US365772A - Furnace - Google Patents

Description

UNITED STATES ABSALOM BAOKUS, Jn,

PATENT OFFICE.

or DETROIT, MICHIGAN.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 365,772, dated July 5, 1887.

Application filed March 28, .1887.

To all whom it may concern:

Be it known that I, ABsALoM BACKUS, J12, a citizen of the United States, residing at Detroit, in the county of WVayne and State of Michigan, have invented certain new and useful Improvements in Furnaces; and I (lo declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relatcs'to the construction of a furnace for generating steam and like purposes, the object of which is to so construct thefurnace that the products of combustion shall be properly and sufficiently consumed, thereby saving a large portion of fuel which is lost as furnaces are now constructed; also avoiding the smoke nuisance, which is the result of improperlyconstructed furnaces, al-

lowing the volatile particles'of combustion to escape in the form of gases and carbonic acid, smoke, or soot, all of which results from iniproper construction, manner of feeding the fuel, and a lack of proper draft or introduction of air to properly aid combustion.

'These objections are effectually overcome by my present invention, which consists in the organization or construction of parls, as hereinafter fully set forth, and pointed out particularly in the claims.

In the drawings, forming a part of the specification, Figure 1 is a front perspective of a furnace containing my invention, having the iron front below the boiler broken away. Fig. 2 is a vertical central section taken on dotted line m w of Fig. 1 and looking toward the left, the iron front not being broken away, as in Fig. 1.

B in the drawings represents the boiler; B, the brick-work; D, the bridge-wall; t, the top of said wall, and f the sloping front to said wall.

G is a dumpinggrate, which I locate along the incline of the bridgewall at the bottom of the incline. (See Fig. 2.) The rear edge of the dumping-grate is provided with pivot-bearings a, with a depending arm, t,

which has a pivotal connection with the ver- Serial No. 232.657. (No model.)

tical bar 0. The bar 0 has a pivotal connec tion with the anchor-arm a, secured to the bridge-wall.

r is a rod, which I pivotally attach to the joining ends of the arm t of the dumping-grate and the bar 0, as shown in Fig. 2.

O is a transverse bar having its ends anchored in the side walls, S S, of the furnace. This bar supports the rear endsof the gratebars Z. The upper faces of the grate-bars are located on a horizontal plane with the upper face of the dumpingau incline, as shown in Fig. 2, the front ends of the grate-bars being lower than the rear ends.

0 is a cross-bar supporting the front of the grate-bars. lts ends are anchored in the side walls, S S, ofthe furnace, and it is supported at the center by the central or dividing wall, 0, which extends from the bottom of the ashpit upward, meeting and supporting thejoining sides of the arched walls A A, as shown in Fig. 2. The opposite sides of the arched walls areanchored to the side walls of the furnace.

F represents the common iron front of a furnace, having the usualfeed-door, F, and doors N to ash-pit. The supporting-bar O, I locate back of the iron front about ten inches. The grate-bars Z project forward of said bar 0 and meet the inner face of the iron frame F, as shown in Fig. 2. The front end, E, of the central wall stands on a vertical line with the front face of the supporting bar 0. (See Fig. 2.)

P represents a pillar or support, which I form of a single layer of fire-brick, and locate it in front of the front end, E, of the central wall, 0. Its upper end supports the arches A A at the front, as shown in Fig. 1, and stands flush with the back inner face of the front, as shown in Fig. 2. This construction forms a vertical chamber, H, leading from the bottom of the ash-pit to the point of juncture of the arches. This is an air-induct for feeding the flames under each arch or to the retorts It R. The inner faces of the side walls, S S, terminate at the front on a line with the central wall, 0, and I locate in front of such terminations the single brick pillars orsupports P P, the front faces of which also meet the back face of the iron front F. This construction forms air inducts or fines H H in the sides of the furnace,

grate G, both standing on first shoves the burning products back on the leading from the bottom of the ash-pit m to the under face of the arches A A, and atthe. front ends. These I also employ for admitting common feed-doors F, the coal or fuel when placed on the grates should lie back of the bar 0, supporting the grates; or, in other words, that portion of the grates projecting forward of said bar should be left clear, so as to allow the air to freely pass up at the front and into the retorts at the front ends. When the furnace has been charged with fuel the feed-doors are to be closed. The furnace or retorts It R are supplied freely with air through the open spaces at the front ends of the grate-bars and through the air-inducts II 1-1 H. The air passes upward from the ash-pit, and the draft may be regulated by the doors N at the ash-pit. To replenish the fuel, the operator grates and charges the retorts, as before. The length of the arches A A and the central wall, 0, is about two-thirds the length of the gratebars. The intense or incandescent heat is at the rear ends of the arches under the boiler; and as the upper walls of the arches are on a horizontal line, locating the rear ends of the gratebars higher than the front ends narrows the discharge at the rear ends of the rctorts R R and enables me to locate the dumping-grate nearer the boiler, thus making the rear end of the furnace more shallow,land bringing the flames nearer the shell of the boiler, where they belong; and as Igive the front upper face of the bridge-wall the incline f the flames are gradually'and withoutinterruption brought against the shell of the boiler, thereby rapidly generating steam.

Having thus fully set forth my invention, WhatI claim as new, and desire to secure by Letters Patent, is l 1.. In a furnace, the combination of the side walls, the central wall, thearchcd walls j oining said central and side walls, a set of grate-bars located under each arched wall, the furnacefront having feed-openings above the gratebars, and the central and side air-fines leading from below the grate-bars into the front end of the retorts, substantially as and for the purposes specified.

2. In aifurnace, and in combination, the side walls, the boiler, the arched walls located horizontally below the boiler, the central wall supporting said arched walls, its front end terminating some distance back from the front of the furnace, the inner face of the side walls having a like termination, forming the airfiucs leading from the ash-pit to the arched walls A, the set of grate-bars located below each arched wall upon transverse supports, so as to bring the rear ends of the grate-bars on a higher plane than the forward ends, the furnace-front having feed-doors opening into the retorts, and doors openingiuto the ash-pit, as and for the purposes specified.

3. In a furnace, the combination of theboiler, the side walls having the air-flues H H, the

arched walls located horizontally below the boiler, the central wall supporting said arched walls, its front end terminating some distance back of the furnace-front, forming the central airflue, the set of grate-bars located below each arched wall upon the transverse bars, as

specified, the bridge-wall having the rear-- wardly-inclincd front, the dumping-grate and mechanism for operating said dumping-grate, the furnace-front,and supportsP P P, meeting the inner face of said front, as and for thepurposcsspecified.

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

ABSALOM BACKUS, JR.

Witnesses:

It.v B. WHEEL R, B. F. WHEELER.

Images