US708292A - Locomotive. - Google Patents

Description

Patented Sept. 2, I902.

L. ATWUOD.

LOCOIGTIVE.

(Application filed Aug. 3, 1901.]

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(No Modal.)

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No. 708,292. Patente d Sept. 2, I902.

L. ATWUUD.

LDCOMUTIVE.

(Application mad Aug. 8. 1901.) (N9 Model.) 2 Sheets-Sheet 2.

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LOCOMOTIVE.

SPECIFICATION forming part of Letters Patent No. 708,292, dated September 2, 1902.

Application filed August 3, 1901. Serial No. 70,822. (No model.)

To aZZ whom it may concern.-

Be it known that I, LEONARD A'rwoon, a

citizen of the United States, residing in Phila:

delphia, Pennsylvania, have invented certain Improvements in Locomotives, of which the following is a specification.

The object of my invention is to improve the construction of the fire-boxes of locomo tives, so that the passage leading from the fire-box to the tubes of the boiler can be varied. This object I attain by making the bridge-wall and deflector in the fire-box adjustable. I also make these parts removable for the purpose fully described hereinafter.

In the accompanying drawings, Figure 1 is a longitudinal sectional View of a locomotiveboiler, illustrating my invention. Fig. 2 is a transverse sectional view on the line 2 2, Fig. 1. Fig. 3 is a side View illustrating the construction of the bearings for the trunnions of the bridge-wall and deflector.

A is the boiler, having a series of longitudinally-arranged tubes at, fitting the tubesheets a a Bis the fire-box of the boiler, having a suitable grate b.

D is a bridge-wall which is carried by a shaft cl, mounted in bearings c c in the side walls of the boiler, as shown in Fig. 2. By this arrangement the bridgewa1l can be moved to any angle desired.

The bridge wall is preferably arranged some distance from the tube-sheet a, so as to form a combustion-chamber B back of the bridge-wall. Directly above this combustionchamber is a deflector D, mounted on a shaft d, journaled iubearings c in the side walls of the boiler, similar to the shaft d. This deflector can also be turned on its pivot toja certain extent. Byadjusting the bridge-wall and the deflector the size of the combustionchamber can be increased or diminished and the passage leading from the'fire-box to the combustion-chamber can be varied as desired. The bridge Wall and deflector are preferably made of a metallic frame having a facing of fire-brick. This construction may be varied and other materials used without departing from the essential features of my invention. Back of the bridge-wall D in the present instance is an air-nozzle G, communicating with anair-passage Gr directly under the boiler, so that air under pressure may be projected from thevnozzle into the combustion-chamber B. Any number of these nozzles may be used, according to the width The air-passage G communicates with the ash-pit 3) directly under the grate b and, in fact, forms a continuation of this ash-pit; Dampers b b are arranged at the front and rear ends, respectively, of the ash-pit, and at the forward end of the air-passage is a damper I). These dampers can be set so that air can be admitted to the ash-pit either under pressure or from the space in front of the air-chamber or rear of the firebox when it is not desired to run with air under pressure. The air-passage G communicates with a pipe G connected to a fan blower G which is driven by an engine E. (Shown in diagram, Fig. 2.) The shaft 6 of this engine is mounted in suitable bearings and carries the blades of the blower. By this construction air under pressure can be forced either to the nozzles G or to the nozzles and space under the grate. The blower may be run directly from the moving parts of the engine; but I prefer to supply an independent engine for the blower, as indicated.

It will be noticed that the shafts d and cl, on which the bridge-Wall and defllector are mounted, are square and have rounded trunnions. I prefer this construction and use a bearing (shown in Fig. 3) which is arranged to fit in an opening in the boiler-casing, so that when it is desired to remove either shaft, so that the bridge-Wall or the deflector can be detached, the bearing on one end is removed and the shaft withdrawn. Then the bridge-wall or deflector, or both, can be drawn back to the rear end of the boiler, so that free access may be had to all the tubes. The shaft 66 has an arm (1 and the shaft (1 has an arm d These arms may be connected by rods to operating-levers in the cab of the 10- comotive or within easy access of the fireman, so that the parts can be adjusted while the locomotive is under way.

I have shown in Fig.2? of the drawings a fire-box narrower at the top than at the bottom, so that the side walls are inclined, and the bridge-wall and deflector are shaped accordingly. When this construction is used, it will be necessary to detach the deflector ICO when it is wished to gain access to the tubes; but if a fire-box having vertical side walls is used then it is not absolutely necessary to provide means for detaching the deflector except in the case of extended repairs.

I claim as my invention- 1. The combination in a boiler, of a fire-box, a tube-sheet and tubes, a pivoted bridge-Wall within the fire-box some distance from the tube-sheet and forming a combustion-chamber, a grate with external means for adjusting the bridge-wall to increase or diminish the size of the combustion-chamber, substantially as described.

2. The combination in aboiler, ofa fire-box, a tube-sheet, and tubes, a grate, a bridge-wall within the fire-box some distance from the tube-sheet and forming a combustion-chamber, a pivoted deflector above the bridge-wall, with external means for adjusting the deflector to increase or diminish the size of the combustion-chamber and the passage leading thereto from the fire-chamber, substantially as described.

3. The combinationin a boiler, of a fire-box, a grate, a pivoted bridge-wall, a pivoted deflector above the bridge-wall, means exterior of the fire-box for adjusting both the bridgewall and the deflector, substantially as described.

4. The combination in a locomotive, of a fire-box, tubes leading from the fire-box, a grate, a bridge-wall back of the grate, a deflector above the bridge-wall, both the grate and the deflector being pivoted, with means exterior of the fire-box for turning both the bridge-Wall and the deflector on their pivots so as to increase or diminish the passage leading from the fire-box to the tubes or to adjust the parts that access may be had to the tubes, substantially as described.

5. The combination in a boiler, of a fire-box, a grate, detachable bearings in the side walls of the fire-box, a pivot-shaft mounted in said bearings and extending through the fire-box, a deflector so mounted on the shaft that when one of the bearings is detached the shaft can be withdrawn to allow for the removal of the deflector, substantially as described.

6. The combination in a boiler, of a fire-box, a grate, a pivoted bridge-wall, a pivoted defiector above the bridge-wall, shafts on which the said bridge-wall anddeflector are mounted, said shafts extending through the side wall of the fire-box and detachable from the said bridge -wall and deflector, substantially as and for the purpose specified.

7. The combination in a locomotive, of the fire-box, a grate, an ash-pit under the grate, tubes leading from the fire-box, a pivoted bridge wall, a pivoted deflector mounted above the bridge-wall, an air-pipe communicating with the combustion-chamber between the bridge-wall and the tube-sheet, and an air-blast device for forcing air under pressu re into the combustion-chamber and under the grate, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LEONARD ATWVOOD.

Witnesses:

WILL. A. BARR, J 0s. H. KLEIN.

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