US402795A - Air-heating furnace - Google Patents

Description

(No Model.) 4 Sheets-Sheet 1.

J. R. BARKER. AIR HEATING FURNACE No. 402,795. Patented May 7, 1889.

N4 PETERS, Phnlo-Lnmgra fiar, Wnshinglan. D.(l

(No Model. 4 SheetsSheet 3. J. R. BARKER. AIR HEATING FURNACE.

Patented May 7, 1889.

(No Model.) 4 SheetsfSheet 4.

J. R. BARKER. AIR HEATING FURNACE.

No. 402,795. Patented May 7, 1889 N PETERS. Phoio-Llllwgnpher. Wi hKnglum Dv C- UNITED STATES ATENT OFFICE.

JOHN R. BARKER, OF CHICAGO, ILLINOIS.

AIR-HEATING FURNACE.

SPECIFICATION forming part of Letters Patent No. 402,795, dated May 7, 1889.

Application filed November 27, 1888. Serial No. 292,039- (No model-l To all whom it 12mg concern:

- the furnace for which Letters Patent of the United States were granted to me on May 28, 1872, being No. 127,140, and on September 22, 1885, being No. 326,541; and it has for its object to provide certain improvements thereto; and my invention consists of the novel devices and combinations of devices hereinafter described and specifically claimed.

In the accompanying drawings, Figure 1 represents a longitudinal vertical section, and Fig. 2 a transverse vertical section, through the center of the furnace. Fig. 3 is a sec tional plan on line 3 3 in Fig. 1, and Fig. 4 is a sectional plan 011 line 4 4 in Fig. 1. Fig. 5 represents an elevation of the furnace, the outer shells or casing being removed, and Fig. 6 shows a plan of the water-receptacle detached.

Corresponding letters of reference in the several figures of the drawings designate like parts.

A denotes the base of the furnace, also providing the bottom for the ash-pit B, having door a. The ash-pit casting B supports the fire-pot C, and below this fire-pot the grate D, having shaker-arm b, is pivoted upon a dump-frame, 0, having trunnions to its rear that rest in U-shaped brackets d, forming part of the ash-pit casting,while its forwardlyprojecting arm is supported by a swinging bolt, 6, that can be swung to clear such arm and allow the grate to be lowered for removing the clinkers in the ordinary well-known manner. Upon the upper grooved edge of the fire-pot C is placed a ring-chamber, R, made in halves bolted together and provided with an air-inlet opening, f, an d with a series of internal vents, g, that will admit atmospheric air to enter in small jets and mix with the gases generated from the fuel to make them combustible, and thereby utilize the same and economize fuel. Upon this ring-chamber R is fitted the somewhat conical combustionchamber composed of sections E, F, and G, the sections E and F also providing the fuel-feed channel h with fuel-door 2', and the section F having cast a series of elbow-shaped gas-outlet extensions, j, communicating with nozzles K, forming part of section F. The uppermost section, G, is cylindrical, and is closed on top by a concaved circular plate, Z.

An upper ring-shaped chamber, H, has a series of downwardly-projecting nozzles, m, connecting with the nozzles is of combustionchamber section E for supporting chamber H and for providing a series of communicating flues between the combustion-chamber and ring-shaped chamber H, and between this chamber H and another ring-shaped chamber, I, placed to surround the fire-pot C, is provided communication. through a series of pipes, J, one for each two fiues, K m. The ring I. has a thimble, a, projected through the casing and provided with a nozzle for connecting smoke-pipe K, and also provided at its end with a door, 0, arranged to be adjustably opened for admitting air to check the draft of the furnace, if desirable. This smokepipe K is also connected with a thimble, 19, forming part of ring-chamber H to afford communication therewith and to let the gases escape direct from such upper ring-chamber, H, whenever it is desirable to produce a strong draft, and this thimble p is provided with a damper, q, which with closing will cause the gases to circulate through the lower ringchamber, I. The upper ring-chamber, H, is also pierced by a series of vertical flues, r, for air to be heated to rise through the same.

Upon standard lugs s forming part of ribs tof base A is placed the horseshoe-shaped water-receptacle M, having a pipe tapped into one side, which pipe extends through the easing, where a spout-casting, Q, is connected thereto provided with a cover for feeding water into such receptacle, which water will evaporate into the air passing through the furnace to be heated therein for impregnating such air with the required moisture to make it heathful.

This furnace is incased with galvanized sheet-metal shell N, made in cylindrical sec tions connected by cast-metal rings r and closed 011 top by a crown-sheet, 10, which is to be provided with openings for the hot-air-eonducting pipe, to be connected therewith in the usual manner, and inside of shell N another cylindrical shell, 1?, is supported on hooks m, secured to one of the rings 1*, for retaining the heat in the furnace and for preventing the outer shell from becoming heated.

-\Vhat I claim is- 1. In an air-heating furnace, the combination, with fire-pot C and colnbustion-chamber composed of the parts E and F, the former being provided with elbow-pipes j and nozzles 71:, extending upward, of the ring-chamber placed on a higher level than the combustionchamher and having downwardly-extending nozzles in, connecting with nozzles 71' to form communicating fines, and the ring-chamber I, surrounding the fire-pot, and the pipes J, connecting the chambers 11 and I, as set forth.

In an air-heating furnace, the combination with fire-pot C and colnbustioil-chamber E F, the former being provided with elbowpipes and nozzles k, of ring-chamber 11,10- cated above the combustion-eha1nbers and pierced with air-circulating tubes r, and provided with nozzles m, to connect with nozzles 70, and of ring-chamber I, surrounding the firepot and communicating with ring-chamber II through pipes J, all substantially as set forth.

The combination with an ash-pit, a firebox, eombustion-chamber, and ring-chambers surrounding said firebox and combustionchamber, of a horseshoe-shaped water-receptacle placed below the ring-chan1bers and partially snrroun ding the ash-pit, and a spoutcasting, Q, on the outside of the furnaceshell, and a pipe connecting the trough M and said casting, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN R. BARKER. \Vitnesses:

\VILLIAM II. Lo'rz, OTTO LUBKERT.

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