US1497014A - Automatic stoker - Google Patents

Description

June 10, 1924;

W. T. HANNA AUTOMATIC STOKER 1920 4 Sheets-Sheet 1.

Filed Dec.

m mm

uBume l0 1 924. I I

W. T. HANNA AUTOMATIC 'YSTOKER Filed Dec. 11'; 1920' 4 Sheets-Sheet 2 June-10,1924. Y Y 1,497,014

' W. T. HANNA AUTOMAfP IC STOKER- Filed Dec. 11, 920 4 sheets-sheet 5 June 10, 1924. 1,497,014

W. T. HANNA AUTOMATI C STOKER Filed Dec. 11 1920 4 Sheets-Sheet 4 To all whom it may concern:

Patented June 10, 1924.

WILLIAM T. HANNA, or CINCINNATI, OHIO.

AUTOMATIC STOKER.

Application filed. December 11, 1920. Serial No. 430,020.

Be it known that I, WILLIAM T. HAN NA, a citizen of the United States of America, and resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented I a new and useful Improvement in Automatic Stokers, of which the following is a specification. Y

An object of my invention is to provide a compact and efficient stoker especially adapt? able to locomotives, that may be readily mounted on a locomotive.

Another object is to provide a device of the type referred to andfor the purpose stated in which substantially all of the driving mechanisms aredisposed below the floor of the engine cab.

These and other objects are attained by the means described herein and disclosed in the accompanying drawing in which Fig. 1 is an elevation taken on line 1 -1 of Fig. 3, parts being broken away and showing I a device embodying my invention, mounted on a locomotive.

Fig. 2 is a sectional view on line 2.2 of Fig. 1.

Fig. 3 is a side elevational view, looking to the right on Fig. 1, parts being broken Fig. 4 is an enlarged sectional view on line 44 of Fig. 2. Fig. 5 is an enlarged sectional view on line 55 of Fig. 4. i v -The stoker of my invention comprises a housing A, which surrounds the usual firing opening, a fuel conduit a, which enters the lower end of the housing, a feeder D which carries fuel to the fuel conduit from the tender E and forces it upward in the conduit, andelevating and distributing mechanism in housing A. Housing A contains within it the elevating conveyors a and a tothe lower ends of which conveyors the fuel is fedby the conveyors E and D. The housing together with the elevating conveyors are adapted to be mounted about and adjacent to the door of the locomotive fire box. Housing A is preferably pearshaped having upwardly and outwardly diverging sides and is secured upon'the boiler C of the locomotive C above the cab floor 0 by any-suitable means such as bolts a, and has a' secondary firing opening a -in its rear wall a and an aperture a formed in the "front wall, a of the housing. The aperture a and secondary firing opening a} are substantially in horizontal alignment with .the primary firing opening 0 in the boiler,

which is located in alignment with the longitudinal centerline of the grate 0 Contained within the housing A and disposed between the rear wall a? and the forward wall a thereof are the elevating conveyors a .and a. The forward wall a of housing A engages and is mounted upon therear outer wall 0 of the boiler C. The

elevating ,conveyors comprise the' tubes a and a forming partof housing A andthe spiral screws a and a rotatably mounted therein. The spiral screws are driven by any suitable means such as the driving mechanism B that is preferably disposed below the cab floor 0 The driving mechanism may be of any type adapted to impart rotatory motion. The drive mechanism B has extending therefrom a drive shaft b, adapted to revolve the shaft a upon which is mounted the screw a Shaft 0. drives the shaft a" by means of the beveled gears a and a mounted on'the' shafts a" and a respectively by means of the'keys a. The

beveled gears a and a are contained within the supplemental housing a formedv at the base of the, housingA and thru which 'theshafts a and a". extend. The spiral screws are mounted fixedly on the shafts a and .a. by means of the pins a whereby the shafts a and a" and the screws a and a are operated in unison from a common driving mechanism. The supplemental housing a forms a base or bottom'for the tubes a and a and is formed integral with the conduit a. A plate a is secured to the base of the supplemental housing a and forms a closure for thechamber a within which the gears a and a are contained.

The shaft a extends thru.the plate or to aj point without the housing A at which it is attached to drive shaft?) of the drive .mechanism B by means of a universal joint b An end-bearing a is mounted upon the plate a within the chamber a and serves as an abutment for shaft a and the gear mounted thereon. The upper ends of the tubes at and a." are enlarged and have angular shoulders a formed thereon. The inner and bottom edges a of the shoulders a extend over the adjustable distributing chutes a and'oi mounted on the rocking shafts a and a which shafts are carried by the housing A. The chutes are controlled by means of the arms a and a having sleeves rotatably mounted on shafts a, and a Lug plates a and a are carried by arms a. and a andmay be engaged by lugs formed on the handles a and a said handles having hubs mounted on the shafts a" and a When it is desired to render the chutes inoperative, the lugs are disengaged from the lug plates, wherefore when the handles are rotated, the chutes may be swung clear of the shoulders at so as not to interfere. with hand stoking thru the housing and the primary feeding openin The chutes may be oscillated above their pivotal mountings by means of the controlling device A to the reciprocating shaft R of which, the arms a and a are pivotally connected by suitable links 0 and 1- The lug plates are provided with spaced slots a in which the handles may engage, as shown in Fig. 5, whereby to transmit motion between the handles, and to vary the arcs thru which the chutes a" and a may be oscillated. Further explanation of the chutes is deemed unnecessary as the action thereof is fully explained in my copending application Serial Number 308,851 and need not therefore be more specifically described herein. The Ways or bores formed in tubes a and a communicate adjacent their lower ends with the conveyor D by means of the conduit a. A casing a is secured to the supplemental housing a and extends below the cab floor 0 and provides the lower terminus of the conduit a. A ball and socket joint a connects the rear end of the casing 0. and the forward end of thecasing d that surrounds the conveyor screw d An observation door a is formed in the rear of the housing A immediately below the opening a such door opening into the tubes a and a at their bases. A plate at is adapted to form a closure for the observation door. By means of .the observation door, the operator can watch the fuel fed to the furnace and can remove any slack or other non-combustible or deleterious material. Apertures a, see Fig. 4, are formed in the sides of the casing, adjoining the base of the tubes a and (1 to facilitate assemblage and to facilitate removing of any obstructions in the tubes. The plates a" form closures for the apertures a.

The conveyor D comprises a tubular casing at within which is mounted a spiral screw d. The conveyor E comprises the tubular casing a mounted on the tender E and which communicates with'the supply of fuel in the tender in any manner common in the art'and a spiral screw 6 is revolubly and centrally mounted withinthe tubular casing e in any manner well known in the art. The conveyors are disposed below the cab floor 0". The tubular member e is adapted to be connected with and to extend into the rear end of the tubular casing d of the conveyor D, in a manner well known in the art. The spiral screw d is connected with the spiral screw by means of a universal joint (i The spiral screw e is driven by means of gears 6 mounted on the tender, one of said gears 0 being driven by drive shaft e which shaft is connected by universal joint e to the driving shaft 0 which shaft is connected by a universal joint 6 to the driving mechanism B. The second gear is mounted on the shaft carrying the spiral screw 6 Mounted between the housing A and the rear wall of the boiler C and extending thru the primary firing opening is the distributor plate 7". Mounted adjacent and extending over the distributor plate f are a series of ejector nozzles 7 adapted, together with the distributor plate, to feed the fuel evenly over the bed of the furnace which nozzles are preferably of the type illustrated and ex plained in my copending application, Serial Number 377,226, and which therefore require no further explanation or description. The doors G are pivotally mounted on the housing A and normally close the opening a in the housing. The doors are provided at their upper ends with meshing gear segments, whereby when one of the doors is rotated about its pivotal mounting, the other door is also rotated. -Any suitable means such as a lever g fastened to one of the doors may be employed to open and close the doors. The doors may be opened either manually'or automatically, as described in my said copending application.

In operation the screws 6 and d carry the fuel from the conveyor D and force it thru the conduit a and into the tubes at and a The shaft a is rotated by the drive mechanism B whereby the spiral screws mounted within the tubes a and a carry the fuel upward thru the tubes a and 05 and push the fuel over. the shoulders a whereupon the fuel falls upon the chutes a and 0 and is guided by means of the chutes to the desired position above the distributor plate f and the ejector f As the fuel falls upon the ejector and the distributor plate, thefuel is carried by jets of air or steam to various parts of the grate of the locomotive.

Should the stoker fail, the chutes may be swung to an inoperative position as here'- tofore described and the boiler can be fired thru the aperture e in the housing and thru the firing openings in the boiler and housing.

As an auxiliary means adapted to cooperate with theconveyors E and D, in moving the fuel thru the conduit a, I provide a blast nozzle or series of nozzles h which extend into theconduit a, and by means of which a blast of air or steam may be introduced into the conduit (1? to assist in conveying the fuel upward thru the conduit and into the elevating conveyors in the housing A.

What I claim is: 1. In a locomotive Stoker the combination of a fire-box, having a firing opening located in alignment with its longitudinal axis, ahousing embracing'thefiring open-. ing, a distributing plate mounted adjacent,

the housing and extending into'the firing opening, achute mounted pivotally within the housing and adapted to direct fuel to the distributing plate, and means within the housing for feeding fuel to the chute. 2. In a locomotive stoker thecombination with a fire-box having a primary firing opening, of a housing having an aperture in its forward wall registering with the primary firing opening,-a distributor plate extending into the primaryfiring opening, a chute mounted pivotally within the housing and projecting over the distributor plate, andmeans within the housing for feeding fuel to the chute.

3. In a locomotive stoker the combination with. a fire-box, having a primary firing opening, of a housing having an aperture in its forward 'wall registering with the primaryfiring opening, a distributor plate extending into the primary, firing opening, a

7 chute mounted pivotally within the housing and, projecting over the distributor plate,

means within the housing for feeding fuel to the chute andmeans to supply fuel to the fuel feeding means. I

4. In a locomotive stoker the combination with a fire-box, having a primary firing opening, of a housing having an aperture in its forward wall registering with the primary firing opening, elevating conveyor within the housing adapted to carry fuel from the base of the housing to points near the top thereof, and a chute pivotally mounted-within the housing adapted to direct fuel from the top of the conveyor thru the aperturein the housing and thru the primary firing opening.

5. In a locomotive stoker the combination with a fire-box, having. a primary firing opening, of a housing having an aperture in its forward wall registering with the primary firing opening, and having a secondary firing opening in its rear wall and in substantial alignment with the primary firing opening and the aperture, an elevat-.

mg conveyor within the housing adapted to carry fuel from the base of thehousing to points near the top thereof, and a chute pivotally mounted within the housing adapted to direct fuel from the top of the conveyor thru the aperture in the housing and thru the primary firing opening.

6. In a locomotive stoker the combination with a fire-box, having a P imary opening, of a housing having an aperture primary firing opening, and having a secondary firing opening in its rear wall and in substantial alignment with the primary firing openingand the aperture, an elevating conveyor within the housing adapted to carry fuel from the base of the housing to pointsnear the top thereof, a chute pivotally mounted within the housing adapted todirect fuel from the top of the conveyor thru the aperture inthe housing and thru the primary firing opening, and means to feed fuel to the elevating conveyor.

7. In alocomotive stoker the'combination of a fire-box having a primary firing opentributor plate extending into the primary firing opening, a chute mounted pivotally within the housing adapted to direct fuel to the distributor plate and means within the housing for feeding fuel to the chute. 8. In a sto-ker mechanism, the combination of a fire-box having a firing opening in its wall, a housing mounted adjacent to and extending about the firing opening, an ejector mounted adjacent the firing opening and adapted to direct fuel into the fire box, a chute mounted pivotally within the housing adapted to direct fuel to the ejector and means within the housing for feeding fuel to the chute.

/ 9. In a stoker mechanism the combination of a fire-box having a firing opening in its ing, a housing embracing the firing opening wall, a housing mounted adjacent to and housing for feeding fuel to the chute.

10. In a stoker mechanism the combination of a housing having a chamber, adapted to be mounted adjacent toand to embrace a firing opening, the housing having upwardly extending ways formed in it, the ways extending above the firing opening and communicating at their tops with the chamber, pivotally mounted ehut'eswithin the chamber projecting below the tops of theways, a supplemental housing below the first mentioned housing having a fuel conduit communicating with the lower ends of the ways, a revoluble drive shaft extending thru the supplemental housing into one of the ways, a driven shaft extending into the supplemental housing and into a second'one of the within the ways mounted upon the drive and driven shafts.

11. In a stoker mechanism the combination of a housing having a chamber therein, adapted to be mounted adjacent to and to embrace a firing opening, and having up- .wardly extending ways formed in it, theways extending above such firing opening and communicating at their tops with the chamber, pivotally mounted chutes within the housing projecting below the tops of the ways, a supplemental housing forming a base for the first mentioned housing, having a chamber formed within it, the supplemental housing having a fuel conduit formed in it, the fuel conduit communicating with the lower ends of the ways, a revoluble drive shaft extending thru the walls of the supplemental housing and the chamber therein, and projecting into one of the ways, a driven shaft extending thru a wall of the supplemental housing projecting into the supplemental housing chamber and into a second oneof the ways, means within the last mentioned chamber adapted to transmit motion from the drive shaft to the driven shaft, and means to rotate the drive shaft.

12. In a locomotive stoker the combination of a fire-box, having a firing opening located in alignment with its longitudinal axis, a housing embracing the firing open; ing, a distributing plate .mounted adjacent the housing and extending into the firing opening, a pivotally mounted chute within the housing and adapted to direct fuel to the distributing plate, means withinthe housing for feeding fuel to the chute, andmeans to oscillate the chute about its pivotal mounting.

13. In a locomotive stoker the combination with a firebox having a firing opening, of a housing having an aperture in its forward wall registering with the firing opening, a distributor plate extending into the firing opening, a pivotally mounted chute within the housing and projecting over the distributor plate, means within the housing for feeding fuel to the chute, and means to oscillate the chute about its pivotal mount- I4. In a locomotive stoker the combination with a firebox, having a firing opening, of a housing having an aperture in its for-v ward wall registering with the firing opening, a distributor plate extending into the cember, 1920.

firing opening, a pivotallvmounted' chute within the housing and pro ecting over the distributor plate, means within the housing for feeding fuel tothe chute, means to supply fuel to the fuel feeding means, and means to oscillate the chute about its pivotal mounting.

15. In a stoker mechanism the combination of a furnace having a firing opening in itsiwall, a housing mounted upon the. exterior of the furnace and embracing the firing opening, means associated with the. furnace and the housing for feeding fuel to the fur- 'nace by way of the firing opening therein, a

' adapted to direct fuel to the distributor plate, means within the housing for feeding fuel to the chute, and means to oscillate the chute about its pivotal mounting.

17. In a stoker mechanism the combination of a housing having a chamber, adapted to be mounted adjacent to and to embrace a firing opening, the housing having upwardly extending ways therein communicating at their tops with the chamber," ivotally mounted chutes within the chem er projecting below the tops of the ways, a supplemental housing. having a fuel conduit communicating with the lower ends of the ways, a revoluble drive shaft extendin thru the supplemental housing into one 'o the ways,

a driven shaft extending into the supple mental housing and intoa second one ofthe ways, means within the supplemental housing for transmitting motion from the drive shaft to the driven shaft, and spiral screws within the ways mounted 'upon the drive and driven shafts. v 4 I In testimony whereof, I have hereunto subscribed my name this ninth day of De- WILLIAM '11. Hanna.

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