US13374A - Island - Google Patents

Description

3 Sheets-Sheet 1. S.'A. BRIGG.

Hot Air Furnace.

Patented July 31, 1855.

3. Sheets-Sheet 2. S. A. BRIGG.

Hot Air Furnace,

No. 13,374. Paterited July 31, 1855.

UNITED STATES PATENT OFFICE.

SAML. N. BRIGGS, OF PROVIDENCE, RHODE ISLAND.

HOT-AIR FURNACE.

Specification of Letters Patent No. 13,374, dated July 31, 1855.

To all whom it may concern Be it known that I, SAMUEL A. BRIGGS, of Providence, in the county of Providence and State of Rhode Island, have invented a new and useful or Improved Hot-Air Furnace; and I do hereby declare that the same is fully described and represented in the following specification and the accompanying drawings, letters, figures, and references thereof.

Of these drawings, Figure 1, denotes a front end view of my improved furnace as it appears with its external door thrown open; Fig. 2, is a side elevation of its radiator and fire-place. Fig. 3 is a central vertical, and longitudinal section of it.

In constructing my improved hot air furnace, I extend horizontally from a fire-place or chamber, A, a long radiating or smoke chamber B, and I place concentrically or axially within the same, and at some distance from it another radiating chamber, C, which I provide at or near the fire place with an induction air pipe D, made to lead from the hot air chamber E, through the bottom of the outer radiator and through the space F, between the two radiators and into the inner radiator as seen in Fig. 3.

The front end of the inner radiator opens into the hot air chamber or it may be provided with one or more pipes for conducting hot air to one or more apartments.

From the smoke space F, between the two radiators, the smoke and volatile products of combustion may be led by means of one or more pipes, G, leading out of or adjacent to that end of it which is farthest from the fire-place-and into other radiators if desirable to have such.

The front end of the inner radiator or drum is closed, as seen at a, and such radiator is made to project into the fire chamber and over the grate so that the flame of the fire may strike against its under surface in rear of the pipe D. It will also impinge against the end a, which makes part of the boundary of the fire or flame chamber of the furnace.

H, is the grate and I, is the ash pit of the furnace. The front part, b, of the fuel space of the said fire place may be made to turn upward on hinges 0, like a common door, and for convenience of removing clinkers or coals from the fire grate. The ash pit and fire place doors are seen at K, and L, those having a chamber M, arranged in front of them and the fire-place and ash pit. This chamber is furnished with a door N, having one or more air induction orifices 0, 0, 0, made in its lower part. Opening out of the upper part of the chamber M, is apassage R, which forms acommunication between the chamber M, and the main hot air chamber E. This passage is provided with a damper or hinged cover 8, from which a crank T, projects downward as seen by dotted lines in Fig. 3, and is jointed to a sliding rod U, which extends horizontally through the door frame V, and so as to rest against the door N when it is closedthe damper under such circumstances being elevated as seen by dotted lines in Fig. 3.

hen the door N, is opened, the damper by its own weight will fall down and close the passage R. The act of closing the door will press the slide U, inward and raise the damper. All, or a greater portion of the heat radiated from the front of the fire place and ash pit doors into the chamber in front of them will be absorbed by the current of air passing up through such chamber and will be carried by such into the main hot air chamber from whence it will be distributed by the air pipes leading therefrom to different apartments to be warmed.

The chamber M, not only serves to save heat, but to prevent its radiation into the room or apartmentfrom which the door N, separates the chamber M.

The above described air heating apparatus or furnace is very simple in its construction, and efficient in operation. The axis of its main and secondary radiator being disposed horizontally renders the action of the heat or its absorption by the radiators very great and advantageous. The current of air proceeding through the inner radiator instead of being carried into the main hot air chamber may be led by a pipe directly into any room to be warmed, while other rooms may be heated from pipes leading out of the top of the main hot air chamber. This insures a better or more equal distribution of the heated air than when it is all taken directly from the top of the hot air chamber. This furnace presents an important advantage in this respect over most if not all others. The arrangement of the inner radiator with respect to the fire place and so that the flame and smoke can impinge against one end of it, as well as around its outer surface is important. Projecting the inner radiator in other respects as it not only absorbs heat and radiates it into the air passing through it but it deflects the flame against the inner radiator and toward its closed end.

I claim The passage R leading from the chamber M, to the hot air chamber E, in combination with the damper S, crank T, and rod U, operated in manner as described and for. the purpose as specified.

In testimony whereof I have hereunto set my signature this seventeenth day of February, A. D. 1855.

SAMUEL A. BRIGGS.

Witnesses:

E. W. HOWARD, FRANCIS E. HOPPIN.

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