US 1730616 A
Description (OCR text may contain errors)
Oct. 8, 1929. LOWER ET AL 7 1,730,616
STOKER MECHANI SM Filed Feb. 26, 1926 5 Sheets-Sheet 1 ii fnyewzons,
Oct. 8, 1929.
N. M. Low'ERrr AL STOKER MECHANISM Filed Feb'. 26, 1926 5 Sheets-Sheet 2 L l .J
Oct. 8, 1929. N. M. LOWER ET AL STOKER MECHANISM 5 Sheets-Sheet Filed Feb. 26, 1926 [2? m n-60m W xy/flower,-
O h 1929- V N. M. LOWER ET AL I 1,730,616
' STOKER'MECHANISM Filed Feb. 26, 1926 5 Sheets-Sheet 4 Oct. 8, 1929. N. M. LOWER ET AL STOKER MECHANISM 5 Sheets-Sheet Filed Feb. 26. 1926 in van 60215. afmu/Ziawe W/yIZZ/ C L Patented Oct. 8,
' UNITED STATES PATENT OFFICE NATHAN m. LOWER AND PAUL A. KETCHPEL, or rrrrsnuncrr, PENNSYLVANIA, As-
SIGNORS, ,BY ,MESNE AssrGNME rs, 'ro THE STANDARD s'roxnn COMPANY IN(:., or NEW YORK, Y., .A CORPORATION or DELAWA E STOKER MECHANISM Application fi led 'ttebruary 26,1926, Serial 110.. 90,717.
This invention relates to stokers, and more particularly to mechanical stokers and means for controlling the operation of the same.
One of the objects of the invention is the provision of new and improved means for controlling the relative amounts of fuel delivered to different portions of the firebox.
Another-object of the invention is the PI'O". vision of a reciprocating elevator with new 1 and improved mechanism for selectively delivering fuel to said elevator at each cycle or each alternate cycle of movement of the elevator as may be desired.
A further object of, the invention is the provision of new and improved stoker mechanism that is simple in construction, efficient in operation, cheap in manufacture,
easily assembled, and that is not likely to become broken or get out of order. p
Other and further'objects and advantages of the invention will appear from the following description taken in connection with the accompanying drawings, in which I Fig.1 is a side elevation of a portion of the stoker mechanism, with parts in section and parts broken away;
Fig. 2 is a vertical section on line Fig. 1;
Fig. 3 is a plan view of a portion of a stoker showing the backhead of the locomotive in section, with parts broken away;
Fig. 4 is]. a rear elevation of a portion of the vane'operating mechanism; 7
Fig. 5 is a side elevation on an enlarged scale of the clutch mechanism; I
Fig. 6 is a; section on line 66 of Fig. 5; Fig. 7 is a side elevation of a portion of the stoker, showing a portion of the back head of a locomotive in section, with parts broken away; I
.Fig. 8 is a developed view of the radial flanges of the clutch mechanism; and
Fig. 9 is a vertical section of the gear and y journal of one of the fuel delivery vanes.
On the drawings the reference character 10 designates the backhead of a locomotive provided with an opening 11 therein, through which fuel is supplied to the firebox 12 by means of the improved stoker 13,
located at the rear of the backhead.
Y The stok'er 13 comprises a casing 14 in which a plunger 15 is adapted to reciprocate, suitable guides being provided for the plunger. The upper end of the casing has a rearward extension 16 forming an enlarged receptacle or chamber 17. A distributor plate 20 of any approved construction is located over the recess or chamber 17 and has an extension 18 extending through the opening 11 in the backhead 10 of. the locomotive.
Suitable means are provided for operating the plunger 15. As shown, it is operated from the power shaft 19 through a worm 22, gear 23 fast on the shaft 24, gears 25 and 26, the latter being fast on the shaft 28, a crank arm 29 rigidly secured to the shaft 28, and a link 31 connected to said crank arm 29 and to the plunger 15 as at 32. The power shaft 19 is operated in the usual manner by an engine on the side of the stoker remote from the fly wheel 21.
The lengths of the crank arm 29 and link 31 are'such that when the plunger 15 is in its lowermost position the upper surface thereof forms a portion of thebottom wall of the chamber 17. When the plunger is in its uppermost position it extends through a suitable opening 33 in the distributor plate" 20 with its upper surface flush with the upper surface of the distributor late. The distributor plate may be provi ed with walls 34 for forming a receptacle for receiving fuel elevated by the plunger 15.
Suitable means, as the swinging vanes 35 and 36 are provided for projecting the fuel from the distributor plate or member into the firebox. As shown, the vanes are mounted on the shafts 37 upon the lower ends of which gears 38 are secured. The ears are adapted to be oscillated by the toothed quadrants 39 on the upper ends of the arms 41. The arms 41 are pivoted as at 42 and their lower ends are providedwith studs 43 that are adapted to engage the cam way 44 on the cam member of the gears and 26, causing the shaft 28 to rotate twice as fast as the shaft 24. Furthermore, the cam way is so arranged that .the vanes will be moved forwardly at the time the plunger 15 is flush with the distribu-- tor plate. The plunger and vanes operate continuously in timed relation during the operation of the stoker.
' Fuel isdelivered to the chamber 17above the plunger through a suitable conveyor comprising the transfer conduit or casing 46 in which is rotatably mounted the screw 47. The conduit 16 is flexibly connected to the elevator casing as by means of a ball and socket joint 48 which will permit angularmovement of said conduit relatively to the elevator casing. The fuel transfer screw 47 may be operated in any suitable manner, as by means of the shaft 19 geared to the power shaft 19. Its operation is continuous and uniform during the operation of thestoker, thereby causing a continuous stream of fuel to be delivered to the chamber 17.
In the stoking of locomotive and other power plants, it is often necessary to trim the fire at one side of the box to the exclusion of the other. Suitable means are accordingly provided for selectively trimming the fire at either side of the firebox at the will of the fireman or stoker operator.
In the form of the device selected to illustrate one embodiment of the invention, means are provided for interrupting the flow of fuel to the plunger whereby either one or the other of the vanes will not be provided with fuel, as may be desired. This is accomplished by means of a gate or sliding member 51 which may be caused to reciprocate in timed relation to the operation of'the elevator, and at one half of the speed. Since the vanes operate alternately, and continuously at regular intervals, by stopping the flow of fuel to either vane, the other vane will have twice its normal load to distribute, thereby trimming the fire at that side of the firebox. In the present construction, suitable means are provided for operating the gate 51 to obstruct the flow of fuel to either the right or the left vane when it is desired to trim the fire a one side or the other.
The gate 51 is slidably mounted in guideways 50 and is operated by the shaft- 52 through the crank 53 and link 54. i The shaft 52 is operated from the shaft 24 as by means of the chain drive 55. The sprocket wheels 56 and 57-on the shafts 24 and 52 respectively being of the same diameter, the .two shafts will rotate at the same speed, and since the shaft 2 1 rotates at oniy one-half the speed of the shaft 28, when the shaft 52 operates it will cause the gate 51 to operate at one half the speed of the elevator.
The means for controlling the operation of the gate for selectively preventing fuel from being delivered to the right or the left vane, will now. be described. The sprocket wheel 57 is rotatably mounted on thesleeve 58 which in turn is keyed. to and slidably mounted on the crankshaft 52. If desired, a bushing 60 may be secured in the sprocket wheel 57 for loosely engaging the sleeve 58.v
Manually controlled clutch mechanism is employed for clutching the shaft 52 to the sprocket wheel 57 for operating said shaft or for moving the clutch to neutral position.
As shown, the outer end of the sleeve 58 is be operated to prevent the delivery of fuel to 7 one of the vanes during its forward movement, and when the tooth 64 engages the recess 65 on the opposite side of the sprocket wheel 57 the gate 51 will be elevated to prevent the delivery of fuel to the other vane during its forward swinging movement.
Means are provided for shifting the sleeve 58 for engaging and disengaging the clutch mechanism. The clutch mechanism is operated by means of a shifting bar 66 slidably mounted in suitable bearings 67 and provided at its inner end with a yoke 68 which is adapted to engage in the groove 70 in the disk 63. The shifting bar 66 is operated by a pull rod or bar 69 through a bell crank lever 71 pivotally attached to said bar. The upper end of the pull rod 69 is provided with a slot 72 having seats 73 therein for receiving a bolt 74 for holding the rod in adjusted position. The bolt 74: may be provided with a wing nut 75 for clamping the rod for preventing its accidental disengagement from said bolt.
In order that when the clutch is disengaged the gate 51 may not be left in elevated or partially elevated position, suitable means are provided for preventing operation of the clutch except when the gate is in its retracted position.
As shown, the sprocket gear 57 is provided with a hub 76 on the peri hery of which are the radial flanges 77 and 8 (see Figs. 1 and 8). The flange 7 7 ,is provided with a cut-out portion or opening 7 9 and the flange 78 is provided with a cut-out portion or opening 81 located 180 from the opening 79. The shifting bar 66 is provided at its outer end with a radial extension or timer lug 82 which is adapted to pass through the opening 79 clutch mechanism is in neutral and the gate 51 in lowered position.
"When the timer lug 82 has moved outwardly through the opening 79, the clutch will be in the position shown in Fig. 1, and
v the gate 51 will operate to prevent delivery of fuel to theleft vane during its operation. If the timer lug 82 be moved inwardly through the openings 7 9 and 81the tooth 64 will become engaged and the gate 51 will be operated to prevent'the delivery of fuel to the right vane'during its operation.
l/Vhen it is desired to shift the clutch, the wing nut 75-is released and the bar 69 raised or lowered to adjusted position; I
It is thought from the foregoing taken in connection with the accompanying drawings that the construction and operation of our device will be apparent to those skilled in the art, and that various changesin size, shape, proportion and details of construction may be made without departingfrom the spirit and scope of the appended claims.
We claim as our invention: 1. In a stoker, a distributor plate, a'plunger for delivering fuel to said plate, means for operating said plunger, a chamber traversed by said plunger, means for delivering a stream of fuel to said chamber, means for interrupting the flow of fuel to said chamber during alternate reciprocation only of said plunger, and means adapted to distribute said fuel over the grates of a fire box.
2. In a stoker, a distributor plate, aplunger for delivering fuelgto said plate, swinging vanes for projecting the fuel from said'plate, means for delivering a stream of fuel above said plunger while in lowered position, and means operating in timed relation to said vanes for interrupting the flow of said stream. 3. In a 'stoker, a distributor plate, a pair of swingin vanes for throwing fuel from-said plate, an e evator forsupplying fuel to said plate, means for causing a stream of fuel to flow above said elevator, and manually con trolled means for intercepting the flow of said stream. v
4. In a; stoker, a reciprocating elevator, a transfer screw for delivering a continuous stream of fuel to the space traversed by said elevator, manually controlled means for interrupting the flow of said stream at each alternate reciprocation of said elevator to the exclusion-of the other, and means for distributing said fuel over the grates of a fire box.
5. In a stoker, a casing having an enlarged chamber in its upper portion, a plunger in said casing, means for supplying a stream of fuel to said chamber manually controlled means for interrupting the flow of .said
stream at each alternate cycle only in the op- I eration of said plunger, and means for proj ecting said fuel forwardly at each upward reciprocation of said plunger.
6. In combination, a firebox, a distributor member associated therewith, an elevator for delivering fuel to said member, a pair of swinging vanes for projecting the fuel from said member into said firebox, a chamber above sald elevator, means for dehvermg a stream of'fuel to said chamber, and means for interrupting the stream of fuel in timed relation to the swinging of one of'said vanes.
7. In a stoker, a fuel chamber, means for supplying a stream of fuel to-said chamber, a gate for-,interrupting'the flow of said stream to said chamber, mechanism including a clutch'for operating said gate, and means for preventing the disengagement of said clutch except when saidgate is in its inoperative position.
8. In a stoker, a fuel elevator, a fuel conveyor for delivering fuel toysa id elevator, a
movable gate, means including a clutch for operating said gate to prevent the delivery of'fuel to said elevator by said conveyor, and
means for preventing the operation of saidclutch except when said elevator is in a predeterminedposition in its cycle of operation.
9. In combination, a firebox of a boiler having an opening in its back wall, a fixed distributor plate extending into said opening, a pair of fuel projecting means for projecting fuel from. said plate alternately to opposite sides of said firebox, mechanism for supplying fuel to said means, and manually controlled means for intercepting-the supply of fuel to either of said projecting means tothe I exclusion of the other.
.10. Ina stoker, afixed distributor plate, a pair of fuel distributing members for projecting fuel from said plate, means for alternately operating said members, means for automatically supplying fuel on said plate for each of said members, and manually controlled means for intercepting the supply of fuel to said plate for either of said members to the exclusion of the other.
11. In combination, a distributor member, an elevator for delivering fuel to said distributor member, means for operating said elevator, a casing traversed by said elevator,
means for delivering a'fiow of fuel to said casing, means for mtermittently nterrupt ing the flowof fuel to said casing and means for manually controlling the operation of said last named means.
NATHAN M. LOWER. PAUL A. KETGHPEL.
In testimony whereof We aflix our sigma--