US2933132A

US2933132A - Gas fueled pilot burner

Info

Publication number: US2933132A
Application number: US378046A
Authority: US
Inventors: Roland D Beck
Original assignee: Honeywell Inc
Current assignee: Honeywell Inc
Priority date: 1953-09-02
Filing date: 1953-09-02
Publication date: 1960-04-19
Anticipated expiration: 1977-04-19

Description

April 19, 1960 R. D. BECK GAS FUELED PILOT BURNER Filed Sept. 2. 1953 .FIE. 5

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I I I I I I I I I I I I I I u I INVENTOR.

ROLAND D. BECK ATTUR/VE) United States Patfi i GAS FUELED PILOT BURNER Roland D. Beck, Inglewood, cane, assignor to Minneapolis-Honeywell Regulator Company, Minneapolis, Minn., a corporation of Delaware Application September 2, 1953, Serial No. 378,046 3 Claims. (Cl. 158-115) This invention relates to pilot burners. ularly, the invention relates to a sheet metal.

One object of the invention is to provide an inexpensive burner that is adapted to serve as a pilot burner for a main burner and/or to heat a thermocouple unit associated with a safety control for the gas being burned by the same burner and/or a main burner.

Another object of the invention is to provide a pilot burner tip which is of sturdy construction and that can be formed from sheet metal.

A further object of the invention is to provide a sheet metal burner tip that requires no costly forming operation and which provides a ribbon or fan like flame when burning gas.

Other objects of the invention will become apparent upon reading the following detailed description of the invention in conjunction with the accompanying drawing wherein:

Figures 1 and 2 are plan and side views, respectively, of a blank of sheet metal;

Figures 3 and 4 are plan and side views, respectively, of the metal blank of Figures 1 and 2 after the first step of the forming operation has taken place;

Figures 5 and 6 are plan and side views, respectively, of the same blank of the metal after the second and third steps of formation;

Figures 7 and 8 are plan and side views, respectively, with a portion of the metal broken away in the plan view and the side view in cross-section, after the fourth step of the formation; and

Figure 9 is a cross-sectional view of the burner, with a portion thereof broken away, after the fifth step of the operation of forming the burner.

The burner tip consists of a sheet of metal, 11, preferably of stainless steel, that had been cut to the shape illustrated in Figures 1 and 2. Preferably by a continuous operation, the sheet is first bent to the shape illustrated in Figures 3 and 4 to provide a burner tip having legs Ida and 11b, with a connecting portion 110 forming the More particpilot burner made from base of a generally U-shaped member. The U-shaped member is then further shaped by bending the legs 11a and 11b toward each other at each side edge thereof to bring them into abutting relationship, as shown in Figure 6, and, simultaneously, the portion 110 thereof drawn into the shape illustrated in Figure 5. It will thus be seen that due to the lengthening of the legs 11a and 11b gradually from each side edge of the legs to points substantially a quarter of the distance from the edges of the burner tip and lengthened a uniform distance between said points, a flattened, cup-shaped tip is formed with the leg 11a the top wall and the leg 11b the bottom wall. The tip has side walls which are integral for a substantial distance of its depth from the bottom thereof towards the open end thereof, with the remaining depth thereof having side walls which are formed of two portions that are in substantially gas tight abutting relationship, to

. provide a substantially gas tight burner slot opening to support a burner flame.

2,933,132 Patented Apr. 1 9, 160

tip having a single The burner tip has a hole or opening 12 therein that is formed in the tip after it has been formed into the shape shown in Figures 5 and 6. This formation may take .place either by punching the hole in the sheet material into a cavity in the drawing and bending die, while it is still in the burner tip at the end of a drawing operation, I or at some other time by conventional means.

It is deemed to be obvious to those skilled in the art that a machine, with conventional die means capable of making the burner tip illustrated'in Figures 7 and 8, maybe made that can by a single operation, cut the blank of the Figures 1 and 2 from a larger sheet of metal, continue in its movement to shape themetal as in Figures} and 4, and further continue its movement to a position which brings the tip to the shape shown in Figures 5 and 6, the convex ends of the blank being pulled by the die means drawing the portion and pressing against said ends. While the machine is in this last mentioned position, a punch could be brought in from the side of the die means to form the hole 12.

The burner is completed by brazing or otherwise securing a burner tube 13 to the burner tip at 14 with the 3 end of the tube projecting through the hole 12 and terminating near the middle of the tip. It will be noted that the width of the burner tip is over twice that of the tube 13. This provides a substantial passage in the tip on each side of the projecting tube which passages are unobstructed by the tube. At the same time, the width of the burner tip is not sufficiently wide with respect to the burner tube to prevent the obstructing effect of the tube from substantially reducing the relative amount of fuel issuing at the center of the opening. The result of this is that more fuel tends to issue at the ends than at the center of the tip opening so that the flame extends further at the sides than at its center. This is of advantage where. it is desired to heat a cylindrical object such as a thermocouple, since the flame tends to partially surround the object being heated. In this manner a very inexpensive burner is provided that is of strong construction and is easy to manufacture.

As slight changes may be made in the structure of the burner tip and in the method of producing it without departing from the spirit of the invention, it is to be understood that the scope of the invention is to be determined solely from the appended claims.

I claim as my invention:

1. A burner comprising a fuel supply tube and a burner tip secured thereto; said tip being in the form of a flat cup having flat top and bottom walls, side walls, a closed transversely curved end wall, and an opposite open end providing an elongated opening through which a flame can issue, and said fuel supply tube projecting through the bottom flat wall of said cup intermediate of and spaced from said side walls and said closed and open ends and partially into said cup so as to partially obstruct the passage of fuel in said cup towards said open end, said tube having the top thereof substantially parallel to said top wall so that the fuel issuing therefrom impinges the top Wall at an intermediate area thereof and is distributed throughout the width of the cup before issuing at said elongated open end, the width of said tip being sufficiently greater than that of said tube that a substantial passage unobstructed by said tube exists on each side of said tube to tend to cause more fuel to issue at the ends than at the center of said opening but not so much greater as to reduce the relatively greater issue of fuel at the ends of said opening.

2. A burner comprising a fuel supply tube and a burner tip secured thereto; said tip being in the form of a flat cup having flat top and bottom walls, transversely curved side walls, a closed transversely curved end wall, and an therefrom impinges the top wall at an intermediate area thereof and is distributed throughout the width 'of the cup before issuing at said elongated open end, the width of said tip being sufiicient-ly greater than that of said tube that a substantial passage unobstructed by said tube exists on each side of said tube to tend to cause more :fuel to issue at the ends than at the center of said opening but not so much greater as to reduce the relatively greater issue of fuel at the ends of said opening.

3,. A burner comprising a fuel supply tube and a burner tip secured thereto; said tipbeing formed of a flat sheet of metal bent over into a u shap'ed form and with the edges thereof drawn together into abutting relationship so as to form a flat cup having flat top and bottom walls, transversely curved end and side walls formed by the bending and drawing of said sheet, and an opposite open end providing an elongated opening through which a flame can issue; and said fuel supply tube projecting through the bottom flat wall of said cup intermediate of and spaced from said side walls and said closed and open ends and partially into said cup so as to partially obstruct the passage of fuel in said cup towards said open end, said tube having the top thereof substantially parallel to said top wall so that the fuel issuing therefrom impinges the top wall at an intermediate area thereof and is distributed throughout the width of the cup before issuing at said elongated open end, the width of said tip being suffieiently greater than that of said tube that a substantial passage unobstruct'edby, said tube exists on each side of said tube to tend to cause more fuel to issue at the ends than at the center of said opening but not so much greater as to reduce the relatively greater issue of fuel at the end of said opening.

References Cited the file of this patent UNITED STATES PATENTS 332,871 Brainard a Dec. 22, 1885 1,183,478 Mathias et, al. May 16, 1916 1,285,665 Franklin Nov. 26, 1918 1,508,566 Moffat Sept. 16, 1 924 1,753,141 Wyatt Apr. 1, 1930 1,874,691 Bartlebaugh Aug. 30, 1932 1,899,626 Miller Feb; 28, 1933 2,239,368 Lyon Apr. 22, 1941 FOREIGN PATENTS 564,988 France Nov. 2, 1923