US1962666A - Stoker fob furnaces - Google Patents

Description

June 12, 1934.

F. v. MoNKosKY sT'oxER Fon FuHNAcEs Filed sept. 29, 1930 5 Sheets-Sheet 1 5 Sheets-Sheet 2 /N VENTO/e F. v. MoNKOsKY STOKER FOR FURNACES Filed Sept. 29. 1930 `lune 12, 1934.

June 12, 1934.v

F. V. MONKOSKY STOKER FOR FURNACES Filed Sept. 29, 1930 ff 2 i E m ,2J-

i 5 Sheets-Sheet 5 F. V. MONKOSKY STOKER FOR FURNACES Filed sept.V 29, 1930 /l/l. /l//l/l/l// INF June l2, 1934.

/N VENTOR A TTORNEY Patented June 12, 1934 STOKER FOR FUBNACES `Frank V. Monkosky, Lakewood, Ohio, assignor, by mesne assignments, to Hugh J. Monson,

Cleveland, Ohio, trustee Application September 29, 1930, Serial o. 484,956

' 2 Claims. (Cl. 110-114) This invention relates to a mechanical stoker which is particularly designed for domestic furnaces, although the device is of general application.

The main object of the invention is to provide a mechanical stoker of the character described which is eflicient and dependable in operation and which consists of few parts which are readily assembled and disassembled and which lare well adapted for quantity production at comparatively low cost.

Another object of the invention is to provide a mechanical stoker of the character described having means for feeding fuel into the furnace.

and a reciprocatory fuel spreader in the form of a ram or plow for distributing the fuel about the firebox.

Another object of the invention is to provide a mechanical stoker for furnaces having a reciprocatory ram adapted to be moved across the furnace flrebox' and a fuel feeding means'for delivering fuel in front of the ram together with means for varying the path of travel of the ram.

Another object of the invention is to provide a Stoker of the character described having fuel feeding means and a reciprocatory ram together with means controlled by the movement of the ram for obtaining` a pulsating draft in the firebox.

Another object of the invention is to provide a mechanical stoker of the character described having fuel feeding means and a reciprocatory ram together with means for delivering air to the furnace through and about the grate whereby to cool the ram and by so doing the air is heated thereby delivering hot air which is desirable for perfect combustion.

Another objet.. of the invention is to provide a vStoker for furnaces of the character described having fuel feeding means and a reciprocatory fuel spreading member together with means for delivering air to the furnace in such a manner as to burn the fine fuel in suspension thereby reducing much of the clinker dimculties, and

' providing more eficient combustion.

Further and more limited objects of the invention will appear as the description proceeds and by reference to the accompanying drawings in which Fig. 1 is a vertical sectional view illustrating the preferred embodiment of my invention; Fig. 2 is a fragmentary vertical sectional view through the conduit through which the fueland air is delivered; Fig. 3 is a horizontal sectional view on the line 3-3 of Fig. 2; Fig. 4 is ahorizontal sectional view on the line 4-4 of Fig. 2; Fig. 5 is a vertical sectional view on the line 5-5 of Fig. 2; Fig. 6 is an end- View of the conduitY through which the fuel and air are delivered; Fig. 7 is a fragmentary vertical sec- 0 tional view similar to Fig. 2 disclosing the ram in the forward position; Fig. 8 is a view similar to Fig. 'I` disclosing the ramin the position in which it will appear when an attachment is used for reciprocating the ram -horizontally 05 across the rebox; Fig. 9 is a perspective view of the attachment which is used to vary the path of lmovement of the ram; Fig. 10 is a perspective view disclosing the attachment which is used when it is not desired to vary the path of travel of the ram; Fig. 11 is a vertical sectional yview of the castings forming the base member; Fig. 12 is a horizontal sectional view on the line 1 2-12 of Fig. 11; and Fig. 13sis a somewhat diagrammatic view of the circuit and mechanism for stopping the ram in the rearward position.

Referring now to the drawings, the stoker consists of a base member which is formed of three castings l; 2 and 3, which are secured 80 together by suitable bclts and supported on a plurality of legs. The casting l is provided with la ared'portion 4 adapted Yto receive a hopper 5 therein. Journaled between the castings 2 and 3 is the horizontally disposed shaft 85 6 on which is non-rotatably secured a worm '1. Non-rotatably secured on one end of the shaft.6 is a pulley 8. Journaled in the castings 2 and 3 is a shaft 9 on which is non-rotatably secured a worm wheel 10 which meshes with and 90 is driven by the worm 7. Non-rotatably secured on the opposite ends of the shaft 9 are disks 12 and 13, the purpose of which will hereinafter appear. The casting l is.a1so provided with the ange or shoulder 14 over which is secured a 95 casing or conduit 15 which is shaped as shown most clearly in Fig. 5. Fitting within the outer end of the casing 15 is a casting 16 which is shaped as shown in Figs, 4 and 5 and which is providedwith a pair of upstanding ribs orpro- 10o iections 17 and 18. l The casting 16 is also provided with a bottom portion 19 which extends rearwardly into the outer casing 15 and is provided with an upstanding boss 20 having a square opening therein. The casting 16 is also provided 105 with a Vpair of oppositely disposed ribs or projections 21, 21a.

mounted within the conduit 22 is a fuel feeding bar 23 the upper surface of which is serrated as s hown at 24. The opposite end of the fuel feeding member 23 extends through an opening provided in a depending boss 1a formed on the casting 1. Connected with this end of the feeding member is a link or crank 25, one end of which is connected to the bar 23 by means o'f a bolt 26 and the other end of which is adjustably connectedwith the disk 12 by means of a Ybolt 27 and a serrated lug 27 which engages a serrated portion provided on the disk 12. Fitting within the end of the casting 16 is a reciprocatory ram 28 which is preferably formed of cast iron and is shaped as shown most clear-- ly in Figs. 2, 3 and 4. The ram 28 has a rearwardlyy projecting portion or shelf 29 and a forwardly extending outwardly tapered nose portion 30. The lower end of the nose portion 30 is provided with a plurality of openings 31. Arranged within the lower portion of the casing 15 is a reciprocatory bar 32 which is preferably square in cross section, and one end of which projects through a similarly shaped opening in a boss 1b provided on the casting 1. vThe opposite end of the bar 32 projects through a square openingprovided in the boss 20 formed on the fse;

casting 16. The bar 32 is pivotally connected to the ram 28 by means of 4a pin 34. Secured to the opposite end of the bar 32 is a crosshead 35 which projects through an opening 35- provided in the casting 1. Connected with the crosshead 35 is a crank 36; one end of which is connected with the crosshead by means of a bolt 37 the opposite end of which is connected with the disk 13 by means of a bolt 38. BelowI the casting` 1 and carried thereby is an electric motor 39 from which leads a `shaft 40 which connects with and drives a fan 41- also carried by the casting 1. The fan 41, is provided with a -conduit 41 which leads into an opening 41b provided in the. casting 1 and delivers into the outer casing 15. Non-rotatably secured on the shaft 40 is a pulley 42 which drives the pulley 8 through the medium of a belt 43. Rotatably` mounted in a lrecess provided in the rainV 28 is a roller 44 which i's held in place by a pin 45. Secured between the ribs 17 and 18- on the rearwardly extending portion 19 of the casting 16 is a block 46 which is held in place-by bolts 47 and 48. The block 46 is provided with spaced inclined or stepped portions 49 and 50.

Whenthe motor is operated the bar 32 will be reciprocated and the ram 28 will be moved outwardly, the roller 44 rolling down the inclined surface 49 and 50, thus moving the ram to the position shown in Fig. 7. The casting 1 is also provided with a downwardly extending boss or projection 23a which is disposed in the entranceto theconduit 22 and the bar 23 is provided with' an' upwardly extending boss or projection 23"- which cooperates with `the boss 23a to crush large particles of fuel as they enter the conduit. The outer end of the casting 16 is adapted to be positioned within an opening inthe firebox or furnaceysuch as the door. 'Ihe motor is connected in circuit with a thermostat arranged lwithin the building to be 'heated so that the circuit will be closed when the temperature falls below a predetermined point. This thermostat may be actuated by the temperature in the room to be heated or it may be a pressure actuated thermostat actuated by the pressure in the heat- -ing system of a steam or hot water system.

When the motor is started, the shaft 40 will be driven `which operates the fan. The pulley 8 will be driven from the shaft 40 through the medium of the pulley 42 and belt 43. The pulley 8 turns the shaft 6 on which is non-rotatably secured the worm 7 which meshes with and drives the,worm.wheel 10 and shaft 9 which carry the disks 12 and 13. When the disks 12 and 13 are "driven, the feeding bar 23 and rod 32 are reciprocated in opposite directions. The fuel Within the hopper 5 will be fed into the tube 22 and thence delivered (by the fuel feeding up and down the inclined portions 49 and 5()A to vary the path of movement of the ram. The fuel delivered in front of the ram will be distributed about lthe rebox by the ram. The fan 41 is also operated by the motor and delivers a blast of air through the conduit 41a into the casing 15. Due to the reciprocatory movement of the ram, the furnace will receive a pulsating draft, the air `passing through and about the ram to cool the same. The furnace will receive a normal draft of air through the conduit 15 and through the openings in the ram' when the motor isr not in operation. This pulsating draft of air delivered to the furnace causes the fine fuel to be burned in suspension ldeep or thick fuel bed is desirable. When a deepv fuel bed is desired, the block 46 is -removed. and replaced by block 46a which is shown in detail in Fig. 10 and which is of substantially the same. thickness throughout its length. With the block' 46 in place, the movement of the ram will be substantially horizontalas shown in Fig. 8. 'In' the spring or fallor in temperate climateswhere a thick or 'deep fuel bed is not desired, the block 46 will be used to vary the path of travel of the ram withinv the furnace and thus materially reducethe consumption of fuel.

It is also desirable that the ram be stopped only in its rearward position as shown in Fig. 1. In Fig.'13 there is disclosed somewhat vdia;- grammatically a circuit and mechanism for causing the ram to be moved to its rearward position regardless of when the room thermostat or temperature control is actuated. This mechanism consists of an insulating disk 52 AK'secured on the shaft so as to rotate therewith and having a metallic portion 53 having a gapI 54 therein. Disposed adjacent the disk 52 is a designates a switch which may be a thermostatic switch actuated by the temperature in the room to beheated or by the pressurein the heating system. When the swit'chf 57 is closed, current will be supplied to the motor from the-line through wire 58, motor 39, wires 59 and 60, terminal 61, switch 57, wire 62, wire 63 to the opposite side'of 'the line. Should the switch 57 be opened with the parts in the position shown in Fig. 13, current will flow'from one side-of the line vthrough the motor, wire 57 and thence through wire 64,' contact 65, arm 56, metallic Lacasse portion 53, arm 55, contact 66, wire 67, wire v63 to the opposite side of the line; and the-motor will continue in operation until the resilient arms and 56 are moved over the gap 54 whereupon the circuit to the motor will be broken until the switch 57 is again closed. The gap 54 is so disposed that the motor will/be stopped only when the grate occupies the position shown in Fig. 1. In this position, the furnace will receive normal draft through conduit 15. As the fuel feeding member and fuel spreading member move in opposite directions, it will also be seen that when the motor is tm'ned off, the limit switch will function to stop the parts in such position that the fuel feeder will be just at the beginning of its free stroke which permits the motor to gather momentum before the fuel feeder will reach a position where the fuel will be crushed thereby.

It will now be clear that I have provided a mechanical stoker which will accomplish the vobjects of the invention as hereinbefore stated.

Various changes may be made in the shape and size `of the parts as wellas in the manner of arranging and securing the various parts in place. It is therefore to be understood that the embodiment of the invention herein disclosed is merely illustrative and not to be considered in a limiting sense as the invention is limited only in accordance with the scope of the appended claims.

Having thus described my invention, what I claim is:

l. A mechanical stoker comprising a base member, a fuel delivery conduit leading from said base member and means for delivering fuel thereto, a reciprocatory fuel feeding mem- -motor for reciprocating said fuel feeding and spreading members, a fan operated by said motor and connected to deliver a draft of air through said second conduit and around said fuel spreading member, said fuel spreading member having a portion extending downwardly below the path of a major portion of the air passing through said second conduit and directing such air downwardly when in advanced position.

2. A mechanical stoker comprising a base member, a fuel delivery conduit leading from said base member and means for delivering fuel thereto, a reciprocatory fuel feeding and crushing member arranged within said conduit. a second conduit, a reciprocatory fuel spreading member arranged within and adapted to be projected beyond the delivery end thereof, an electric motor for reciprocating said fuel feeding and spreading members, a fan operated by said motor and connected to deliver a draft of air through said second conduit and around said position, and a limit switch for causing Asaid fuel feeding and crushing member to be stopped only in a fully retracted position.

FRANK V. MONKOSKY.

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