US1033008A - Locomotive-boiler furnace. - Google Patents

Description

J. H. GROVE. LOUOMOTIVE BOILER FURNACE. APPLIOATION FILED 00119, 1908.

' Patented July 16, 1912.

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APPLICATION FILED 0GT.19, 1905.

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Patented July 16; 1912.

4 UNITED STATES PATENT FFIQLBZ,

JAMES H. GROVE, or OMAHA, NEBRASKA, AssIqNoR, BY ivrnsnnassrennnn rs,

TO AMERICAN ARCH COMPANY, or NEW YORKQN. 3., A conroaarzon or New YOBK. I

V Specification of LettersQPateng. Application filed October 19, 1908 Serial No. 453,526.

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Patented July 16, 191 2.

To all whom it may concern l 3e it known that I, James H. GROVE, a citizen of the United States, and a residentof Omaha, Douglas county, Nebraska, have Invented certain new and useful Improve.

ments in Locomotive-Boiler Furnaces, of

; furnaces andhas special reference to improvements whereby such furnaces are adapted to the burning of lig'nite.

The object of my invention, specifically considered, is to provide means for battling or interrupting the flow of gases from the grate to the fines and causing the thorough admixture thereof in the firebox, and further', to at the same time, admit hot air and enforce the admixture thereof with the com bustibles in the firebox.

My invention consists generally in a loco motive boiler furnace comprising a. firebox having a fine sheet at one end and a fuel door at the other end, incombination with a refractory front arch-occupying an inclined positioniiifth e frontportion of the firebox between thefiue' sheet and the grate and a vertical or crown arch occupying the upper central portion of the firebox, above and back of the front arch; ,said vertical or crown arch being provided with air pas- My invention will be more readily understood by reference to the accompanying drawings "forming a part of this spec1hcation and in which Figure 1 is a vertical section -.of a locomotive boiler furnaceembodying my invention, on the line Y- -Y of'Fig. 2. Fig. 2 is a plan view thereof, the crown sheet of the firebox being broken away to disclose the arches. Fig. 3 is a vertical section on the line X X of Fig. 1. Fig. -L illustrates my invention as applied to lireboxes of-the narrow 3 type As shown in the-drawings 2 represents the shell of the boiler; 3 the tines; 4: the flue sheet; .5 the rear sheet of the firebox; (3 the door opening; 7 the fuel door which closes the opening; 8, 8 the sheets; 9 the crown "'shee't';'-10 the grate; and, 11 the arch supporting tubes.

A r epresentstlie front arch and B is the vertical or crown arch. Both of these arches arecomposed of refractory material; in other words, each is made up of a plurality ofrefractory bricks of suitable form, 'supported by the arch tubes, 11. "The front arch is a so called solid arch, thatis, it is made up of imperforate b'ricks,'a. It extends from theflue sheet in a rear fard and upward direction and terminates substantially at the center of the firebox.

much as in its'lower portion it contains air fehannels or ducts, b and openings, 5 wvhereby communication is established be,-

ween the air passages and the firebox. I These openings are arranged on the bottom thimbles, 6 in the sides of the firebox. The upper portion of the crown arch, 'B, may be formedof solid brick.- At the'topof the arch I prefer to notch orrece'ss' the bricks as shown at b" to reducetlie area of contact between the arch, B, and thecrown slr'e'etof the'firebox. The opening, (1, between the upper end of the arch, A, and the lower part of the arch, B,- is termed-- the throat of the furnace. 'lhechamber, D,-above the arch, A,-is called the coi'ubustion cliau-iber; the space, F, below the arch, A, and back of "the arch, B, is termed the tircchamber.

The operation of my invention is as follows: A partial vacuum ordraft is produced in the firebox by the action of the blower or exhaust nozzle, not shown, in the front end of the boiler. The burning gases therefore tend to flow direct from the bed of fuel on the grate to the lines or smoke 1. '1 1 1. I 4 outlet, 3; This movement of the gases 15, however; interfered withand prevented by the arches A and B. The arch, A; causes the gasesfrom the front end of the firebox to flow rearwardly toward the throat, C, and the arch, B. The arch, B, serves to cut-off the direct flow of gases from the rear end of the firebox to the front end thereof and chamber are caused to comingle beneath the throat, C. The vacuum 1n the firebox causes air to rush through the passages 7) of the arch, B, and the air being therein heated is or lower edge of the arch."'. Tlie air is sup-. plied to the passages, 5 thIOllf h tubes or The arch, B, may be termed a hollow arch inasthus the gases from all parts of the fire.

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