US292492A - Mflton c - Google Patents

Description

l/ (No Model.) Y l i v Yf, M..G. JONES;

FURNAGE GRATB..

N0.292,492. Patend Jan.29,1l3s4.

- i l Unirse I STATESV PATENT Oratori.v

MILTON C. JONES, OF GREEN ISLAND, NEV YORK.

Fu RN'ACE-GRATE. d

SPECIFICATION forming part ofLetters :Patent N0 292,492, dated January 29, 1884.

` Application filed October 23, 1882. (No model.)

To @ZZ whom t may concern:

Be it known that l, MILTON C. JONES, of Green Island,iin the county of Albany and State of New York, have invented certain new and useful Improvements in Furnace-Grate Bars, of which the following is a specification.

My invention relates to improvements in bars for the grat-es or ire-beds of boiler and other furnaces; and the object of my improvements is to provide furnace-bars that will not become warped and bent out of shape. by the heat generated from a superimposed mass of burning fuel; and to this end my invention consists in securing the forward end of each grate-bar in a fixed position, so' that it cannot be moved bythe expansion and contraction of it, the rear end of each of said bars being fitted to rest in a chambered bearing-bar pro` vided with a series of openings for receiving the grate-bars and maintaining them in p'ositionto resist any tendency to warp and twist, the said chambered bearing-bar being spe cially adapted to permit the grate-bars to expand freely in a lengthwise direction without encountering' any obstruction at their rearmost end, and by so doing I avoid themost frequent cause of warping and bending in grate-bars.

In the accompanying drawings, which form part of this specification, and to which reference is made herein, Figure lis a perspective longitudinal section of a boiler-furnace containing my improvements; Fig. 2, a front elevation of the chambered bearing-ba15-and Figs. 3, 4, and 5 are detached details of an intermediate bearing-bar and a grate-bar adapted to engage over standingears formed on the said bearingbar.

As represented in the drawings, A is the front plate of a furnace; B, the brick-work at sides of furnace, C, the bridge-wall, D, the dead-plate7 at the forward end of the furnace; E, grate-bars; F, the front bearingbar; G, the rear or chambered bearingbar, and H an intermediate bearing-bar.

The front plate, A, brick-work B, and deadplate D may all be constructed in any of the usual and well-known forms for such parts.

The grate-bars E are made of a uniform depth and of a uniform cross-sectional form. At their forward end they have either a curved or angular termination, so that their upper.

ends may fit snugly against the'inner edge of the dead-plate D. Each of said bars has a series of triangular spacing-snags, c, which are formed at each side and, as shown in Fig. 1, near its lower edge. under edge of the bar at the base of the foremost snug e, is adapted to engage on the sharp en ed upper edge ofthe front bearing-bar, F, in such manner that the forward end of each grate-bar will be retained thereby and prevented from being moved by the expansion and "contraction of the bars, which will only affect the barsat the parts lying at'the rear of the front' bearing-bar, F. While I have shown and described only one mode of locking the forward end of said grate-bars to the front bearing-bar, it will be. obvious to any one oonversant with such'constructions that many devices for effecting the same purpose in substantially the same manner may be substituted therefor. 4

rlvhe rear bearing-bar, G, is made in the forni of an open-sided boX, having its open side at the rear. It has an upper iiange, g, a lower ange, g', and a vertical face, g2, the latter being provided with a series of openings, g3, that are made to conform to the cross-section of the grate-bars E, and into which the rearmost ends of the grate-bars will slide freely and be maintained in their proper erect position. An open-sided chamber, g, is formed in the bearing-bar G at the rear ends of the grate-bars E, so that the latter will be left free toeXpand endwise in a rearward direction without meeting any obstructionv that would cause said grate-bars to become bent and contorted.

The intermediate bearing-bar, H, may be made of the usual form, (shown in Fig. 1,) whereon the grate-bars will simply rest;l oras I preferably make it-the said bar may be provided on its upper face with a series of triangular ears, h, as shown in Figs. 3 and 4. ySaid ears must correspond in number and position 'to the gratebars, so that each ear'will engage in a recess, e?, formed in the lower edge of each grate-bar. The said recesses are elongated so as to permit the grate-bar to expand lengthwise; but they are fitted to bear sidewise on the ears h, so as to aid in retaining the gra-tebars in shape and position.

The bridge-wall C is built on the top of the A notch, e', out in the,

IOS

bearing-bar G in such manner that the front face of said Wall will project about two inches over the front of said bearing-bar. By this means a protection from the heat is formed for the bearing-bar G, and ashes are thereby prevented from passing,` through the openings y into the chamber g4, wherein an accumulation of such ashes might prove harmful.

I claim as my invention- 1. The chambered bearing-bar G, consist ing of an open-sided box, composed of the upper flange, g, lower flange, g', and vertical front plate, gi', the latter containing a series of openings, g, which conform to the shape and number of the grate-bars E, and which will permit said grate-bars to expand endwise therein, but will prevent the ashes from e11- tering the chamber gt, as herein specified.

2. The combination, with the grate-bars E, having' their forward ends locked in a iixed position, as herein described, of the chainbcred bearing-bar G, consisting of an opensided box, constructed as herein described,

and having its vertical front plate, g2, provided with a series of openings, g, for containing the movable ends of said grate-bars, and adapted to exclude the ashes from the chamber g, as herein specified.

The combination, with a grate-bar, E, adapted to be locked in a ixed position at one end, and provided in its under dge with a slotted recess.` el, as herein described, of a bearing-bar, H, having on its upper facease ries of ears, 71 adapted to engage in the recesses c2 of said grate-bars, in the manner and for the purpose herein specified.

4. The combination, with the chambered bearing-bar G, as herein described, of the bridge'wall C, erected directly upon the upper flange, f7, so as to overhang the forward face, g2, of said bearing-bar, as and for the purpose specified.

MILTON (l. JONES.

Yl'itnesses:

WILLIAM 1L Low, A. F. Lon'.

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