US1147884A - Fuel-feeding device for limekilns. - Google Patents

Description

J. W. ORMSBY.

FUEL FEEDING DEVICE FOR LIMEKILNS.

APPLICATION FILED APR. 28, I913.

Patented July 27, 1915.

4r SHEETS-SHEET 1.

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COLUMBIA PLANOGRAPH CD-.WASHINGTON, n. c.

I. W. ORMSBY.

FIJEL FEEDING DEVICE FOR LIMEKILNS.

APPLICATION FILED APR. 25% 19I3.

Patented July 27, 1915.

4 SHEETS-SHEET 2.

Sum,

COLUMBIA PLANOGRAPH .11., WASHINGTON, D. c.

I. W. ORMSBY.

FUEL FEEDING DEVICE FOR LIMEKILNS.

APPLICATION FILED APILZB, I913- 1,147,884. Patented July 27, 1915.

4 SHEETSSHEET 3.

i i/Manama COLUMBIA PLANOURAPH 60.. WASHINGTON. D. c.

J. W. ORMSBY.

FUEL FEEDING DEVICE FOR LIMEKILNS.

APPLlCAIlON FILED APR-28,1913.

Patented July 27, 1915.

4 SHEETS-SHEET 4- um/whom %M l/v viweooao aia cf V flbtomua g COLUMBIA PLANOGRAPH cm, WASHINGTON, D. C.

JOHN W. ORMSBY, 01E IVIILWAUKEE, WISCONSIN.

FUEL-FEEDING DEVICE FOR LIMEKILNS.

airesa.

Specification of Letters Patent.

Patented July 27, 1915.

Application filed April 28, 1913. Serial No. 764,281.

To all whom it may concern:

Be it known that I,Jo1-IN W. ORMSBY, a citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in F uel F ceding Devices for Limekilns, of which the following is a speciiication. V,

1 My invention relates to improvements in devices for feeding fuel to the furnaces of limekilns', steam generators or the like.

It is a well known fact that when the door leading to a furnace is opened for the purpose of replenishing the same with fuel, a current of cold air'is caused by the combustion of the-fuel withinthe furnace, to rush into the same, whereby the furnace is cooled and the work to be performed is retarded.

The object of my present invention is more especially, among other things,to provide a device for discharging a body of fuel into the combustion chamber as quickly as possible after the door is opened and also to provide means for excluding air while the fuel is being discharged into the combustion chamber and for closing thefurnace door as soon as the fuel has been discharged whereby a minimum volume of air only is permitted to enter the combustion chamber above the'grate.

My invention is further explained by reference to the accompanying drawings, in which- Figure 1 represents a front view of a lime kiln provided with my device for discharging fuel into the combustion chamber of the furnace, showing the fuel elevating receptacle lowered preparatory to filling the same with fuel. Fig. are also a front view of the furnace similar to that shown in Fig. 1, showing the fuel receptacle in its raised position preparatory to discharging its contents into the furnace. Fig. 3 is a side View showing the fuel duct in position for dis charging fuel into the furnace; and Fig. 1 is a similar view to that shown in Fig. 3, showing the fuel duct inclined in the opposite direction to that shown in such figure, or away from the furnace.

Like parts are identified by the same ref erence numerals throughout the several views.

While my device is adapted, as stated,'to be used forsupplyingother furnaces with fuel, the same is shown and described as connected with the furnace of a lime kiln.

obvious that as 1 represents a lime struction.

2 is the door leading to the furnace of the kiln through which fuel is discharged into the furnace. The fuel duct 3 extends upwardly preferably at a slight angle to the vertical from the door way 2, whereby as the fuel is discharged into its upper end, it is given the" required momentum to cause it to be thrown to or near the center of the fuel grate 5 within the combustion chamber 6. The lower end of the fuel duct 3 is provided with an upward curve or bend 7, whereby as the fuel drops from the upper to the lower end of said duct and is brought into contact withthe lower side 8 of said bend, it is directed upwardly and forwardly in its course, as indicated by the arrows, to near the center of the fuel supporting grate.

Heretofore it has been common where wood is used, to insert a single stick at a time. By my improvement, however, when wood is used,the same is preferably cut and split into alarge number of small blocks 9, as indicated in Fig. 3, whereby quite a large number of blocks may be simultaneously discharged through said duct. It will of course be understood that when coal or other fuel is used, the same may be elevated and discharged through the duct 8, the same as the blocks of wood. The receptacle is suspended from one or more pulleys 11 by the cable 12, which cable is preferably connected with said receptacle through a plurality of branch cables 13, 13, whereby said receptacle is normally retained in a horizontal position while elevating the fuel. The pulleys 11 are connected with a supporting beam 14; by the brackets 15 in the ordinary manner. a

The upper end of the fuel kiln of ordinary conduct 3 is pro yided with a hood 16 for excluding the air therefrom, and the hood 16 is pivotally supported from the side of the duct by the pivotal bolt 17. The respective sides of the hood 16 are provided with projecting lugs 18, which are adapted to be engaged by the respective arms 19 of the fuel receptacle as the latter is being raised. Thus it will be the receptacle 10 is being raised, the arms 19 are brought into co1'1 tact with the lower sides of the projecting lugs 18, whereby the hood 16 is thrown back on the pivot 17, preparatory to dischargin the blocks of wood or other fuel into the duct. When, however, the contents of the receptacle 10 have been discharged, the same is lowered, when the hood 16 drops back over the upper end of the duct 3 to its normal position, thereby excluding the admission of air to said duct and furnace. The lower end of the cable 12 is connected with a winding shaft 20,'near the base of the furnace, and said winding shaft is provided with a crank 21 by which it is revolved. Thus it is obvious that when the receptacle has been filled with fuel, it is raised from the position shown in Fig. 1 to that shown in Fig. 2 by revolving the crank 21. As the crank 21 is revolved, the cable 12 is wound upon the shaft 20 until the contents of the receptacle have been raised and discharged into said duct 3. It will of course be understood that by a reverse movement of the crank 21, the cable 21 will be unwound from said shaft, when said receptacle 10 will be permitted to descend by gravity from the position shown in Fig. 2'to that shown in Fig. 1, preparatory to being refilled with fuel.

The door way 2 is provided with a vertically movable door 22, which of course is necessarily opened, preparatory to discharging the contents of the receptacle 10 into the furnace and for convenience in opening and closing said door 22, I have counterbalanced the same with a weight 23, which weight is connected with said door by a cable 24, operating over pulleys 25. The pulleys 25 are revolubly supported from the beam 26 or in any other convenient manner upon the pins 27. As a convenient means for thus opening and closing the door 22, I have provided an operating lever 28, which is pivotally supported from the side of the furnace or kiln on the pivotal bolt 29, while its upper end is connected with the cable 24 by the member 30. Thus it is obvious that by moving the lower end of the lever 28 toward the left, reference being had to Figs. 1 and 2, said door 22 will be raised while by moving such lever in the opposite direction, said door will be lowered. The weight 23 is preferably of such dimensions as to practically counterbalance the weight of the door 22, whereby the door will remain in either its raised or lowered position. As a means of automatically opening and closing said door 22, I haveprovided the cable 12 with a bifurcated arm 31, the respective ends 32 of which are adapted, as the cable 12 is lowered, to move along on the respective sides of the cable 12 until said arms are weight 23, when by the further downward movement of said cable 12, as the latter is being wound upon the winding shaft 20, said weight 23 is drawn downwardly, whereby the door 22 will be automatically raised by the turning of said shaft 20, while by a reverse movement of said shaft, the bifurbrought in contact with the cated ends of said arm 31 will move up-' wardly away from said weight, whereby the door 22 is free to descend of its own gravity, thereby closing the passage through the door way 3. It will of course be understood that where the door 22 is automatically operated, it is necessary that the weight of the door be slightly in excess of the weight 23, whereby as soon as said weight 23 is released from the action of the bifurcated arm 31, said door 22 will descend of its own gravity, and when thus automatically operated, it becomes unnecessary to use the lever 28.

In view of the fact that it sometimes becomes necessary to reach the interior of the furnace for cleaning the grate and other purposes, the fuel duct 3 is pivotally supported at its upper end in such a manner that its lower end may be swung back away from the furnace from the position shown in Fig. 3 to that shown in Fig. 4. The duct 3 is suspended from a supporting beam or other member by hangers 35, brace rods 36, trunnion 37 and trunnion supporting plate 38. The plate 38 is secured to the-side of the duct 3 by a plurality of boltsor rivets-39, whereby it is obvious that when the duct 3 is thrown back, as shown in Fig. 4, a person is free to pass between it and the furnace as may be found desirable for the purpose of cleaning the grate or other purposes.

40 is a flexible member, one end of which may be connected with a fixed wall at a distance in any convenient manner, while the opposite end is provided with a hook 41, which is adapted to engage the loop 42 formed in connection with the duct 3, whereby said duct 3 may be supported out of contact with the furnace when not in use, as

The respective ends 45 and 46 of the receptaclelO are preferably formed at a slight angle to each other, whereby the contents at the front end 45 of the receptacle will be discharged slightly in advance of the contents in the opposite end 46. As a means of guiding the receptacle 10 as it is being raised and lowered, I have provided one or more guide rods 47, and'said receptacle is connected with said guide rods by the loop 48, the lower end of said guide rod being connected with the lower end of said receptacle by the retaining member 49, while the upper end of said guide rodis supported by the angular member 50 in any convenient manner.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isv In a device of the described class, the combination with a furnace, of a fuel duct terminating with an upward bend at the I said duct, said hood being adapted to normally close the inlet end of said duct, a fuel receptacle, means connected with said receptacle adapted to engage said hood as the former is raised, whereby said hood is thrown back and the contents of said recep- 10 tacle are discharged in to said combustion chamber.

In testimony whereof I aflix my signature in the presence of two witnesses.

JOHN W. ORMSBY. Witnesses:

JAS. B. ERWIN, C. L. ERWIN.

Gopies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. C.

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