US407873A - Furnace-grate - Google Patents

Description

' (No Model.)

M. H. MOSKOVITS.

FURNACE GRATE.

Patented July 30, 1889. Fig.1.

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UNITE STATES ATENT QFFICE.

MAXIMILIAN H. MOSKOVITS, OF KANSAS CITY, MISSOURI.

FU RNACE-G RATE.

SPECIFICATION forming part of Letters Patent No. 407,873, dated July 30, 1889.

Application filed January 29, 1-889 Serial No. 297,908. (No model.)

To (LZZ whom it may concern.-

Be it known that I, MAXIMILIAN H. MosKowas, of Kansas City, Jackson county, Missouri, have invented certain new and useful Improvements in Furnace-Grates, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to an improvement upon Patent No. 382,104, granted to me May 1 1, 1888; and it consists in the novel construction and combination of the various parts, as will be more fully hereinafter specified.

In the drawings forming part of this specification, Figure 1 is a plan View of my im proved grate. Fig. 2 is a front view of the same. Fig. 3 is a side view. Figeis atransverse section of one of the grate-bars, taken on the line 00 0c of Fig. 1; and Fig. 5 is a detail view of the bearing.

Referring to the drawings, in which similar letters of reference indicate corresponding parts, A indicates one of my improved gratebars, which consists of a series of parallel zigzag webs c 0, (usually three in number,) united at their ends with a web or end piece 0, and braced at suitable intermediate points by the connecting ribs or webs b, and a straight longitudinal supporting-web a, cast integral with the under side of upper part at about the middle of the same and extending its e11- tire length. The web a is connected with the central zigzag web 0 by the connecting-pieces a, by which construction a series of holes or apertures h h are formed, through which air may be fed to the fuel upon the grate-bar. To prevent the accumulation of ashes, clinkers, and the like upon the web a, I bevel or cut away the same, as shown at Z, Figs. 2 and 4., and I usually alternate such beveled parts, as most clearly shown in Fig. 2.

From the foregoing it will be seen that a grate-bar is formed which can be more cheaply and easily constructed, and one which can be very quickly arranged in conjunction with the adjacent bars to form a complete grate.

The advantages of this construction over that shown in my Patent No. 382,10-1t are that only one supporting-web is necessary for three zigzag webs composinga comparatively large fire-surface. I-Ieretofore the zigzag webs of grates have been made comparatively thick and heavy in transverse section, preventing the use of any great number of them in making up a fire-surface. This of course has also operated toreduce the air-space? and hinder combustion to a corresponding degree. In my improved grate a large fire-surface is provided by employing a minimum weight of iron, having ample air-space, and yet its airopenings are sufliciently small to prevent'dropping of fuel to the ash-pit. Thus it is that a fire-surface of a given area is provided with only one-third of the number of supporting-webs, and hence one-third less obstruction is oifered tothe upward passage of air. Further, much less obstruction is offered to ashes and clinkers falling through the grate, and the improved construction, taken as a whole, resulting in better combustion of fuel, decreased necessity for stirring the fire, and slight danger of burning the grate, which last fact is self -evident,- as the quantity of iron to be kept cool is comparatively small and the air-space provided is proportionately large. The small amount of iron required is perhaps best illustrated by the fact that in the older grates (where a supporting-web is provided for every zigzag web) the supporting-webs were only about one and one-half inch apart, while in the present case they are separated fully four inches. In other words, a grate-surface of a given area now requires but one-third as many supporting-webs as have heretofore been necessary.

The grate-bars A A are supported at each end upon a knife-edge bearing G, each bearing G working in an angular recess 9, formed in the under side of the end web-pieces c c. It is of course obvious that the several bars may be provided with any other suitable form of end journals or bearings that will permit of imparting to them a rocking movement.

The knife-edge bearings G G are formed upon the upper sides of the supporting bars or beams O G. Said bars, running parallel with the side walls of the fire-box and extending the entire length of the same, are securely held at their rear ends in the bridgewall H, as clearly shown in Fig. 3. WVhenever it is deemed necessary, these supporting-bars C C may be braced by a cross-rod cl and suitable nuts d.

At a short distance forward of the bridgewall H the bars 0 C are provided with an upwardly-extendin g portion, to which secured the rigid zigzag grate-bar B, which forms the extreme rear end of the grate.

To operate the rocking grate-bars, I employ a rod E or E, said rod being secured at its rear end between the 'Vertically-depending lugs or ears 9 g, formed upon the under side of the web a, and at its front end this rod is pivotally connected with an operating-lever D or D at c, said levers being fulcrumed between the lugs 1c of the plate f. Of course, however, the operating-levers may as well be pivoted to the front plate of the furnace, which would not change the operation and results. The rod E is usually connected with the front grate-bars, while the rod E is connected with the rear grate-bars. By this arrangement I am enabled to operate one section of the grate either independently pf or in conjunction with the other section, asmay be desired.

The operation of my device is as follows: The fuel being fed in the usual manner, the combustion is more complete at the rear part of the grate, and the fuel will burn away more rapidly. By operating the lever D the front bars of the grate are rocked, feeding the fresh fuel to the rear of the grate. The air, entering the fire-box as usual, passes along under the grate and through the zigzag openings formed between the zigzag webs c c. The Webs a a, being perforated at h, allow the air to pass freely through the fire-box and up through the grate. Whenever it is desired to shake the grate, the levers D and D are operated simultaneously, and the grate is cleared of all ashes, clinkers, and the like. The web a, being beveled, as shown and described, prevents the ashes and clinkers from accumulating upon the same, as is commonly the case in other grate-bars. I

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

l. The improved grate-bar havingan upper fire-surface composed of a series of zigzag webs c c, which are united at their ends, the end web-pieces c c, and the lower straight longitudinal supporting-web cast integral with the upper zigzag webs and the end pieces, said supporting-web being connected .with the series of zigzag webs by means of connecting-pieces 0., whereby a series of airpassages h h are formed between said upper series of webs and the said supporting-web, substantially as described.

2. The improved grate-bar having an upper fire-surface composed of a series of zigzag webs c c, which are braced at points intermediate of their lengths by short transverse webs b b and united at their ends, the end web-pieces c c, and the lower straight longitudinal supporting-web cast integral with the upper zigzag webs and the end pieces, said supporting-web being connected with the series of zigzag webs by means of connectingpieces a, whereby a series of air-passages h h are formed between said upper series of webs and the supporting-web, substantially as described.

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

MAXIMILIAN H. MOSKOVITS,

WVitnesses:

F. G. FISCHER, A. A. HIGDON.

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