US2155604A - Locomotive stoker - Google Patents

Description

April 25, 1939. J. J. KRESS LOCOMOTIVE STOKER Filed Jan. 20, 1958 3 Sheets-Sheet l INVENTORQ Joseph J Kr'eSS BY ATTORNEYS April 25, 1939. J. .J. KRESS LOCOMOTIVE STOKER 3 SHeets-Sheet 2 Filed Jan. 20, 1958 Aww . INVENTOR Joseph J Kress TORNEYS BY LZM-M %\N UN 1| QQW' QQN J. J. KRESS LOCOMOTWE STOKER April 25, 1939. 2,155,604

3 Sheets-Sheet 3 Filed Jan. 20, 1938 ATTORNEYS Patented Apr. 25, 1939 UNITED STATES PATENT OFFICE- LOCOMOTIVE STOKER tion of Delaware Application January 20, 1938, Serial No. 185,824

4 Claims.

This invention relates to locomotive stokers of the type feeding through an opening in the firebox backwall.

It is the principal object of this invention to provide an improved stoker which feeds fuel through the firing opening in the locomotive boiler backwall, such stoker being arranged to provide unusually free access to the interior of the firebox through said opening and having a door operable to open and close communication with said firebox.

A further object of this invention is to provide a stoker of the above construction whereby trimming of the fire is more readily accomplished.

It is also an object of this invention to provide a firedoor which is mounted upon the stoker discharge conduit and arranged for telescopic movement with respect thereto.

The preferred means by which the several objects are accomplished is described in the following description which is accompanied by drawings, in which Figure 1 is a central vertical longitudinal section through the rearward portion of a locomotive with the invention illustrated in side elevation;

Figure 2 is an end elevation of the structure shown in Figure l with portions removed;

Figure 3 is a sectional view taken on the line 33 of Figure 2, with parts in side elevation;

Figure 4 is a sectional view similar to Figure 3 with the firedoor in open position; and

Figure 5 is a fragmentary sectional View taken on the line 55 of Figure 1.

Referring to the drawings, L indicates a locomotive having a boiler firebox I0 provided with a backwall H. Above the level of the cab deck l2. the backwall II is apertured at l3 to provide an opening whereby access to the interior of the firebox l0 may be gained.

Extending upwardly and forwardly from beneath the cab deck i2 is a stoker discharge conduit M, communicating at its upper forward end with the firebox H) through the opening i3. A conveyor screw H3 is rotatably mounted in the conduit i i and delivers fuel to a distributor D comprising a jet head It adapted to issue blasts of pressure fluid over the distributor plate H. The jet head it and distributor plate are secured in known fashion to the front wall I8 of the discharge conduit l4.

ihe discharge conduit M at its upper portion includes a rear wall I9 and side walls 20, 2|,

0 terminating in a common horizontal plane disposed approximately centrally between the upper and lower edges of the firing opening l3. Formed with the forward end of the discharge conduit I4 is a flange 22 which embraces the firing opening l3 and is secured to the backwall H by 5 bolts 23. Above the horizontal plane of the top terminal edges of said rear wall l9 and side walls 29, 2| the inner portions of flange 22 form side members 24, 25 disposed parallel to the backwall II and in close spacial relation therewith. A top wall 26 extends rearwardly and upwardly from the upper portion of flange 22 and its outward end terminates in a downwardly directed lip 21 which extends to the rear of the upwardly extended plane of the conduit rearwall l9. Preferably, the top wall 26 and lip 27 extend laterally for a distance approximately the width of the firing opening l3; the lip 2'1 merging with the flange 22.

It will be observed from Figure 4 that above the stoker conduit I4 there is provided an upwardly directed aperture disposed to the rear of the firing opening l3. This aperture is adapted to be closed by a firedoor F comprising a rearwall 29 parallel to the conduit rearwall l9 and 25 a pair of side portions 30, 3|. A web 32 at the lower edge of the firedoor F joins the side portions Sii, 3| thereof. This firedoor F is telescoped over the upper portion of the discharge conduit I4 and is provided along each side portion 39, 3| with a groove 35a, 3la for engaging a key 20a, 2|a of the conduit side walls 20, 2| respectively. The keys 29a, 2|a extend downward from the top edge of a respective side wall 20, 2|.

When the firedoor F is in a position to close the aperture opposite the firing opening l3, as shown in Figure 3, the upper edges of the firedoor rearwall 29 and its side walls 30, 3| fit against the lip 21, forming a tight closure thereat. The lower portions of the side walls 3|], 3| and the rearwall 29 remain in overlapping relation with the corresponding walls of the stoker discharge conduit it, while the forward edges of the side portions 33, 3| abut against side members 24, 25, respectively, thereby completely closing the aperture opposite the firing opening i3. In order to protect the firedoor rearwall 29 from the intense heat within the firebox H],

a perforated bafile plate 32a. is secured thereto by bolts 33. The firedoor rearwall 29 is also provided with a vision box 34 for observing fire conditions and also for entraining cooling air currents over the baffie plate 320;. Immediately above the vision box 34, the firedoor F is provided with a handle utilized to open the firedoor by manual means.

Ordinarily, however, the firedoor F is operated by power means P comprising a cylinder 36 which houses a fluid operated piston 31. One end of a rod 38 is connected to the piston 31 while the opposite end thereof is connected at 50 to a pair of lugs 55 depending from the Web 32 of the firedoor F. Pressure fiuid is admitted against the upper side of piston 31 by means of a pipe 52 leading from a suitable source of fiuid power. Admission of pressure fluid into the cylinder 36 causes downward movement of the piston 31 and the firedoor F.

At each upper forward side of the stoker conduit I 4 is a pulley 39, 40 over which a cable 4|, 42 is trained. One end of each cable 4|, 42 is attached to a side portion 30, 3| of the firedoor while the opposite end is attached to a plunger 43, 44 mounted in a tube 45, 46, respectively. The combined weight of the plungers 43, 44 is slightly greater than the weight of the firedoor F so that in the absence of pressure fiuid reacting on the upper side of piston 31, the plungers 43, 44 will descend to the position shown in Figure 3, causing the firedoor F to be drawn upwardly to closed position.

When the firedoor F is thrown open, an aperture opposite the firing opening I3 is formed permitting unrestricted access into the firebox Ill. It. will also be understood, that, since the side portions 24, 25 do not extend a material distance rearward of the backwall II, the fireman may 7 more readily trim the fire. Trimming of the fire,

which includes a levelling thereof and breaking up or removing clinker formations, is accomplished by inserting a hooked rod into the firebox. By the construction illustrated, the fireman can readily insert the hooked rod into the furnace at any desired angle because it is possible for the rod to be levered at a point closely adjacent the firebox backwall II. this construction also aids in manual firing of the firebox since the fireman may thrust the coal scoop a considerable distance into the firebox forwardly or laterally.

I claim the following as new and useful in the art to which the invention relates:

1. In a locomotive firebox having a backwall with a firing opening therein, the combination comprising a stoker discharge conduit arranged to communicate with said firing opening and having a rearwall and side walls extending above the lower edge of said opening, a frame embracing said opening including a pair of side members and a top wall extending rearward of said side members, a door including a pair of side portions each of which is arranged to fit against a corresponding side member of said frame, and a rearwall arranged to form an approximate upward continuation of the discharge conduit rearwall, the upper portion of said door being open in up- At the same time;

ward extent and the upper edge of the rearwall thereof arranged to fit against the rear portion of the top wall of said frame.

2. In a locomotive firebox having a backwall with a firing opening therein, the combination comprising a stoker discharge conduit arranged to communicate with said firing opening and having a rearwall and side walls extending above the lower edge of said opening, a frame embracing said opening including a pair of side members the rear edge of each of which is disposed closely adjacent the plane of said firebox backwall and a top wall extending rearward of said side members, a door including a pair of side portions each of which is arranged to fit against a corresponding side member of said frame, and a rearwall arranged toform an approximate upward continuation of the discharge conduit rearwall, the upper portion of said door being open in upward extent and the upper edge of the rearwall thereof arranged to fit against the rear portion of the top wall of said frame.

3. In a locomotive firebox having a backwall with a firing opening therein, the combination comprising a stoker discharge conduit arranged to communicate with said firing opening and having a rearwall and side walls extending above the lower edge of said opening, a frame embracing said opening including a pair of side members and a top wall extending rearward of said side members, a door telescopically related with respect to said discharge conduit and including a pair of side portions, each of which is arranged to fit against a corresponding side member of said frame, and a rearwall arranged to form an approximate upward continuation of the discharge conduit rearwall, the upper portion of said door being open in upward extent and the upper edge of the rearwall thereof arranged tofit against the rear portion of the top wall of said frame.

4. In a locomotive firebox having a backwall with a firing opening therein, the combination comprising a stoker discharge conduit arranged to communicate with said firing opening and having a rearwall and side walls extending above the lower edge of said opening, a frame embracing said opening including a pair of side members the rear edge of which is disposed closely adjacent the plane of said firebox backwalland a top wall extending rearward of said side members, a door telescopically related with respect to said discharge conduit and including a pair of side portions each of which is arranged tofit against a corresponding side member of said frame, and a rearwall arranged to form an approximate upward continuation of the discharge conduit rearwall, the'upper portion of said door being open in upward extent and the upper edge of the rearwall thereof arranged to fitagainst the rear portion of the top wall of said frame.

JOSEPH J. KRESS.

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