US486704A - James scott ecker - Google Patents

Description

2 Sheets-Sheet 1. J. S. ECKBR.

(No Model.)

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(No Model.)

FURNAGE.

No. 486,704. Patented Nov. 22, 1892.

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UNITED STATES PATENT OFFICE.

JAMES SCOTT EOKER, OF PORTLAND, OREGON, ASSIGNOR OF FIVE-EIGHTHS TO JOHN S. LAIDLAW AND JAMES LAIDLAW, OF SAME PLACE.

FU RNACE.

SPECIFICATION forming part of Letters Patent No. 486,704, dated November 22, 1892.

Application tiled June 18, 1892.

To @ZZ whom it may concern:

Be it known that I, JAMESYSCOTT EcKER, of Portland, in the county of Multnomah and State of Oregon, have invented a new and Improved Furnace, of which the following is a full, clear, and exact description.

The object of the invention is to provide a newand improved furnace for steam-boilers and for other purposes, and which is simple and durable in construction and arranged to utilize the fuel to the fullest advantage.

The invention consists of an air-heating chamber arranged in the rear of the bridgewall and connected by ports with a transverse channel formed in the bridge-wall, the said channel leading to channels in the side walls of the furnace. The top of the said chamber is flush at its front with the upper edge of bridge-wall and extends under the rear part of the boiler and is curved concentrically to the latter to form a radiating-channel and colnbustion-chamber.

The invention also consists of certain parts and details and combinations of the same, as will be hereinafter described,and then pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specilication, in which similar letters of reference indicate corresponding parts in all the figures. Figure 1 is a sectional side elevation of the improvement on the line 1 1 of Fig. 2. Fig. 2' is a sectional plan view of the same on the line 2 2 of Fig. l, with one of the boilers removed. Fig. 3 is a transverse section of the improvement on the line 3 3 of Fig. l, parts being shown in elevation, and Fig. 4 is a transverse section of the same on the line 4 4 of Fig. 1.

As illustrated in the drawings, the furnace is built for two steamboilers, but it may be arranged for a single boiler, or for other devices to be heated. The furnace proper is provided with the usual brickwork A, in which are set the boilers B, extending l0ngitudinally and extending near their front ends into the fire-box C, provided with the usual grate D, ash-pit, and doors, of any approved construction.k The rear end of the grate D connects with the bridge-wall E, in the rear of which is formed an air-chamber F, extendvWork to the other side Wall.

Serial No. 437,169. (No model.)

ing between the said bridge-wall E and the rear end A of the brickwork A, and also extending from one side Wall A2 of the brick- Into the front end of this air-chamber F leads a series of longitudinally-arranged ports G', opening into a transverse channel G, formed in the bridgewall E, the ends of the said channel G connecting with longitudinally-extending channels H, formed in the side walls A2 of the brickwork A. The channels H open at their front ends to thel air, so that the latter can pass through the channels I-I and G and ports G into the air-chamber F. The top I of the chamber F is flush at its front end with the top edge of the bridge-wall E and vextends to the end wall A and the side walls A2, the under side of this top I being formed with an arch I, and an inverted arch I2 forms the top surface of the said top I, and this inverted arch I2 is concentricwith the boiler B, so as to form a segmental space J, which consists of a combustion and radiation chamber for the boiler B, as will be seen by reference to Fig. 4. The top E of the 'bridge-Wall E lslants upwardly and rearwardly, as shown in Fig. 1, and is curved to correspond with the curved top surface or arch I2 of the top I, as will be readily understood by reference to the said Fig. l. In the top I, and passing through the arches I and I2, are arranged a series of openings or ports I3, establishing communicationbetween the chamber F and the chamber J. It will be seen that this top I for the chamber F is built of alarge amount of brick, so as to form a storage-chamber for the heat arising, as hereinafter more fully described. 'Suitable doors K are arranged in the rear wall A of the brickwork A, to give ready access to the air-chamber F in order to clean the same whenever necessary. Similar doors L are also arranged in the said end wall A and lead to the top surface of the top I, to clean the combustion-chamber whenever required.

The operation is as follows: The fuel burning on the grate D in the tire-box C generates heat, which passes over the inclined curved top E of the 'bridge-wall E, to and through the chamber J, around part of the boiler B, and this heat, consisting of smoke and gases, comes in contact and mixes with IOO the pure air passing upward through the openings I3 from the air-chamber F. This additional supply of air for the smoke and gases causes combustion of the saine, so that all the smoke is consumed before it passes to the rear end of the boiler B and through the fines of the same to the chimney. Furthermore, the heat generated by this second com bustion heats the top I of the air-chamber F, so that a considerable amount of heat is stored in this top I, and by the peculiar construction of the inverted arch I2 the heat thus stored is radiated out the boilerl through the chamber J, whereby the said boileris heated uniformly and perfectly, at the same time using the fuel to the greatest and fullest advantage.

In constructing the top I it is preferably built loosely of suitable brick without clay or mortar, so as to allow for expansion and contraction without injury tothe walls. As before mentioned, a large body of brickwork thus forms the top I and has considerable storage capacity for heat utilized, as before described.

By making the top surface of the top I concentric to the boiler B a perfect radiator is formed, so as to equalize the heat throughout the entire length of the boiler or other object to be heated, thus insuringa regular and uniform expansion and relieving the heated object of the unequal strain of expansion at one point and contraction at another, thereby securing perfect circulation of f Water in the boiler and preventing the formation of scale or sediment therein. It will further be seen that by the peculiar construction a perfect combustion-furnace is formed, as the air is taken into the air-chamber under the heated top I through the hollow bridge-wall provided with the ports,as described. As the airis taken into the bridge-Wall channel from some point in the side walls A2 of the brickwork A, and most convenient for the firemen to regulate the amount by a suitable damper, (not shown,) the How of air can be regulated. according to the amount of fuel used in the lire-box C.

It will be seen that direct connection is made with the outside, so as to prevent the air from circulating through the bricks in the walls and thus becoming heated, as experience teaches that air so heated becomes detrimental to combustion, as the oxygen has been consumed in the walls before reaching the coinbustion-ohamber. 'Vith my arrangement the air in its pure state is introduced into the airchalnber under its arch top and is circulated through the openings I3 to the top inverted surface, for the purpose previously described. As pure oxygen is contained in the air thus introduced into the combustion-chamber J, a perfect combustion will take place with the gases coming from the fire-box C.

It is understood that the large amount of brickwork in the top of the air-chamber F and the porous nature of the brick naturally absorbs the heat and stores it until ready for use in heating the boiler. The surface of the perforated inverted top with air passing through openings makes a perfect radiator-and with the combustion of oxygen delivered from the air-chamber and the gases from the gratesurface, combustion is complete and the result is a clean boiler and clean'fiues.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- A furnace comprising the brickwork A, the fire-chamber C in the front end thereof, the ash-pit therebelow, the curved bridge-Wall E, having its top E inclined upwardly and rearwardly from the grate and having a transverse channel G communicating with the outer air through passages II, leading through the side walls to the furnace-front, a chamber F between the bridge-wall and rear end of the brickwork A and formed of brickwork with an arched top I and an inverted arched radiating-surface I2, registering at one eud with the rear edge of the curved inclined top E', openings G', con necti ng the chamber F and passage G, and series of vertical openings I3, leading through the top I, substantially as set forth.

JAMES SCOTT ECKER. Witnesses:

Guo. B. RATE, MALCOLM G. SEAGER.

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