US2525350A

US2525350A - Gas burner with crimped ribbon port structure

Info

Publication number: US2525350A
Application number: US727925A
Authority: US
Inventors: Frank E Hanson
Original assignee: Servel Inc
Current assignee: Servel Inc
Priority date: 1947-02-11
Filing date: 1947-02-11
Publication date: 1950-10-10
Anticipated expiration: 1967-10-10

Description

Oct. 10, 1950 F. E. HANsoN GAS BURNER WITH CRIMPED RIBBON PORT STRUCTURE Filed Feb. 11, 1947 INVENTOR. BY M www Patented Oct. 10, 1950 GAS BURNER WITH RIBBON PORT STRUCTURE Frank E. Hanson, Evansville, Ind., assignor to Servei, Inc., New York, N. Y., a corporation of Delaware Application February 11, 1947, Serial No. 727.925

My invention relates to gas burners and more particularly to an improvement in ribbon type burners.

The object of my invention is to provide a burner formed by a plurality of crimped ribbons arranged in side by .side relationship to provide interstices therebetween and in which the use of parts in addition to the crimped ribbons to prevent the meshing and buckling of ribbons is avoided.

I achieve the above and other objects and advantages of my invention by forming the adjacent crimped ribbons with a diderent number of crimps per unit of length as explained in the following description of my invention when taken in conjunction with the accompanying drawings in which:

Fig. 1 is a top plan view of a burner head incorporating my invention;

Fig. 2 is a side elevational view, partly in section, of the burner illustrated in Fig. 1;

Fig. 3 is a part sectional view taken generally on line 3--3 of Fig. 1; and

Fig. 4 is an enlarged plan view of a portion of the burner shown in Fig. 1.

In the embodiment of the invention illustrated in the drawings, the gas burner comprises a generally H-shaped burner head I provided with a depending collar II, see Fig. 2, which snugly fits over an upstanding tapered neck I2 formed on a conventional mixing tube Il, whereby the burner head is removably supported on the mixing tube. Burner head I0, preferably formed as a hollow casting, has two longitudinal branches Il connected by an integral bridge I l. The bridge I5 is formed by two side walls lia and a top wall IIb which form a transverse passage I6. Each of the branches I4 provide a longitudinal passage II which communicates midway its length with the transverse passage I6. Transverse passage Il is in open communication with the upstanding neck I2 of the mixing tube I3, the arrangement being such that a combustible air-gas mixture passes upwardly through mixing tube I3 into the transverse passage I8 and from there into longitudinal passages I'I. The top face of each of the branches Il is flat with a longitudinal slot Il therein in open communication with the longitudinal passage I1. The slots I8 are preferably formed by a machining operation to cut the top and end walls of the branches Il.

In order to properly distribute the air-gas mixture throughout the length and breath oi' the slots I8 and to prevent the flame of the burning air-gas mixture at the top oi the burner 6 Claims. (Cl. 158-116) head I l from ilashing back through the mixing tube I3. a plurality of crimped stripsor ribbons IO are provided in each of the slots Il. The number of ribbons Il placed in the longitudinal slots I8 will vary in accordance with the width of the slot and the ribbons are supported at their ends by the transverse end walls 2l of branches Il and at their middle by a bridge member 2i. The ribbons Il may be welded or otherwise secured at their endand mid-portions. or they may be arranged to oat lengthwise in the slots. However. because of their .hereinafter described construction, all of the ribbons I. are free to expand and contract without extension or buckling and it is therefore preferable to secure the ribbons in the slots Il.

Each of the ribbons Il consists of a thin strip of a suitable heat resistant material 'and of appreciable height, corresponding to the depth of the slots Il. The ribbons I! are crimped or corrugated throughout their length to provide alternate crests 22 and 23 which project from opposite sides of the ribbons.

In accordance with my invention, and as most clearly shown in Fig. 4, the adjacent ribbons I. in each slot Il have a diiIerent number of corrugations per unit of length. As illustrated in the drawing only two sets of ribbons Il are provided but a greater number of sets may be used. One of the sets of ribbons II is indicated by numeral I9a and the other set of ribbons is indicated by numeral I9b. The ribbons in set Ila are coarsely crimped having a lesser number of crests per unit of length than the ribbons in set I9b which are iinely crimped. The crests in ribbons Ila are therefore larger than the crests in ribbons lsb. While the number of crimps per unit of length in the two sets of ribbons Ila and lsb may have lnilnite variations. a burner for use with natural gas comprising alternate ribbons having 8 and 1l crimps per' inch, respectively, and a burner for use with manufactured gas comprising alternate ribbons having II and I8 crimps per inch, respectively, have been found to have good operating characteristics.

In assembling the ribbons I! in-the slot Il the ribbons Ita and Ilb are arranged alternately in side by side relationship in the slot. the ribbons Ila being separated from each other by a ribbon I9b and vice versa. In this manner each ribbon I9 has a ribbon immediately adiacent to it which possesses a greater or lesser number of crests of a different4 size per unit oi' length. At irregularly spaced points a crest I2 of a ribbon lia will abut against a crest il 0i assassin a ribbon l9b. In this manner the adjacent ribbons are held in spaced relationship. The spaces 24 betweenthe adjacent ribbons serve as gas ports for the burner. As the surfaces of the adjacent ribbons I9 differ in shape, the ribbons cannot mesh and therefore no parts, such as flat spacer strips heretofore used, are needed to prevent the meshing of the ribbons. As all the ribbons I9 in the burner are crimped, they can easily expand and contract upon heating and cooling without any extension in their overall length, and thus no constructional parts are needed to prevent buckling of the ribbons.

Various changes may be made within the scope of the invention. For example, the casing of the burner head may take other forms such as a cylinder and the opening for the ribbons may be circular or have any other suitable shape. Therefore without limiting myself in this respect, the invention is defined by the following claims.

What is claimed is:

l. A ribbon burner comprising a burner head having an opening therein, a plurality of crimped ribbons arranged in side by side relationship in the opening, each of said ribbons being crimped uniformly throughout its length, and the contiguous portions of adjacent ribbons having a diierent number of crimps per unit of length so selected that crests on adjacent ribbons abut at spaced intervals to hold the ribbons in spaced relationship.

2. A ribbon burner comprising a burner head having an opening therein, a. plurality of crimped ribbons arranged in side by side relationship in the opening, each of said ribbons being of continuously undulating form to provide uniform crimps throughout its length, and the adjacent ribbons having an odd and even number of crimps per unit of length, respectively.

3. A ribbon burner comprising a burner head having an opening therein, a plurality of crimped ribbons in the opening in the burner head, and the adjacent ribbons being of sinuous form fthroughout their length to provide alternate crests projecting from opposite sides and having a different number of crests per unit of length to contact each other at a plurality of spaced points throughout the area of the opening and thereby hold the ribbons in spaced relationship.

4. A ribbon burner comprising a 'burner head having an opening therein, a plurality of crimped ribbons arranged in side by side relationship in the opening in the burner head, each of said ribbons being continuously corrugated throughout its length to provide uniformly spaced crests projecting from opposite sides thereof andthe contiguous portion of adjacent ribbons having a different number of corrugations per unit of length so that certain of the crests of adjacent 'ribbons contact each other at spaced points throughout .the area of the opening.

5. A ribbon burner comprising a generally H- shaped burner head having spaced parallel branches connected by va transverse bridge, said parallel branches of the burner head having longitudinal slots therein, crimped ribbons arranged in side by side relationship in the slots in the burner head, each of said ribbons being continuously corrugated to provide uniformly spaced crests, and the adjacent ribbons in each of the slots having a different number of crests per unit of length.

6. A ribbon burner comprising a burner head having an opening in the top thereof, a plurality of sets of continuously undulating crimped ribbons to provide crests projecting from opposite sides of each ribbon, the ribbons of one set having a different number of crests per unit of length than the ribbons of the other set without a' common divisor, and said ribbons being arranged in side by side relationship in the opening in the burner head with the ribbons of one set alternating with the ribbons of the other set so that crests of adjacent ribbons abut each other at spaced points to hold the ribbons spaced from each other.

FRANK E. HANSON.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 1,789,226 Ensign Jan. 13, 1931 2,228,150 Norman Jan. '7, 1941 2,428,271 Ensign Sept. 30, 1947 2,435,391 Gunderman Feb. 3, 1948 2,443,101 Flynn et al. June 8, 1948