US1733746A - Automatic stoker - Google Patents

Description

Oct. 29, 1929. MARTINCICH 1,733,746

AUTOMATI C STOKER Filed July 16, 1927 5 Sheets-Sheet 1 2 INVENTOR:

i m w ATTORNEYS.

Oct. 29, 1929. c, MARTlNclcH I 1,733,746

AUTOMATIC STOKER Filed July 16, 1927 5 Sheets-Sheet 2 fit INV [:ITOFI:

ATTORNEYS.

Oct. 29, 1929 Q Nc c 1,733,746

AUTOMATIC STOKER Filed July 16,1927 5 sheets-sheet s f ,INVENTQR:

Oct. 29, 1929. c. MARTINCICH AUTOMATI C STOKER Filed July 16, 1927 5 Sheets-Sheet 4 INVENTOR:

ATTO R N EYS Oct. 29, 1929. Q c c'H 1,733,746

AUTOMATIC STOKER Filed July 16, 1927 5 Sheets-Sheet 5 a ATTQRNEYS.

I 15 door or other inlet of Patented Oct. 29, 1929 UNITED STATES PATENT OFFICE AUTOMATIC sroxna Application filed July 16,

My invention relates to a new and useful automatic stoker for furnaces and the like and more'particularly, to a stoker adapted to feed solid, pulverized or other fuel such as coal or the like into the fire box of a furnace, automatically and at predetermined intervals and whereby -a uniform distribution of the coalon the fire bed "is assured.

My invention further relates to an automatic stoker adapted to be detachably mounted on the door of a fire box and adapted to be relied upon exclusively for the purpose of replenishing the fuel, at the same time permittingof the independent use of such said fire box for remanner. I

relates to a power and one which is automatic adjustfueling in the ordinary My invention further driven automatic stoker, capable of manual and ment and control.

My invention further consists of various other novel features of construction and advantage as will be hereinafter pointed out in the specification and claims appended hereto.

Forthe purpose of illustrating my invention, I have shown in the accompanying. drawings one form thereof which is at present preferred by me, since the same has beenfound in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my in-'- vention is not limited to the precise arrangement and organization of the instrumentalities as herein shown and described.

Referring to the drawings Figure 1, represents a front elevation of an automatic stoker embodying my invention.

' Figure 2, represents a side elevation of the same.

Figure 3, represents a vertical sectional view on line 3-3 Fig. 2 certain parts-being shown in elevation. I

Figure 4, represents a vertical sectional view on line 4-4 Fig. 3. certain parts being shown in elevation. Figure-5, represents on an enlarged scale 1927. serial No. 206,265.

a perspective view of the internal intermediate valvular element and its adjuncts.

Figure 6, represents on an enlarged scale a perspective View of the upper fuel supporting plate and its coacting valvular element. Figure 7, represents on an enlarged scale a perspective view of the discharge nozzle" in detached position.

Figures 8 and 9, represent detached per-' bottom of which is detachably secured the inner end of the supporting bracket 7 by means of the bolt 8 or the like. The position of the bracket 7 with respect to the door 2 and the bracket 4 is'adjusted by sliding the bolt 8 in i a longitudinal slot in the extension 5, of the bracket 4: (see F igs. 1 and 3) The plate 4 is further provided with the apertured lugs 6, which are adapted to receive the locking pins or bolts 9 passing therethrough and through the upper and lower aligning lugs 11 on the inner edges of the housing or'casing 10, as will be understood from Figs. 1 and 2, 8 and 9. The bracket 7 is provided with the. bearings 12 in which is journalled the driving shaft 13, driven by any suitable'means, and

on the one end of which is fast the gear'14 in mesh with-thepinion 15, which is fast on the propeller shaft 16, journalled in the bearing 17 at one end of the housing 10 andthe bearing in the cap 18 which engages and forms a closure for the other end of the said housing, as will be understood from Figs. 1

and 2.

Fast on the shaft 16, and preferably integral therewith, are a series of vertical disclike members 19 forming-a series of parallel chambers 20, within the housing 10. At right angles to said discs 1'9'and extending the entire length of the housing 10 is the integral propeller blade 21 adapted to revolve with the rotation of the shaft 16, said shaft also transversely bisecting the chambers 20 formed between the parallel vertical discs 19, as will be understood from Figs. 1 and 2.

The, housing 10. extends upwardly to form s the-hopper or reservoir 22, which is adapted to receive a supply of coalfrom any suitable overhead conveyance, such as a belt or bucket chain conveyor or the like, (not shown). In the hopper 22 is secured by means of the bolts 23, the inclined upper fuel supporting tray 24 whose rear or inner end is spaced away from the rear wall of the hopper and is provided at said inner end with the longitudinal, manuallyoperable sliding valve 25 (shown closed in Figs. 2 and 4), which maybe opened or. closed by means of the ratchet 'arm 26, the

v inner end of which detachably engages the ap'ertured lug 31 in the bottom of said valve. The arm 26' is provided on its-under side with 6 the ratchet teeth or serrations 27 for engaging the wallof the aperture 28 through which said arm extends to maintain said valve l in either the closed or open position and to regulate the extent to which it may be desired 25 to open or close said valve to control and reg- I ulate the passage of thecoal. or other fuel therethrough. The sliding member or valve 25 is secured to the member 24 by the pins 29, which areadapted to slide in the slots 30 so (see Fig. 6) when said valve 25 is moved to and fro by the arm 26, engaging the bottom apertured lug 31, which lug is adapted to slide in the slot 32 as will be understood from Figure 6. I 8i Below the tray 24 is disposed the hopper bottom or .plate' 33 having the transverse fuel opening 34 therein, formed between the pendant flanges 35 thereof, and supported in position with respect to the hopper 22 by means of the, side walls 36 and the bolts or I screws 37, as will be understood from F igs. 1. 2, 3 and 4. Above the inner portionof the hopper bottom 33, that is, above the opening 34 is positioned the sliding valve 38, which is normally maintained in position to close the opening34 by the springs 39 confined between the lugs 42 on said bottom plate 33 and the lugs 41 onthevalve 38 as willbe understood from Figs. 1, 2, 39nd 4. The

plate 33 is further provided with the lugs 44 to which is pivoted the upper end of the pendant lever 45, which passes through andengageswan opening 40 in said valve 38fthe withdraw said valve 38 from alignment with the opening 34, against the pressure of the m springs 39, to permit the passage of the coal -througli said opening into the compartments 20 intermediate the discs 19 in the lower housing 10. The lever 45 passes through and guided in the guide slot 40 in the plate 05 '33. The valve 38 is guidedin the ways 47.

said nozzle 51 thus alternatel 5 low er end of said lever 45 being adapted to be engaged and actuated by the cam 46 on the shaft 16, w1th each revolutlon of the latter, to the verti 6 a1 discs 19 in the lower provided at the ends of the member 33 as will be understood from Fig. 5.

The housing 10 is provided with an inwardly extending horizontal extension 43, the inner end of which is adapted to seat within the supporting plate 4 011 the door 2, when the device is assembled, and which carries the lugs 11, above referred to, as will be understood from Figs. 2, 4 and 7. Within the hous-' 'ing extension 43, are disposed the parallel,

longitudinal, guide partitions 48, the inner ends of which are in registering alignment with the vertical disc 19, (see Figs. 4 and 9), said horizontal partitions 48 thus forming therebetween, parallel" channels leading from the chambers 20 into -the interior of the fire box. Near the inner end of the housing 43 is pivoted as at 50 a dis-, charge nozzle 51, from which extend rear wardly the upper and lower links 52 secured to the respective ends of the vertically disposed rocker arm 53, fulcrnmed at 54 and ter-' minating in the lever arm 55. An eccentric pin 56 on the inner face of the gear 14 serves to raise said arm with each revolution of said gear 14, against the tension of the spring 57, engaging the notch58 in the end of said lever 55 and the lower supporting arm or bracket 60 as will be understood from Figure 2. When the lever arm 55 is raised'by the pin 56, the discharge nozzle 51 is tipped or defiected downwardly and when the arm 55 is pulled downwardly by the spring 57 the discharge nozzle is tilted or deflected upwardly, y occupying the positions shown dotted in Fig. 2.

The operation is as follows The hopper 22 is'filled with fuel such as coal from any suitable source (not shown). Any suitable driving means, such as an electric motor or the like may be employed to revolve the gear 14, which incturn revolves the pinion 15 thus imparting a rotary movement to the shaft 16. The rod or arm 26-is then manually pulled outwardly, thus opening the sliding valve 25 of the member 24and permitting the passage of the "coal therethrough.

The arm 26 is maintained in any desired position with respect to the opening 28 by means of the ratchet teeth '27 thereon engaging the H wall of said opening. As the shaft 16 is revolved, the cam 46thereon engages the lever 45 and intermittently opens the valve 38 against the pressure of the springs 39 to permit a given amount -'of fuel to pass therethe coal uniformly over the fire. bed and to pr ent t a c m lation at any one point either within the housing 10 or in the interior of the fire box.

Simultaneously with the rotation of the shaft 16, and blade 21, the pin 56 on inner face of the gear 14 raises the rear end of the lever against the tension of the spring 57 and thus tilts or deflects the discharge nozzle 51' downwardly so that the coal being discharged therethrough is thrown onto the front or foremost portion of the fire bed within the fire box 2. As the gear 14 revolves, the spring 57 pulls the rear end of said lever downwardly and thus deflects the discharge nozzle 51 upwardly, so that the coal being discharged when said discharge nozzle 51 is in this position, is thrown to the rearmost portion of the fire bed thus insuring lateral and longitudinal even distribution of the fuel upon the fuel bed within the fire box. 1 The fire box 2 is also provided with an opening 59 covered with some transparent heat resisting material, so thatthe fire within the fire box may be observed from the outside without the necessity of opening the door 2.

My entire novel device is so hinged to the door 2, of the fire box 1, that in the event of any damage to the mechanism it is merely necessary to disconnect the driving means from the shaft 13 and then to swing the door 2 open on its hinges 3, and feed the coal manually until the necessary repairs have been made. I

It will now be apparent that I have devised a novel and useful construction of automatic stoker which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description and while I have in the present instance shown and described the preferred embodiment thereof which has been found in pracit is to be understood that the same is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

Ilaving thus described my invention what I claim as new and desire to secure ters Patent, is

1. In an automatic stoker for a furnace a hopper, a hopper-bottom having a transversev therein, a housing below saidfuel opening hopper bottom adapted to receive fuel from said hopper, a discharge nozzle for said housing mountedfor rocking movement with respect thereto, a tray above said hopper bottom having its rear edge spaced from. the juxtaposed wall of said hopper to form a transverse opening, a manually operated valve co-a'cting with the rear edge of said hopper bottom,

tray to control the passage offuel through said transverse opening, a sliding valve adapted normally to close the opening in said means for automatically and interm ttently actuating said sliding valve, and means for automatically rocking said by Leton sald shaft and intersecting said vertical discharge nozzle to distribute the fuel discharged therethrough uniformly over the entire surface of the fire bed of said furnace.

2. In an automatic stoker for a furnace, a hopper, a hopper bottom having a transverse fuel opening therein, a housing below said hopper bottom adapted to receive fuel from said hopper, a discharge nozzle for said housing mounted for rocking movement with respect thereto, a tray above said hopper bottom having its rear edge spaced from the juxtaposed wall of said hopper to form a transverse opening, a manually operated valve coacting with the rear edge of said tray to control the passage of fuel through said transverse opening a sliding valve adapte normally to close the opening in said hopper bottom, means for automatically and intermittently opening said sliding valve to regu- Q late the passage of fuel into said housing, means for automatically rocking said discharge nozzle to distribute the fuel discharged therethrough uniformly over the entire surface of the fire bed of said furnace, and means for propelling the fuel through said discharge nozzle.

3. In a device of the character stated, a fuel hopper, a housing below said hopper adapted to receive fuel from said hopper and having a discharge nozzle, a tray in sai hopper above said housing having its rear edge'spaced from the juxtaposed wall of. said hopper to form a transverse opening, a manually operable valve for controlling the passage of fuel through said transverse opening, means for actuating said valve, a hopper bottom positioned below said tray and having an opening therein, a sliding valveadapting, vertically disposed, parallel discs fast on said shaft, a longitudinal propeller blade fast discs and means for revolving said shaft.

at. In a device of the character stated, a fuel hopper, a housing below said hopper adapted to receive fuel therefrom and'having a lower horizontal discharge nozzle, a tray in said hopper having itsrear edge spaced from the juxtaposed wall of said hopper to form a transverse opening, a manually operable valve adapted to close said opening, means for opening said valve, a hopper bottom belowsaid tray having a transverse fuel opening therein,.a sliding valve, yieldable means, normally to maintain said valve above said opening to close the latter, means for automatically opening mined intervals, to permit the intermittent passage of fuel to said housing, means for said valve at predeterpropelling the fuel from said housing through said discharge nozzle comprising a shaft, a longitudinal blade fast 'on said shaft and intersecting said discs and corresponding longitudinal parallel partitions registering with said discs and extending through said horizontal discharge nozzle.

5. In a device of the character stated,

afuel hopper, a housing below said hopper adapted to receive fuel therefrom and having a lower horizontal fuel outlet, a tray in said hopper having its rear edge spaced from the juxtaposed wall of said hopper to form a transverse opening, a sliding opening, means for actuating said valve, a hopper bottom below said trav having a transverse opening therein, a sliding valve, yieldable means normally to maintain said valve above said opening'to close thelatter.

' a pendant lever fulcrumed at its upper end and engaging said sliding valve, a horizontal driving shaft in the lower portion Of'.SillCl housing, transverse, vertically disposed, parallel discs fast on said shaft, a longitudinal blade fast on said shaft and intersecting said discs, means for driving said shaft, a cam on said shaftadapted to engage the lower end of said lever intermittently to open said sliding .valve with each revolution of said shaft to fuel from said hopper to said housing, and longitudinal, parallel partitions having their outerends registering with said discs and ex tending into and through said horizontal fuel outlet to form well defined channels for the passage of fuel discharged throughsaid out-.

let.

6 In a device of the character stated, a fuel hopper, a housing below said hopper adapted to receive fuel from said hopper and having a lower horizontal outlet portion, a tray in said hopper having its rear edge spaced from the juxtaposed wall of said hop- 1 per to form a transverse opening, a valve to control the passage of fuel through said opening, means for actuating said valve, a hopper bottom below said tray having an opening therein, a sliding valve adapted n mally to close ,said opening to prevent the passage of fuel therethrough, means for automatically and intermittently opening said valve, a shaft in the lower portion of said housing, tra nsverse, vertically disposed, parallel discs fast on said shaft, a longitudinal blade fast on said shaft 'and'intersecting said vertical discs,

means for revolving said shaft, and a vertically' adjustable discharge nozzle positioned in said lower horizontal outlet.

7. In a device ofthe characterv stated, a

' fuel hopper, a housing below said hopper adapted to receive fuel therefrom and having valve adapted to regulate the passage of fuel through said permit the intermittent passage ofa lower horizontal outlet, a tray in said hopper having its rear edge spacedfrom the opening, means for opening said valve intermittently and automatically to permit the intermittent passage of fuel through said opeI1- ing from shaft in the lower portion of said housing, transverse, vertically disposed, parallel discs fast on said shaft. a longitudinal blade fast on said shaft and intersecting said Vertical discs adapted to propel said fuel, means for revolving said shaft, a vertically adjustable discharge nozzle pivotally mounted said lower horizontal outlet, and means for rocking said discharge nozzle, tov distribute the fuel discharged therethrough over the entiresurface of the fire bed of a furnace."

. 8. I na device of the character stated, a fuel hopper, a housing below said hopper adapted to receive fuel therefrom and having a lower horizontal outlet, "a tray in said hopper having its rear edge spaced from the juxtaposed wall of said hopper to form a transverse opening, a valve adapted to close said opening, means for actuating said valve, a

hopper bottom below said tray'havingan valve adapted norsaid hopper into said housing, a Y

for a. rocking movement therein, means for rocking said discharge nozzle, to distribute the fuel discharged therethrough over the a entire surface of the fire bed of a furnace, parallel,- horizontally extending partitions havingtheir. outer ends adjacent to and in alignment with said vertical discs and their inner ends projecting through said discharge nozzle, and means said hopper to a support,

9. The combination of fuel hopper, a housing below said hopper adapted to receive fuel therefrom and having a lower discharge outlet, said outlet being in alignment with an opening in said furnace wall, a tray having its rear edge spaced from the juxtaposed wall of said hopper to form a transverse opening, a valve for controlling the passage of fuel therethrough, means for actuating said valve, a hopper bottom below said tray having an opening therein, a sliding valve for said opening, means for autoa furnace aw'all, a

matically and intermittently actuating said valve to permit intermittent passage of fuel therethrough, a shaft in the lower portion of said hopper, discs fast on said shaft, a longitudinal propeller fast on said shaft and in-.' tersecting said discs, means for driving said shaft and a vertically adjustable discharge nozzle mounted Within said outlet opening, and means for rocking said nozzle to distribute the fuel discharged therethrough uniformly over the fire bed of said furnace.

10. The combination of a furnace wall, a fuel hopper, a housing below said hopper adapted to receive fuel therefrom and having a lower horizontal fuel outlet, said outlet being in alignment with a fuel intake opening in said furnace wall, a tray in said hopper having its rear edge spaced from the juxtaposed wall of said hopper to form a transverse opening, a sliding valve coacting with said opening, to control the passage of fuel therethrough, means for actuating said valve, a hopper bottom below said tray having a transverse opening therein, a sliding 5 valve coacting with said opening, yieldable means normally to maintain the valve above said opening to close the latter, a pendant lever fulcrumed at its upper end and engaging said sliding valve, a .pro-

peller shaft in the lower portion of said hopper, means for driving said shaft, vertically disposed, parallel discs fast on said shaft, a longitudinal blade fast on said shaft and intersecting said discs, a cam on said shaft adapted to engage the lower end of said lever intermittently to 0 en said sliding valve, vertical, longitudina ,parallel partitions having their outer ends registerin with said discs and extending into and t rough said horizontal outlet, a discharge nozzle positioned in said fuel outlet and means for rockiriig said discharge nozzle automatically to a 0rd uniform distribution of the fuel discharged therethrough over the entire surface 5 of the fire bed of a furnace. 4

v CILLO MARTINCICH.

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