US1678828A - Vapor burner - Google Patents

Description

scHUl- VAPOR BURNE Filed Aus- 1926 Patented July 31, 192 8.

UNITED STATES PATENT, OFFICE.

EDWARD SCHULTZ, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE N iGEL-onas MFG. co,

or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

VAPOR BURNER.

:' like. Frequently some of this lining, or the lint therefrom,'is shaken loose by the rush of fuel and air in response to a pressure within the font-of perhaps pounds per square inch. A vibration or tremor is apt to ensue, and the lint or lining .particles which are developed in consequence tend to clog the fine orifice of perhaps .006 inch at the tip end of the tube. In addition, the .walls of this tube, before the burner has been ignited, will ordinarily chill the fuel to the extent at least of preventing its proper vaporization, thus conducing to theformationof carbon deposits, low efficiency, etc.

By the improvements of the present invention I overcome the difficulties noted.

I accomplish this by the useof a cup shaped disk having an aperture of about 1010 through which the fuel is required to pass before enteringthe generating tube. This aperture is so designed in relation to the fuel pressure and other factors as to cause the fuel to enter the generating tube in the form of a fine stream, the consequence .being that the fuel fiow is better controlled and complete vaporization of the fuel is effectively promoted. v

These and other objects of my invention are set forth in the accompanyingdrawing, in the manner following:

Figure 1 is a view in elevation of a lamp equipped with the present burner, with the shade therefor appearing in section;

.Fig. 2 i'san enlarged transverse section on line 22 of Fig. 1; i

Fig. 3 is a detail in vertical section, taken on line 33 of Fig. 2;

Fig. 4 is an enlarged detail in vertical section through the fuel valve and connections proximate thereto; and

Fig. 5, which is an enlarged detail in section, shows the disk which restricts the fuel flow into the generating tube.

I would have it understood that the improved features herein set forth are applicable generally to vapor burners, without special regard to. the-particular lamp or lantern structure with which they are incorporated. For purposes of exemplification, a lamp such as is shown in Fig. 1 may conveniently be' referred to. It comprises a hollow base 10 constituting a font for the reception of a volatile liquid fuel, such, for example, as gasoline or kerosene. It may be provided, as is usual, with a plug 11 which provides a closure for the filling opening.

Extending upwardly from the font is a tube 12 which, if desired,'maybe surrounded by a handle13 by which the, entire lamp may be conveniently moved about.

Connected to the upper end of the tube 12 is a T-fitting 15 wherein is the screw stem 16 of a needle valve. A knurled wheel 17 connected with the stem affords a ready means for its manipulation. This valve is movable lengthwise within a chamber having a conicalend against which the pointed stemend may seat. Extending axially from the chamber end is a passage 18 which connects with an oblique passage 19 leading downwardly into the tube 12 An outlet from the valve chamber is provided in a vertical passage 20 whichextends through the upper end of the fitting which is in the form of a threaded nipple. Seated against the nipple end is the lower flanged end 21 of a generating tube 22 which extends upwardlyfrom the fitting15 to the burner of the lamp. Surrounding this tube adjacent to its lower end is a collar 23 which receives pressure from a coupling nut 24 detachably secured to. the nipple, the generating tube being'connect ed to the fitting preferably in some such manner.

Referring now to Fig. 5, it will be noted that in the lower end of the generating tube I have fitted a disk'25 upwardly cupped" in its center as at 26, there being through the cup. center a very fine aperture 27 The walls of the disk cup may be tapered very slightly so as to engage with the tube 22 with an increasing pressure, this friction being sufiicient to hold the disk in place at all times. At all times when the needle valve isopen a pressure of fuel will be exerted against this disk, which permits only a very small amount of fuel to escape through itsopening, the fuel being reduced to the form of a fine stream as it enters the generating tube. By this means I prevent any sudden rush of fuel through the generating tube such as to cool off the burner before the lamp is operating, and protect the asbestos packing 28 within the tube from being dislodged.

At its upper end the generating tube communicates with a mixing chamber 30 with which connects a depending air pipe 31, the lower end ofwhich is secured to a base plate 32 laterally extending from "the fitting 15.

this means the air pipe serves as a support for the burner and the several parts which are carried thereby.

Included in the burner structure is an upwardly extending pipe 33 which connects with a manifold 34 from which leads-downwardl a air of de Jendin tubes- 35 each point between its ends is a flue of any appropriate kind. As shown, it consists of sheet metal, preferably copper, or a copper alloy, having incisions which permit certain portions thereof to be inwardly bent the form of straps 41. The remaining proximate portions constitute outer straps 42 (see Fig. 3). vElsewhere the flue walls are bent around, as at 43, to embrace the generating tube upon opposite sides thereof.

As shown,the embracing edges of the flue approach each other closely upon the rear side of the generating tube. The space intervening between these edges maybe filled, as at 44, with a solder of silver. The flue is adhered to the generating tube preferably by brazing, so as to obtain a maximum heat conducting connection therewith.

At the time the present burner 'is to be started, the flame of a match, or other small combustible article, may be applied to one side of the generating tube just below the flue thereon. The flame will impinge against the lower edges of theinner and outer straps 41 and 42; it will also come in contact with the generating tube behind the inner straps 4'1, but not elsewhere. The

It is manifest, of course, that the exact form and shape of this flue may be modified in various ways, but inasmuch as the present invention .is not concerned particularly with this feature, it is needless to dwell further thereon. To the disk, at the lower end .of the generating tube, however, and the manner of its co-operation with the associated elements, I attach considerable importance. Not only is the suggested construction simple to produce and assemble, but the results -.de-

rived therefrom are especially'noteworthy. An aperture in the disk, of perhaps .010 inch, operates very satisfactorily to control :the fuel flow so as to avoid sudden chilling of the tube walls with ,a consequent retardation of fuel vaporization, and also to safeguard the tube packing against disintegration due to impact of excess fuel pressure. I claim. 7 '1. Ina vapor burner thecombinationwith a source of fuel supply having a valved out-' let therefrom, of a generating .tube detachably connected with said outlet and including in its structure an outwardly turned. flange at the lower tube end, acup shaped disk associated with the .tube, the disk edges lying adjacent the tube flange and the cup i portion being upturned to lie within the tube end, there being an aperture of small size through the disk such as to restrict the fuel flow therethrough, and a packing material within said generating tube .and retained by said disk. V

'2. In a vapor burner, the. combination with a source of fuel supply having a valved outa let therefrom of a generating tube one end of which abuts-said outlet, adisk interposed between the outlet and tube having a portion of itself frictionally fitted to the tube,

the disk being provided with an aperture of small size such as to restrict the flow of fuel therethrough before entering the generating tube, a packing material withinsaid generating tube and retained by said disk, and

place.

EDWARD SCHULTZ.

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