US510555A - Furnace - Google Patents

Description

Sheet 1.

3 Sheets (No Model.)

P. H. RICHARDS.

FURNAGE.

lPatented Dec. 12 1893.

////7////%7//////A7/////Qfl wif/7555.55. {M% @imm ff mm THE NArlaNAL LrmoaMPmNu eoMFAnY.

wAsmNaroN, u. c.

(No Model.) Y 3 sheetssheet 2.

- F. H. RICHARDS.

PURNAGB.

PatentedDec. 1 2, 1893.

I No. 510,555.

THE NAhoNAL LlmoanAPnma cuMFANv.

(No Model.) 3 Sheets-sheet 3.

P. H. RICHARDS.

- "FURNAGL Patented vDec. 12, 1893.

:Z6/,V l9 'y/l ti/Z6 SQZWUUUUUUUU 9 '17 W, L i 56522; M5 oww@ NNNNNNNNNNNNN C.

Nrrnn STATES Fries.

nTnNr FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO ECKLEY- B. OOXE, OF DRIFTON, PENNSYLVANIA.

FURN'AGE.

SPECIFICATION forming part of Letters Patent No. 510,555, dated December 12, 1893.

Application filed September 4. 1893. Serial No.7484l702. (No model.)

To aZZ whom t may concern:

Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Furnaces, of which the following` is a specification.

This invention relates to traveling-grate furnaces; the object being to provide a furnace in which the grate-bars of the furnace- Iioor shall be operable independently of the traveling-movement of said floor, for the purpose of breaking up and agitating the fuel during the combustion of the same.

In the drawings accompanying and forming a part of this specification, Figure l is a sectional side elevation of a furnace embodying my present improvements. Fig. 2 is a view similar to Fig. 1, with the grate-mechanism and the air-blast apparatus removed. Fig. 3 is a partial plan view of the furnace. Fig. 4 is a transverse section in line a-a of Fig. 1, showing the parts at the right-hand of said line as seen from a point at the left-hand thereof. Fig. 5 is a side view of the furnace, as seen from above in Fig. 3 and from the left-hand in Fig. 4, 'for illustrating the apparatus shown for operating the movably-supported grate-bars. Fig. 6 is a plan view of one of the grate-bars. Fig. 7 is a side elevation of the same, as seen from below in Fig. 6. Fig. 8 is an end view of the grate-bar as seen from the right-hand in Fig. 7. Fig. 9 is an end view of a series of the grate-bars assembled in the traveling grate, and is illustrative of the operation of the grate-bars.

Similar characters designate like parts in all the figures.

Inasmuch as my present improvements are more especially intended for use in connection with the furnace described in Letters Patent No. 499,716, granted to Eckley B. Coxe, .l une 20, 1893,I have herein shown these improvements applied to a furnace of the kind described and claimed in said patent; but my present improvements are applicable to other kinds of traveling-grate furnaces, being more particularly intended 'for use in burningbituminous or semi-bitu minous coals.

The furnace shown in the drawings has its 52e furnace-chamber, C,inclosed, in practice. by the usual side-walls as 2 and 4, and at the rearward end thereof has the usual bridge-Wall, and at the forward end thereof has the wall 3, through which is a passage-way, 5, in which 5 5 the fuel is supplied to the grate from an' ordinary hopper, H, at the front end of the furnace. 'lhe grate-mechanism is inclosed in a mechansmchamber, C, underneath the furnace-chamber, access to which is or may be 6o obtained by means of the door 55, at the forward end ofthe furnace. Said mechanismchamber is ordinarily so inclosed for the purpose of preventing or reducing the leakage of air by way of the edges of the traveling grate.

The traveling grate, which is designated in va general way by G, consists of grate-bars and carrying-chains therefor, which chains, designated by 50 and 50', are carried by chain- 7o wheels 12 and 14, ixedon the driving- shafts 13 and 15, which are supported in suitable bearings in the furnace structure. For actuating the grate-mechanism, one set of shafts, l5, has on its projecting end a worin-Wheel, 40, which meshes with a worm, 41,0n a driving-shaftv that is carried in bearings, 43 and 43', on the framework of the furnace. Said driving-shaft 42 may be actuated by `means of a pulley (not shown) fixed thereon in the 8o usual manner. The links, 6, of the chains 50 l n o s 1 n `and 50 have bearings for recelvlng tne Journals, 8 and 8', of the movably-supported grate-bars, 9, which in the preferred form thereof shown in Figs. 6, 7 and 8, consist of a 85 bar or vertical plate 9', provided along the upper edge thereof with the grate-bars proper, or fuel-supporting fingers 9", which, as shown in Fig. 3, intermesh the fingers of one pair with those of the next pair so as to form a 9o continuous grated fioor for the f urnace-chamber. At the ends of the grate-bars 9, these are provided with the end-walls, 16 and 16', which, as indicated in Fig. 4, form a continuous wall along the edge of the furnace-floor gf; for properly holding up the edges of the layer 22 of Vfuel on the grate. See Fig. 1. The foregoing arrangement of the details of the grate-mechanism will be undestood by comparison of the several figures of drawings, esespecially Figs. 1, 3, 4 and 9.

The upper run, 10, of the endless grate G is shown supported by the lower edges of the beams thereof running upon the upper side of the air-blast chamber J, which chamber, as described in the aforesaid Letters Patent No. 499,716, consists of a series of separate air-blast chambers, ct, 1J, c, d, supplied with air under varying pressures, through the pipes a', ZJ', c, and d', from the conduit, M, or other source of air-supply.

The lower run, 11, of the endless grate is shown supported by the guard-walls of the grate-bars running upon the ways 19 and 19', which are fixed in proper position therefor. In practice, in cases where the described airsupply chambers are not used, similar guides or ways will be provided for supporting the upper run of the traveling grate.

For the purpose of operating the gratebars to break up the fuel, and to do this independently of the traveling-movement of the furnace-door, the grate-bars are shown provided with lever-arms, 17, whose projecting ends, 1S, (preferably in the form of studs and which may be provided with rollers, not shown,) run in a guide-way or groove, 20, corresponding in form to the traveling-movement of the grate-bars. The upper side of said groove is formed in a grate-operating bar, 21, which is shown pivotally supported at 23 and 24, on the rocker-arms 25 and 25', which are journaled at 26 and 27, in bearings on the framework of the furnace structure, and whose outer arms, 2S and 2S', are connected by means of a rod, 29, for imparting to said operating-bar a reciprocatory movement transversely of the furnace-floor. On the operation of said bar, those of the grate-bars whose lever-arms engage in the groove 2O of said bar 21, are thereby oscillated on their journals 8 and 8 in the carrying-chains. IVhen said operating-bar is raised, the gratebars are thrown forward, as illustrated in Fig. 9; and when the operating-bar is lowered below its position in Fig. 2, the grate-bars will be reversely actuated. By this means, the fuel upon the grate may be thoroughly agitated and broken up whenever required, by imparting one or more reciprocatory movements, as described,to said operating-bar 29. This may be effected automatically by means of a cam, 30, fixed on the driving shaft L.1.2, and having therein a groove, 81 for receiving the stud, 32. By lifting the pin 32 (see Figs. 2 and 5) in the connecting-rod 29 ont of engagement with said cam, the operation of the grate-bar-actuating apparatus may be stopped. In practice, a suitable hand-lever,

33, will be fixed upon one of the rockers, as

28', as indicated in Fig. 5, whereby the attendant inay actuate the operating-bar 29 by hand.

The operation of the endless grate, and the mechanism for operating the same, will be readily understood from the preceding description in connection with the drawings and the aforesaid Letters Patent. The operation of the grate-bars by means of the actuatingdevices described therefor will only be required when the same fuel upon an ordinary grate would require the use of a slicing-bar, and at such times the grate-bars may be operated for breaking up the coked fuel, either by hand or by means of the automatic apparatus described therefor.

IIaving thus described my invention, I claiml. In a furnace, the combination, in the grate-mechanism thereof, of carrying-chains, means for actuating said chains, rocking grate-bars supported on the chains, and reciprocatory grate bar actuating apparatus, substantially as described, engaging the gratebars for rocking the same during their travcling-movement.

2. In a furnace, the combination with carrying-chains and means for actuating the same, of rocking grate-bars carried by the chains and having lever-arms, and a reciprocatory operating-bar engaging said leverarms, and means for actuating said bar whereby the grate-bars may be operated during the traveling-movement of the same.

3. In a furnace, the combination with a series of rocking grate-bars, and with apparatus for carrying the said bars laterally thereof, a reciprocatory operating-bar engaging said grate-bars and driving-shaft, connections from said shaft for operating the grate-bar-carrying apparatus, and means intermediate to said shaft and operating-bar imparting reciprocatory movement thereto, and for the purpose specilied.

t. In a grate-mechanism of the class specified, the combination with the carryingchains, of a series of intermeshing grate-bars journaled on said chains, and a reciprocatory grate-bar-actuating apparatus engaging the grate-bars for rocking the same, substantially as described.

5. In a furnace, the combination with a grate-bar carrier supported and arranged for a traveling movement, of recprocatory gratebars carried side by side by said carrier and adapted for movement independently of the traveling movement of the carrier.

FRANCISu H. RICHARDS.

Witnesses:

FRED. J. DOLE, JOHN L. EDWARDS, Jr.

IOO

ITO

Images