US1804473A - Valve for gas burners - Google Patents

Description

May 12, 1931. c. v. LINDBLooM VALVE FOR GAS BURNERS Filed May .23, 192e v`""""""""`"""""""""""" """`I-"" V nl llll J vat/IVII1 ATTORNEY Patented Mayy 12, 1931 UNITED stares .ze-TENT OFFICE CHARLES V. LINDBLOOM, OF CRANFORD, NEW JERSEY, ASSIGNOR, y:BY MESNE ASSIGNL MENTS, TO CHI-HEAT GAS C0. INC., 0FV NEW YORK, N. Y., Ak CORPORATION OF NEW YORK c VALVE FOR GAS BURNERS i Application mea May as, A192s. serial No. 280,078.

There is on the market a fuel in the form of a liquid which'is generally sold in containers vand the fuel is adapted to be'used for household and other gasy sto-ves, the fuel being converted `from the liquid to the vapor phase just before it reaches the point of comustion. The fuel is made by liquefying natural gas. The object of the present invention is to provide a valve which will serve to vaporize the fuel and while it is particularly adaptedV for use with the kind of fuelde-L scribed above, nevertheless Athe invention is not limited to this particular purpose. In burning fuels, particularly the kind described, which is converted from a liquid to a vapor,it is customary to employ a needle valve to control the feed of the fuel to the burner and'to cause the fuel to be atomized as it is discharged from the needle valve. One of the difficulties of former devices hasbeen that in first starting thel operation of the burner, as when the gas is turned on and is ignited at the burner, there is a sudden rush of gas which causes the flames from the burner .to rise `considerably above Vthe normal condition. There is also a tendency for the burner to make considerable noise when rst started, and in addition the action at the time of starting is irregular and otherwise obj ectionable. The present device makes'it possible to start the burner without the sudden flashing up of kthe flames, and to start it practicallyV noiselessly. Where the present device is used, as soon as the needle valve is opened a match may be held over the burner and the gas will ignite and burn smoothly, quietly and with the saine character of flame as when the burner has been in operationfor somev and y showing Figure 2 is an elevation, partly in section.,` l

valve,`

Figure 3 is a sectional View taken on the line 3 3 of FigureQ,

Figure 4; is a sectional view on an enlarged scale of the'two members in which the restricted orifices are formed, and b Figure 5 is an end view of one of these memers.

In the drawingI have shown an ordinary burner which mayfcomprise one of the burners commonly used in a gas range, and it consists: of the several hollow radially arranged members l having apertures 2 in the top wall, from which the gas is discharged, and above it the gas burns in the rform of flames. As far as my presentinvention is concerned, this burner may take any form, and I have illustrated one type of burner merely by way of illustrating one application of my invention. Preferably, the Yburneris provided with an eXtensonB in communication with two of the radial members 1 and this extension is provided with a number of apertures 4 to provide flames whichwill serve to preheat the fuel while itis passing through the atomizing valve for the purpose of rapidly vaporizing'the fuel. These features are per se all in common use at the present time.

The curved neck 5 serves to feed the fuel to.

the burner 1, and my improved valve may be conveniently applied to the outer end of this curve-d neck (asshown in Figure l). There is a coupling member provided with a longitudinal bore7 extending therethrough, and there is a lateral bore 8 by means of which the fuel is conveyed to the longitudinal bore the details of my improved 60 by means of the tube 9 threaded into the couplied to the consumer. The valve spindle projects at 11 beyond the coupling 6 and its outer end is provided With an operating handle 12 b means of which the valve spindle is adapte to be operated. Vhere the valve stern projects through the end of the coupling there isV preferably a Vnut 13 for holding a packing or stuffing in close lit around the por;

`ed to be-entirely shut olf this point by means of a valve 17 which is merely a frustroconical shoulder on the valve stein 1() Which Vis adapted to seat against Vthe valve seat 18 composed off'a shoulder in the coupling-member 6.V I

Y, have also shown a tubular member 19 threaded into one end of the coupling 6 as shown at 20 which tube forms avcontinuationfof. the coupling member; that is to say, the bore 21 of this tubular extension and the bore 7 of .the coupling member form a continuous pas sage for the fuel( The valve spindle 10 has a reduced portion 22 which extends along the bore of the tubular extension 19 but it does not lill this bore, so that an annular space 23 betweenthis spindle and themember 19 per'- mits the fuel topass through the tubularvv member. I have shown a coiled spring 24 surrounding the reduced portion 22 of the spindle near one end yof the latter, Which serves as a bearing for this endr of the spindle, which bearing however, permits the fuel to pass the coils of the spring.

The portions of the valve forming the main features of my invention may be 'constructed in various Ways, but I Will here describe the form which vI prefer to use, both for simplicityl and for accessibility'. YThere is a cap 25 provided with an internalthreaded bore 26 and this isadapted to cooperate With an eX- ternal thread 27 on the outer,free end of the tubular member 19. The cap may be provided vvith a polygonal flange 28 to receive a Wrench for the purpose of screwing the cap onto the tubular member 19. This cap .has an end Wall 29 in Which is' formed-.ai vaporizing chamber 30, preferably ofconicalshape, and open at one end into the bore-26 of the cap. The opposite, smaller end of thisvaporizing Vchamber merges with a small orifice 31 which forms an opening in the head .29 of the cap. There is a plug or filler 32 shown enlarged in Figure l, which has a laterally Ktending flange 33 on its periphery. This plug or filler is adapted to slide in the boreV .26 and to seat against theA shoulder34 ad.

jacent the larger end of the vaporizing chamber 30. Vhen seated in this position the end of the tubular member 19 seats against one side of thevfiange 33 and surrounds the tubular portion 35 of the filler member, so that no fuel can pass, except through'the .restricted orifice hereinafter described. The filler or 'Y plugi-s provided with a restricted orifice 36 and preferably thereY is a conical chamber v. communicating With this'orifice.

The end of the valve spindle is provided with a needle 38 which extends through'the restricted orifice 36 and the point of this needle (3o-operates with the restricted orifice 31 in the head 29 of the cap. The orifice 36 is slightly larger thanzthe diameter of the needle 33, so that thereiisan annular space between theneedle andthe .filler member 32.. lthrough Which .the fuel maypassinto the eX-r pansion chamber y30. In the adjustment. of

the needlethere is nov alteration in this annu-v lar space between the needleand the llmg Vmember 32 as I have found that the regula-Y tion'of Athe fuelmaybecontrolled entirelyby .theY co-operation :of thepointof the needle with the orifice 31. The latter orifice is, A.

preferably, slightly `smaller than the orifice.V

Y Operation' 'When itis desiredto start the. burner,.a

lightedmatch may be .held over :the burner openings 2, and the-valvehandle 12 is turned A slightly, so that the valve stemfmovesto the left in Figure 2.V Thisunseats the valve 17;

from the seat 18 andallows the fue'lto pass from the supply pipe 1.9, through the port 8,

into the chamber 16 of the coupling 6.l From there the fuel passes through'. the annular spacebetweenthespindle 10 andthe tubular g member 19, passing throughthe convolutions of the bearing member 24 andthe fuelv then passes into the conical opening. 37 in the filler member. It then passes through-the annular.l

space between the Vneedle .3.8 andthe Wall of the orifice 36. Vhere the'device-isiused for the character offuel referredto above, the

fuel will remain in the liquid state v,untilit passesthrough the orifice 36 at which time it; Will be broken up or atomized into avapor and enter the expansion chamber 30. The fuelmay .expand in this latter chamber land accumulate, land-from this :chamber itpasses Y throughthe orifice 31 which further breaks up and atomizes the fuel, so that bythe time it passes into the neck 5 itis completely. vaporized.- `The fuel passes through the neck 5 into :the burner and as it emerges from the apertures ,2; it isV ignited and 'combustion takes placein the form of a number of jets,

depending upon the number of apertures iny lIl() this tub-ular member, in order to expand it and assist in the vaporizing action, or in the conversion of the fuel from the liquid to the vapor state.

By passing the fuel first through the orifice 36 and then into an expansion chamber 30 it allows it to expand and accumulate and by then passing the fuel through the second orifice 31 lI have found that Vmore perfect regulation in flow of the fuel may be obtained and that all of the difculties heretofore occurring more especially during the starting of the burner, and to some extent during f operation thereof, are eliminated. As the fuel passes through the first orifice 36 it is atomized and it is expanded in the chamber 30 so that when it passes through the second orifice 31 it is further atomized. By the time, therefore, that it discharges from the orifice 31 the fuel is fully Vaporized even at the beginning of the operation, and before the heat projected against the tube 19 has raised the temperature of the fuel within this tube. This arrangement of dou- 4 ble orificeswith an expansion chamber between them also prevents any back action or tendency to backfire previous to the heating of the fuel in the tube 19. The' regulation ofthe flow of fuel is accomplished by turning the handle 12 in order to vary the position of the point of the needle 38 in relation to the orifice 31. While the needle .moves in relation to the member 32 is does j not necessarily change the size of the first orifice 36. This is not necessary as the regulation at the second orifice 31 is sufficient to 1. A valve for atomizing fuel, including y a tube for the passage of the fuel, a cap having a restricted outlet orifice and anexpansion chamber adjacent thereto, said cap having a threaded bore adapted to screw onto said tube, a lling piece insertible intoksaid bore of said cap and having a restricted oriiice in communication with said expansion chamber, and a needle passing through said last mentioned orifice and (1o-operating with said first mentioned orifice lto regulate the flow of Huid.

2. A valve for atomizing fuel, including a tube through which the fuel passes, a cap for said tube having an end wall provided with an outlet orifice and havingk an expansion chamber adjacent said orifice, said cap having a threaded bore adapted to be threaded onto said tube, a fillingmember insertible previous to passing through into said cap and having a lateral flange and a tubular projection, said tubular extension

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