US1617197A - Water-cooled grate - Google Patents

Description

Patented Feb. 8, 192.7. 7

UNITED," sTArEs PATEN-TQFFICBD JULIUS BRAUNSTEIN, F BRONX,- NEWYORK, ASSIGNOR 'ro PREMIER COAL SAVING DEVICE CORPORATION, A o nrOnArroN or NEW YORK.

WATERFOOOLED; GBATE.

Application filed May 22,

This invention relates to improvements in water cooled grates. as usedin. connection with coal burnin and like furnaces and has as one of. its objectsto provide a series of hollow gratebars arranged closely adjacent as tovbe rigidly held together "and. mutually support one another,theinterengaging eleg ments being water tight so that no leaking can occur.

These and other advantageous objects, such as simplicity, cheapness of construction and ease of assemblage, are accomplished by the novel construction, combination and arrangementof parts hereafter described and shown in the accompanying drawing, forming a material part of this disclosure, and in which Figure 1 is a perspective view of an embodiment of the invention looking from one of the rear corners, parts being broken away to show the construction.

Figure 2 is a fragmentary bottom plan view of a portion of the grate as assembled, drawn to an increased scale.

Figure 3'is a partial sectional view, taken on line 3-3 of Figure 2 and drawn to a further enlarged scale.

Figure 4 is a similar view taken on line 44 of Figure 2.

In the drawing the numeral 10 designates in general a hollow rectangular box-like chamber having a floororbottom 11, end walls 12 and side walls 13, all of which extend to a uniform height; and in one of the side walls is some form of'a door or closure (not shown) through which the interioris accessible, as for cleaning or other purposes. v I

I The outermost grate bars 14 at the front and rear are of diflerent patterns.

Each of these bars, as shown, consists of a hollow rectangular body closed upon all sides and ends presenting a water space 15 throughout its full length, the same being disposed transversely of the fire box directly upon'the end walls 12 of the chamber 10.

The upper wall of these box-like bars is extended on adjacent sides, level with the 1923. serial my. 640,747.

outer surface as at 16, these flanges be1ng offset downwardly, at .their edges forming ledges 17, the extensions being strengthened by integral angular braces 18, the length of. theledges bemgless thanthatofth e bars,

stopping uniformly short at each end.

Below. theflanged extensions 16, at eachv end,,fon,adjacent sides of both of the extreme grate bars are relatively short and, generally circular projecting bosses 19, the purpose of which will belaterdescribed. The intermediate grate bars 20 are formed in duplicate, each being of thesame depth as the bars 14, .but relatively narrow, as can befbestseen in Figure 3. Their four walls and ends constitute water l chambers 21v and theirgupper walls are extended, as at 22 having braces23 an dprovided with ledges 24Lcorresponding to the extensions 16 and ledges 17 as described;

On the opposite side of the intermediate bars are flanges 25 having braces 26, these extensions being suited to seat on the ledges .17 or 24 with which they may be assembled.

At each end of the bars 20, below the flange extensions 22 are bosses 27 correspondingto the bosses 19 and on the opposite sides of the bars are other bosses 28, all of these several projecting bosses at one end of-the grate being in register and containing conical openings 29 and 30 respectively.

These openings are. smooth finished to receive push nipples having opposed tapers 31 and 32 fitting tightly and'containing central bores 33 through which water may flow from one grate bar to another, the water entering one of the outer bars 14 by the supply pipe 34, passing through the series of bars and out eventually through the pipe 35.

These several grate bars are firmly held together by rods 36 passing through the projection or bifurcated ears 37 on the end bars 14, the nuts 37 drawing the nipples into the conical openings in such manner as to make water-tight joints.

All of the several extending flanges 16, 22 and 25 contain a plurality of openings 38, preferably tapering their bases or larger ends being directed downwardly and open to the chamber 10, into which leads a pipe with a supply of air un- I 39 communicating der pressure.

In operation, the grate having been in-, stalled in a furnace, to constitute the bottom of its fire box, preferably With the bars extending cross-Wise, the fuel may be en tered and fire started.

An air blast, supplied by the pipe 39 provides for any required .draft and may bev controlled in any convenient manner, the air passing out through the perforations 38.

Water under head or pressure entering the pipe 34 is conducted through the series of grate bars, carrying off excessive heatin an obvious manner, the heated Water leaving" by the pipe-85 for any desired destination. From the foregoing it will be seen that the grate bars require but three patterns from Which plain castings can be made and 7 that the doubly tapered plugs or push nipset forth the manner of its construction and use, What I claim as new and desire to secure by Letters Patent is A grate comprising a series of hollovv substantially rectangular bars constituting Water chambers, laterally extending flanges formed on the respective sides of each bar and extending longitudinally thereof, the

upper surfaces of said flanges being flush With the upper surfaces of said bars, a dependingledge formedon the outer'longt tudinaledgeofone of said flanges on one side of eachbar for receiving the outer longitudinal edge portion of the fiange formed on the opposed side of the adjacent bar, whereby the adj acent longitudinal edges of the adjacent flanges-are arranged in abutting relat1on,-brac1ng means for said flanges, I means for communlcating the several hollow bars to permit the circulationfof Watertherethrough,'and meansfor clamping the bars together in assembled relation.

Signed" at NeW York inthe county of New York and State of New York this 12th day of May A.-D.-1923.

JULIUS BRAUNSTEI-N.

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