US1255727A - Grate. - Google Patents

Description

W. FiSHER GRATE.

APPLlcATlaN FILED Nov.8.19|6.

Patented Feb. 5, 19318..

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GRATE.

Application filed November 8, 1916.

To all whom t may concern.'

Be it know'n that I, WARREN FISHER, a citizen of the United States, residing at N ew Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Grates; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

rEhe present invention relates to improvements in grates, and more particularly to improved fire-bars, in which air or other fluid is introduced from a source of supply through passages and opening, in the firebars in order to maintain the same at a comparatively low temperature, prolonging the life of the fire-bar by preventing the burning and warping thereof, and into the such iiuid will furnish an and aid in the combustion of the fuel. It will also be seen thereis abundant air space in the bars and that the bars can be used for natural draft, and still be amply strong and give high eficiency.

T he improved structure is more especially designed to give good results in burning of bagasse and sawdust, or other waste fuels, although it will be found to give good results in burning wood, coal, or other fuels. However, it is especially designed for burning bagasse and the air space between the teeth is large.

. One object of the present invention lies increased draft Vin providing the re-bars of a substantial construction, not to any appreciable extent weakened by the fluid passages and openings, and one in which convenient access is to be had for cleaning the same of any ash or foreign matter that may have found its way into the fluid passages through the openings. Y It is another object of the present invention to so arrange and dispose the lugs and openings on the several fire-bars that, when assembled to form the grate, such lugs will be received between the proximate lugs in the adjacent fire-bar, leaving spaces to either side thereof where the fluid is directed from the openings therein.

lVith thesevand other' objects in view the invention consists in the novel details of construction and combinations of parts more Y fully hereinafter disclosed and particularly pointed outV in the-claims.

ln the accompanying drawings forming Specication of Letters Patent.

Patented lFeb. 5, fdild. serial No. 130,237.

a part of this application, and in which similar reference symbols indicate corresponding parts in the several views:

Figure l is a fragmentary front view of a furnace showing the grate operating means.

Fig. 2 is a sectional view through the furnace showing assembled fire-bars composing the grate in top plan.

Fig. 3 is a sectional view taken on the line 3-3 in Fig. 2, with parts broken away.

Fig. 4 is an enlarged top plan view, partly in section, of an improved fire-bar constructed in accordance with the present invention.

Fig. 5 is a side elevational view thereof.

Fig. 6 is an end view of the improved bar, and

Fig. 7 is a cross sectional view therethrough on the line 7-7 in Fig. 4.

eferring more particularly to the drawings, 1 designates generally a. furnace structure which is preferably of refractory material, incased and bound together by the outer metal covering 2, but the outer metal covering is not necessar and is not always used.

The front of the 3, in which are the usual doors 4 leading to the grate, and through which the fuel is introduced, and the doors 5 through which access is had to the ash pit, indicated at 6 in Fig. 3.

At 7 is indicated a bar extending across the front of the furnace, and at 8 a bearing bar dividing the grate into two parts holding each a series of the improved lire-bars.

Referring now more particularly to Figs. 4 to 7, inclusive, the improved fire-bar is designated generally at 9, it being formed with a series of lugs 10 and 11, extending in opposite directions, and the lugs 10 being in staggered relation to the lugs 1l, as plainly seen in Fig. 4. The ends of the lugs lO and 11 are rounded, as appears in Figs. 6 and 7, to prevent possible burning.

The body 9 of the improved fire-bar is formed with one or more passages 12, preferably extending longitudinally as shown, and communicating with such passage 12 are a plurality of openings 13 and 14, extending in diverging directions and advantageously inclined in the manner shown in Fig. 7. These openings 13 and 14 have their outer ends disposed beneath the flanges 15 and 16 of the enlarged solid head 17 of the fire-bar, such flanges affording an effective protection for the several openings furnace is indicated at l holl'ow trunnions other material enterthe passage 12.-

7 that the edges 18 and 16 are inclined ash released by a preventing any ash or ing therethrough into will be seen from Fig. and 19 of the flanges 15 in such wise that any clinker resting on the head 17 will be directed beyond the mouths of the openings 13 and 14, and will fall free thereof into the ash pit 6 below the grate.

The head 17 has a shallow channel 2O extending longitudinally of the fire-'bar 9 for yielding a seat for the fuel, and preventing crowding of the fuel to one part of the grate. A small amount of ash collects in this channel when prevents clinkers clinging to the bar. f

The improved fire-bar is supported on 21 and 22, which are in communication with the passage 12 in the body 9, and are threaded as at 24 to receive plugs 23, which may be removed to give access to the trunnions and passage 12 for purposes of cleaning the same of any ashes that may have crept through the openings 13 and 14. One trunnion 21 of each of the improved fire-bars is elongated over the opposite trunnion 22, and in such elongated trunnions 21 are formed ports 25 adapted to register with similar ports 26 in bearings 27 provided to receive said elongated trunnions. The bearings 27 are cast or fitted in headers 28 and 29 built in the furnace structure 1,

' and placed in communication with a source `of the fuel.

of air or other fluid supply through pipes 30 and 31. Other means may, of course, be furnished for introducing the fluid to the headers 28 and 29, and such fluid may be admitted thereto in any other manner than shown provided it does not alter the opera.- tion of the invention. The smaller trunnions 22 of the fire-bars are received in bearings held by the bearing Fig. 2.

Referring now to Fig. 2, it will be seen that when the various fire-bars are assembled to constitute the grate, they are fitted in close relation with the lugs 10 of one bar extending midway between the proximate lugs 11 of an adjacent fire-bar, leaving spaces 32 and 33 therebetween.

The fluid openings 14 in one side of each fire-bar are arranged opposite the spaces'32 so as to deliver the air up through the bed This will result from the inclination upward given said holes. As the air issues out of the holes upwardly it will draw air from the ash pit beneath up bar 8, for which see through the grate and against the lugs 10V and 11, thus tending to keep said lugs cool, this cooling'effect being further assisted by the fluid passing through the passage 12. The combined air delivered from the holes and the ash pit will contribute to maintain a fire of great intensity giving of't1 increased heat.

the bars are shaken, and

Y For the purposes of shaking, the fire-bars may be connected to one or more operating devices in any way desired. Preferably the grate as shown in Fig. 2 is for purposes of shaking divided into four parts and four separate operating devices are provided on the front 3 of the furnace (see Fig. 1). The arms 34 on the fire-bars 9 are connected to rods 35, 36, etc., in any desired number and arrangement, such as that indicatedin Fig. 3, and the rods 35 and 36 are respectively connected through links 37 and 38 with levers 39 and 40, fulcrumedas indicated kat 41 and 42 on the convenient position to be operated. I

Latches 43 areprovided to hold the levers in a position where the fire-bars of the grate will be held upright with the lugs 10 and 11 extending horizontally; are employed to operatethe several levers.

In the operation of the invention, fuel is introduced through the doors 4 and de? posited on the fire-bars 9 composing the grate. bustion proceeds the'finer ashes will pass down through lthe spaces 32 and 33 into the ash pit 6, being diverted from the mouths of the fluid openings 13 and 14 by front 3 of the furnace in a and handles 44 The fire is kindled and as the com! 'l the inclined edges 1S and 19 on the flanges A through the registen 14, where it will be Vdirected-up linto the furnace throughV spaces 32V and 33, between the lugs 10 and 11, on which it will exert a cooling eect by increasing the furnace draft. The presence of fluid in the passages y* 12 will valso have fire-bars 9 as a wholel and will keep the same at a comparatively low temperature in the furnace, such as will prevent the burning and warping of the fire-bar consequent upon expansion and contraction, and will thus prolong its life.' As the air or other fluid employed passes through the lopenings 13 and 14, it will come into active contact with the burning fuel, and will rise upwardly through the burning bed, furnish- Ving an increased draft and aiding in the combustion.

The handles 44 may be applied over-the proper levers 39 and 40 when the fire ist-o be cleaned, and the latchesV 43 released,` whereupon,

by oscillating the handles and levers, the fire-bars willY be similarly moved to swing their lugs 10 and 11 into the vertical position, thereby allowing the ashes-to drop through the spaces therebetween. `f When the teeth on one bar pass between the a cooling eect on the i maare? teeth on the adjacent bar they clear out all the grate-bar further having hollow jourclinker and ash, and quickly clean the lire, nals with internally threaded ends, one of and prevent the air spaces from clogging. the journals being enlarged and having an By giving the bars part oscillation the bed opening through the side thereof to com- 5 of the fuel is broken and shaken up and municate with a Huid-supply source, and 35 combustion increased. threaded plugs fitting in the ends of said When cleaning is desired, the fire-bars journals, substantially as described. are removed and the plugs 23 are with- 2. A grate including a Series of fire bars,

drawn, thus giving uninterrupted access to each of said fire bars being formed of a 10 the passages 12. After the ashes and forone-piece cast body having a longitudinal 40 eign matter have been cleared from the paspassage and teeth extending in opposite disages 12 and openings 13 and 14, the plugs rections and staggered relation, said body 23-may be replaced and the fire-bars again having a staggered series of openings conreturned to the furnace. nected with said passage and extending upl5 Having thus described my invention, what Ward in divergent relation, one opening be 4.5 claim and desire to secure by Letters Pating placed between each pair of teeth and ent of the United States is: very close to the face of one of such teeth,

l. A one-piece cast grate-bar formed with Vsuch body being provided with a head hava body having a longitudinal passage and ing a channel lengthwise thereof and flanges g@ with teeth extending in opposite directions projecting over the mouths of said openings, 50 and staggered relation, the body having a said flanges having inclined edges, the body staggered series of openings connecting with of the fire bar further having hollow joursaid passage and extending upward in dinals with internally threaded ends, one of vergent relation, one opening being placed the journals being enlarged and having an 25 between each pair of teeth and very close opening through the side thereof to com- 55 to the face of one of such teeth, such body municate with a iiuid supply source, and provided with a head having a channel threaded plugs litting in the ends of said lengthwise thereof and flanges projecting journals, substantially as described. over the mouths of said openings, said In testimony whe1eof,laiiix my signature.

se ianges having inclined edges, the body of l/VARREN FISHER.

@aptes et s patent may be si s ed for ve cents each, by addressing: the Commissioner of Patents,

Washington, D. C.

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