US1275650A - Furnace-door. - Google Patents

Description

J. BORGE.

FURNACE DOOR.

APPLICATION FILED APR.6. 191a. RENEWED JAN. n. ma.

Patented Aug, 13, 1918.

2 SHEETS-SHEET ll. BOHGE.

FURNACE DOOR.

APPLICATION FILED APR. 6. I9l6. RENEWED JAN. 11.1910.

1,275,650. Patented Aug. 13, 1918.

2 SHEETS-SHEET 2- UNITED sTArrnsrATnn OFFICE.

JOHN BORGE, OF NEW YORK, N. Y., ASSIGNOR T0 BORGE IN'GINERATOR CORPORATION,

OF NEW YORK, N. Y., ACORPORATION OF NEW YORK.

FURNACE-DOOR.

To all whom it may con cern:

Be it known that 1, JOHN Boron, a subject of the King of Norway, and a resident of the city of New York, county of Kings, and State of New York, (whose post-office address is Flatiron Building, New York city,) have invented a new and useful Improvement in Furnace-Doors, of which the following is a specification.

The object of my invention is to provide a furnace door which contains two parts, one covering the fire box opening, and the other the ashpit opening, and this door is so arranged and disposed that it constitutes both a preheater and a regulator for the air supply. This and other objects are accomplished by my invention, one embodiment of which is hereinafter more particularly set forth.

For a more particular description of my invention, reference is to be had to the accompanying drawings, forming a part hereof, in whicha Figure 1 is a front elevation of my improved door applied to a furnace;

Figs. 2, 3 and 4 are sectional views taken on the lines 22, 3-3, and 4-4 respectively of Fig. 1, looking in the direction of the arrows; and

Fig. 5 is a sectional perspective view of a furnace provided with my improved door.

Throughout the various views of the drawings, similar reference characters designate similar parts.

My improved door 1 is composed of an upper section 2 opposite the fire box 3 and a lower section 4 opposite the ashpit 5, and these sections are hinged at one side to the sectional pillar 6 by means of suitable hinges 7. A second sectional pillar 8 is placed beside the door 1 and on the side opposite to the hinged side. Each of the pillars 6 and 8 is hollow, open at the top and provided with a side opening 20 near the bottom which connects with the ashpit. To regulate, hinged covers 6 and 8 respectively are placed over the tops of these pillars.

The sections 2 and 4 are so made that the upper overlaps the lower, so that when the lower door is opened, both. doors will be opened for a purpose that will appear below. The upper door may be-opened inde pendently of the lower door and to facilitate this opening, a handle 9 is provided. The lower door has a corresponding handle 10.

Specification of Letters Patent Patented Aug, 13, 19155, Application filed April 6, 1916, Serial No. 99 ,297.

Renewed January 11, 1918. Serial No. 211,453.

The upper section 2 is provided with a front plate 11 which is spaced from a rear plate 12 by suitable stay bolts 13, or other suitable means, thus forming an air passage between said plates. Rods 14 are mounted to turn between the front and rear plates,

and said rods carry dampers 15, which may be swung so as to permit more or less air to flow between the front 11 and rear plate 12, as shown. If desired, they may be thrown so as to shut off practically all air. As shown in Fig. 3, the frontll is also con nected to the rear plate 12 by means of the end walls 16, and it will be understood that there is no closing either at the top or bottom of the front wall 11, so that air may rush freely in a vertical and downward direction between the parts 11 and 12 to the extent permitted by the dampers 15.

The lower section 4 differs from the section 2 in that it has no rear plate, and no dampers and no stay bolts. It has a bottom 17 which is connected to sides 18 and a front 19, as shown. The door 1 is fitted so as to form an air-tight joint, or a substantially air-tight joint with both the opening to the ashpit and the opening to the fire box, except in so far as shown, through the air passage formed as above described.

In view of the foregoing, the operation of my improved door will be readily understood. Assuming the parts to be as shown, the dampers 15 are more or less opened by turning the rods 14 to the desired extent, and air will then pass as indicated by the arrows in Fig. 5, between the rear plate 12 and front 11, of the upper section 2 and thence downwardly by the stay bolts 13 to the chamber formed in the lower section 4, and thence into the ashpit 5 and up through the grate 20 to the fire, in the conventional manner. i

It will be noted that the construction herein shown and described prevents an overheating of the rear plate 12, and that the air entering through the door, as above described, is preheated through this rear plate 12, and the overlapping of the sections 2 and 4 prevents an opening of the section 4 without opening the section 2, and so prevents the rear plate 12 from getting burnt when the ashes are cleaned out. The air entering through the pillars 6 and 8 will also be preheated to a lesser extent.

"While I have shown and described one embodiment of my invention, it is obvious that it is not restricted thereto, but is broad enough to cover all structures that come Within the scope of the annexed claim.

What I claim is: .s

In a device of the class described, a furnaee having ash pit and fire box openings, at door in two sections, the upper section covering the fire box o ening, the lower section covering the ash pit opening, andthe upper s ction overla ping the lower section, a rear plate secured to the upper section and spaced therefrom to form an air passage between said upper section of the door and said rear plate, means for regulating the air flow through said passage, said air passage being open to the atmosphere at its upper end and JOHN B'ORGE.

Copies of this eaten may be obtained for five cents eaeh, jay addressing the "commissioner of ratenn. Washington, a. c."

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