers with said conduit the upper edge of the other of said slots will be in a position for directing air upwardly and rearwardly toward the interior of said combustion chamber, and means for rotating said tube on its long axis. RANDOLPH HICKE CARTER.

REFERENCES CITED The following references are of record in the 40 file of this patent: UNITED STATES PATENTS Number 12,491 45 56,379 131,994 207,362 219,530 1,711,090 50 1,943,223 2,103,171 2,375,318 55 Number 635 3,465 308,136 28,089 60 411,890 460,136 Name Date Smith, et al. -...---- Mar. 6, 1855 Cowan --------- July 17, 1866 Bradford ------ Oct. 8, 1872 Lester ----------... . Aug. 27, 1878 Sage ------------ Sept. 9, 1879 Ford, et al. ------- Apr. 30, 1929 Lutz -- -------_ Jan. 9, 1934 Nilson --------- Dec. 21, 1937 Mudgett -------- - May 8, 1945 FOREIGN PATENTS Country Date Great Britain ---------- 1903 Great Britain ------------ 1877 Great Britain -_-__ Mar. 21, 1929 Great Britain ------------ 1910 Great Britain ----. June 11, 1934 Great Britain ------ Jan. 22, 1937