US99642A - Liam k - Google Patents

Description

` elicited tant @Hicttdtiitra JONATHAN OONE AND WILLIAM K. KELLY, OF BRISTOL, PENNSYLVANIA.

Lehm Paten; No. 99,642, dated February s, 1870.

/llhe Schedule referred to in these Letters Patent and making part of the same.

To all whom. it may concern y Be it known that we, .JONATHAN OoNE and WIL- LIAM K. KELLY, of Bristol, in the county of Bucks, and 'State of Pennsylvania, have invented certain Improvements .in Furnace Grate-Bars; and we do hereby declare that 'the following is a full, clear, and exact description thereof, reference being had to the annexed drawings, making part of this specification, in which- Figure lis an end elevation of a series of grate-bars 'and of the cradle in which they rest, together with a sectional velevation of the furnace in which they are placed.

Figure 2 is 'a longitudinal vertical section of a bar, showingrtheapertures through the same, the eccentric bearing upon its inner end, and the projection upon its outer end, for the' reception of a crank or lever for rocking the bar.

Figure 3 is a perspective view of a complcterbar, showing the apertures in its upper surface," the truss upon its lower surface, and a different form of projection for rocking the same.

Figure 4 is a sectional elevation on line a a of fig. 3, showing the form of the bar, its truss, and of the apertures through the same.

Figure 5 is a plan or top View of a series of bars, as they appear when placed in a furnace, the dotted lines :showing the cradles upon which they rest.

Corresponding letters denote corresponding .parts in the several figures.

This invention relates to grate-bars for furnaces, upon which coal or other fuel is to be burned.

To furnace-grates, as heretofore constructed, many yobjections exist, among which may be enumerated the great difficulty of removing the olinker therefrom, owing to the fact that when rocked or turned for that purpose, the openings or apertures are constructed, so that as the clinker enters, it is prevented from falling down through, and when rocked in the opposite direction, the bars are lifted out of their places, and coal is wasted as a consequence.

Our object in the present invention is to provide a remedy for the above-recited objection, and others not enumerated; and to this end,

-It consists in providing a grate which has upon its under side two bearing-surfaces, which are eccentric to its axis, which, in this instance, is supposed to be a light line drawn longitudinally through the bar, and connecting the centres of the largest circles that could be inscribed in vertical sections ofthe bar, at the points where it rests upon the cradle, such circles to touch those points; and, further,fin providing a flange upon the inner end of i'nrnace-grates, to prevent their being moved `longitudinally while being rocked; and, further, in providing a furnace-grate, having an eccentric bearing-surface, as described, in combination with acradle, having dat surfaces for the eccentric portions of the grate to rest upon; and, further, in providing suitable projections upon the bars, to which to apply a lever or wrench, for rocking said bars, all as will be more fully described hereinafter. Y

To enable those skilled in the art to make and use our invention, we will proceed to describe its construction and-operation.

` A, in the drawings, refers to a grate-bar for furnaces, upon which fuel is to be burned. The form of this grate-bar will be seenby referring to figs, 1, 2, and 3, of the drawings, it being designed to be made of castmetal, with an -elliptical upper surface, and having a truss formation, A', upon its lower surface.

To the upper overhanging portions upon each side of the trussed portion there are to be formed a series of apertures, E E, of, say,`one inch in length,'more or less, the upper surface of which is smal-ler than the parts below it, so that any clinker or piece of -coal which will enter at the top will readily pass out at the bottom.. 'Ihese openings serve both as a passage for the discharge of ashes and for the passage of air in jets to theburuing fuel.

The truss formation upon the under side of the grate does not extend throughout its entire'leugth, a` suiiicient space being left upon each end, upon which to form the eccentric journal or bearing-surface D, as

shown in figs. 1 and 2.

.The object of making the above referred to journal eccentric to the axis of thel grate, is to increase the width of the spaces between the bar, which is being rocked, and those which are next toit, and to prevent the rocking grate from being lifted out of the cradle, while being rocked.

Another advantage arising from this form of journal v is, that any clinker or clinkers which may pass into the spaces between the'grates, when they are turned or rocked out of their normal position, will be crushed when they are turned in the opposite direction, and thus so reduced in size as to fall readily into the ashpit, without danger of their clogging the lower portions ofthe grates.

Upon the outer'ends of the bars which constitute the grate, there is to be formed aprojection, O, which may be upon the extreme end of the grate, asshown in figs. 2 and 5, when the grate is placed on a level with the lower edges of the furnace-doors, or upon thelower side of the grate, as shown in iig. 3, when it becomes necessary to place them above such level. These bars rest/in recesses formed incradles B, which may consist of castings, which in turn may rest upon the brickwork of the furnace, or upon projections upon the plates, when iron is used for such furnaces. The form of vthese cradles is clearly shown in tig. l of the draw ings, upon reference to which it will be seen that that' portion upon which the bar rests is flat or horizontal, while a portion of the other surface is vertical, and a portion bevelled, which constructionhas been found to be necessary, in order to keep the bar from being lifted out of such recess. There are to be two of these crz'idles, one at each end of the bars.

Upon the inner ends of the oars A, or upon the end of the journal attached thereto, there is to he formed a downwardly-projeeting flange, F, which will pass down over the edge of the cradle, and eiectnallyprevent the longitudinal movement of the bars while being' rocked. 4

By reference to figs. 3 and 5,-it will be seen that between th'e spaces in the upper elliptical surface of each har there is a continuous smooth surface, Which form of construction admits of the slice or scraper being run under the fuel, for the purpose of removing the ashes, or for anyy other purpose, Without being obstructed by any roughened surface, so that the opera-` `What'we claim,and desire to secure by Letters Pat-v ent, is-

1. Arocking grate for steam-generator and other furnaces, having its journals, or the points where it rests upon its supports, 'eccentric to its axis, substantially as and furthe purpose set forth.

2. A furnace-grate, havin/g an elliptical upper surface and a bearing-surface eccentric to its axis, substantially as and for the purpose set forth.-

3. The flange F, upon the inner end of thebar A,

ubstantially as and for the purpose set forth.

4. lhe combination of the cradle B, and the eccentrie journal upon theend of the har A, substantially as apd for the purpose set forth.

5. A grate-bar, having an elliptical upper surface,

in which there Yare two series of apertures parallel to eachother, and an eccentric bearing-surface, and a projection at or near its end, for rocking said bar, all substantially as and for the purpose specified.

In testimony whereof, We have signed our names to 'this specification, in the presence of two subscribing witnesses.

J. GONE. s Y WM. K. KELLX.

Witnesses:

B. EDW. J. Eins,

A. RUPPERT.

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