US1342732A - Fuel-oil burner - Google Patents

Description

A. R. ANTHONY. FUEL OIL BURNER. APPLICATION FILED 050.30, I9l8.

2 SHEETSSHEET l.

Patented June 8, 1920.

%@X?&LLAQ M M A. R. ANTHON Y.

FUEL OILBURNER.

I APPLICATION FILED DEC. 30, 19H?- 1,342 ,7 32. Patented June 8, 1920.

2 SHEETS-SHEET 2- UNITED STATES ALFRED R. ANTHONY, OF DETROIT, MICHIGAN.

FUEL-OIL BURNER.

Specification of Letters I atent.

Patented June 8, 1920.

Application filed December 30, 1918. Serial No. 268,885.

To all whom it may concern:

Be it known that I, ALFRED R. ANTHoivY, a citizen of the United States, and residing at Detroit, Wayne county, State of Mlchlgan, have invented certain new and useful Improvements in Fuel-Oil Burners, of which the following is a specification.-

The present invention relates to liquid fuel burners and more particularly to improvements in the mixing and atomizing devlces thereof.

The objects and features ofnovelty of the invention will be apparent from the description taken in connection with the drawings, in which Figure 1 is a longitudinal sectional View through a burner having mixing devices constructed in accordance with the present 1nvention;

Fig. 2 is a sectional'elevation taken substantially on the line 2-2 of Fig. 1; and

Fig. 3 is a longitudinal sectional vlew of the oil tube of the burner equipped with a modified form of cap.

Referring to the drawings, the numeral 10 indicates the hollow burner body having its opposite ends open and formed -with an air inlet 11. A fuel tube 12 is provided with an enlargement 13 at one end thereof and this enlargement is threaded into the opening at one end of the body, as at 14, to close said opening. An air tube 15 1s dlsposed around the fuel tube 12 being threaded on the enlargement 13 as at 15. The alr tube 15 being spaced from the fuel tube 12 forms an air passage 16, the tube 15 having apertures 17 through its wall so that air supplied through the opening 11 may pass into the passage 16. The tube 15 is spaced from the walls of the burner body thereby providing a second air passage 18. Liquid fuel may be sup lied to the' interior passage 19 of the fuel tu e through the valve 20 connectedby means of a nipple 21 to the enlarged end of the fuel tube.

The discharge end of the fuel tube is closed by a conical wall 20 and the end portion of the tube adjacent said wall has itsdiameter reduced and is formed with a plurality of apertures 21 whichare disposed in a plane transverse to the axis of the tube and are inclined to the radial. A cap 22 is threaded as at 23 on a reduced portion of .the fuel tube 12 and has a conical end 24, spaced from the conical end of the fuel tube, thus form ing a fuel discharge chamber 25. In a like manner a cap 26 is threaded on the end of the air tube 15 and has a conical end 27 spaced from the end 24 of the inner cap thereby forming an annular passage 28. The inner cap 22 has its end formed with a central aperture 29 and the cap 26 also has a central aperture '30 but of larger diameter than the aperture 29. It will be seen that because of the construction of the end of the fuel tube, the fuel issuing into the chamber 26 has a whirling motion,\and because of the conical surfaces surrounding the chamber 25 the fuel will issue through the aperture 29 in the form of a conical jet having a whirling motion. A conical stream of air discharged from the passage 28 will intersect this conical fuel jet thereby atomizing the .fuel. A third cap 31 is screwed on the outside of the burner body and has the conical end 32 spaced from the end 27 thereby forming the conical passage 33 from which a second conical stream of air is discharged to intersect the jet issuing from the opening 30 of the middle cap.

In order to effect further atomizing and mixing of the fuel and air, the air issuing from one of thea-ir passages may be given a whirling motion, preferably in a direction opposite to that of the fuel jet, For this purpose the inner cap 22 has blades 34 which are curved in a circumferential. direction but are straight in the direction of the axis of the burner. Thus the air in flowing along the passage 16 is discharged from the same into the passage 28 with a whirling motion in a direction transverse to the axis of the burner. C Because of the simplicity of this burner, it may be manufactured at a low cost, and yet the arrangement and construction is such that a very thorough mixture of fuel and air and atomizing of the fuel are obtained.

In Fig. 3 of the drawings a form of the invention is illustrated in which the fuel tube 12 is provided with a cap 22 which has no means for giving the air a whirling motion. Thus the cap is provided with the conical end 24 and is threaded on the tube as at 23'. The end of the fuel tube has the conical wall 20 and is formed with the reduced portion having apertures 21 disposed, as described heretofore. The end of the cap 22 is formed with the centrally arranged discharge opening 29 which constitutes the thoroughly v fuel tube closed at its discharge end and also having a portion at said end reduced in diameter, a cap on said end havlng a discharge opening co-axial with the tube,ifthe space between the reduced end and cap forming a chamber, the tube wall at the reduced end having apertures inclined transversely to the radial whereby the fuel is discharged from the opening in the cap with a whirling motion.

2. A burner of the class described including in combination, a fuel tube having a conical closed discharge end and the exterior diameter at said end being reduced,

. .a cap carried by the tube having a conical end spaced from the conical end of the tube and its side wall being spaced from the reduced end portion of the tube, the cap end having a central discharge opening, said reduced end portion formed with apertures through itswall inclined to the radial whereby the fuel is given a whirling motion, and

7 means to direct a conical stream of air to intersect the j etissuing from the opening in said cap.

3. A burner of the class described including in combination, a fuel tube having a. conical closed discharge end and the exterior diameter at said end being reduced, a cap carried by the tube having a conical end spaced from the conical end of the tube and its side wall being spaced from the reduced and means to effect a whirlin end portion of the tube, the cap end having a central discharge opening, said reduced end portion formed with apertures throu h its wall inclined to the radial whereby t e fuel is given a whirling motion, means to direct a conical stream of air to intersect the jet issuing from the opening in said cap,

motion of the stream of air in the opposite irection to that of the jet.

' 4. A burner of the class described including in combination, a fuel tube having a conical closed discharge end ,and the exterior diameter at said end being reduced, a

cap carried by the tube having a conical end spaced from the conical end of the tube and its side wall being spaced from the reduced end portion of the tube, the cap end having a central discharge opening, said reduced end portion formed with apertures through its wall inclined to the radial whereby the fuel is given a whirling motion, means to direct a conical stream of air-to intersect the jet issuing from the opening in said cap,

and means on said cap to effect a whirling motion of the stream of air in the opposite direction to that of the jet.

5. A burner of the class described including in combination, a burner body having a fuel tube with a closed conical end, an air tube surrounding the fuel tube, a cap on the end of the fuel tube having a conlcal end spaced from the end of the fuel" tube thereby forming a chamber, the walls of the fuel tube at said end being reduced in diameter and formed with apertures inclined to the radial, a cap on the air tube having a conical end spaced from the fuel cap end, said cap ends each having a discharge openin coaxial with the fuel tube, and means to e fect a whirling motion of the air discharged from the air tube. I

In testimony whereof I aflix my signature.

ALFRED R. ANTHONY.

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