US2022024A - Burner - Google Patents

Description

G. BLUEMEL Nov. 26, 193.5.

BURNER Filed Feb. 12, 1934 j /vgn'omaf' Patented Nov. 26, l 1935 UNITED STATES PATENT OFFICE BURNER Gustave Bluemel, Chicago, Ill.

Application February 12, 1934, Serial No. 710,776

' V19 Claims. (Cl. 158-53) This invention relates to burners of the kind particularly adapted for the combustion of liquid petroleum products and such as are commonly referred to as oil burners and where the term oil is used herein it is intended to include combustible products from whatever source they may originate whether natural or artificial insofar as they are eifectivey in producing the results herein set forth.

The primary object of my invention is to eflO fect efcient combustion of oil by converting it into a vapor and consequently mixing the vapor with air and igniting the mixture.

Another object is to effect vaporization of the oil by heat and to carry out this vaporization in l5 the operation of the burner by utilizing heat resulting from the combustion of previously Vaporized oil.

Further objects of the invention are to divert a part of the burner flame to effect vaporization;

to raiseY the temperature of vaporized oil prior to its mixture with air to effect more efficient combustion; to create a diiierence in pressure between communicating passages in the burner to effect circulation therein; to utilize the air supply to draw vaporized oil to the point of combustion for admixture withythe air; to control the amount of air flowing to the burner; to automatically maintain a constant level of oil in the burner at the place of vaporization; and to provide a novel burner of simple and economical construction and eiicient and positive operation.

A selected embodiment of my invention is illustrated in the accompanying drawing wherein Fig. 1 is an elevational view illustrating a typical installation for my novel burner;

Fig. 2 is a vertical longitudinal sectional View of my burner;

Fig. 2c, is a vertical sectional view of an overflow device used with the btu-ner and showing the device inoperative relation to the burner as illustrated in Fig. 2;

Fig. 3 is a transversesectional view taken substantially on the line 3-3 of Fig. 2; and

Fig, 4 is a transverse sectional detail view taken substantially on the line 4-4 on Fig. 2.

In the accompanying drawing the main housing of my novel burner is generally indicated by 5 and inclu-des an oil sump 6 to be described in detail hereinafter and in which a constant level of oil is adapted to be maintained. A pipe 1 leads Vto this oil sump fromy an overflow device generally indicated by 8 and which includes a cup 9 closed at its upper end by a removable plate -Iil and which has a passage il at the lower end k5,5 thereof with which the pipe 'I communicates. A

. the pipe 20 back to the supply tank i6.

removable plug I0 is provided in the plate I0. An overflow pipe I2 is provided in the cup 9 and the overflow device 8 is mounted in juxtaposition to the-burner housing 5 with the upper end of the overiow pipe I2 in the plane of the oil level de- 5 sired to be maintained in the sump 6. A return pipe I3 leads from the overflow pipe I2 to the supply tank I6 mounted at the lower level then to the overflow device 8. The supply pipe Ifi leads from the supply tank to the inlet of the 10 pump i5. An outlet pipe I8 leads from the pump to a gravity tank Is mounted at a higher level than the pump I5. An overflow pipe 2i? is connected to the tank I9 near the top thereof so that when more than a predetermined quantity of oil is 15 forcedk into the tank I9 the oil may flow through The tank I9 is provided with a breather pipe 2I to prevent the entrapment of air therein. A pipe 22 leads from the tank I9 to an oil lter 23 mounted at 20 a lower level than the tank i9. A pipe 24 leads from the oil filter 23 to the passage I i. By reason of the head of oil maintained in the tank I9 oil may flow from the tank through the pipe 22, lter 23 and pipe 24 into the cup 9 and a valve 25 is 25 provided in the pipe 2li to control this oil flow.

A pipe 26 having a valve 2l therein leads from a suitable source of air under pressure to an automatic electrically operated regulating valve 28 'equipped with a by-pass, and this valve serves to 30 regulate air flow through the pipe 29 to the tting 30 to which a pipe 3| is connected and which is also connected to the burner housing 5 as will be explained more fully hereinafter. A pressure gauge 32 may be connected to the fitting 30 to 35 indicate the air pressure in the pipe 3 l. The valve 28 may be regulated by suitable means such as an indicating potentiometer 33 which is in turn regulated by a temperature responsive means 34 such as a thermocouple arranged within the area 40 to be heated by the burner. These devices function to regulate the operation of the burner as will be explained more fully hereinafter but the particular construction and specific operation thereof are no part of my invention.

The burner housing 5 includes a body 35 having a circular pocket 36 at the lower end thereof into which a sleeve 3l is adapted to be iitted. The sleeve includes a flange 38 which rests againstv one end of the body 35 and machine screws 39 or the 50 like are passed through this flange and joined in the body to secure the sleeve 3l therein. I The interior of the sleeve 3l provides the sump 6 and the pipe 'I communicates with the interior of said sleeve. A drain cock 4I] is provided at the lower .55

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end of the body 35 and an opening 4l in the bottom of the sleeve 51 communicates with this drain cock to permit drainage of the sump 6. An axially extending tapered rib 42 projects diametrically across the sleeve 31 and terminates in spaced relation with that part of the sleeve 31 in which the opening 4i is provided, and this rib is adapted to extend below the liquid level to be maintained in the sump 5. Slots 43 and 44 are provided in the sleeve on each side of the rib 42 and respectively communicate with ver-tically extending passages 45 and 46 in the body 55.

The body 41 of the burner housing 5 includes a flange 4S which is screw-threaded or otherwise joined to the top of the body 35 and in the body 4l is a passage 49 which communicates with the passage 45. An opening extends transversely through the body 41 and the burner nozzle 5I is adapted to be mounted therein.' The burner nozzle 5i includes a flange 52 and a gasket 53 is interposed between this fiange and the adjacent part of the body 41 and bolts 54 are provided for tightly clamping the flange 52 against the gasket 53 to thereby tightly connect the nozzle 5i to the body 41. This construction permits the nozzle to be removed and another substituted therefor for different shapes of nozzles will be provided for different usages to which my burner may be put. The nozzle 5l extends across the passage 45 and likewise extends across a chamber 55 provided in the body 41 and the lower part of the chamber 55 communicates with the passage i5 and the upper end of this chamber opens into a passage 55 which extends through the body 41 in alignment with the nozzle 5I.

The nozzle 5| includes a tapered passage 51 through which the fiame resulting from the combustion in the burner passes. At the inner or restricted end of this passage there is a pocket 58 which is tapered in a direction opposite tothe taper of the passage 51 and which opens through the rear wall of the body 41. The inner end of the pocket 5S is larger than the inner end of the passage 51 whereby a shoulder 59 is defined. The lower part of the passage 51 at the pocket 5B and aligned with the passage 49 is cut away as indicated at 59 for a purpose to be made apparent presently. The combustion occurs initially in this pocket 53 and a pressure is built up in this pocket as a result of such combustion.

My novel burner includes a mixing nozzle 6l which opens into the pocket 58 and which has a bore 52 therein aligned with the tapered passage 51. The forward end of the nozzle 5l is slightly spaced from the outer end of the pocket 58. At the rear end of the bore 52 is an outwardly tapered pocket 63 and a tapered air nozzle B4 on the body 55 projects into this tapered pocket and is spaced from the wall thereof. The nozzle 6i is screwed into a threaded opening in a coupling S55 and the body B5 includes a threaded portion 51 which is also fitted in a screwthreaded opening in the coupling 65, there being a chamber 69 in the coupling 55 intermediate the parts of the coupling in which the nozzle 5l and the body S5 are secured. A passage 69 in the coupling 55 communicates with the upper end of the chamber 55. A pipe 19 interconnects the passages 55 and 59 and the ends of this pipe are screw-threaded into the ends of these passages.

In the body 55 is a'chamber 1l into which the pipe 3| leads and the outlet of this chamber is pro-vided by a bore 12 in the nozzle 54. A nee- 323 and pipe 3i into the chamber 1l.

dle Valve 13 projects across the chamber 1| and cooperates with the inner end of the bore 12 and by adjusting this needle valve relative to theend of the bore the volume of air permitted to ow from the chamber 1l through the bore 12 and into the bore 52 is regulated. There is a gap at the bottom of the pocket 53 between the inner end of the bore 52 and the adjacent end of the nozzle 54 and there is a space between the wall of the pocket 55 and the periphery of the nozzle 54. Air iiowing from the bore 12 into the bore 52 past the gap creates a Venturi `effect in the space for a purpose to be made apsitioned adjacent the outer end of the pocket 58 g and when the burner is to be set in operation this pilot light is lighted to burn with a long flame.

After the pilot llight has been lit the Valve 2l is opened and air under pressure flows freely through the regulating valve 28, pipe 29, tting The air then flows out through the bore 12 and is emitted from the end of the bore 62 Whereat this blast of air strikes the flame `from the pilot .light 14 and has the effect of defiecting this ame through the opening 5%? down into the passages 49 and 45, and this deflection is aided by the fact that the blast of air and the flame strike the shoulder 59. requiring a high capacity, the pocket 58 and the tapered bore 51 may be omitted and a straight bore will be provided in the nozzle- 5|. However, a suction is created in the passages 49 and 45, as will be explained, and the fiame from the pilot light 14 always passes into the passages 49 and 45. The flame flowing into the passages 49 and 45 and the heat therefrom passes through the slot 43 and vaporizes oil in the sump E. The Venturi effect created as described above tends to create a vacuurnlin the sump 5, slot 44, passage 46, chamber 55, passage 56, pipe 15, pipe 59 and chamber S8 and consequently as soon as any oil is vaporized the vapor will be drawn through the path just described tobe intermixed with air passing through the bore E52, Moreover, this suction is effective into the passages 49 and 45. As soon as the mixed air and vapor are emitted from the bore 52 and contact the flame from the pilot light 14, the mixture is ignited in the pocket 58 and a pressure is built up which combined with the suction effect causes a part of the flame to ilow through the opening 65 and into the passages 49 and 45 and cooperate with the iiame from the pilot light 14 to effect further vaporization of oil. Of course, the effect of the air blast owing through bore S2 is to force most of the flame through the bore 51. The flame in passages 49 and 45 tends to raise the temperature in the sump 5 and increase the vaporization and as more oil is vaporized and drawn up to be intermixed with the air a great-er flame is built up and as this occurs the valve 15 is manipulated to cut down the size of the flame from the pilot light 14., The flame from the pilot light 14 is gradually reduced as the flame resulting from the ignition of oil `vapor and air increases until the burner is operating as desired when the valve 15 is closed off. The flame flowing through the nozzle 5| raises the temperature thereof and con- When my burner is used under conditions ;1

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sequently vapor passing through the chamber 55 about the nozzle is heated as it flows over the heated nozzle which increases the efficiency of the combustion.

The needle valve i3 is adjusted to regulate the amount of air emitted through the bore 'i2 and this determines the maximum operation of the burner. The thermocouple 313 in the area heated by the burner responds to the temperature in the area, and as the temperature varies this thermocouple varies the potentiometer which in turn controls the electrically operated valve 28 to increase or diminish the quantity of air admitted into the chamber 'l5 as the temperature in the area heated by the burner drops or rises. When the quantity of air is diminished the Venturi effect is likewise diminished and consequently less Vapor is drawn from the sump t forintermixture with the air which reduces the size of the flame. Thus by controlling` the air supply the operation of the burner maybe regulated forjas more or less air flows through the bore l2 more or less oil Vapor is withdrawn from the sump 5 by the Venturi effect and the quantity of oil va'- por withdrawn determines the flame size and the heating eiect of the burner.

As oil is vaporized and withdrawn from the sump 5 additional oil is admitted into the sump from the overfiow device S. It is, of course, essential that uniform pressure be maintained in the sump 8 and overflow device 8 so that equal levels may be maintained therein and for this reason a pressure equalizing pipe le is provided which establishes communication between the chamber 55 and the cup Si. Hence since the top of the overflow pipe l2 is in the plane of the level of oil desired to be maintained in the sump ii a uniform level of oil may be maintained in sump so long as there is an oil supply in the cup 9, more oil being supplied to the sump as vaporization occurs.

My novel1oil burner is particularly adapted for commercial usages such as the heating of furnaces, boilers and the like but, of course, the invention is not limited to such usages. In the burner vaporization of the oil is effected by heat and the vapor is drawn toward the point of combustion by the air supply and is thoroughly intermixedwith the air prior to ignition. The burner is self-maintaining since a part of the flame is utilized to effect vaporization and this is accomplished by directing a part of the flame into an oil vaporizing chamber. Moreover, the burner may be regulated by merely controlling the volume of air supply which simplifies control of the burner and enables temperatures to be accurately-maintained. The burner is free of moving parts and inasmuch-as Vapor is burned and since this vapor is heated prior to combustion the formation of carbon and other deposits is reduced to a minimum. In the foregoing description I have described a preferred embodiment of my invention but it is to be understood that this is capable of variation and modication and I therefore do not wish to be limited to the precise details set forth but desire to avail myself of such changes and alterations as fall within the purview of the following claims:

I claim:

1. In an oil burner, a burner nozzle, means for directing a blast of air toward said burner nozzle, van oil vaporizing chamber, means pro'- viding a continuous passage interconnecting said chamber and said nozzle, a chamber in said nozzle adjacent said passage and into 'which 'said air blast is directed and from which a part of the ame may be deflected into said passage and toward said vaporizing chamber to heat oil therein to effect vaporization thereof, and means for directing oil vaporized in said chamber to said means directing an air blast toward said nozzle to thereby intermix the vapor and air prior to flow into and ignition in said'burner nozzle.

2. An oil burner including a tapered burner nozzle and having a pocket at the inlet end there- 1 of tapered oppositely to the taper of the outlet of the burner nozzle, a mixing nozzle discharging into the pocket in said burner nozzle, said mixing nozzle having a vapor inlet and an air passage leading past said vapor inlet whereby 1 air flowing through said passage creates asuction in said vapor inlet, said mixing nozzle including an adjustable part for varying the size of said vapor inlet whereby the flow of Vapor through said inlet may be adjusted proportionately to air flowing through the air passage in said mixing nozzle, casing means including a passage having an oil vaporizing chamber therein and an outlet leading to the vapor inlet in said A mixing nozzle and an with said pocket vmereby a part of the flame in said pocket is deiiectedl into said inlet and toward the Vaporizing chamber to heat the oil therein and effect vaporization thereof, and

means supplying air under pressure to the air 3 passage of said mixing nozzle whereby air flowing through said air passage withdraws oil vapor from said vaporizing chamber to be mixed with the air owing through said air passage, the air and vapor mixture being ignited in said burner 3 nozzle.

3. An oil burner including a tapered burner nozzle and having a pocket at the inlet end thereof tapered oppositely to the taper of the outlet of the burner nozzle, a mixing nozzle discharging into the pocket in said burner nozzle, said mixing nozzle having a vapor inlet. and an air passage leading past said vapor inlet whereby air flowing through Asaid passage creates a suction in said vapor inlet, casing means including a passage having an oil vaporizing chamber therein and an outlet leading to the Vapor inlet in said mixing nozzle and an inlet communicating with said pocket whereby a part of the ame in said pocket is deiiected into said inlet and to- 5 ward the vaporizing chamber to heat the oil therein and effect vaporization thereof, means supplying air under pressure to the air passage of said mixing nozzle whereby air iiowing through said air passage withdraws oil vapor from said 5 Vaporizing chamber to be mixed with the air flowing through said air passage, the air and Vapor mixture being ignited in said burner nozzle, and means for regulating the air supply to the air passage in said mixing nozzle whereby 6i variation of the air supply varies the suction in vsaid vapor inlet to vary the oil vapor and air mixture in said mixing nozzle and thereby regulate the ignition of said mixture in said burner nozzle. '6 4. An oil burner including a tapered burner nozzle and having a pocket at the inlet end thereof tapered oppositely to the taper of the outlet of the burner nozzle, a mixing nozzle discharging into the pocket in said burner nozzle, said 7 mixing nozzle having a vapor inlet and an air passage leading past said vapor inletV whereby air flowing through said passage creates a suction in said vapor inlet, said mixing nozzle including an adjustablev part for varying the size 7 inlet communicating 25 of said vapor inlet whereby the flow of vapor through said inlet maybe adjusted proportionvately to air flowing through the air passage in said mixing nozzle, casing means including a passage having an oil vaporizing chamber therein and an outlet leading to the vapor inlet in said mixing nozzle and an inlet communicating with said pocket whereby a part of the flame in said pocket is deflected into said inlet and toward the vaporizing chamber to heat the oil therein and effect vaporization thereof, means supplying air under pressure to the air passage of said mixing nozzle whereby air flowing through said air passage withdraws oil vapor from said vaporizing chamber to be mixed with the air flowing through said air passage, the air and vapor mixture being ignited in said burner nozzle, and means for regulating the air supply to the air passage in said mixing nozzle whereby variation of the air supply varies the suction in said vapor inlet to vary the oil vapor and air mixing in said mixture nozzle and thereby regulate the ignitionof said mixture in said ,burner nozzle.

5. An oil burner including a tapered burner nozzle and having a pocket at the inlet end thereof tapered oppositely to the taper of the outlet of the burner nozzle, said pocket being open at the larger end thereof, a mixing nozzle having the outlet end thereof opening into the open side of said pocket whereby a mixture emitted from said mixing nozzle flows into said'pocket to be ignited in said burner nozzle, said mixing nozzle having a vapor inlet and an air inlet leading past said vapor inlet whereby air flowing through said passage creates a suction in said vapor inlet, casing means including an oil vaporizing chamber and having an inlet passage leading from said pocket to said vaporizing chamber an-d an outlet passage leading from said vaporizing chamber to the vapor inlet in said mixing nozzle, a part of the flame in the pocket of said burner nozzle being deflected through said inlet passage and toward said vaporizing chamber to heat the oil therein and effect vaporization thereof, means supplying air under pressure to the air passage of said mixing nozzle whereby air flowing through said air passage withdraws oil vapor through said vapor inlet from said vaporizing chamber to be mixed with the air flowing through said air passage, and valve means at the inlet of said air passage for regulating the air supply thereto to vary the suction created in said vapor inlet and thereby vary the mixture in said mixing nozzle whereby the ignition of the mixture in the burner nozzle is controlled.

6. An oil burner including a burner nozzle, a mixing nozzle discharging into said burner nozzle, casing means providing an o-il vaporizing chamber in which a supply of oil is maintained, said chamber being located below said mixing nozzle to prevent gravity flow of oil from said chamber to said burner nozzle, means in said chamber and projecting into the oil therein and dividing the chamber into an inlet and an outlet side, said casing means including an outlet leading from the outlet side of said vaporizing chainber to said mixing nozzle and an inlet leading from the inlet side of said vaporizing chamber and through which a part of the flame vin said burner is deflected toward said vaporizing :charnber to heat the oil therein and effect vaporization of the oil, means supplying air under pressure to said mixing nozzle to create a suction in said outlet whereby oil vapor may bedrawn past 'the means in said chamber to said mixing nozzle for mixture with air flowing through said mixing nozzle, the air and vapor mixture being ignited insaid burner nozzle, and means for regulating the air supply to said mixing nozzle to thereby regulate the withdrawal of oil vapor from said vaporizing chamber and control the ignition of the mixture in said burner nozzle.

'7. An oil burner including a burner nozzle, a mixing nozzle discharging into said burner nozzle, casing means providing an oil vaporizing chamber in which a supply of oil is maintained, said` chamber being located below said mixing nozzle to prevent gravity flow of oil from said chamber to said burner nozzle, means in said chamber and projecting into the oil therein and dividing the chamber into an inlet and an outlet side, said casing means including an outlet leading from the outlet side of said vaporizing chamber to said mixing nozzle and an inlet leading from the inlet side of said vaporizing chamber to said burner nozzle, and means supplying air under pressure vto said mixing nozzle to create a suction in said outlet and the outlet side of said vaporizing chamber whereby a suction is created past the means in said chamber in said inlet to thereby deflect a part of the flame in said burner nozzle into said inlet and toward the oil in said chamber and effect Vaporization of the oil whereby the oil vapor thus created is withdrawn through said outlet 'to said mixing nozzle for mixture with air flowing through said mixing nozzle, the air and vapor mixture being ignited in said burner nozzle, and means for regulating the air supply to said mixing nozzle to thereby regulate the withdrawal of oil vapor from said vaporizing chamber and control the ignition of the mixture in said burner nozzle.

8. An oil burner including a burner nozzle, a mixing nozzle discharging into said burner nozzle, casing means providing an oil vaporizing chamber in which a supply of oil is maintained, said chamber being located below said mixing nozzle to prevent gravity vflow of oil fromsaid chamber to said burner nozzle, means in said chamber and projecting into the oil therein and dividing the chamber into an inlet and an outlet side, said casing means including an outlet leading from the outlet side of said vaporizing chamber to said mixing nozzle and an inlet leading from the inlet side of said vaporizing chamber to said burner nozzle, means for deflecting a part of said flame in said burner nozzle into the inlet and toward the vaporizing chamber to heat the oil in said chamber and effect vaporization of the oil,

means supplying air under pressure to said mixing nozzle to create a suction in said outlet and the outlet side of said vaporizing chamber whereby a suction is created past the means in said chamber and in said inlet to thereby cooperate with the means Ideflecting a part of the flame to insure vaporization of the oil, the suction in said outlet withdrawing oil vapor from said vaporizing chamber to said mixing nozzle for mixture with air flowing through the mixingl nozzle, the oil and vapor mixture being ignited in said burner nozzle, and means for regulating the air supply to said mixing nozzle to thereby regulate the with- Vdrawal of oil Ivapor from said vaporizing chamber and control the ignition of the mixture in said burner nozzle.

9. An oil burner including a burner nozzle embodying a pocket having an opening in the Wall thereof, a mixing nozzle discharging into said burner nozzle, casing means providing an oil vaporizing chamber in which a supply of oil is maintained, said chamber being located below said mixing nozzle to prevent gravity flow of oil from said chamber to said burner nozzle, a rib in said chamber and projecting into the oil therein and dividing the chamber into an inlet andan outlet side, said casing means including an outlet. leading from the outlet side of said vaporizing chamber to said mixing nozzle and an inlet leading from the inlet side of said vaporizing chamber to the opening in the wall of said pocket whereby a part of the flame in said burner nozzle is deflected through said opening and said inlet into the inlet side of said vaporizing chamber to effect vaporization of the oil therein, means supplying air under pressure to said mixing nozzle to create a suction in said outlet and the outlet side of said vaporizing chamber whereby a suction is created past the rib in said chamber and in said inlet whereby a name deflected through the opening'in the wallV of said pocket is drawn toward the oil in said vaporizing vchamber to insure vaporization of the oil therein, the suction in said outlet withdrawing oil vapor from said vaporizing chamber to said mixing nozzle for mixture with air ilowing through the mixing nozzle, the oil and vapor mixture being ignited in said burner nozzle, and means for regulating the air supply to said mixing nozzle to thereby regulate the withdrawal of oil vapor from said vaporizing chamber and control the ignition of the mixture in said burner nozzle,

10.1An oil burner including a burner nozzle, a mixing nozzle discharging into said burner nozzle, casing means providing an oil vaporizing chamber, said chamber being located below said mixing nozzle to prevent gravity flow of oil from said chamber to said burner nozzle, means for maintaining a predetermined level of oil in said vaporizing chamber, means in said chamber and projecting into the oil therein and dividing the chamber into an inlet and an outlet side, said casing means including an outlet leading from the outlet side of said vaporizing chamber to said mixing nozzle and an inlet leading fromthe inlet side of said vaporizing chamber and through which a part of the flame in said burner nozzle is deected toward said vaporizing chamber to heat the oil therein and effect vaporization of the oil, means supplying air under pressure to said mixing nozzle to create a suction in said outlet whereby oil vapor may be drawn past the means in said chamber to said mixing nozzle for mixture with air flowing through said mixing nozzle, the air and vapor mixture being ignited in said burner nozzle, and means for regulating the air supply to said mixing nozzle to thereby regulate the withdrawal of oil vapor from said vaporizing chamber and control the ignition of the lmixture in said burner nozzle.

11. An oil burner including a burner nozzle, a mixing nozzle discharging into said burner nozzle, casing means providing an oil vaporizing chamber, said chamber being located below said mixing nozzle Vto prevent gravity iiow of Yoil from said chamber toy said burner nozzle, a member communicating with said oil vaporizing chamber and having means therein for maintaining a predetermined level of oil in said vaporizing chamber, means forequalizing the pressure in said chamber and said member, means in said chamber and projecting into the oil therein and dividing the chamber into an inlet and an outlet side, said casing means including an outlet leading from the outlet side of said vaporizing chamber to said mixing nozzle and an inlet leading mixing nozzle discharging nozzle, the air and vapor mixture being ignited 10- in said'burner nozzle, and means for regulating the air supply to said mixing nozzle to thereby regulate the withdrawal of oil vapor from said vaporizing chamber and control the ignition of thev mixture in said burner nozzle. 15 12. An oil burner including a burner nozzle, a mixing nozzle discharging into said burner nozzle, casing means providing an oil vaporizing chamber, said chamber being located below said mixing nozzle to prevent gravity iiow of oil from 2o said chamber to said burner nozzle, said casing means including an outlet directed to said mixing nozzle and an inlet through which a part of the flame in said burner nozzle is deiiected toward said vaporizing chamber to heat oil there- 25 in and effect Vaporization of the oil, means supplying air under pressure to said mixing nozzle to create a suction in said outlet to withdraw oil vapor from said chamber for mixing with ail. flowing through the mixture nozzle, the air and vapor mixture being ignited in said burner nozzle whereby said 'burner nozzle is heated, said burner nozzle extending across said outlet whereby oil vapor owing through said outlet contacts with the heated burner nozzle to be heated thereby 35 prior tomixture with the air, and means for regulating the air supply to said mixing nozzle to thereby regulate the withdrawal of oil vapor-from said vaporizing chamber and control the ignition of the mixture in said burner nozzle. 40 13. An oil burner including a burner nozzle, a

mixing nozzle discharging into said burner nozzle, casing means providing an oil vaporizing chamber, said chamber being located below said mixing nozzle to prevent gravity flow of oil from 45 said chamber to said burner nozzle, said casing `means including an outlet directed into said mixing nozzle and an inlet arranged adjacent said burner nozzle, means for deflecting a part of the flame in said burner nozzle into said inlet and 50 toward the vaporizing chamber to heat the oil in Asaid chamber and effect vaporization of the oil,

means supplying air under pressure to said mixing nozzle to create a suction-in saidoutlet to withdraw oil vapor from said chamber for mix- 55 ture with air flowing through the mixing nozzle,

lsaid mixing nozzle to thereby regulate the`with- Ydrawal of oil vapor from said vaporizing cham- 65 ber and control the ignition of the mixture in said burner nozzle. j

14. An oil burner including a burner nozzle, a intov said burner nozzle, casing means including a passage having an oil vaporizing chamber. therein andan outlet directed to the mixing nozzle and an inlet through which a part of the name in the burner nozzle is deflected toward said vaporizing chamber to heat oil therein and effect vaporization of 75 the oil, the chamber being located below'the mixing nozzle to prevent gravity flow of oil from said chamber to the burner nozzle, means supplying air under pressure to the mixing nozzle to create a suction in the outlet and withdraw oil vapor from the chamber for mixture with air flowing through the mixing nozzle, and means controlling air ow to said mixing nozzle, the withdrawal of oil Vapor from said vaporizing chamber and the combustion of the air and vapor mixture in said burner nozzle being controlled by the air flow to said mixing nozzle.

15. An oil burner including a burner nozzle, a mixing nozzle discharging into said burner nozzle, casing means including a passage having an oil vaporizing chamber therein and an outlet directed to the mixing nozzle and an inlet arranged adjacent the inlet of the burner nozzle, means for deiiecting a part of the flame in the burner nozzle into the inlet of said passage and toward the vaporizing chamber to' heat oil in said chamber and effect vaporization of the oil, the cham'ber being located below the mixing nozzle to prevent gravity flow of oil from said chamber to the burner nozzle, means supplying air under pressure to the mixing nozzle to create a suction in the outlet and withdraw oil vapor from the chamber for mixture with air flowing through the mixing nozzle, and means controlling air iiow to said mixing nozzle, the withdrawal of oil vapor from said Vaporizing chamber and the combustion of the air and Vapor mixture in said burner nozzle being controlled by the air now to said mixing nozzle.

16. An oil burner including a burner nozzle having a pocket at the inlet end thereof, a mixing nozzle discharging into the burner nozzle, casing means including a passage having an oil vaporizing chamber therein and an outlet directed to the mixing nozzle and an inlet communicating with the pocket in the burner nozzle whereby a part of the flame in the pocket is deflected into the inlet of said passage and toward the vaporizing chamber to heat oil therein and effect vaporization of the oil, the chamber being located below the mixing nozzle to prevent gravity flow of oil from said chamber to the burner nozzle, means supplying air under pressure to the mixing nozzle to create a suction inthe outlet and withdraw oil vapor from the chamber for mixture with air flowing through the mixing nozzle, and means Vcontrolling air flow to said mixing nozzle, the withdrawal of oil vapor from said vaporizing vchamber and the combustion of the air and vapor mixture in said burner nozzle being controlled by the air iiow to said mixing nozzle.

17. An oil burner including a burner nozzle embodying a pocket having an opening in the wall thereof, said pocket being located adjacent the inlet end of said burner nozzle, a mixing nozzle discharging into the burner nozzle, casing means including a passage having an oil .vaporizing chamber therein, and an outlet directed to the mixing nozzle and an inlet communicating with the opening in the wall of said pocket whereby a part of the flame in said pocket is deflected through the opening into the inlet of said passage and toward the vaporizing chamber to heat oil therein and effect vaporization of the oil, the chamber being located below the mixing nozzle to prevent gravity flow of oil from said chamber to the burner nozzle, means supplying air under pressure to the mixing nozzle to create a suction in the outlet and withdraw oil vapor from the chamber for mixture with the air ilowing through the mixing nozzle, and means controlling air ow to'said mixing nozzle, the Withdrawal of oil vapor from said vaporizing chamber and the combustion of the air and vapor mixture in said burner nozzle being controlled by the air flow to said mixing nozzle.

18. An oil burner inbluding a burner nozzle embodying a pocket having a shoulder therein, said pocket being located adjacent the inlet end of said burner nozzle, a mixing nozzle discharging into the burner nozzle, casing means including a passage having an oil vaporizing chamber therein and an outlet directed to the mixing nozzle and an inlet communicating with said pocket, an oil and air mixture admitted from the mixing nozzle being ignited in the burner nozzle and striking the shoulder in the pocket to create a pressure therein whereby a part of the flame is directed through the inlet 0f said passage and toward the vaporizing chamber to heat oil therein and eiect vaporization of the oil, the chamber being located below the mixing nozzle to prevent gravity flow or" oil from said chamber to the burner nozzle, means supplying air under pressure t0 the mixing nozzle to create a suction in the outlet and withdraw oil vapor from the chamber for mixture with air iiowing through the mixing nozzle, and means controlling air flow to said mixing nozzle, the withdrawal of oil vapor from said vaporizing chamber and the combustion o the air and vapor mixture in said burner nozzle being controlled by the air flow to said mixing nozzle.

19. An oil burner including a tapered burner nozzle and having a pocket at the inlet end thereof tapered oppositely to the taper of the outlet of the burner nozzle, a mixing nozzle discharging into said burner nozzle, said mixing nozzle having a vapor inlet and an air passage leading past said vapor inlet whereby air flowing through said passage creates a suction in said Vapor inlet, casing means including a passage having an oil vaporizing. chamber therein and an outlet leading to the Vapor inlet inrsaid mixing nozzle r and having an inlet communicating with said pocket whereby a part of the name in said pocket is deflected into the inlet of said passage and toward the vaporizing chamber to heat the oil therein and eiect vaporization of the oil, the chamber being located below the mixing nozzle to prevent gravity flow of oil from said chamber to the burner nozzle, means supplying air under pressure to the air passage in said mixing nozzle whereby air flowing through said air passage withdraws oil vapor from the vapo-rizing chamber to be mixed with the air flowing through said air passage, and means controlling air flow to said mixing nozzle, the withdrawal of oil vapor from said vaporizing chamber and the combustion of the air and vapor mixture in said burner nozzle being controlled by the air ow to the air passage in said mixing nozzle.

GUSTAVE BLUEMEL.

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