US2837149A

US2837149A - Top plate air deflector for pot burners

Info

Publication number: US2837149A
Application number: US344353A
Authority: US
Inventors: Carl B Richardson
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-03-24
Filing date: 1953-03-24
Publication date: 1958-06-03
Anticipated expiration: 1975-06-03

Description

June 3, 1958 c. B. RICHARDSON 2,837,149

- TOP PLATE AIR DEF'LECTOR FOR POT BURNERS Filed March 24, 1955 26 3 i7 I 7 12-, I I. 1 1 f V l f 2 T'WlqllIlllllllrnlvlll|vlll|xl r%fi 2 2 ,4 m o o o a o 1 United States Patent Z,837,l49 Patented June 3, 1958 I ass/1,149 I TOPVPLATE AIR DEFLECTOR FOR POT BURNERS can B. Richardson, Norfolk, Va.

Application March 24, 1953, Serial No. 344,353

1' Claim. (Cl. 158- 91) This invention relates generally to the class of fuel oil burners and is-directed particularly to improvements in pot type burners.

An object of the present invention is to provide an oil burner of the pot type having a novel head or top construction designed ,to effect a prescribed movement of air into the flame opening of the burner structure whereby the rising fuel vapors will be more or. less concentrated in the central part of the pot and thoroughly mixed with the combustion air to effect as nearly a perfect combustion or burning of the fuel as is possible.

Another object of the invention is to provide inan oil burner of the pot type, .a novel air control or air defleeting means associated with the top or head of the burner structure whereby the maximum heating eflect will be obtained from the fuel introduced with substantially complete elimination of carbon formation and, consequently, of smoking after the burner reaches the proper or desired operating temperature.

'A further and more specific object of the invention is to provide in a fuel oil burner of the pot type, a top air deflecting plate having a central opening definedat its underside or underedge by a downwardly inclined lip by means of which inflowing air is deflected downwardly and inwardly toward the axial center of the pot instead of flowing directly radially inward as in the usual type of construction.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming a part of the specification, with the understanding, however, that the invention is not to be limited to the exact details of construction shown and described since obvious modifications will occur to a person skilled in the art.

In the drawing: 7

Figure 1 is a vertical central section through a fuel oil burner of the pot type constructed in accordance with the present invention showing the present improved top or air deflecting plate.

Figure 2 is a sectional view taken substantially on the line 22 of Figure 1 looking upwardly toward the underside of the air deflecting plate.

Figure 3 illustrates on an enlarged scale the detailed sectionof the air deflecting lip as shown in Figure 1.

Figure 4 illustrates on an enlarged scale a slight modification of the air deflecting lip form.

Referring now more particularly to the drawing the numeral generally designates an air housing in which a static air pressure is maintained in accordance with customary practice, the air being supplied from a suitable source such as an air pump or the like, not shown, through the pipe or conduit 11 which opens through the side wall of the housing 10 as illustrated.

The pot burner unit constructed in accordance with the present invention is generally designated 12. This burner comprises the bottom pan or receptacle 13 which, in accordance with the present invention, has a bottom wall 14 and a low side wall 15 formed of thick or heavy cast iron or steel. Forming a continuation of the low thick or heavy wall 15 is the thinner circular wall 16 which is formed of-light weight sheet steel and which encircles the top edge of the low wall 15 and is secured thereto in a suitable manner as, for example, by the use of screws 17 or the like.

The wall16 is provided with numerous air admission apertures 18 whereby air may enter from the housing 10, the overall diameter of the wall 16 being materially less than the inside diameter of the housing 10 as shown whereby space is provided around the pot for free movement of air.

The top of the pot is closed by the'head plate 19 which is provided with the depending annular flange 20 which 'fits within the wall 16, togwhich it is secured in a suitable manner by the employment of screws 21 or the like. The head plate 19 is provided with the central opening22 through which the flame of the burning gases discharge.

Overlying the head plate 19 is the air deflector plate 23. This deflector plate'is of an overall diameter approximately equalling the inside diameter of the housing 10 so that it forms, a horizontal partition in the housing above the pot burner and it is secured in place by means of the long bolts 24 which pass down through the defiector plate, between the wall of the housing 10' and the wall of the pot burner to be secured in the bottom of the housing as illustrated. In addition the shorter bolts 25 are employed for directly coupling the deflector plate 23 with the head plate 19.

The deflector plate 23 is maintained in spaced relation with the top of the'plate 19 by the annular series of spacers downwardly directed or depending lugs 26 which rest upon the top of the head plate 19 and form a circle having an inside diameter approximately the same as the diameter of the opening 22. The deflector plate 23 has the central opening 27 which is of slightly smaller diameter than the opening 22 in the head plate 19, as shown in Figure 1. I

As shown in detail in Figure 3 the top edge of this opening is rounded slightly as indicated at 28 and the opening is defined on the underside of the plate by the depending lower edge lip 29 which has the two downwardly converging

faces

30 and 31.

As is clearly illustrated in Figure 3 the outer one of the two converging faces, which is indicated by the numeral 30, extends from the plane of the under face of the plate 23 or from the tops of the spacer lugs 26.

The inner sloping face 31 also starts from the plane of the under face of the plate 23 and slopes downwardly and outwardly to intersect the face 30.

The top surface of the bottom 14 of the pan 13 has at the center thereof the upstanding mound 32 through the axial center of which is formed the fuel inlet port 33, with which is connected the fuel supply pipe 34. This mound has the downwardly and outwardly sloping top side surfaces designated a and b respectively which lead to the outwardly and downwardly sloping top surface of the bottom 14 as shown.

On the top surface of the bottom wall 14 is formed an annulus 35 and within the annulus are concentric broken annuli 36 for the purpose set forth in the co-pending application Serial No. 344,351, filed March 24, 1953.

The form or construction and operation of the lower part or pan section of the pot burner is described and claimed in the co-pending application referred to and accordingly a detailed description of such construction and operation is not here set forth.

As is also set forth in the co-pending application the fuel oil supply pipe has a smooth or threaded rod 37 3 v therein, having opposite flat sides 38 whereby to permit oil to flow upwardly through the .port .33 .and pipe .34 into the burner. This rod facilitates the volatilization of the oil by conducting heat from the flame within the burner down .into the oil pipe :line thereby pre-heating the oil.

Figure 4'illustra'tes -a slightly modified form of the air deflecting plate and 'the deflecting lip at the edge of the central opening'ther'eof. In this modified construction the plate is generally designated 23a and :is devoid :of the integral supporting lugs upon the underface such as the lugs 26 shown in Figures 1 and 3. This modified plate construction employs a plurality of spacer sleeves 39 through which the coupling bolts125a'pass.

The opening'in the plate .23a is designated MB-and is defined upon the underside of'the plate by the de'pendin-g lip 20a which has the outer and inner downwardly converging faces 30a and 31a. The edge of the lip 29a formed by the intersecting converging faces 30a and 31a is disposed. approximately above the edge of the opening 22 of the topplate 19 .as shown. i

It will be seen upon reference :to Figure 1 that in the operation of the burner some of theair within the casing it) enters through the side wall openings 18 and some of the air passes inwardly between the

plates

19 and 23. This latter air strikes the downwardly :and inwardly inclined deflecting face 30 -'of the .lip 29, causing the air to move downwardly and inwardly in opp'ositionto the upwardly rising air from the burner, whichhas entered by way of the openings 18. Thus there will be .a :slight downwardly beating of the vaporized fuel causing it to mix thoroughly with the air within the pot, at ;the reenter of the latter so that substantially complete combustion is effected and the :formation ofcarbon is eliminated.

With the modified lip construction shown in .Figure 4 the same deflection is given to the air entering between the plates.

By reason iof'the construction of the air defiector'plate herein .set forth the .efliciency of the burner as 'a'whole is improved to the "point where the burner may be rop- 4 erated with complete elimination of smoke or carbon deposit.

I claim:

A fuel oil burner of the pot type comprising a combustion chamber having a bottom wall, a sidewall and a top plate carried by the sidewall, the top plate having a central flame opening, the sidewall having air admission openings, a static air chamber enclosing the combustion chamber and having a sidewall surrounding and spaced from the combustion chamber sidewall, "an air deflector plate closing the upper end of :said ;air chamber and overlying said top plate in spaced relation thereto, said air plate having a central opening conce'ntr ic with the top plate opening means comprising a plurality of spaced lugs depending from said air plate and integral therewith and engaging the upper surface of said top plate to maintain the spacing between said top plate and air plate and a depending air deflecting lip on the under side of said air plate, said lip-having a .downwardly and inwardly inclined outer surface'for deflecting 'infiowin'g air downwardly and inwardly toward the'a'xial center of the combustion chamber and a downwardly and outwardly inclined inner surface on saidlip intersectingsa'id outer surface ito'form an annular edge, said annular edge defining a circle and disposed in a plane 'abovethe'plane of the top surface of said top plate, the'diameter of said top plate opening beingat least as great as the diamete of 'said annular edge.

References Cited in-the fileof this-patent UNITED STATES PATENTS 1,897,314 Little Feb. ,14, 19.33 2,214,420 Kessler et a1. Sept. 110,.51940 2,250,045 Focke et a1 July .22, 1941, 2,286,497 Miceli et a1. June 16, 1942 2,357,454 Brown .Sept. .5, 1-944 2,373,910 Perry et al. Apr. 17,1945 2,404,039 Castle July 16, .1946.

2,468,156 Baity Apr. 26, 4949