US1855339A

US1855339A - Liquid fuel burner

Info

Publication number: US1855339A
Application number: US270605A
Authority: US
Inventors: Frank H Cornelius
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-04-17
Filing date: 1928-04-17
Publication date: 1932-04-26
Anticipated expiration: 1949-04-26

Description

pril 26, 1932.

F. H. CORNELIUS LIQUID FUEL BURNER Filed April 17, 1928 4 Sheets-Sheet 1 INVENTOR Wan/f h. Cornelius BY i ATTQRN? 4 Shets-Sheet 2 Filed April 17, 1928 w RM. n w 4/ my Wm M A KY mm m PM 7 8 .N 4. QWMWN b? 3 m i Q Q? w m uh m 9v n N mm April 26, 1932- F. H. CORNELIUS 855,339

LIQUID FUEL BURNER Filed April 17, 1928 4 Sheets-Sheet 3 INVENTbR Haw/f )i Corfie/ius BY ATTORNEY April 26, 1932. F. H. CORNELIUS LIQUID FUEL BURNER Filed April 1'7, ,1928

4 Sheets-Sheet 4 2!: 4w I l i I, I 9 L I F}; {i v 102 -I It F16. 7

INVENTOR f'Kfl/YK -/i (OH/EH05.

"BYZ w g ATTORNEY Patented Apr. 26, 1932 r FRANK HQC ORNELIUS, OF SWISSV'ALE, PENNSYLVANIA.

. LIQUID FUEL BURNER Application filed April 17,

My invention relates to fuel burners and more'particularly to burners employing oil as a fuel.

One object of my invention is to provide aburner of the above described type that shall generate a current of air, both for procuring the propulsion of the atomized fuel andt e complete combustion thereof. Another object of my invention is to provide an oil burner that shall be sealed into the wall of a furnace so that substantially all of the air required for combustion will be su plied by the burner.

till another object of my invention is to provide a burner of the above described type that is sealed into the wall of the furnace that shall comprise a ventilatingmeans in the enclosed casing of the burner that is actuated to open position by the current of air gencrated within the burner.

A further object of my invention is to provide a sealed furnace with damper means in the flue and in the burner casing that shall automatically be closed or opened to corthereby prevent the fire box of the furnace from being cooled by a passage of air therethrough when the source of heat is cut-ofi'.

A still further object of my inventionis to provide an enclosed burner of the above described type having air compressing means that shall compress the air in different stags; the one stage supplying secondary ,air for combustion; the other stage of higher pressure being employed to propel the atomized fuel and to supply some of the air for combustion.

A still further object of my invention is to provide a burner, having different stages of compressed'air, with'damper means in the air passage thereof that shall provide regulation between the air supplies in order to assure complete combustion at all times.

A still further object of my invention is;

to provide an oil burner of the above described type that shall supply oil forcombustion, without passin the oil through a needle valve or other 0 structionable structure.

Still another object of my invention is to respond with the status of the burner to 1928. Serial No. 270,605.

provide a reservoir for a burner of-the above described type having an adjustable. oil leveling device that shall provide a predetermined height of oil therein from which a supply is provided to the atomizing cup.

A still further object of my invention is to provide a reservoir for oilassociated with a. burner of the above described type that shall be raised into supply position when the burner is in operation and shall be lowered to out of supply position when the burner is shut down.

Heretofore, oil burners employed in the art provided a current of air to atomize or spray the fuel into the combustion chamber. Openings were left about the burner in the entrance of the combustion chamber through which the -oxygen required for combustion was supposed to be automatically supplied. I have found by experiment, however, that the difficulty experienced in obtaining complete combustion in oil burners has been caused by the lack of oxygen required to obtain correct combustion. This failure of the air supply through the said opening from time to time was probably caused by a stoppage in the flue, humidity in the atmosphere,

7 the location and height of the chimney or of any one or a combination of the various causes of poor drafts.

In practising my invention I provide an oil burner in which the air for atomization is supplied in a manner somewhat similar to that found in the art, but is combined with the additional structure that supplies all of the air required for combustion. Regulating means is supplied for the air at several parts of the structure so that complete combustion is assured under all conditions. I am able to accomplish this result by completely enclosing the burner end of my structure within the combustion chamber which thereby receives air only through the source of supply within the burner, a sufficiency of which is always assured when the burner is in operation.

The above said construction provides further novelty to my invention as regulating 5 means may be supplied both on the burner and on the flue. so that the air is completely shut off from the heated combustion chamber 100 referring to the drawings in which: c

Figure l is a diagrammatical view of a comlete installation and of a burner embodyin my invention.

igures

2, 3 and 4 are views in elevation of in. articular form of my burner taken from its si e rear and front, respectively.

Figure 5 is a side view partlyinelevation and part1 in section of a particular form of a complete burner unit.

Figu taker along the line VI-VI of Figures 5' and.

Figure 7 is a sectional view taken along the line VII-VII of Figure 6.

Figure 8 is a sectional view of the particu' lar embodiment of my invention taken along the line VIII--VIII of Figures5 and 9.

Figure 9 is a sectional view of the structure taken along the line IX-IX of Figure 8.

Figure 10 is a view in elevation of my venting means showing a particular embodiment thereof.

Figure 11 is a sectional view taken along the line XI-'-XI'of Figure 10.

Figure 12 is a side view of my venting arrangement shown in Figure 10.

, My invention comprises in general a casing 1 that supports a stator 2 of an electric motor having a rotor 3, mounted on a shaft 4, that is supported on bearings 5 and 6 and is the means for operating the burner that will now be described in detail.

The casing 1 is provided with an extended portion 7 that forms the rear wall of a low compression chamber 10 that is formed by a cover portion 8.' The front surface of the cover portion 8 forms the rear wall of a second stage or high compression chamber 11 that is enclosed by a cover portion 12. The cover portion l2contains an extended por-. tion or air passage 13 that will be more fully described hereinafter.

'A rotating fan or blade member 14 is contained within the low stage compression chamber 10 and is mounted on the shaft 4 by means of a hub 16 that is secured thereto by set screws 17. The high stage compression chamber 11 encloses a fan or blade member 18 that is supported on the shaft 4 by means of a hub 19 and set screw 21.

Referring to Figure 8, the cover portion 8 is shown in section disclosing air-directing vanes 22 that direct the air supplied by the blades 14. into the provided passages.

The air supplied from the exterior of casing 1 passes around and cools the motor as re 6 is a sectional view of the burner- .lation similar tothat disclosed in Fi blades 14 through a central annular opening 23 into the chamber 11 or into openings 24 for a purpose that will be hereinafter related.

The air passing through the orifice 23 is further compressed by the rotating fan 18 and is directed by the vanes 22, contained within the face of the cover 12, into the air conduit 13 at a high velocity, the purpose of which will be described hereinafter.

Figures 5 to 9 clearly disclose the different types of blades or rotating fans that are reuired to produce the volume or pressure in t e' different air supplies. The short, broad blades 14 are employed to move a large body of air and to compress it only a minimum amount. The blades 18 are narrow but long and operate on that part of the air supplied by the blades 14 through the opening 23, to produce a much greater degree of com ression. From many experiments thatl ave made I have found that blades bearing a reures 5; to 9 are the most economical in suppiying air for both atomization and combustion. 1' single fan member might be employed to comress the air to the maximum degree required orfuel' propulsion allowing an amountto expand to be employed in a manner similar to my above described secondary air but tests have proven that this method is not as economical as that produced by my preferred structure.

The front end of the shaft 4 contains a threaded portion 25 to which an atomizing cup 26 is attached and which is substantially similar to atomizin cups that have heretofore been supplied in the art. The sides of the cup 26 slope outwardly toward the front and terminate at the rear or su port end in a projection or flange portion 2r that is employed to prevent the oil from flowing over this end and thereby forces the oil to pass along the S10 ing sides towards the front end of the cup. oles 28 are provided in mounting hub 29 of the cup 26 to permit a constant flow of oil into the front end of the cup.

The front end of the cup 26 terminates in a sloping portion 31 that forms a knife edge 32 around the rim of the cup 26. The object of this sharp edge 32 is to permit the oil to leave the rim of the cup in a spray rather than permit it to collect thereon in drops and to be thrown therefrom in sludges rather than in a complete atomized state that is required to produce good combustion.

The air passage or conduit 13 projects substantially to the end of the cup 26 and contains a rib portion 33 that supports the bearings 6 and the shaft 4 that is aligned substantially centrally thereto. The end of the outer surface of this passage 13 contains a threaded portion 30 on which an annular slopthrown centri distance at which the air compression chamber is before strikin provided to adapt my burnerso that it may employ different grades of oil as a fuel and also to divergethe flame to adapt it to various shaped combustion chambers within which it may be employed.

Completely enclosing the air conduit 13 secondary air conduit 35 that supplies the addltlonal air for the complete combustion of the atomized fuel and which is directed into the-furnace substantially concentric to theair conduit 13. This air supply passes from the low compressionchamber 10 through the orifices 24 heretofore mentioned and passes through a similar orifice 36 in the walls of the high compression chamber 11, although not being in direct communication therewith, and passes into the secondary air conduit 35. The passages 24 contain a damper 40 that is operated by the rods 37 to regulate the amount of secondary air supplied to the conduit 35. By this means the exact amount of secondary .air to produce complete combustion is obtained.

I will now describe my novel method of supplying the fuel to the'atomizing cup in which needle valves and other means of possible obstruction are eliminated from the supply line. The rear or opposite end of the said shaft 4 is provided with a hub member 41 that conta ns an enlarged portion on its outer end that is circular in shape and comprises; sides'42 beveled toward its outer circumference.' A flexible connection 43 is attached to the hub 41 forming a flexible connection with a hub 44.

Thehub 41 revolves within a chamber 46 that forms the closure member for the rear end of easing 1. The lower portion of the chamber 46 comprises a well 54 for the oil,

the height of which is regulated by a lGVGllllg device 48 that will be described hereinafter. The. upper portion of the chamber 46 comprises a slot portion 51 aligned with the beveled edge 42 of the hub 41 and is connected to an 011 conducting conduit The level of the oil in the well is regulated to have the said beveled edge 42 revolve therein and to throw the oil ceutrifugally into the slot 51, thereby passing it by means of the conduit 52 and a conduit line 53, through which it is carried by gravity, into an annular orifice 55, from which it will readily flow ,into the atomizing cup 26.

An aperture 50 maybe provided in the wall of the chamber 46 through which air burner is in operaof reduced pressure the housing 46. I in apprcciablerand substantially con;-

tion, producing an area above the well 54 within have found this reduction as the motor operates at stant sipeed the reduced pressure raises the level 0 oil in the well 54 until it engages the beveled sides of the hub 42. I employ this means ofdisconnecting the oil suppl as a safety device to prevent a supply of oi from flowing into the atomizing cup and the air passages after the burner is shut down.

When the aperture 50 is employed the oil level in the well is below the beveled side 42 and is distant therefrom such an amount that the rise of the level when the burner is in operation will be in proportion to the air supply which will vary with the speed of operation of the motor. Thus, when the motor is building up speed or is slowing down, the oil supply will be increased or diminished in an exact predetermined manner proportionate to the amount of air flowing. That is to say, when the motor is slowing down the pressure within the chamber 46 is immediately increased with a corresponding lowering of the level-of the oil in the well 54, and the supply to the atomizing cup is diminished.

In this manner, the flame of the burner is a put out because of the shutting ofli of the Oil supply and not because of the lack of atomizing air that heretofore caused oil to be fed to the combustion chamber after the flame of the burner was extinguished.

To provide a means of supply for the well 54 a fuel reservoir 48 is provided containing regulating means for varying the levels of the oil in the well 54. Oil is supplied to the res ervoir 48 by one side of a twirl pump 45 that is connected and operated by the hub 44 of the aforesaid universal joint on the rear end of the shaft 4. The supply side of the pump 45 provides an excess amount of oil to the reservoir 48 so that a suflicient supply will be on hand at all times.

A pipe 47 connects the bottom of the reservoir 48 to the lower extremity of the chamber 46. An overflow connection is located at the bottom of the reservoir 48 and is connected to the return side of the pump 45. An extension 49 is so associated'wit-h the connection (30 that it may be raised or lowered through the greater part of its length. By this means, the height of the oil in the reservoir 48 will be that of the overflow or height of the extension 49. As the reservoir 48 is in communication with the chamber 54 the height of the oil in the chamber 54 will be the same as that of the reservoir 48. Thus of greater or less-viscosity is employed. than that for which the oil level was originally provided.

The high compression air passage 13 has on its upper wall the arcing terminal lugs 58 I provided and 59 that support the arcing terminals 61 and 62, respectively. The lug 59 is directly connected to the metal of the passage 13,

while the lug 58 is supported on the insulating member 63 to insulate the terminal 61 therefrom. i

A high voltage transformer 64 is provided on the rear of the burner and is grounded to the casing 1, the other terminal of which is connected to the terminal 61 by a high voltage lead 60. By this means a spark may be at the tips 65 of the arcing terminals 61 and 62 that may be em loyed to ignite the atomized fuel at the iieginnin of each operation of the burner. Hereto ore, it has been impossible in the art to provide a direct means of igniting the fuel oilsupply from an oil burner of the atomizing type. The intensity of the heat so )rovided would destroy the arcing contacts t lat must necessarily be in the vicinity of the atomizing cup in order to. ignite the rapidly moving fuel. By placing my arcing contacts 61 and 62 within the secondary air passage 35 above described, I am able to sufiiciently cool them and at the same time position them adjacent to the atomizing cup 26 without having them destroyed by the ensuing flame.

A cover 66 that may be of cast metal or of sheet iron construction is provided, entirely enclosing the rear portion of the casing 1, the high voltage transformer 64, the reservoir 48 and the pump 45. A plurality of bolts 38 are employed to unite the

covers

8 and 12 of the

compression chambers

10 and 11 and a similar group of bolts 39 are employed in the expanded portion of the secondary air conduit 35 to make a complete unitary structure of the air conduits 13 and 35, the

compression chambers

10 and 12, the casing 1 and the cover 66.

The cover 66 is provided with an automatic damper 67 shown in Figure 1 that may be of any design that will be automatically operated by an inflow of air produced by the operation of the

fans

14 and 18. The form preferred is shown in Figures 10, 11 and 12 in which a frame 68 is the means for supporting the housing or rectangular shaped frame 69,, in which the louvres 71 are pivotally supported they freely swing. the burner is not operating the louvres 71 are not attracted to their open position, as shown in Figure 12, but are in a lower or closed position, as shown in Figure 11. The louvres 71 are provided with a fibre or felt strip 72 on its lower most. end that abuts against the longitudinally disposed rods 73 to form a tight seal therewith.

The outer portion of the frame 68 is pro vided with a screen covering 7 4 to protect the louvres 71 from being distorted by any substance that might be inadvertently thrown thereagainst and to prevent the air on rods 73 and upon which In normal position when currents passing therethrough from carrying paper or any other like material to with within the above described compression 'sys' tem', a damper 7 5 is provided in the lower portion of the housing at the mouth of an" i opening 76 by which means the air drawn" through the frame 68 in the casing 66 may be regulated to vary the amount of supply furnished to the burner.

A frame 77, similar to that of the above described frame 68, with the exception that the louvres 71 thereof are arranged to operate with a less ressure than required to operate the louvres 1 of the frame 68, is provided in the flue of the furnace as shown in Figure 1. This difference of operation may be accomplished by enlarging the area of the louvres 71 of the damper 77, or by any other means well known in the art. tion, the damper 77 will be moved to its open positionwhen the burner is inoperative by the draft in, the'fiue and which will be closed thereafter by the forced draft supplied by the burner when in operation. The louvres 71 of the frame 77 may also-be operated to open or partly open position when the burner is in operation if the force of the draft in the flueexceeds the air supply of the burner..

As above described, the burner is completely sealed within the fire box "of the furnace and the air supplied thereto'must necessarily pass through the damper 67 to supply the air, both for atomization and combustion. It will thus be seen that when the burner is not operating, the louvres 71 of the damper 67 will be in their closed position and the louvres 71 in the damper 77 will be operated by the natural draft of the flue, by which means the said natural draft will be completely cut off from the furnace and the heat stored therein will not be lost or dissipated b the natural draft that is usually present in burners heretofore employed in the art and which passes directly through the fire box containing the stored heat. 'By this arrangement my damper system will prevent the excessive draft, that will be present in extra high or large fiues, from cooling the combustion chamber while the burner is in operation. By such an arrangement of my dampers I procure a great saving in the amount of the fuel also connected to the wall of the tank 78 to i With this construe provide an outlet for the air, or inlet'thereto, as the case may be as the oil is supplied to or removed from the tank 78. A supply line 85 is rovided from the bottom of the tank 78 at 86 and is connected to an anti-siphon device 87, from which it passes through the line 88 located within the cellar 89, to the twin oil pump 45. The preferred form of anti-siphon device is that in which no valve iseinployed' and which automatically 0pcrates to cut off the oil supply when the system is siphoning. Such valves are well known in the art and as the structure thereof forms no part of the present invention, it will not be described.

An oil line 92 is provided connected to the return side of the twin pump 45 and extends to the top of thetank 78, as at 93. The object of the return line 92 is to providea passage for the excess oil that is being supplied by the twin pump 45 and which overflows into the extension 49 and the connection 60 and is returned to. the tank by the return side of the pump 45 and the line 92. This return of 15 the oil keeps the supply within the tank 45 as aforesaid is of greater capacity than would ordinarily be required, so that the oil at all times is being passed to and from the tank 7 8. Thus, a supply of uniform viscosity will be had at all times for the burner, so

that'the' regulation thereof will remain uniform throughout the entire use of one complete tank of oil. 7

Any methods of electrical control may be provided for protection and for regulating the heat of the furnace. The system herein shown is a preferred arrangement in which a motor operated switch 94 is actuated to on or off position by the contact in the thermostat 95. The thermostat 95 may be of any desired type well known in the art and is located in a position within the house wherein uniform temperature is desired. Thls arrangement causes the furnace to be operated intermittently to keep the space to be heated within certain predetermineddegrees of temperature. The temperature desired is set on the thermostat 95 and may be changed from time to time to correspond with the various changes in temperature throughout the year.

A thermostat control 96 is provided within the furnace walls as a safety device to cut off the burner when the temperature of the walls have passed an allowable rise in temperature. For the same purpose, a thermostat-control or cut-off 97 is provided in fine 98 which also operates tci cut off the burner when the temperature of the flue has passed a similar safe range.

Switch box 100 is provided as a means of control for the system. Herein the main switch is located as well as the fuses and other safety devices that may be emplo ed for the protection of the system. Cond uit 101 is employed to connect the box to the switch and to the burner and to protect the wires carried therewithin.

The n1otr.)r-opera.-ted switch 94 is first actuated by the contacts of the thermostat 95 which actuation revolves the switch 180 degrees making contact with the burner motor and with the transformer 64. After about 90 seconds the transformer is disconnected; and if the burner has failed to ignite the switch motor operates to cut off the burner motor from the circuit and the burner is again in a completely inoperative position.

However, if the fuel of the burner is ignited before the 90 seconds, after which the transformer is cut off, the burner will continue to be operated until the temperature of the room containing the thermostat 95 again causes the circuit to be broken or which is caused to be broken by the operation of the other thermostats, above mentioned, to shut down the burner.

When the circuit-is completed to the burner motor comprising the stator 2 and rotor 3, its operation revolves the shaft 4 that actuates the twin pump 45, the fans or

blade members

14 and 18 and the atomizing cup 26. -As the air is drawn through the rear of the casing 1 by the aforesaid blade members, a reduced pressure area is formed in the upper area portion of this casing that operates through the aperture 50 to rarify the area of the chamber 46. The inrush of passes about the rotor and stator of the said motor into the

compression chambers

10 and 11 through which it passes in different stages of compression through the air supply passages 13 and 35, respectively. The rarified area in the chamber 46 located above the level of the oil contained in the well 54 thereof causes the level of the oil to be raised due to the greater pressure on the surface of the oil 'in the leveling chamber 48. The level of the'oil thus obtained in the chamber 46 is raised to engage the beveled side 42 of the hub 41, which throws the oil due to centrifugal force into the slotted section 51 from which it flows by gravity through the conducting

oil passage

52 and 53 into the annular orifice 55 from which it flows'along the side of the atomizing cup 26 and is thrown centrifugally therefrom into the air supplied from the passage 13. The electrodes 61 and 62 are located directly in the path of the atomized fuel, thus. obtains, and readily pr'ocures, its ignition. The air supply in the passage 13 isemployed both for atomizing and for combustion but to insure a sufficient amount of oxygen for complete combustion under all conditions, additional air is supplied throughthe secondary air passage 35,

'air past the damper 75 in the passage 76 which passage contains damper means 40 so, that the supply required to be added to the airof the passage 13 may be regulated to fit all conditions that are encountered in different installations of my burner.

One may observe thatmy burner has been invented with the object of reducing the servicing thereof to the minimum. It, will be noted the motor is kept cool to-prevent it being burnt out from continued operation, that the supply line contains no valves or other means that may cause a stoppage therein and that the electrodes are placed in an air stream so that they will not be destroyed due to their closeproXimity to the flame. In order that the wearing parts, that is the bearings 5 and 6, may have an equally long life requiring no attention, I have

providedoil reservoirs

56 and 57 to supply oil thereto. These reservoirs are of the wick type and are connected by an oil supply line 102 to a reservoir 103 located adjacent to the burner. The reservoir 103 is fill-ed with a lubricating oil when the burner is first put in service and should contain suflicient lubrieating oil to lubricate the bearings 5 and 6 for an exceedingly long period of time.

It will thus be seen that I have constructed an oil burner that should run for an exceedingly long period without requiring any attention whatsoever in order to have it operate correctly at all times. I have accomplished this longevity by supplying the oil to the atomizing cup without having it pass through a single annular orifice or obstruction that would in time clog the line and reduce the oil supply to the combustion chamber. I have accomplished this by my novel leveling device that requires no valve "and also by my novel means of supplying oil to the atomizing cup and completely disconnecting the supply therefrom without employing a single obstruction in the supply line.

a My invention is further novel in supplying air for combustion in two stages of comression, the higher stage being employed or propelling the atomized fuel and to supply some of the air for combustion; the lower stage containing the regulating means for supplying the remainder of the air that may be required. By this method of so having the burner supply all of the air required for fuel propulsion and for combustion, I am able to-completely seal my burner in the walls of the combustion chamber which is thereby completely out off from the outside atmosphere and which will receive no air except that which is supplied through my novel burner.

By so installing my burner in the firebox of a furnace, I am able to operate it at a great saving by utilizing all of the heat produced by my burner by shutting it off from all drafts or passages of air when the burner is inoperative. I accomplish this by enclos- 1,au,sse

ing the burner in a casing in which an auto.-

matic damper is arranged that will be open when the burner is in operation and closed when the burner is shutoff. A similar damp- I er is arranged in the flue connected to the combustion chamber and is actuated to open position by the draft in the flue when the damper in the casing of the burner iscl osed.

tained therein as stored heat to later give up to retain the temperature of the its energy; spaces to be heated. The natural draft in the chimney instead of causing air to pass from the heated surface of thecombustion is means, the heat stored up'in the comchamber, opens the damper in the flue and passes air therethrough from a source exterior of the combustion chamber.

My burner is further novel in employing the cool air in the secondary or low compression air passage to cool the electrodes that I employ to ignite the fuel of my burner.

I do not wish to be restricted'to the par ticular structure herein shown as many changes, additions, subtractions, substitutions and arrangements may be made as would be apparent to anyone skilled in the art. I therefore wish my invention to be limited only by the scope of the appended claims and the prior art.

I claim as my invention:

1. The combination with a liquid fuel burner having a motor, .a mechanical fuel atomizer driven thereby and an air compressor driven thereby for supply'in air for sustaining combustion of the fuel, 0 a gravity means for supplying fuel to the said atomizer, a means constantly driven by the motor for delivering fuel to the gravity means and means for varying the degree of effectiveness of'the fuel delivering means.

2. Aliquid fuel burner having a motor, an atomizer and an oil-throwing member driven thereby, a container for a body of oil surrounding said member and having an outlet for catching oil thrown by the rotating member after dipping, in said body of oil, and means for conducting oil from said outlet to said atomizer.

A liquid fuel burner having a motor, an atomizer and a disk driven thereby, a container for a body of oil partly immersing said disk and having an outlet for receiving oil thrown ofi said disk by centrifugal force, and gravitymeans for conducting oil .from said outlet to said atomizer.

4. A liquid fuel burner having a motor, an atomizer, a fan and an oil-throwing mem- 'ber driven thereby, a container for a body of oil surrounding said member and having an outlet for catching oil tli rown thereby, means to permit air to be withdrawn from said casing by said fan, therebyto permit the level of said body of oil to raise to contact said member when said motor operating, and

means for conducting oil from the first-named outlet to said atomizerv 5. A liquid fuel burner having a motor, an atomizer, a fan and a driven thereby, a container for a body of oil enclosing said disk and having an outlet for receiving oil thrown ofi said disk by centrifugal force, means for permitting a flow of oil into and out of said casing, said casing having a second outlet to permit air to be Withdrawn there from by the action of said fan, thereby to permit the level of said body of oil to raise to contact said member when said motor is operating, and gravity means for conducting oil from the first-named outlet to said atomizer to permit a stream of air from said fan to act thereupon.

In testimony whereof, I have hereunto subscribed my name this 27th day of March,

FRANK CORNELIUS.