US1268037A - Furnace. - Google Patents

Description

WILLIAM E. MILDNEB AND LEE WEBSTER, OF LOS ANGELES, CALIFORNIA.

' summon.

Specification of Letters Patent.

, To all whom it may concern."

Be it known that we, \VILLIAM E. MILD- NER and LEE \Vncsrnn, citizens of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have jointly invented a new and useful Improvement in Furnaces, of which the following is a specification.

Our invention relates to the design and construction of a furnace in which we are able to secure perfect combustion of all the fuel and through perfect combustion we are able to entirely eliminate smoke and the loss of fuel which smoke represents. These and other beneficial results are attained by the means illustrated in the accompanying drawings, in which:

Figure 1, is a perspective of a furnace embodying our new and novel features parts being broken away to show the interior of the device. Fig. 2, is an enlarged transverse section of a portion of the combustion chamber of said furnace.

In each of the views like characters indicate like parts and referring to the details of construction, 3 is the body of the furnace. This may be masonry, metal lined with fire resisting material or any combination of metal and masonry according to the special requirements of each case. The shape and design of the furnace are also to be modified to suit individual requirements, the furnace shown in. the drawings being merely a conventional form serving best to illustrate our invention. 4:, is a combustion chamber of ordinary construction. 5 and 6 are air ducts extending longitudinally through the combustion chamber. The walls of these ducts are made of metal or other substance which will readily serve as a conductor of heat. These fiues have inlets through the exterior walls of the furnace. When the furnace is in operation these ducts, subjected to the high temperature of the combustion chamber and the close proximity of the fire, become very hot and air passing through these ducts from the exterior of the furnace to the distributing pipe 7 absorbs the heat radiated from the walls of the ducts and passes out through the slot 9 in the pipe 7 at a very high temperature. 10 is a damper for regulatlng the flow of superheated air passing through the ducts 5 and 6 by by-passing all or a portion through the pipe 11. 8 indicates the grate supporting the fuel during combustion. 12

'in the doors are closed and the air is a handle by means of which the damper 10 is moved. This handle projects through the wall of the furnace.

The operation of the furnace is briefly dcscribed as follows: The fuel is placed on the grate and ignited after the usual manner. Air necessary to start vigorous combustion is admitted through vents in the doors of the furnace. The damper 10 is used to close the pipe 11 in the air ducts. WVhen sufiicient time has elapsed to heat up the furnace and particularly the air ducts 5 and 6, the vents necessary to supply oxygen to maintain combustion is supplied from the pipe 7. This air, as before stated, has been superheated in passing through the ducts 5 and 6 and in this condition greatly facilitates the ignition of the gases escaping from the fuel and also the floating particles of carbon which in the presence of a draft of cold air, would chill and pass out as smoke, instead of igniting and adding their value to the other heat units produced. In order to secure most satisfactory results and highest efficiency it is found desirable to regulate the amount of superheated air passing over the fuel on the grate.

By opening the damper 10 any desired portion of the air from the ducts 5 and 6 is permitted to escape directly into the combustionchamber back of the fire, igniting the escaping gases, thence carbon-oxid passing into the flue and the atmosphere outside the furnace.

The suction produced by the burned gases escaping from the chimney furnishes the draft which draws in the air through the ducts 5 and 6 and pipe 7. The course taken by the air is shown by small arrows in the figures in the drawings.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

In a furnace having a fire box and grate, the combination with a combustion chamber, of air ducts extending longitudinally of said chamber at the sides thereof and having the rear ends thereof open to the atmosphere through the rear wall of the furnace, and the other ends extending downwardly across the ends of the fire box and over the ends of the grate and terminating at the outer edge of the grate, and a distributing pipe extending across said outer edge of the grate and having the ends thereof in Patented May as, 1L9l8. 1

communication With the ducts, said pipe being provided with a longitudinal slot for discharging ali rover the fuel on the grate,-

a pipe connected. with each of said ducts at the downwardly deflected portion thereof and adjacent to the horizontal portion, and on the "side-bf t the grate-opposite to *thedi'stributing pipe, for discharging airinto the combustion chamber behind the burning fuel, and dampers ,pivotally mounted at the point here the pipes discharging behind the grate communicate withthedownwardly extending portions of the ducts, said. dampers when closed providing substan- "'tia 1ly continuous Wall members for the ducts first named, and When in open position deflecting a portion of the incoming air to the pipes discharging air behind the grate.

WVILLIAM E. MILDNER. I LEE \VEBSTER.

Witnesses:

'JE NIE B. PARKER,

PHIL .RAGINE.

Copies of this patent may be obtained for fivecentsieaeh, by addressing" the Commissioner of Patents,

Washington, D. G.

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