US2469136A - Gun type burner - Google Patents

Description

May 3, 1949. s o 2,469,136

GUN TYPE BURNER v 3 Shee'rls-Sheet 1 Filed Nov. 18, 1944 JoH/v- 7757mm May 3, 1949.

Filed NOV. 18, 1944:

J. T. STONE GUN TYPE BURNER 5 ShetsSheet 2 JOHN T 5 7021/ W/ZF Qwuamio'b May 3, 1949.

Filed Nov. 18, ,1944' J. T. STONE GUN TYPE BURNER 3 Sheets-Sheet s 2 1 3/ 2 "5,3435. I9 -4 A 2 i 7) 3 12 Toy/v7. 5 TO/VE.

Patented May 3, 1949 UNITED STATES FATENT OFFICE GUN TYPE BURNER John T. Stone, Baltimore, Md. Application November 18, 1944, Serial No. 564,150

3 Claims.

This invention refers to liquid fuel burners and more particularly to those of the gun type not requiring a blower or other mechanical device to propel the incoming air through the burner proper. It has among its objects to provide a burner having an adjustable gun and efficient arrangement for adjustably intermixing incoming air in a primary and secondary manner with the fuel as it burns therein.

A further object is to have the structure involved, relatively simple in form and economical to manufacture.

Other objects will become apparent as the invention is more fully set forth.

This invention provides a construction that 10- cates a guiding plate above the liquid fuel pan to direct the incoming air to the burning fuel through a tapering funnel and heating chamber to an adjustable swivel gun supplied with secondary air intermittently mixed therein and heated from the walls of the chamber.

In the drawings which illustrate an embodiment of this invention:

Figure l is a plan view of gun type burner illustrating an embodiment of this invention,

Figure 2 is a side elevation of Figure 1,

Figure 3 is a front elevation of Figure 1,

Figure 4 is a sectional view taken along line 4-4 of Figure 1,

Figure 5 is a sectional view 55 of Figure 4, and

Figure 6' is a sectional view taken along line 6-6 of Figure 4.

Similar reference characters refer to similar parts throughout the drawings.

In the device illustrated, l is a casing in which the burner 2 is positioned and is of customary conventional form. The casing supports the burner and is formed to allow air connections at its exterior, to be provided so the burner will be properly supplied for combustion. The burner body 2 is formed with a dished portion or circular liquid fuel pan 3 to which oil 4 is conducted to the bottom through a pipe 5. The inside surface of the fuel pan is curved on a general circular are depressed downwardly to allow oil fuel to be held therein as indicated. The entrance portion 5 of the burner is of bell-like form having a downwardly closing hinged door I in front, adjustably arranged with a suitable control mechanism 8. A curved'air pilot passage 9 leading from the exterior of the burner conducts air to the rim III of the fuel pan. A curved cap section H above the rim serves to direct this infiowing air across the face of the fuel in the pan.

taken along line central vertical axis of the pan is displate 12 suspended from It faces the fuel below to guide the air down Above the posed a curved guide the top of the burner. convexedly in a manner into the pan and towards the gun tube l3 on the opposite side. The gun tube has cylindrical and concentric inner wall 15 and outer wall 15' and is perforated peripherally with angular oriflees 14 along its inside Wall l5 which separates an air jacket Hi from the inside passage I! through which the burning fuel flows to the mouth It of the gun tube. The gun tube has its inner end portion l9 formed in a ball-joint manner so it can be moved to various positions angularly with respect to the normal horizontal axis of the gun body. It also forms a heating chamber for the secondary air. This ball-joint portion 19 fits over a corresponding ball sleeve 20 to enable the gun tube to be swivelled around. The member 19 has an air jacket 2! connected with that in the gun tube proper and is supplied with air from openings 22 leading from a peripheral air jacket 23 in the ball sleeve 20-. A ring-like air feeding chamber 25 within a ring tube 25' is attached to the inner end portion of the gun tube unit. A "tapering passage 25 leads through it and registers with the passage H which is about the same diameter throughout as the smallest diameter of the passage 26. The wall of the passage 2.6 leads to the vicinity of the plate l2 so as to convey the combustible mixture therefrom to the tube passage H. The air is supplied to the sec-- ondary air supply ring chamber 24 through ducts 21 leading from the exterior of the casing I. They are supplied with controls 28 that measure the amount of air to the mixture passing in the gun passage ll. After the flames leave the gun tube they pass into the furnace Within the casing I and perform the heating function for which it is provided.

The action of the combustion within the burner is as follows, first the pilot formed where the passage 9 and rim l0 meet is lit by igniting a small amount of oil in the fuel pan, the narrow passage 9 supplying sufficient air for the purpose of keeping the pilot burning at a low point. More fuel is let in through the pipe 5 and raises the level of the oil in the pan 3 and thereby increases the combustion that takes place. The primary air flow is then increased through the entrance portion 6 and passes by the deflector 29 and cap section H under the convexed plate l2 over the burning fuel to the tapered orifice 26 where it heats the walls of the ball joint and the air within the air jackets surrounding it, as it comes in through the ducts 21. The heated air mixes with the gases coming through the pressure passage I! as it is drawn through the orifices 14 at an angle and combines with the portions of the gases that are unburned. The resulting combustion is complete and passes into the furnace to the chimney or other outlet therefrom. The movement of the gun tube can be made without interfering with this action and enables any number of positions to be attained without objectional mechanical difiiculties. The large amount of material in the walls of the sleeve tends to accumulate heat therein for heating the secondary air passing therethrough and the gases passing from the fuel pan so sudden fluctuations in heating or cooling of the secondary air and fuel pan gases will be avoided. Whil blowers could be used with this device, such are usually unnecessary, as natural draft alone in this design of heater provides all the draft needed for it.

The convexed plate 12 is attached to an irregular shaped rod 30 and connecting rod SI and adjusted up and down by cam 32 when the shaft 33 and handle 34 are moved.

The circular liquid fuel pan 3 is constructed in design and thickness of material so it can readily be heated and assist in the proper vaporization of the fuel oil.

While but one general form of the invention is shown in the drawings and described in the specification, it is not desired to limit this application for patent to this particular form or in any other way otherwise than limited by the scope thereof, as it is appreciated that other forms of construction could be made that would use the same principles and come within the scope of the appended claims.

Having thus described the invention what is claimed is:

1. A burner of the class described comprising in combination a casing, a burner body mounted in said casing, said burner body having a tapered combustion chamber therein and a dished portion forming a fuel pan, means for supplying oil to said fuel pan, duct means for supplying primary air to said chamber, duct means for supplying secondary air to the burner, a gun tube pivotally attached to said burner body, said gun tube having concentric inner and outer cylindrical walls, the inner wall providing a channel for passage of the flames'from the burner body and the outer wall providing an outer chamber,

concentric with the channel and aligned with said secondary air duct means, and the inner wall having openings therethrough to provide passages for the secondary air in the outer chamber to enter the inner passage and mix with the flames passing therethrough to complete the combustion.

2. A burner as set forth in claim 1, a guide plate in said combustion chamber over said fuel pan and means for adjusting the position of the guide plate over said fuel pan to guide the incoming primary air downwardly and across the face of the burning oil in said fuel pan.

3. A burner as set forth in claim 1, said casing having an air passage therein, separate and independent from said primary and secondary air duct means, the air passage opening in proximity to said fuel pan and supplying air thereto when the primary and secondary duct means are closed, to maintain a pilot flame in said fuel pan.

JOHN T. STONE.

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

UNITED STATES PATENTS Number Name Date 516,363 Calkins Mar. 13, 1894 965,775 Weathers July 26, 1910 1,004,040 Laizure Sept. 26, 1911 1,031,104 Bellew July 2, 1912 1,175,796 Nelson Mar. 14, 1916 1,305,679 Yost June 3, 1919 1,314,740 Gadd Sept. 2, 1919 1,475,553 Piedallu Nov. 27, 1923 1,658,462 Peterson Feb. 7, 1928 1,660,106 Stroud Feb. 21, 1921 9 1,832,280 Coultas Nov. 17, 1831 2,069,960 La .Pointe Feb. 9, 1937 2,077,826 De Laval Apr. 20, 1937 2,130,329 Sammons Sept. 13, 1938 2,137,673 Knapp et a1 Nov. 22, 1938 2,198,485 1 Pirich Apr. 23, 1940 FOREIGN PATENTS Number Country Date 817,663 France May 31, 1937 354,359 Great Britain Aug. 6, 1931 396,571 Great Britain Aug. 10, 19.33 307,756 Italy May 13, 1933

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