Underfeed stoker

May 22, 1934. e. a. turner 1,960,072

UNDERFEED STOKER Filed Oct. 25, 1930 3 Sheets-Sheet 1

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May 22, 1934. e. a. turner 1,960,072

UNDERFEED STOKER Filed Oct. 25, 1930 3 Sheets-Sheet 3

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Patented May 22, 1934

1,960,072

UNITED STATES PATENT OFFICE

1,960,072

UNDERFEED STOKER

Edwin Archer Turner, New York, N. Y., assignor to The Standard Stoker Company, Incorporated, a corporation of Delaware

Application October 25, 1930, Serial No. 491,109

Claims. (Cl. 110—44)

My invention relates to underfeed stokers and particularly to underfeed stokers for locomotives.

It is an object of this invention to provide a stoker of the type described which combines the advantages of simplicity, ruggedness, compactness and economy of construction, and convenience of repair and replacement of parts.

Another object of the invention is the provision in stokers of the type described of an improved 10 fuel receptacle and means for conveying fuel from the receptacle.

To the above and other ends the invention consists in the arrangement of parts and in their relation and association one with the other or 15 in combination as hereinafter described and as illustrated in the accompanying drawings, in which

Fig. 1 is a central longitudinal vertical section through a portion of a locomotive showing the 20 stoker mechanism in place in like section;

Fig. 2 is a section on the line 2—2 of Fig. 1;

Fig. 3 is a section on the line 3—3 of Fig. 1;

Fig. 4 is a section on the line 4—4 of Fig. 1;

Fig. 5 is a diagrammatic plan view of a modi25 fled form of a portion of the stoker;

Fig. 6 is a section on the line 6—6 of Fig. 5;

and

Fig. 7 is an end view of the modified form of the stoker.

My improved stoker is applicable to locomotives and particularly locomotives of the switcher type and for the purpose of best illustrating the invention it will be so described, but its use is not limited to such application for it is equally appli35 cable in other furnaces of like conditions.

Referring now to the drawings, the locomotive is indicated generally at 10, its main frame at 11, its firebox at 12 having a backhead 13 with a hand firing opening 14 therein.

Beneath the deck 15 of the locomotive is a fuel hopper 16 divided into the fuel compartments 17 and 17α by the partition wall 18. A cover 19 for the hopper 16 is formed in the deck 15 and is hinged as at 20 and 21 so that one half of the cover 19 may be thrown back or the entire cover thrown back as desired. The hopper 16 is supported from the locomotive main frame 11 by the foot members 22.

The fuel conveying mechanism comprises the 50 conduits 23 and 24 which communicate with the hopper 16 and extend forwardly therefrom beneath the boiler mud ring 25, terminating in the magazines 26 and 27 respectively which open upwardly and deliver fuel to the firebox 12 through 55 apertures in the grate 28. The conduits 23 and are disposed one below the other, the conduit 24, delivering fuel to the forward portion of the firebox, being below and supported from the locomotive main frame 11 by the foot members 29, and the conduit 23, delivering fuel to the rear- 60 ward portion of the firebox, being above and supported from the conduit 24 by the bracket 30. The conduit 24 communicates with the compartment 17α, and the conduit 23 communicates with the compartment 17 of the hopper 16. The screw 65 conveyors 31 and 32 disposed in the conduits 23 and 24 respectively extend rearwardly into the compartments 17 and 17α respectively and advance fuel to and through the magazine 26 and 27 respectively, into the firebox. 70

The screws 31 and 32 are driven from their rearward ends by gearing housed in the casing 33, which is preferably formed as an integral part of the hopper 16. The gear casing 33 is provided with a removable cover 34 to permit ac- 75 cess to the gearing. The screw shaft 35 transmits motion to the screw 31 and is mounted in the bearings 36 and 37 which are formed as an integral part of the partition wall and rear wall respectively of the hopper 16. The screw shaft 80 38 transmits motion to the screw 32 and is mounted in the bearing 39 which is formed as an integral part of the rear wall of the hopper 16.

Motion is transmitted from a motor 40 to a drive shaft 41 carrying the worm 42 which en- 85 gages the worm gears 43 and 44 on the shafts 35 and 38 respectively. The shafts 35 and 38 are mounted in the roller bearings 47 and 48 respectively disposed in the removable cover 34. Clutch members 49 and 50 are slidably mounted on the 90 shafts 35 and 38 respectively and are prevented from rotating about said shafts by the keys 51 and 52. The adjacent faces of the clutch members 49, 50 and the worm gears 43, 44 are provided with complementary teeth 53 arranged to 95 engage each other as shown in Fig. 1 whereby motion is transmitted to the' screw conveyors 31 and 32.

One or both of the screw conveyors 31, 32 may be thrown out of operation by disengaging the 100 teeth 53 by sliding the clutch members 49, 50 along the keys 51 and 52 respectively away from the worm gears 43 and 44 respectively. The fork members 54, 55 are held in engagement with the clutch members 49, 50 respectively by the shoul- 105 ders 56, 57 on the clutch members 49, 50 respectively. The fork members 54, 55 are operated through the handles 58, 59 respectively, so that movement of the handle 58 backward or forward throws the clutch member 49 out of or into en- no >,072 the vertical axes of said magazines lying in the same plane formed by the vertically aligned axes of said screws.

3. In a locomotive having a cab deck, a firebox and grates therefor, the combination of a 80 fuel hopper beneath said cab deck, means arranged for the introduction of fuel inti said hopper, a partition wall dividing said hopper into a plurality of compartments, a plurality of fuel conduits each communicating with and extending 85 forwardly beneath the firebox from a respective hopper compartment, a screw in each of said conduits, bearings for each of said screws in the rear wall of said hopper, said partition wall having an opening in horizontal alignment with one 90 of said bearings, gearing at the rear of said hopper for transmitting motion to said screws and clutch mechanism for throwing one or more of said screws into or out of operation, a casing formed integral with said fuel hopper for hous- 95 ing said gearing and said clutch mechanism, a plurality of openings in said grate, and magazines directly connecting said openings and said fuel conduits.

4. In a locomotive having a cab deck, a fire- 100 box and grates therefor, the combination of a fuel hopper beneath the deck, means arranged for the introduction of fuel into said hopper, a partition wall dividing said hopper into two compartments, fuel conduits each communicat- 105 ing with and extending forwardly from a respective compartment beneath the firebox, a screw in each of said conduits extending rearwardly into each of said fuel compartments, ririvp mechanism for operating said screws, bear- jpj i-ngs for one of said screws formed in the partition and rear wall of said hopper, a bearing for the other of said screws formed in the rear wall of said hopper, openings in said grate, and magazines directly connecting said openings and said jjg fuel conduits.

5. As a new article of manufacture a fuel hopper having rear, front, side and bottom walls, a hinged cover, a partition wall dividing said hopper into two compartments, openings in the J20 front wall of said hopper each coimnunicating with a respective compartment, bearings formed in the partition and rear wall of said hopper in horizontal alignment with one of said openings, a hearing formed in the rear wall of said hop- ^25 per in horizontal alignment with said other opening, and a gear housing compartment at the rear of said hopper and formed integral therewith.

6. In a locomotive having a cab deck, a firebox 339 and grates therefor, the combination of a fuel hopper beneath the deck, means arranged for the introduction of fuel into said hopper, a partition wall dividing said hopper into a plurality of compartments, fuel conduits each communicat- 135 ing with and extending forwardly into each of said hopper compartments; a screw conveyor in each of said conduits for advancing fuel therethrough, drive means for operating said screws, bearings for each of said screws in the 340 rear wall of said hopper, said partition wall having an opening in horizontal alignment with one of said bearings, openings in said grate, and magazines directly connecting said openings and said fuel conduits. 145

7. In a locomotive having a cab deck, a firebox and grates therefor, the combination of a fuel hopper beneath the deck, means arranged for the introduction of fuel into said hopper, said hopper comprising front, rear, side and bottom 150 ι,9βί gagement with the worm gear 43 and likewise movement of the handle 59 backward or forward throws the clutch member 50 out of or into engagement with the worm gear 44.

A modified form of the invention is shown in Figures 5, 6, and 7, wherein the conduits 23 and 24 terminate in a pair of branching magazines 26α, 26α’, and 27α, 27α', enabling fuel to be spread over grate surfaces of larger area.

in operation, the hinged cover 19 is opened and a supply of fuel is manually supplied into the hopper 16, the fuel is then advanced from the hopper compartments 17, 17α through the conduits 23, 24 by the screws 31, 32 and urged up15 wardly through the magazines, 26, 27 into the firebox. It will be understood that the fuel may be supplied into the hopper by power means if desired. The magazines are made flaring so that their upper ends are larger than their lower ends, 20 for the purpose of effecting a loose and free delivery of fuel into the firebox. The magazines are shown as being inclined slightly forward to permit the fuel to be advanced therethrough more readily, however, such a construction has a 25 tendency to deliver more fuel forward of the magazine than rearward thereof. Inwardly curving vanes 60 are provided on the inner sidewall-. of the magazines toward the rear thereof to deflect a portion of the fuel-rearwardly where30 by an even distribution of fuel may be obtained.