US2479889A - Pot type oil burner with air preheating means - Google Patents

Description

Aug. 23, 1949. c. E. YOUNG POT TYPE OIL BURNER WITH A-IR PREHEATING MEANS c .0009. 1.0.0.... uottuiluu anon..-

mean-an c INVEN TOR.

Patented Aug. 23, 1949 ro'r me on. BURNER wrm AIR ramsa'rmc means Cecil lihYoung, Arlington, Tex, signer to Moore, Dallas, Tex.

Application August 9, 1848, Serial No. 589,385

1 Claim. (01. 158-91) This inventionrelates to oil burners and has for one of its objects the production of a natural draft or forced draft oil burner wherein hot air is directed to the top of the burner to facilitate mixing of the air with the gas vapors near the top of the burner to provide complete combustion of the fuel.

A further object of this invention is the production of a simple and eflicient oil burner having an automatically closing choke door for controlling the draft while lighting the burner.

Other objects and advantages of this invention iwill appear throughout the following specifica- In the drawing:

Figure 1 is a top plan view partly shown in section and illustrating the burner and sump.

Figure- 2 is a vertical sectional view of the burner. v

Figure 3 is an exploded view of the burner, the parts being shown in section and drawn apart.

By referring to the drawing, it will be seen that ill designates the fire pot of the burner in the nature of a cylindrical shell having a closed.

dished bottom II and an open top I2. The fire pct III 'is provided with a lateral flange l3 around the top thereof, which flange l3 overhangs the burner support l4 and this flange I3 is anchored in place by suitable screws I I.

The support I415 carried by the burner housing I 6 which housing carries a suitable finishing ring il to cover the screw heads it of the burner housing It.

The fire pot Ill is provided with an inset ledge portion i9 intermediate the bottom and top thereof, dividing the fire pot into a lower chamside cylindrical wall of the upper chamber 2i is provided with air inlet openings 24.

The fuel pipe leads to a T connection 25 which carries a valve 26 extending at right angles to the fuel pipe 23. An operating handle 21 of the conventional type is carried by the valve 26 and extends beyond the casing or support 23 which connects the sump 29 with the burner housing I6.

A line 30 of a suitable type connects the sump or fuel supply reservoir 29 to the valve 26, where the flow of fuel from the supply reservoir 29 to the burner may be controlled by the valve 26. A red 3| extends longitudinally of the pipe 23 and is provided with a crank 32 at its outer end for connection with the operating rod 33. This rod 33 extends through the casing or support 23. By reciprocating the rod 33, the flattened scraper blade 33 will be rotated within the inner end of the fuel pipe 23 to scrape or break loose any hard carbon which might form in the discharge end of the fuel pipe 23..

An air heating element 33, preferably circular in formation rests upon the ledge portion II and is provided with a plurality of upwardly extending spaced fins 31 arranged annularly around the upper face of the element 30, as shown in Figme 3. These fins 31 are-spaced or inset inwardly of the air. inlet apertures 24, as shown in Figure 2, so that air may pass upwardly of the housing it, through'the apertures, or air inlets 24. and between the fins 31. This element 34 is provided with an inwardly extendingupturned annular ring slupporting flange 38, upon which the lower edge of a ring 39 rests. This ring 33 is inset relative to the fins 31 to permit heated air to pass between the ring 39 and the fins 31' and through the perforations of the ring 39. A fiat ring 43 rests upon the top of the fins 31 and encircles the perforated vertical ring 33 in spaced relation thereto. I A cap plate 4| fits over the upper edge of the ring 39 and carries a depending flange 42 which fits within the ring 39. This plate 4| is preferably anchored in position upon the support l4 in overhang-ing relation by suitable screws, in any desired manner. A removable inset ring 43 having anannular depending flange fits within the flange 42 of the plate 4| to space the ring 43 from the wall 44 of the plate 4| and provide a channel 45 therebetween. This ring 43 is provided with an overhanging lateral flange 48, overhangs the plate 4! and extends flush therewith to removably support the ring 43 upon the plate. The ring 43 is provided withslots 41 to provide outlets for the channel 45.

A door 48 is hinged to the flre pot l0 over the opening 43 opposite the fuel pipe 23. A spring pressed choker rod- 50 engages the door 43 to cause the door 43 to automatically close when released. The rod 50 extends through the housing it and carries an actuating knob II at its outer end. A spring 52 is carried by the'rod Ill between the door 48 and the inner face of the housing It to hold the door 48 normally closed.

In assembling the burner the fire pot .lli is fitted in position, the flange l3 hanging upon the I burner support l4. The fuel pipe 23 is placed in position and the door operating mechanism for 55 the door 48 is placed in position. The air heating element 84 is placed in position to fit upon the ledge portion 19 and the rin s 39 and 40 are placed upon the-element 33. The cap 4| is then placed in position over the ring 39 and anchored in position. The removable inset ring 43 is then dropped in place upon the cap plate 4l.- This ring 43 is removable for cleaning the burner from the top.

when assembled, the burner may be lighted after permitting a proper amount of fuel to flow into the dished bottom of the fire pot l0. The

door 48 is opened by pulling outwardly upon the rod 50 and a lighted paper is dropped through the openin 48 into the dished bottom of the fire pot l upon the fuel. When the rod 50 is released, the door 48 will automatically close and remain closed until again manually opened. The door assembly acts as a choker. When the door 48 is opened, this lets a volume of excess air into the burner, holding the flame in the burner down near the bottom thereof. This will heat the metal of the fire pot I0 which in turn speeds up the vaporization of the fuel, thereby producing a quick fire. This operation only takes a few sec-' onds and when the choker rod 50 is released, as stated above, the door 48 closes automatically by action of the compression spring 52,

It will be noted that the ring 40 rests on the air heating element 36 in the manner shown and directs air passing through the apertures or air inlet openings 24 and between the fins 31. Since these fins 31 are very hot, when the burner is in operation, the air passing therebetween will be heated to a very high degree of temperature, before it enters the perforated ring 39 and openlugs 41 and the openings 41' in the bottom of the cap plate 4|. This arrangement will cause the hot air to come into the burner near the top thereof, where the hot air is most valuable and useful in perfecting combustion. The element 36 also tends to hold the temperature down in the fuel chamber 20, since it absorbs heat from the burner fire pot Ill. The draft on the heating unit in which the burner is installed, is drawn through the openings 24 and between the fins 31, tending to cool the fins and consequently take heat from the metal of the burner fire pot I0.

Furthermore, it should be understood that as the draft is drawn through the openings 24, from outside the burner and is turned upwardly and between the fins 31, jets of air are forced through the various perforations thereby mixing with the gas vapors that form in the burner. The air heating element 36 which carries the fins 37 naturally becomes heated while at the same time, because of its construction, it tends to draw heat away from the metal parts of the surrounding casing. The heated air will pass upwardly through the ports or openings 41 and 41 as above described and also through the perforated ring 39. Since this air is very hot, and is discharged near the top of the burner, a complete combustion is obtained.

4 It should be understood that certain detail changes in the structure may be made without ference of the upper chamber of said flrepot, a

circular air heating element seated on said inset ledge and provided with a plurality of upstanding spaced fins arranged annularly about and inwardly of the circumference thereof, said fins being disposed inwardly of and opposite said firepot air inlet openings, a cylindrical perforated ring seated concentrically within said fins on said heating element, a flat ring seated on said fins in abutment between the chamber wall and the perforated ring member, a circular cap seated about the open top of said firepot, a depending flange formed about the inner circumference of said circular cap and seating telescopically with the upper end of said perforated ring acting to center the same, a circular ring having a depending flange seated on said cap with said flange in an inserted position within said cap, and tne last mentioned ring having circumferentially spaced vent slots formed therein.

CECIL E. YOUNG.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 1,897,314 Little' Feb. 14, 1933 1,975,192 Chadwick et al. Oct. 2, 1934 1,997,347 Schroeder et a1 Apr. 9, 1935 2,068,441 Valjean Jan. 19, 1937 2,072,048 Leonard Feb. 23, 1937 2,109,946 Little Mar. 1, 1938 2,214,664 Donley Sept. 10, 1940 2,214,693 Grotencuis Sept. 10, 1940 2,261,814 Suchland Nov. 4, 1941 2,272,423 Moore Feb. 10, 1942 2,287,361 Suchland June 23, 1942 2,290,544 DeLancey July 21, 1942 2,344,758 Welsh Mar. 21, 1944 2,369,833 Livar Feb. 20, 1945 2,401,086 Little May 28, 1946 2,404,039 Castle July 16, 1946 FOREIGN PATENTS Number Country Date 767,865 France May 7, 1934

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