US291120A - Locomotive-boiler - Google Patents

Description

vhea-ti11g-surface is attained relativelyto the orfire-bridge interposed between the combustion- To a/ZZ whom it may concern,.-

4ers, of which improvements the following is a led'and issued to me under dates of July 3,

.fuels,v (such as bituminous coals of various descriptions,) which are analogous thereto in the UMTED ASTATES' RAieNr PrienrocoMoTivE-BOILER.

SPECIFICATION forming part of Letters Patent Nuo. 291,120, dated January 1, 1884.

' Application filed August 23, 1883. (No modul.)

Be it known that I, JOHN E. W'OOTTEN, of the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Locomotive-BML specification.

My improvements more particularly relate to locomotiveboilers of the class in which a material increase of grate area and re-box dinary construction by the provision of a rebox,which is located .above and extended laterally beyond the driving-Wheels, and which is combined with a combustion-chamber and a chamber and theiire-box. -Said features are fully exemplified in Letters Patent of the United States Nos.192,725 and 254,581., grantV 1877-, and March 7, 1882, respectively.

vrllheobject of my present invention is to afford improved facilities for the effective and economicaly combustionv of lignite and other particular of readily permitting the separation of small and light 'particles 4from the larger masses or fragments in which they are delivered for con sumpt ion, 'when burned under a forced blast, even thoughthe latter may be comparatively mildA in degree. v

To this end my improvements consist in a table or repository located'atthe forward end of fire-box andextending transversely to the same, the `upper surface'of said table being located above the endfof the grate, the rear end of the table being closed between its upper surface and the level of the'grate, and said table being adapted to receive and sustain light particles of fuel that may be lifted from the mass upon the grate by the action of the draft also, in a table or repository located on and support-ed by the forward portion of the iiregrate of a locomotiveboiler; also, in a table orrepository composed o'f one or a series of sections of iirefbrick, tile, or other sufliciently refractory material,built into the forward portion of the fire-box of a locomotive-boiler, and supported by the grate thereof; also, in the combination of alaterally-extended fire-box, a fire-bridge, and a transverse table or repository extending rearwardly from said fire-bridge across the Jreloox.`

The improvements claimed arc hereinafter more fully set forth. l

In the accompanying drawings, Figure lis avertical longitudinal central section through a locomotive-boiler embodying myinvention; Fig. 2, ahorizontal longitudinal section through the same at the line w x of Fig. 1,' and Fig. 3 a 'I vertical transverse section vat the line y y of vlfy improvements are hercingillustrated and will be described as applied in a locomotiveboiler similar to that of my Letters Patent No.

254,581, aforesaid. The waist or barrel A of the boiler is fitted with a series of lire-tubes, df

can be conveniently located about midway of thelength ofthe boiler or otherwise, if desired,

and the smoke-box A is provided with a stack, A4, of any preferred construction. The fire- 'box B is located entirely above the driving wheels, and is extended laterally beyond vthe driving-wheels tov any desired extent within the greatest width admissible for passage o ver the road..A It is, asl usual, furnished `with a proper grate, b', furnace-doors b2, and ash-pans b3, the latter suitably arranged relatively to the engine-frame and driving-axles.

Under my present invention, I provide a vtable or repository, C, which may be either horizontal or inclined iny or about in correspondence with the inclination of the fire-grate b', and which extends across the re-box Bimmediately inrrear of the fire-bridge a2, above the surface of and preferably supported upon the forward portion of the fire-grate, and having its rear end closed between its top and the level of the grate, said table or repository thus presenting upon its upper side a substantially impcrforate surface, which is adapted to receive and sustain particles of the fuel which may from time to time be lifted by the action of the exhaust from the mass of fuel in combustion upon the grates, as well as to serve as the lower I under certain conditions of service, be found boundaryof a space within the firebox,\vhieh fulfills in agreatmeasurcthefunction of a combastion-chamber for the gases. The tendency of such separated particles of fuel to be carried over the lire-bridge and into the combustionchamber A2 and tubes, which ordinarily obtains, is, bythe provision of the table C, substantially nullified, and such particles, after yielding the heat duc to their combustible elcments, remain upon the table, and may be removed therefrom at pleasure or convenience. It will be obvious that it is not designed nor desirable that fuel should be fired upon the table C; but if any portion of the fuel be accidentally projected on the table, its function will not thereby be interfered with. The height of the table above the surface of the grate should be sufiicient to obviate such tendency for fuel to be thrown upon it with proper firing, and in practiceits upper surfaceis located above the surface of the grate at or about the ordinary level ofthe bed ot' fuel carried thereon. In the instance shown the table C rests and is supported directly on the top of the grate. which, for simplicity and convenience and economy of construction, I deem more desirable than supporting it separately therefrom. The latter plan may, however, be adopted, if preferred, it being essential in such case that no opening should be permitted to exist at its rear end between its lower side andthe top of the grate. The table G is b v preference formed of a tile or a series of bricks, tiles, or sections of fire-clay or other sufiiciently refractorymateriahwhich maybe builtinto the front end of the fire-box, so as to form a continuous body therein, extending from the back of the lire-bridge over a greater or less portion ofthe area of the grate, as regulated by the characteristics of the particular fuel employed.

It has been found in practice, with engines having an area of fire-box on line of grate of about seventy-six square feet, that with some fuels a table covering ten percent. of the length of the grate is eflicienuwhereas with other fuels a tablehas been employed covering as much as twenty-tive per cent. of the length of the grate. It may, however,with certain fuels or advisable to extend thc table over a greater fraction of the length of thc grate than that last mentioned.

A table constructed and supported as before set forth is of comparatively slight cost, and can be readily andl expeditiously inserted, repaired, or removed whenever required.

The application of my improvements is inexpensive, as it involves no changes in the fire-box proper, and their practice with fuels of the description hereinbefore referred to has been characterized by entire freedom in steaming without undue labor in firing, and with a material reduction of the emission of smoke and light cinders from the stack.

I claim as my invention and desire to secure by Letters Patentl. A table or repository located transversely to the lire-box of a locomotive-boiler at the front end7 and covering the forward portion of the grate thereof, the rear end of said table being closed from its top to lthe surface of the grate, and its upper surface being located above the surface of the grate at or about thc ordinary level of thebed of fuel thereon', substantially as set forth.

2. A table or repositorylocated on and supported by the forward portion of the grate of a locomotive-boiler, its upper surface being located above the surface of the grate at or about the ordinary level of the bed of fuel thereon, substantially as set forth.

3. A table or repository constructed substantially as described, composed of one or a series of tiles.bricks, or sections of refractory material, built-into the forward portion ofthe fire-box of a locomotive-boiler, and supported bythe grate thereof, substantially as set forth.

4. lThe combination, in a locomotive-boiler, of a laterally-extended fire-box, a fire-bridge, and atable or repository extending rearwardly from said tire-bridge and across the fire-box, substantially as and for the purpose set forth.

JOI-IN E. WOOTT EN. Witnesses:

J. SxowDEx BELL, .Trims M. Lxxms.

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