US2450680A - Gas burner - Google Patents

Description

Oct. 5, 1948. E. H. MUELLER I I 2,450,630

' ens BURNER Filed July 10, 1944 2- Sheets-Sheet 1 INVENTOR. Err/n h. Muel/er E. H. MUELLER GAS BURNER Oct. 5, 1948.

Filed July 10, 1944 2 Shuts-Sheet 2 Patented Oct. 5, 1948 T- OFFICE GAS BURNER Ervln n. Mueller, Grouse route, Mich. Application July 10. 1944, Serial No. 544,214

it claim (01. 158-118) This invention relates to burner structures for gas stoves or ranges. The invention has to do particularly with a burner structure which embodies a set of burner ports located more or less centrally in the burner body .and another set of burner ports extending around the first set of burner ports so that there is an inner flame and an outer flame.

Burners have been heretofore proposed which have an inner flame, quite frequently referred to as a simmering flame, and an outer flame-intended to be used where more intense cooking or heating is desired. These burners were of a double construction in that the inner section and the outer section had independent fuel inlets and mixer tubes. Accordingly, the inner section of the burner could be used independently of the outer section for simmering purposes; both the inner and outer sections were used for the more intense heating.

It is not always desirable. however. to have all of the burners of a stove or rangeof this double construction. have one or more of the burners of double construction and one or more of a single burner type. However, it is desirable to maintain the uniform characteristics of the burners so that they will all look alike and present a desirable appearance.

Accordingly, this invention provides a burner structure which may be considered to be interchangeable while maintaining the same appearance. To this end a burner structure is provided wherein both the so-called double burners and the single burners have the same outer appearance but wherein the single burner, while having the inner and outer burner flames, has but a single mixer tube and fuel control. This arrangement of burners raises another problem,'namely. that of ignition. Accordingly, an arrangement is provided wherein the ignition system in the single burner has the same general characteristics as the ignition system for the double burners so that the burners may be inter-changed without necessitating any change in the ignition system. Also, many of the parts are interchangeable.

The invention also aims to provide a simplified but efllcient burner structure so that parts of the burner may be easily assembled or separated for cleaning purposes and the like, and in some forms the burners may be taken apart and reassembled without the use of special tools and instruments so that they can be very easily kept in a clean condition. Other objects of the invention will become apparent as the following detailed descripusually 1' tion is considered in connection with the accompanying drawing:

Fig. 1 is a plan view of a double burner structure.

,Fig. 2 is a side elevational view of a burner which may be either singleor double with parts cut away illustrating the air control valve.

It may at times be desirable to Fig. 3 is a sectional view taken substantially on line 8-3 of Fig. 1 showing the ignition arransement.

Fig. 4 is a detailed plan view of a spider member embodied; in the. burner assembly structure.

Fig. 5 is a side elevational view of the spider shown in Fig. 4,

Fig. 6 is a plan view of another form of burner structure.

Fig. 7 is a sectional view line 1-1 of Fig. 6.

Fig. 8 is a sectional view similar to Fig. 7 showing a still further modified form of burner structure. -i 1 Fig. 91s a sectional view similar to Fig. 3 but showing'the single burner structure.

The burner structureshown in Figs. 1 to 5. is of the double construction. It has a body I! which may be of cast construction formed integral with which is a mixer tube formation l8 divided into two separate mixer tube sections I 8 and 20 by a partition 2|. an opening for the reception of the valve outlet Jet 22, and an opening 23 positioned preferably in the top portion of the mixer tubes for the admission of primary air. The openings 23 are preferably located in a portion of the mixer tubes which have a flat or plane regulated by a shiftable valve member 25. This valve member is in the form of a plate with an elongated slot 26 for the reception of a holding screw 21. The body is formed with a rib 28, and one end of the plate2'l is turned downwardly and slotted as at 29 for sliding actionalong the rib to thus keep the plate from turning on thescrew.

It will be appreciated how the openings 23 may be regulated for the entrance of the proper amount of air forcombustion purposes by loosentaken substantially on Each mixer tube is provided with surface 24 andthey can be the opening extends across assaceo The mixer tube l9 leads to a chamber 32 for the outer burner whereas the mixer tube 20 leads to a chamber 33 for the inner burner. The burner structure is completed by a cap or top structure applied to the top of the body H. The outer burner cap 34 has a plurality of slots formed therein and circumferentially arranged, as shown at 35, and the partitions defining the slots seat upon the flat-top surface of the burner body, as shown at 35, so as to form ports defined by the slots 35. The inner burner cap 31 is also provided with a plurality of slots forming ports as at 38.

One manner of assembling the top pieces 34 and 31 to the burner body is shown in Figs. 3, 4, and 5. In this form there: is a spider having a ring'part 40 which seats upon the top of the body extending around the chamber 33, and the spider is provided with ports 41 for the passage of gas therethrough-and legs 42 which extend outwardly and rest upon a flange 43 of the outer cap. A screw threaded stud 45 is attached to the inner cap 31 and this stud may loosely hold the spider in position by means of a shoulder 46. The stud may be die cast directly in the cap 31 or otherwise secured thereto to form a subassembly of the cap, spider and stud. After placing the outer cap 34 in position, the cap 31 is rotated and the stud is screw threaded into the body as at 41. This clamps the spider against the burner body and the legs 42 hold the outer cap to the body. Thus the complete assembly 1s provided by this one operation and no special tools or istruments are necessary to take the top parts oil for cleaning or the like.

The burners of this double construction may be ignited in accordance with the disclosures in Ervin H. Mueller Patent No. 2,215,711 of September 24, 1940. Briefly, however, the ignition system is as follows: A flash tube i6 is positioned adjacent the burner as shown in Fig. 3, and the mixer tube 20 has a chamber 50 which extends to the outer regions of the-burner and is provided with a port and one or more ports 52. When gas is supplied, and it may be supplied only to the extent of supplying gas to the simmer burner, a stream of gas passes through port 5! and into and through the tube 16 so that it is ignited by a pilot flame (not shown) at the remote end of the flash tube. There is a flash-back and the gas issuing from 51 becomes ignited. This flame propagates upwardly and ignites gas issuing from the port 52. The cap piece 34 is provided with a guide passage 53 and gas issuing from one or more of the ports 38 0f the inner burner section enters the guide passage and becomes ignited by the flame issuing from port 52. This ignition flashes back and ignites the gas issuing from ports 38. When gas is supplied so as to issue from the outer burner through ports 35, the gas issuing adjacent port or the ports 52 become ignited and then the flame chains around the outer burner so that gas is ignited throughout the circumferential extent.

It will be noted that the inner section alone may be used by merely supplying gas to the inner burner; and the inner burner ignites, as above pointed out. Any time the outer burner is in use the inner burner is likewise in use, since this is necessary for the maintenance of a flame at the port 52, which becomes a pilot flame for directly igniting the gas issuing from ports 3-5.

The single burner structure has but a single mixer tube 55 which leads both to the outer chamber 32a and the inner chamber 33a. As shown in Fig. 9, the cap construction for the single burner embodies the same structure as that shown in Fig. 3, and parts which are the same as those in the double burner have the same reference characters applied thereto. Indeed, the single burner structure has the same igniting arrangement which embodies the port 5i and the one or more ports 52. Whenever the single burner is to be used, the controlling valve is opened and gas enters themixer tube and flows to both the inner and outer burner 32a and 33a. Gas issuing from port 5| becomes ignited, which in turn ignites gas issuing from ports 52. The flame at ports 52 may at once ignite the gas issuing from the outer ports 35. The gas issuing from one or more of the ports 38 flows into the guide passage. 53, becomes ignited by the flame at 52, and there is a flash-back to ignite gas issuing from ports 38.

The modified form shown in Figs. 6 and 7 has parts which are the same as those briefly described, and which bear the same reference characters. Here, however, instead of providing a separate spider, such as is shown in Fig. 4, inwardly extending parts 5| are formed integrally with the cap 34 and they have a central ring-like portion 62 which fits over the inner part of the burner body. Therefore, when the cap 31 is assembled through the means of the stud 58, it seatsupon the ring 62 and holds the outer cap in position.

In the modified form shown in Fig. 8, a central spider 65 is used but it is a separate piece with the outer tips of its legs cast or formed directly in the metal constituting the outer cap 34. The outer cap may be a die casting and the spider 65, which may otherwise be similar to that in Fig. 4, is die cast directly in the metal. Accordingly, when the inner cap 31 is positioned by the stud 58, it seats upon the spider and holds the outer cap in position.

It will be observed that in all these forms secondary air may pass between the inner and outer burners in the space 63. The legs 42 of the spider shown in Fig. 1 and the parts 61 and 65, as shown in Figs. 7 and 8, offer no substantial obstruction. Of course, in all forms there is the gas chamber leading from the mixer tube 20 to the inner burner, but this offers no particular interference to the secondary air. The legs of any spider structure should preferably not be positioned adjacent the guide passage 53 but should be suitably spaced therefrom as shown in Figs. 1 and 6.

I claim:

1. A gas burner comprising a body having a fuel supply chamber for an inner burner section and a fuel supply chamber for an outer burner section which extends circumferentially around the inner burner chamber with a space th'erebetween, an outer cap in the form of a ring disposed over the outer burner chamber, an inner cap disposed over the inner chamber, the caps and the burnerbody having contacting surfaces some of which are grooved to provide burner ports leading from the respective fuel chambers, means for securing the inner cap to the body and means underlying the inner cap and having spaced elements extending across the space between the inner and outer burner sections and connecting with the outer cap for holding the outer cap on the body.

2. A gas burner comprising a body having a fuel supply chamber for an inner burner section and a fuel supply chamber for an outer burner section which extends circumferentially around theinner burner chamber with a space therebetween, an outer cap in the form of a ring disposed over the outer burner chamber, an inner cap disposed over thesinner chamber, the caps and the burner body having contacting surfaces some of which are grooved to provide burner ports leading from the respective fuel chambers, means for securing the inner cap on the body, a spider-like structure underlying the inner cap and having outwardly extending arms overlying a portion of the outer cap body.

3. A gas burner comprising a body having a for holding the outer cap on the fuel supply chamber for an inner burner section,

leading from the respective fuel chambers, means detachably connecting'the inner cap to the body,

and inwardly extending spaced elements on the outer cap projecting across the space between the inner and outer burner sections and underlying the inner cap for holding the outer cap on the body.

4. A gasbumer comprising a body having a fuel supply chamber for an inner burner section and a fuel supply chamber for an outer burner formation for overlying the outer fuel supply chamber, an inner cap foroverlying the inner fuel supply chamber, the caps and the burner body having contacting surfaces some of which are grooved to provide burner ports leading from the respective fuel chambers, means forconnecting the inner-cap to the body and means having arms extending across the space between the fuel supply chambers and connected to the outer burner cap and arranged to underlie the inner burner cap to hold the outer burner cap on the body.

6. For a gas burner having a body with an inner fuel supply chamber and an outer fuel supply chamber extending circumferentially around the inner fuel supply chamber with a space therebetween, an outer cap member of ring formation for overlying the outer fuel supply chamber, an inner cap for overlying the inner fuel supply chamber, the cap and the burner body having contacting surfaces some of which are grooved to provide burner ports leading from the respective fuel chamber, a stud connected to the inner cap and arranged to be detachably fastened section which extends circumferentially around the inner burner chamber with a space therebetween, an outer cap'in the form of a ring disposed over the outer burner chamber, an inner cap disposed over the inner chamber, the caps and the burner body having contacting surfaces some of which are grooved to provide burner ports leading from the respective .fuel chambers, means for detachably holding the inner cap on the body. a spider-like structure having a portion l to the body, a spider-like member assembled on the stud so that the inner cap, stud and spiderlike member are in sub-assembly with each other,

the spider-like member arranged to underlie the inner cap and having arms extending outwardly for engagement with the outer cap to hold the outer cap on the body.

ERVIN H. MUELLER.

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

UNITED STATES PIATENTS Number Name Date 449,776 Grinberg Apr. 7, 1891 1,329,649 Brombacher Feb. 8, 1920 1,928,898 Pickup Aug. 22. 1988 1,968,208 Harper July 81, 1984 2,048,280 Guhl July 21, 1986 FOREIGN PATENTS Number Country Date 818,848 Germany May 25, 1988

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