US329172A

US329172A - Grate for burning gas in fire-places

Info

Publication number: US329172A
Authority: US
Publication date: 1885-10-27
Anticipated expiration: 1902-10-27

Description

(No Model.)

W. S. J ARBOE.

@RATE FOR BURNING GAS 1N PIRE PLAGES. No. 329,172.

Patented Oct. 27, 1885.

UNTTnn TaTns aTnnT @Trinao ifi/'ALTER S. JARBOE, OF ALLEGHENY CITY, PENNSYLVANIA.

@HATE FOR BURNING GAS iN PERE-PLACES.

SEJEFEGATIQEI forming part of Letters Patent No. 329,172, dated October 27, 1885.

Application filed January 14, 1585. Serial No. 152,837. (No model.)

To @ZZ whom, t may concern:

Be it known that I, WALTER S. JARBOE, of Allegheny City, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Grates for Burning Gas in Fire-Pl aces and Furnaces; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to rire-places, stoves, and furnaces employed in burning natural and other as fuel for heating purposes. This natural gas is obtained through Artesian wells in certain localities, and condutted through pipe-lines to the places where it is utilized, the gas being carried in some ciiibs through the streets and utilized in public buildings and houses for heating purposes to a large extent, and being found an inexpensive fuel. In other localities gas is manufactured for this purpose either at the place where used or inv different parts of the city, and is conducted in the same manner to houses and public buildings for use. The most approved method of burning this gas for heating purposes has been to introduce it into hollow grates or grate-bars, togetherwith air, the air and gas being mixed at the entrance into and within the chamber of these hollow grates or grate bars and rising through holes or perforations in the upper surface of the bar and around the upper edge thereof. The gas is generally conducted to the grate or furnace by means of a small pipe, and then passes throughthe mixingchamber, the chamber being illustrated in Figure 2 of the drawings, and having openings for the admission of air around a tube or nipple, through which the gas enters, the draft of the furnace drawing in the air through the mixing-chamber, and the gas entering through the nipple acting to a certain extent as a siphon. rlhe gas and air rising through the hollow grates are burned within the iirevbox around a mass of broken hre-brick or similar refractory material, which acts both to support combustion within the fire-box by absorbing the heat generated from the combustion of the gaseous fuel and heat` ing the gas and air as they enter the fire-box, and also to radiate the heat generated within the fire-boX through the walls ofthe stove or furnace or into the roomin which it is located. Heretofore this broken fire-brick or similar refractory material has rested directly upon the upper surface of thehollow grates or grate-bars, and,as a consequence, the heat of the refractory material has been imparted to the grate-bars, thus causing them to burn out rapidly, and as the refractory material rested directly on the upper surface of the grate-bars, the holes or perforations therein were closed or clogged by this refractory material, which is liable to crumble, and would cause the iilling up of the perforations, thus preventing an even distribution of the i'lame and heat throughout the fire box or chamber. In many cases where the refractory material has thus rested directly on the grates it has so clogged the perforations therein as to seriousl yim pede the passage of the gas and air and to cause the ilashing of the gas within the mixingchamber, the flame passing out of the mixing-chamber, and in some cases setting fire to the room in which it is used. y

The object of my invention is to overcome these difliculties in connection with the use of these hollow grate-bars; and it consists, essentially, in forming the hollow grate with a flat upper surface, and perforations extending through the body thereof, and providing it with a series of pins or like projections on the upper surface thereof, to support the refractory material employed to hold and refract the heat above the body of the grate, thus preventing the clogging ofthe holes or perforations and forming a continuous chamber or space above the hollow grate, within which the gas and air may circulate before rising through the refractory material, causing a more even distribution of the gas and fiame through the firechamber, and at the same time preventing the rapid burning out of the grate, before referred to.

It also consists in certain improvements in the connections between the mixing-chamber and hollow grate, to allow of the easy removal of the hollow grate to allow of the use of solid fuel where the gas gives out.

In the accompanying drawings, Fig. l is a perspective view of my improved hollow gratebar, showing the form employed in the ordinary grate for fireplaces and stoves. Fig. 2 is a erosssect-ion showing a portion of the fire-place and illustrating the employment of my improved grate. Fig. 3 is a perspective IOO view of the grate employed with furnaces and stoves having circular fire-boxes. Fig. 4 is a side view of the connecting-nipple employed between the mixing chamber and hollow grate, and Fig. 5 is a vertical section of the nipple and mixing-chamber.

Like letters of reference indicate like parts in each.

The grate a is cast to shape, and when employed in the ordinary fire-place is rectangular in shape, corresponding substantially to the size of the fire-place at the base thereof. When employed in furnaces or stoves having circular lire pots or boxes, the grate c is circular in shape, as illustrated in Fig. 3. The grate is hollow, the walls thereof being generally formed about one-fourth of an inch in thickness, and the sides and ends are preferably formed sloping, to allow the gas and air to pass horizontally through the perforations or holes b in the side walls, c, near the top thereof, the top of the grate being flat. Extending through the topor upper surface of the grate are a series of perforations or holes, b, these holes being located at short intervals over the entire surface of the grate-bar, so as to obtain the even distribution of the gas and air rising through the grate bar. Extending up at short intervals on the upper surface of the grate-bar are the pins or projections e, these pins being placed close enough together to form a support for the broken firebrick or other refractory material, f, employed to receive and retain the heat generated from the combustion of the gas and air within the fire chamber or box. pins are about one inch apart and about threefourths of an inch in height, though of course the exact height of or. distance between the pins is not material. The pins are cast with the grate and add but little to the expense of its manufacture.

The gas and air may be conducted into the grate-bar either through the end or, as preferred by me, at the base thereof, as a more even distribution is obtained in this manner. For this purpose the mixing-chamber g is employed at the base of the hollow grate, and the pipeh,leading from the gas-main,is screwed to this mixing-chamber.

Inthe center of the chamber is the jet la, through which the gas passes from the pipec into the chamber, and the chamber has at the base thereof the openings Z, to permit the entrance ofthe air.

Secured to the top of the mixing-'chamber is the nipple m, the upper end, n, of which is cone-shaped, and fits into a correspondinglytapered seat, p, in the hollow grate, thus forming a connection between the mixingchamber and hollow grate. tends up through the bars of the grate, and in case the supply of gas gives out the hollow grate may be lifted off and a cap, e, be placed on the'nipple to prevent the entrance of ashes, tc., when the grate may be employed in the usual way with coal or other solid fuel. The

In an -ordinary grate these' chamber g, and thence into the hollow gratebar, and it circulates within the hollow chamber m of the grate-bar and passes through the perforations b thereof, the gas and air then passing up into the mass of refractory material supported on the grate and forming combustion therein, the required heat being generated in this manner and the refractory material supporting combustion within the lire chamber or box and refracting the heat therefrom into the apartment or through the walls of the stove or furnace. As the refractory material is held above the body of the hollow grate, it is evident that the open space or chamber above the fiat upper surface of the grate and around the pins or projections c causes the more4 perfect circulation of the gas and air before it rises through the mass of refractory material, and in case any ofthe perforations should become clogged prevents the uneven distribution of the gas and air on this account. As, however, the refractory material is all held above thebody of the hollow grate, it is evident that there is' no liability ofthe holes or perforations clogging, as is the case where it rests directly onl the body of the grate. lt is also evident that by the use of these pins or projections the mass of highlyheated refractory material is held above the body of the grate, and consequently all liability of the rapid burning out of the hollow grate is prevented. By the employment of the nipple having cone-shaped upper end and the cap the grate may be changed by the user as desired.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. A hollow grate for burning gaseous fuel, having a flat upper surface,l perforations extending through the same, anda series of pins or projections on its upper surface adapted to hold refractory material above the body of the grate and so form an air-space above and protect the body of the grate from burning out, substantially as set forth.

2. In combination with a hollow perforated grate for burning gaseous fuel, a mixingchamber, and a connecting-nipple fitting within a seat in the hollow burner, substantially as and for the purposes set forth.

3. The combination of the mixing-chamber g, secured to the gas-supply pipe h, the nipple m, secured to the mixing-chamber, and the covering-cap c, substantially as and for the purposes set forth.

In testimony whereof I, the said WALTER S. JARBOE, have hereunto set my hand.

WALTER` S. JARBOE.

Witnesses:

CrrAs. H. TAYLOR, JAMES I. KAY.

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