US1760390A - Pressure burner - Google Patents

Description

I May 27, 1930; F. E. WHITE ET AL PRESSURE BURNER Filed June 15, 1928 4 Shams-Sheet *flfizuen l'omg- E d E. Whil'efi,

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F. E. WHITEE-r AL PRESSURE BURNER Filed June 15, 1928 4-Sheets-Sheet 3 (I ii k g, h 1721282210129; N 5 I .ikedzzwhiteg AZ red Ruth an ygM WAM'Z; EMMM J May 27, 1930. F. E. WHITE ET AL' PRESSURE BURNER 4 Sheets- Sheet Filed Jun 15, 1928 Patented May 27, 1930 UNITED STATESv PATENT OFFICE FRED E. WHITE AND ALFRED RUTTIMAN, OF BOSTON, MASSAGHUSETTS,ASSIGNORS 'IO FLORENCE STOVE COMPANY, OFBOSTON,

SACHUSETTS MASSACHUSETTS, A CORPORATION OF MAS- PRESSURE BURNER Application filed June 15,

This invention relates to burners forheating stoves adapted to operate on gaseous fuel produced by vaporizing by means of heat a normally liquid hydrocarbon such as kerosene.

The primary object of the invention is to provide a burner as above which will initially vaporize sufficient fuel to start the burner and which, after being started, will automatically heat and vaporize additional similar fuel so as to keep the burner or burners in operation as long as the fuel supply lasts.

In addition it is the purpose of this invention to provide means whereby a single master burner or generator is used to not only furnish its own gaseous fuel but to supply the necessary quantity to the other burners of the stove.

To this end the invention contemplates the provision of a fuel tank supplied with a liquid fuel preferably under pressure, which tank furnishes its liquid fuel "to the stove supply line. A drip cock is provided which bleeds the supply line to furnish fuel to the ignition and preheating device. This device comprises a double spaced apart chimney tapered at the top so that the heat generated therein will be directed against the master burner. This ignition device is provided at its lower portion with a longitudinally movable drawer carrying a wick or kindler, the drawer being capable of being partially withdrawn to a point that the drip cock will do liver liquid fuel directly into it. Thus a quantity of liquid fuel as such is placed in the ignition drawer, which quantity is normally suflicient to preheat the generator, so that when fuel is admitted to it, it will be completely vaporized and may be burned as a gas. The igniter operates as an atmospheric blue flame burner and automatically extinguishes itself as soon as its fuel supply has been consumed.

The generator and master burner proper comprises upper and lower shells secured together fuel tight, having at one end an opening through which the generator tube and valve spindle extend. The burner proper is provided with an elongated opening there through into which extends the finned and re- 1923. Serial No. 285,528.

duced end of the generator tube. This generator tube end is located directly over the top of the igniter atmospheric burner and is heated thereby.

The construction of the generator includes an elongated tube connected at one end tothe fuel supply pipe and having a restriction at the other onto which the valve spindle seats to close the passage. The other end of the valve spindle extends through a suitable packing to the front of the stove and is provided with a knob or handle to facilitate turning.

The generating end of the generator tube consists of a finned fixture torch welded or otherwise secured to the end of the generator tube. The interior bore of this fixture is adapted to receive the threaded end of the generator spindle. The spindle end is provided with a longitudinal slot, thus allowing the liquid fuel to flow past the threaded portion. In one form of spindle, a nozzle tube is welded into the end of the fixture and upset inside the bore, which upset portion serves as a seat for the threaded end of the valve spindle. In another form, the nozzle tube is secured within the bore of the fixture and the spindle seats directly against the. end thereof. An axially extending needle projects beyond the, threaded portion of the spindle and througha restricted nozzle in the end of the nozzle tube. As the needle is only spaced slightly from the bore of the nozzle tube, the fuel between them may be readily and quickly heated.

The burner shells are provided with slots on top and at the sides of the opening therein to permit the vaporized fuel to be burned under the cooking vessel andin proximity to the generator. A conduit leads from the rear of the master burner to a plurality of other is necessary.

The invention further consists in the novel arrangement, combination and construction of parts more fully hereinafter described and shown in the drawings.

In the drawings:

Fig. 1 is a plan view of a burner assembly.

Fig. 2 isa fragmental front view of Fig. 1. 1

burners so that but a single generator Fig. 3 is a detail partly in section of the generator assembly.

Fig. 4 is a sectional view along the line H of Fig. 3.

Fig. 5 is a plan view the generator assembly.

Fig. 6 is a side elevation partly in section of Fig. 5.

Fig. 7 is a sectional view along the lines 77 of Fig. 5.

Fig. 8 is a sectional view form of generator tube.

Fig. 9 is a similar view showing the valve unseated.

Fi 10 is a sectional view along the line 10 of Fig. 9.

Fig. 11 is a sectional view along the line 1111 of Fig. 9.

Fig. 12 is a sectional view of av preferred form of generator tube.

Fig. 13 is a side elevation of the initial burner housing.

Fig. 1a is a front view of Fig. 13.

Fig. 15 is a plan view of the igniter.

Referring with particularity to the drawings, there is illustrated at 1 a stove frame carrying a fuel tank :2, which tank supplies liquid fuel through pipe line 3 to the generator fixture. A valve 4 controls the flow of fuel through the measuring device 5.

Mounted beneath the master burner or generator is the igniter device which consists of an outer casing 6 open at the top and bottom and an inner perforated chimney 7 spaced therefrom. This chimney is open at the top but is closed at the bottom as at 8 to provide a support for the kindler drawer 9 which slides upon the bottom 8 into and out of the device. The drawer 9 is provided with upwardly extending walls and a centrally extending trough 10 carrying a kind ler or Wick 11 of asbestos or the like. The front wall 12 closes the opening in the front of the housing when the drawer is in operative position. A handle 13 is provided, by means of which lighter drawer is moved.

A measured amount of fuel is delivered to the atmospheric lighting burner through the device 5. This consists of side plates 410 secured together with an air vent i1 at the top thereof. Between the plates is secured a pipe 42 which connects to the main fuel supply on the generator fixture. Also between the side plates 40 is an inverted siphon tube 43 having a lower leg 44 projecting from the device and over the drawer 9 when the latter is pulled for igniting. When the valve 4 is opened, fuel flows into the measuring device 5 thereby filling the same, the air ventin g through aperture 41. When the level of fuel rises above the bend in the U tube, a siphonic action will take place and the entire charge of fuel in the device will be delivered to the drawer 9. As soon as fuel begins to spill over into the drawer, the valve partly in section of of a modified 41 is closed, thus insuring the proper amount of fuel to start the generator.

In operation, the lighter drawer will be pulled out until it is beneath the discharge end 1st of the measuring device 5 to receive a quantity of liquid fuel therefrom. It is then ignited and pushed back into place. It operates on the ordinary principles of the atmospheric blue flame burner and supplies heat to the generator tube directly above it. It is to be noted that the top of the igniter housing is of less extent than that of the wick, so that heat is thereby concentrated at the place desired.

Secured to a fixture 14c in the stove frame 1 is the generator tube 15 which takes its fuel from the supply pipe 3. This tube 15 extends through the burner 16 into an opening 17 therein.

The generator tube 15 has attached to its end a fixture 18 finned as at 19 to facilitate the transmission of heat to the liquid fuel therein. This fixture may be torch welded to the tube end. The other end of the fixture receives the end of a nozzle tube 20 which in one form is upset as at 21 within the bore of the fixture and thus forms a seat for the end of a spindle 22 which controls the flow of fluid. The spindle 22 is threaded to the interior of the fixture 18 and is provided with a longitudinal groove 23 permitting passage of the fuel past the threads. In another form, the spindle 22 seats directly on the end of the nozzle tube 20. The parts 520 and 18 are secured together as by welding.

In both forms a needle 24 triangular in cross section is secured to the end of the spindle and which moves freely within the nozzle tube 20 so as to spread the fuel in the nozzle tube into a thin film. This facilitates the flow of the oil gas toward the nozzle and at the same time centers the pin within the tube.

A nozzle 25 having an orifice 26 is located in the end of the nozzle tube, and it is through this aperture that the vaporized fuel is injected into the injection tube of the burner, thereby entraining the necessary primary air through opening 33.

It is to be noted that the generator tube, fixture, and nozzle tube are located in the opening in the master burner and exposed to the heat of the igniter, but so close to the burner top that little or no heat is lost.

The burner proper comprises an upper and a lower shell 27 and 28 respectively secured is together, in a fuel tight manner, supported at one end by the bracket 14 which also supports the drip pipe and valve assembly, and at its other end by bracket 30 attached to the stove frame 1.

The upper shell 27 is provided with a series of slits or elongated openings 31 through which the vaporized fuel passes and is burned beneath the cooking vessel.

The sides of the opening surrounding the generator are likewise slotted as at 32 and the burning fuel at this point serves to keep the generator and assembly hot, thus auto matically keeping up the supply of vaporized fuel once the stove is started.

Underneath the burner shell 28 at the rear there is provided a drip opening 33 in proximity to which is a funnel extension S t in the igniter assembly. Any liquid fuel not vaporized in the generator, which is sprayed out of the nozzle, therefore runs out of the opening 33 into the funnel 34 and is thereby conducted through tube 35 to the drawer 9 where it is burned through the medium of the kindler therein. Thus if the generator is opened for the flow of fuel before the liquid t-hei i completely vaporized, that unvaporized liquid will leak back into the drawer and will prolong the heating by the igniter.

The extreme rear portion of the burner is provided with a channel 36 defined by Walls 37. This channel communicates with a forked conduit, the branches of which are indicated at 38 and 89. Thus by opening other burners, the combustible gas generated in the master burner may be allowed to flow in those other burners. Obviously when additional burners are opened, the master burner or genorator must be likewise opened in order to produce a quantity of gas sufficient to supply itself and the additional burner or burners.

The remaining burners 40 are likewise composed of shells secured together, with a rotatable spindle 42 carrying valve means which,

1 when unseated, control the supply of gaseous fuel from the conduit 38 to the burner.

In operation, a measured quantity of liquid fuel is let into the drawer 9 and ignited. This heats the liquid fuel in the generator to the extent that it is vaporized. Upon opening or unseating the end of the spindle from the nozzle tube, fuel. will be admitted to the noz zle tube. This being thin walled and directly over the i gniter or atmospheric burner, completes the vaporization of the fuel. This injected vapor entrains air through opening- 33 and the mixture finds its way to the slots in the master burner where it may be ignited and burned with the well known bluish green oil gas flame. The fuel escaping from the side slots 32 continues to heat th generator so that fuel is automatically vaporized. If the spindle should be unseated before the fuel has been vaporized, it would merely leak back into the drawer, where it would continue to burn until the generator had reached the necessary temperature. Thus means are provided to absolutely take care of all unvaporized liquid fuel injected into the burners. The initial igniter or heater being a blue flame atmospheric burner, this excess oil will not smoke or soot up the burner or cooking vessel, nor produce unpleasant odors.

From an examination of Fig. 12 it will be noted that the seat on the end of the spindle 2-2 engages the end of the nozzle tube 20 and thereon. This is a much more eflicient construction than that of 8, where the seat on the spindle engages the flared end of the nozzle tube. In the former instance, it is unnecessary to provide two bores in the firture 18 of different diameter.

It will be noted that by reducing the diameter of the nozzle tube and providing fins on the par generation of a gaseous fuel. is made it on easier. This necessarily shortens the ignition period by causing more rapid gas generation, which is important.

ll hat is claimed is:

1. In combination, an elongated generator vaporizing liquid fuel, and a blue flame atmospheric burner of elongated form for heating the same, said burner having an open ing at its top for the exit of heated gases, a wicket the bottom for heating the gases, the opening at the top being restricted laterally and being of less longitudinal extent than the wick, whereby the heated gases are concentrated into a small area.

2. In combination, in a generator for convertin liquid fluid into a gas, an elongated tube adapted to receive liquid fuel from a supply pipe, a lintu havi g a tinned exterior secured to the end of the tube and having a bore of smaller diameter than the interior diameter of the tube, a nozzle tube secured in the outer end of the fixture and within the bore thereof, the exterior diameter of the nozzle tube being substantially that of the bore of the fixture, a spindle within the first mentioned tube havin a threaded portion engaging a similar portion of the fixture bore, and having a tapered projection engaging a correspondingly tapered seat in the inner end of the nozzle tube, a nozzle in the outer end of the nozzle tube, said spindle having aneedle portion movable in said nozzle tube, said needle portion cooperating with the nozzle aperture to control the discharge and being triangular in cross-section so as to form the fuel into a thin film and so as to guide and center the needle within the tube.

3. In combination, a burner for receiving its supplyof from said generator, an atmospheric burner for starting the generator to supply the main burner, including a drawer member, a kindler carried thereby, a support for holding; the drawer in operative relation to the generator, and means for delivering a predetermined amount of liquid fuel to the drawer sufficient to heat the generator to the desired temperature, and means for supporting said measuring means at a point to de' liver the liquid fuel to the drawer when with drawn from its operative position relative to the generator.

4. Apparatus according to claim 3 in which a valve controls the supply of liquid fuel to said measuring device.

5. In combination, an elongated generator for vaporizing liquid fuel, a burner having an opening therein for receiving the generator in close proximity to said burner top, said burner receiving its supply of gas from said generator, an open top and bottom atmospheric burner housing depending from said burner beneath the generator, an atmospheric burner within said housing, said atmospheric burner including a drawer in said housing movable in a direction lengthwise of said generator and a kindler in said drawer, and means to introduce liquid fuel into said drawer.

6. In combination, a generator for vaporizing liquid fuel, a burner receiving its supply of gas from said generator, a casing depending from said burner beneath the generator and a drawer mounted for longitudinal movement within said casing, a kindler in said drawer, and means to introduce liquid fuel into said drawer.

7. Apparatus according to claim 5 in which said drawer has upwardly extending walls providing a centrally extending trough for receiving said wick, said drawer having a front wall closing the drawer receiving opening in the front of the housing when the drawer is in position in the housing.

8. Apparatus according to claim 5 in which said atmospheric burner housing has an opening at its top for the exit of heated gases against said generator, the opening at the top being restricted so that the heated gases are elfectively concentrated and directed against the generator, said burner housing at the top being of less extent lengthwise than the lengthwise d mension of the wick in the bottom thereof.

9. In combination, a generator for vaporizing liquid fuel, a burner receiving its supply of gas from said generator, an atmospheric burner housing depending from said burner beneath the generator, an atmospheric burner within said housing, means to introduce liquid fuel into said atmospheric burner, and means to introduce through said housing into said atmospheric burner any unvaporized fuel discharged from said generator, said atmospheric burner including a longitudinally movable drawer in said housing and a kindler in said drawer, said fuel introducing means being disposed adjacent said housing, said drawer being movable in said housing to a partially withdrawn position to receive liquid fuel from said fuel introducing means and for ignition and being movable to position it wholly within said housing to heat the generator and to receive any unvaporized fuel discharged from said generator.

10. In combination, a generator for vaporizing liquid fuel, a burner receiving its supply of gas from said generator, an atmospheric burner housing depending from said burner beneath the generator, an atmospheric burner within said housing, means to introduce liquid fuel into said atmospheric burner, and means to introduce through said housing into said atmospheric burner any unvaporized fuel discharged from said generator, said burner being provided with an air entraining aperture adjacent the vaporized fuel discharge end of the generator, said means to introduce into the atmospheric burner any unvaporized fuel discharged from said generator comprising said air entraining aperture through which such unvaporized fuel passes and a conduit in said housing for receiving such unvaporized fuel passing out through said air entraining aperture, said conduit in the housing delivering the unvaporized fuel to the atmospheric burner, thereby providing automatic regulation of the atmospheric heater for the generator.

11. In combination, a generator for vaporizing liquid fuel, a burner receiving its supply of gas from said generator, an atmospheric burner housing depending from said burner beneath the generator, an atmospheric burner within said housing, means to introduce liquid fuel into said atmospheric burner, and means to introduce through said housing into said atmospheric burner any unvaporized fuel discharged from said generator, said atmospheric burner including a longitudinally movable drawer in said housing and a kindler in said drawer, said fuel introducing means being disposed adjacent said housing, said drawer being movable in said housing to a partially withdrawn position to receive liquid fuel from said fuel introducing means and for i nition, said fuel introducing means constituting a measuring device for delivering a predetermined amount of liquid fuel to the atmospheric burner and comprising a shell, a siphon tube therein having its longer leg protruding from the shell, an air vent for the shell and means to supply the shell with liquid fuel until the fuel discharges from said siphon tube, said generator and said fuel introducing means being supplied with liquid fuel from the same main supply by means of a two way valve.

12. In combination, a generator for vaporizing liquid fuel, a main burner having an elongated opening therein for receiving the generator between the walls of the opening in the burner, and a starting burner for heating the generator, said starting burner being disposed below the main burner and generator and having an elongated opening at its top for the exit of heated gases to heat the generator, said elongated opening in the starting burner being of substantially the same size as and registering with the elongated openng in the main burner, the walls of the starting burner extending vertically upward from the elongated opening in the starting burner into connection with the walls of the main burner surrounding its elongated opening, a continuous substantially uniform vertical passage for the heated gases from the top of the starting burner to the cooking vessel on top of the main burner thus being provided, the Walls of said starting burner having openings therein for the admission of air to assist combustion.

In testimony whereof, We affix our signatures.

FRED E. WHITE. ALFRED RUTTIMAN.

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