US1909584A - Combined top and burner structure for fire pots - Google Patents

Description

May 16, 1933- J. IRONSIDE. ET AL 1,909,584

COMBINED TOP AND BURNER STRUCTURE FOR FIRE POTS Filed Dec. '7, 1927 2 Sheets-$heet l 11\ /'VENTOR. JAWiJ 120M105 ATTORNEY.

y 1933- J. IRONSIDE El AL 1,909,584

COMBINED TOP AND BURNER STRUCTURE FOR FIRE POTS Filed Dec. 7, 1927 2 Sheets-Sheet 2 M TTORA/EY.

Patented May 1%, 1933 TATES WT Fries JAMES IRONSIDE AND CLARENCE B. OVERLY, 013 DETROIT, MICHIGAN, ASSIGNORS, BY

IIIESNE ASSIGNMENTS, TO CLAYTON &: LAMBERT MANUFACTURING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF DELAWARE V COMBINED TO]? AND BURNER STRUCTURE FOR FIRE POTS Application filed December 7, 1327. Serial No. 238,264.

This invention relates to a combined top and burner structure for fire pots. It has to do particularly with a novel burner structure of extremely compact and efficient design in which the top of the fire pot is combined integrally with the burner structure.

Heretofore, in the manufacture of fire pots utilizing liquid fuel, generating tubes or coils of many different shapes and designs have been suggested and embodied in the fire pot structure for vaporizing the liquid fuel in order to make the same highly combustible and produce the blast or intense flame desired. One form of commercial fire pot which has been very successful, comprises a coiled generating tube, arranged centrally of the fire pot, and so positioned as to be heated partially or wholly by the burner blast. In such fire pots, and in fire pots in all other designs of which we are aware, it has been customary to provide separate burner structure and top structure, and in most all fire pots of this design the separately formed top structure is subjected to intense heat from the burner structure, re-

sulting in rapid burning out or deterioration of the top structure.

It is the object of the present invention to combine the top structure and burner structure in such manner as to form a compact efficient burner and top structure, the top structure being capable of carrying out all the functions heretofore assigned to top structure, and the top structure and burner structure being so designed and arranged that the flames from the burner has substantially no deteriorating effect on the top structure. More specifically, this invention contemplates the provision of an integrally formed burner and top structure; or even more specifically, the top structure preferably forms a part of the burner structure. This novel, compact structure and fire pot is preferably accomplished by arranging the generating tube beneath the burner structure and heating the same with an independent source of fuel supply other than that from the main burner. The burner structure is preferably annular in shape, with the top wall of the annular burner structure or passageway forming the top of the burner and fire pot, the fuel projecting portion of the burner being formed of an inner circumferential surface of the burner whereby to project the flames inwardly and upwardly.

As a result of this structure the entire fire pot structure is exceedingly compact and easy to assemble and relatively inexpensive to manufacture, the burner structure serving the combined purpose of a burner and a top structure, and performing both functions very efficiently. The generating of the fuel vapor is preferably accomplished independently of the main burner flame, and is thus readily accessible for starting, operating, and for cleaning and adjusting.

In the drawings:

Fig. 1 is a side elevation of the top part of a fire pot embodying the general features of our combined burner and top structure, and illustrating in particular the location of the generating tube and fuel conducting manifold relative to the burner and shield structure.

Fig. 2 is a plan View, taken on line 22 of Fig. 1, and showing the annular shape of the burner and a flame deflector positioned centrally thereof.

Fig. 3 is a fragmentary enlarged sectional View taken centrally through the burner structure and showing the preferred arrangement of the elements going to make up the burner top structure in combination with a modified form of shield.

Fig. 4 is a detailed view of the unitary central part of the burner structure consisting of the flame deflector, top supporting members and anular rings for holding the burner 3 is position.

The subject matter of this application is peculiarly adapted to the type of fire pot illustrated in Patents 1,853,309 of April 12 1932 and 1,879,938 of September 27, 1932 but it will be understood that our novel combined burner and top plate may be utilized in connection with fire pots having varying designs ofstarting and generating apparatus.

The fire pot which we have illustrated in Fig. 1 as embodying our invention is shown with a standard fuel reservoir, but it will be obvious that any type of fuel reservoir may be provided for preferably supporting the general fire pot structure 1a. The supporting legs for the fire pot structure, including the generating and burner structure, are shown as at 1, and a suitable liquid fuel conducting conduit is shown at 2, both the legs 1 and conduit 2 being directly connected to and carried by the fuel reservoir. The legs or bolts 1 are preferably turned down to form a shoulder at the upper end and suitably threaded to receive suitable lugs 3 forming a part of our combined burner and top structure, which may be generally designated 4.

The conduit 2 is adapted to conduct suitable liquid fuel under pressure to a valve housing 5, controlled by the valve 6 from where the liquid fuel is adapted to be conducted to a suitable generator tube 7. This generator tube is best shown in Fig. 2 and is preferably positioned at one side of and below the annular burner 4. A suitable blast deflector 8 is pivotally mounted in front of and above the end of the generator tube 7 and is adapted to be swung into position in front of the generator tube to deflect fuel vapor initially issuing therefrom back against the generator to accelerate starting, and adapted to be swung to an upper position to permit the generated fuel to be projected towards and into a mixing conduit 9 spaced from and in alignment with the generator tube 7.

This mixing conduit 9 terminates in an upwardly directed manifold conduit 10, which conducts the generated and mixed fuel towards the annular burner member, as will be later described. The upturned portion of the manifold 10 is to prevent any raw fuel from b61119 conducted to the burner, but instead, conc ucting raw fuel back toward and into the priming cup, as shown in dotted lines in Fig. 2. The manifold 10 preferably extends downwardly towards the outlet, as at 11, and is connected to the under side of the annular burner member 4, as best shown in Fig. 3.

Near the point at which the manifold is connected to the burner member it is provided with an auxiliary burner member 12, as shown in dotted lines in Fig. 2, which extends parallel alongside of the generator tube. This auxiliary burner is constantly fed with combustible fuel during the operation of the fire pot and is provided with suitable burner openings directed toward the generator tube whereby to heat the generator tube and maintain vaporization of the fuel.

The annular burner structure 4 is best shown in Figs. 2 and 3 and preferably consists of an annular hollow burner member having a top portion 13 and a solid outer side 14, a bottom 15 and a slotted inner wall 16. The lower wall 15 of the burner member is member 17 is held in position by means of an integrally cast member shown in Fig. 4. This member may be generally designated 18 and comprises two annular spaced rings 19 and 20. The member 18 preferably fits within the annular screen member 17, and upon being forced down into place, as shown in Fig. 3, holds the perforate screen 17 in position, the ring members 19 and 20 cooperating with the upper and lower portions of the slotted wall 16.

The base member 4 is preferably provided with suitable extensions which are adapted to be positioned beneath suitable lugs 21 of the member 18, the lugs of the burner member being suitably drilled and tapped to receive screws which are adapted to be in sorted in suitable apertures in the lugs 21. The projections on the burner member thus form supports for the member 18, and by means of the screws the member 18 is rigidly held in place. The perforate screen 17 therefor forms an annular burner outlet for the annular burner member 4 whereby the vapoized fuel is projected inwardly towards a common center in a plurality of fine streams.

The integral member 18 is also provided with a flame deflector member 22 which forms an upwardly extending convex surface centrally of the annular perforate screen 17, and preferably extending slightly thereabove, whereby the fuel vapor and flames issuing centrally from the screen 17 may be deflected and projected upwardly. The member 18 is also formed with suitable stepped supporting members 23 which are so positioned, as shown in Fig. 2, as to receive standard melting pots or to assist in supporting soldering irons or other members to be heated. A suitable shield 24 is preferably positioned on the top part of the combined burner and top plate 4, the top 13 of the burner supporting the shield, as shown in Fig. 3. This shield may be of various forms, and in some fire pots may be quickly interchanged for shields of other forms. As shown in Fig. 3, the shield is preferably so shaped as to confine and concentrate the flames around the metal pot, or in the form of shield shown in Fig. 1 which confine the heat to the soldering iron or other element or elements being heated.

It will thus be seen that by providing an annular burner member positioned above the generating apparatus, and having its inner wall slotted to project the flames inwardly, that such annular member forms also a very desirable top plate, whereas, where the burner member is formed centrally of the fire pot, or in a lower position to assist in heating the generating coils, it is necessary to provide a separate top plate. It will thus be obvious that our novel and compact burner structure not only is very conveniently located, compact and produces an efficient blast of flame, but also serves as a top plate. This top plate, being the top member of the burner structure, and the flames being directed inwardly and upwardly, is never subjected to any intense heat and will thus last the life of the fire pot, or the life of the main burner structure. Furthermore, the burner not only serves as a top plate but also serves as a main supporting member of the fire pot, as it carries the shield member, the manifold and the priming pan, and also assists in locating and carrying one end of the generating tube, as best shown in Fig. 2, and it also carries a handle 25. Thus by being positioned above the generating apparatus and being of compact and strong structure, this novel combined burner structure and top plate makes possible a very compact novel and efficient fire pot assembly.

hat we claim is:

1. A fire pot of the liquid fuel type comprising in combination, a fuel tank, an annular hollow burner member positioned and directly supported by rods extending upvardly from the fuel tank, the top wall of said burner member serving as a top plate for the fire pot, and the inner wall only being slotted whereby to initially direct the fuel vapor inwardly and centrally of the annular burner, an annular perforate screen member positioned adjacent said slotted wall, and means in registry with said slotted wall portions for holding said screen member in position, said perforate screen forming a plurality of burner openings for directing the liquid fuel inwardly and centrally from the burner member in a plurality of fine streams.

2. A fire pot of the liquid fuel type comprising a combined burner and top plate, said combined burner and top plate being annuand hollow in formation, having its inner circumferential wall slotted, a perforate screen element for forming burner openings extending around and adjacent said inner wall, and an integrally formed member positioned centrally of said combined burner and top plate and comprising spaced ring members, for holding said screen member in position, a flame deflector plate and deflecting the flames upwardly and centrally of the burner and supporting lugs for positioning the member to be heated above the deflector plate, said integrally formed member being secured to and supported by said combined burner and top plate.

3. A fire pot of the liquid fuel type comprising a combined burner and top plate, said combined burner and top plate being annular and hollow in formation and having its inner circumferential wall slotted, a perforate screen element extending around and adjacent said inner wall, and an integrally formed member positioned centrally of the burner and comprising spaced ring members, for holding said screen member in position, a flame deflector plate positioned centrally of the burner for deflecting the flames upwardly and supporting lugs positioned around the periphery of said deflector plate for supporting the member to be heated.

In testimony whereof we affix our signatures.

JAMES IRONSIDE. CLARENCE B. OVERLY.

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