US2460013A

US2460013A - Quadrant pilot for pot type oil burners

Info

Publication number: US2460013A
Application number: US442425A
Authority: US
Inventors: Milton D Huston
Original assignee: BREESE BURNERS Inc
Current assignee: BREESE BURNERS Inc
Priority date: 1942-05-11
Filing date: 1942-05-11
Publication date: 1949-01-25
Anticipated expiration: 1966-01-25

Description

Jan.`25, M. n. Hus'roN 2,469,933

QUADRANT PILOT FOR POT TYPE OIL BURNERS 'Filed Nay l1, 1942 Patented Jan. 25, 1949 2,460,013 QUADRANT PILOT Foa Por TYPE om BURNERs e Milton D. Huston, Chicago, Ill., assignor, by mesne assignments, to Breese Burners, Inc., Santa Fe, N. Mex., a corporation of Delaware Application May 11, 1942, Serial No. @12,425 v 2 Claims.

My invention relates to an improvement in pilot devices for pot type burners and hasfor one purpose the provision of an improved device vfor maintaining a low or pilot flame in a pot type.

Another purpose is the provision of improvedpilot means for surrounding the fuelv inlet aperture or nozzle.

Other purposes will appear from time to time in the course of the specification. I illustrate my invention more or less diagrammatically in the accompanying drawings wherein:

Fig. l is a vertical axial section;

Fig. 2 is a partial section on the line 2--2 of Fig.'1;

Fig. 3 is a partial section on the line 3-3 of Fig. 1; and f Fig. 4 is a detail.

Like parts are indicated by like symbols throughout the specification and drawings. y

Referring to the drawings, I indicates any suitable heater outer housing or drum, herein illustrated as being mounted on legs 2, which provide air inlet spaces 3. 4 is a bottom partition having a centrall air inlet aperture 5 whereby the atmospheric air which passes through the spaces 3 may enter the space within the housing. 6 is a supporting angle ring mounted intermediate top and bottom of the housing, centrally apertured to receive the top flange 8 of a burner pot 1. The burner pot is shown as having an upwardly concave bottom 9 adapted to receive fuel from the pipe I from any suitable source of liquid fuel not herein shown.

Any suitable means may be employed for varying the ow of liquid fuel inwardly along the pipe Ill.- Since such means are well known, they are not herein illustrated in detail, but it is understood that the volume or rate of iiow of fuel admitted along the fuel pipe I0 may be manually or thermostatically controlled to provide a relatively small ow of fuel at the pilot stage and a larger iiow of fuel when the heating demand rises.

The upper space within the housing l above the ring 6 serves as a'combustion chamber. The open top of the pot 1 may be closed by any suitable ame ring Il, with a central aperture I2. The wall of the pot 1 is provided with a plurality of primary air inlet apertures I3, located at various tilted. Any suitable means may be employed for admitting secondary air at or adjacent the top of the pot. I illustrate for example a row of secondary air inlets I4, which are more closely spaced than the inlets I3 and preferably upwardly tilted.

It will be understood that the entire fuel supply is delivered to the bottom 9 of the pot along the pipe Ill. Surrounding the area of admission of the fuel I provide a pilot piece which I m.. A i-.al a quadrant, generally indicated as I5 arfiincluding a pair of generally radial inwardly converging vertical Walls I6, which may be cut away at top and at bottom, as at I1, I8, to provide

apertures I

9 and 20, respectively.

I nd it preferablevto provide a cover 2l for the top of thek pilot piece, the cover 2| being cut away at `its inner corner, as at 22. I nd it con venient to employ an arcuate edge, although th: form of the edge may, if desired, be varie-ci, i' may provide any suitable means for pcsitionlng the quadrant, or pilot piece, in place. I illustrate for example inwardly extending pins 23. Aligned with and engaging these pins 23 I may employ outwardly extending and preferably yielding or springy portions 24, on the side walls I6, whereby the pilot piece is located in position but may readily be removed. Preferably the lower edges of the walls I6 fit snuglyalong the bottom of the pot 9.

While I have described the walls I 6 as generally radial, they converge, as a matter of fact, a little short of the center of the pot. The space within the pilot piece is provided with 'air through the normal primary air inlet apertures I3. I may, if desired, add additional air inlet apertures, as at I3a., to increase the supply of air within the pilot piece, but this is not generally necessary.

Also, the apertures within the pilot piece or quadrant may be somewhat larger, if necessary, than the apertures located in the portion of the pot not opposed to the quadrant. Regardless of the number or size of the apertures employed, however,'the air admitted to the space Within the quadrant is suflicient in volume to provide the primary air necessary for forming a primary mixture with the vaporized hydrocarbon. The fuel is vaporized by the heat of combustion already going on, and when only a pilot ow is maintained, all of the hydrocarbon will be vaporized before any of it can flow out of the bottom aperture I8 of the pilot piece. Complete vaporization takes place within the quadrant, and the primary mixture burns at the bottom of the burner at or va rate of flow of fuel which will cause a considerable jet of flame to pass from the aperture `I1 across the bottom of the pot, thus keeping the pot bottom heated. Under thosel circumstances, when the rate of flow is increased, the pot bottom is already hot, and vaporization oi the liquid fuel throughout the pot bottom is very rapidly initiated.

It is advantageous, if not necessary,'-to direct some of the air within the quadrant downwardly toward the bottom of the pot. The lowest row of holes I3 being downwardly tipped, there 'is a convergence of air from these holes adjacent the aperture I1. The primary air inlet apertures within the quadrant provide al1 of the primary air necessary for combustion, and the mixture picks up the necessary secondary air as it passes outwardly through the apertures I1 and 20, and fullV combustion takes place outside of the quadrant. y It would be possible under some circumstances` to maintain combustion within the quadrant, especially where a very low rate of iiow is maintained. In that case the lower row of holesmay provide the primary air, and the upper row the secondary air. However, -the desirable condition is a maintenance of a jet of flame extending outwardly across the bottom of the pot from the aperture I9.

It will be realized that, whereas I have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departingY from the spirit of my invention. 'I therefore wish that my description and drawings be taken as in a broad sense illustrative or diagrammatic, rather than as a limitation to my precise showing. For example, the shape'of the quadrant may be widely changed. It is advaritageclus,l however, to form the quadrant of converging walls and to have the walls define an aperture or apertures preferably including an aperture at the bottom of the pot, from which aperture the jet of pilot flame may extend across the bottom of the pot to maintain the bottom ofv the pot properly heated.

I claim: 1. In combination, an open topped burner pot vhaving a circumferential Wall provided with a plurality of primary air inlet apertures located at various levels in the wall, means for delivering secondary air to the mixture of primary air and vaporized fuel moving upwardly through the pot and a pilot housing surrounding the area of admission of the fuel to the pot and defining a space in communication with a plurality of the lower primary air inlet apertures of the pot, said housing including a pair of generally upright side walls, extending inwardly from the circumferential pot wall and meeting at their inner edges, and a cover portion located below the level of the highest of the primary air inlet apertures and below the level of admission of secondary airY to the mixture, the edges of the side walls adjacent their juncture and adjacent the bottom ofthe pot, deiining a iiame aperture in communication with the interior of the pot, and means for delivering liquid fuel to the pot at a point enclosed by said pilot housing.

2. In combination, an open topped burner pot having a circumferential wall provided with a plurality of primary air inlet apertures located at various levels in the wall, means for delivering secondary air to the mixture of primary air and vaporized fuel moving upwardly through the pot and a pilot housing surrounding the area of admission of the fuel to the pot and deilning a space in communication with a plurality of the lower primary air inlet apertures of the pot, said housing including a pair of generally upright side walls, extending inwardly from the clrcumfer-r ential pot wall and meeting at their inner edges, and a cover portion located below the level of the highest of the primary air inlet apertures and below the level of admission of secondary air to the mixture, the edges of the side walls adjacent their juncture and adjacent the bottom of the pot, dening a flame aperture in communication with the interior of the pot, and also deiining, adjacent their junction'with each other and with the cover portion, a second dame aperture incommunication with the interior of the pot, and means for delivering liquid fuel to the pot at a point enclosed by said pilot housing.

' MILTON D. HUSTON.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS France May 24, 1937