US1014111A - Gas-burner. - Google Patents

Description

' J. B. ANDBRSGN.

Patented Jan. 9, 1912.

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CDLQMBIA PLANOGRAPM'C0WASHI'NGTON, D. C

J'. B. ANDERSON.

K GAS BURNER. A.*PPLIGATION FILED AUG. 1e, 1911.-

Patented Jan. 9, 1912.

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ASSIGNOR OF ONE-FOURTH TO WILLIAM G. BOYLE, ONE-FOURTH TO JOSEPH GEI-IRING, AND ONE-FOURTH TO JOI-IN FUERSTENBERG, ALL VOF ALLEGHENY COUNTY, PENNSYLVANIA.

GAS-BURNER.

Speccaton of Letters Patent.

Patented Jan. 9,1912.

Application filed August 16, 1911. Serial No. 644,412.

To all whom it may concern:

Be it known that I, JAMES B. ANDERSON, a citizen of the United States, and residing in the township of Shaler, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Gas-Burners, of which the following is a specification.

My invention consists of certain new and useful improvements in burners for either natural or artificial gas or other fluid fuel.

I show novel means for correlating the admission of both air and gas into the mixing chamber so that the proportion of the one element to the other is maintained constant, as regulated, notwithstanding the degree to which the valve mechanism of the burner is opened or closed.

I show a novel multiple needle valve structure which I use in connection with my burner, and means for controlling the same.

I show a plurality of my burners arranged in a battery and connected up for simultaneous and automatic control. so that the temperature predetermined may be maintained without the constant watching of the operato-r.

Other novel features of construction and arrangement will appear from the following description.

In the accompanying drawings, Figure 1 is a plan view of my burner; Fig. 2 is a longitudinal section thereof along the line II-II in Fig. 1; Fig. 3 is a cross sect-ion thereof along the line III-III in Fig. 2, the diaphragm being cut away to show the needle plate and the needle plate being in turn cut away to show the operating lever, and Fig. 4t is a diagrammatic view showing a plurality of my burners, constructed in accordance with the preceding figures, connected together for simultaneous and automatic control, the thumb nuts and the ears being omitted.

The following is a detailed description of the drawings. The burner casing proper is composed of the gas chamber A, the valve box B and the mixer C through which the mixture of gas and air is injected into the furnace, not shown. 'The gas chamber A has a reduced outer end by which it is connected to the source of gas supply, such as the pipe 1. The ends of the valve box B are threaded externally and engage respectively the internal threads on the ends of the parts A and C. The mixer C has aV cylindrical base, and a tapered outer or discharge end to act as an injector for the mixture.

Q is an internal shoulder in the butt of mixer C adjacent to the threads therein.

3 is a diaphragm plate which' fits up against the shoulder 2 and is held in place by the end of valve box B when the latter is screwed into place.` The diaphragm 3 is provided with a plurality of perforations 1-4 preferably arranged in an annular series concentric with said diaphragm.

5 is a concentric stem and 6 an eccentric stem extending from diaphragm 3 into the interior of element B.

7 is a needle plate, preferably having a solid circular center and arms 8--8 extending radially therefrom, upon which arms are mounted the needles 9-9, preferably tapered, which engage the perforations L1---4V in the diaphragm 3. The plate 7 is provided with an axial stem 10 which is provided with a longitudinal perforation `to accommodate the stem 5 of the diaphragm 3 and a hole 11 is also provided through the plate 7 engaged by the stem 6 to prevent ac cidental rotation of the plate 7 4 12 is a journal box cast or formed integral with the outer wal-l of valve box B and conimunicating therewith by means of a slot 13. But one end of the box 12 is open and the rock shaft 141 extends thereinto, a stutling box 15 being provided to prevent the escape of gas through the open end of said journal box. An arm 16 is screwed onto the inner end of shaft 111, which is threaded for that purpose, said arm extending through said slot 13 into the interior of valve box B where it engages a lateral recess 17 in the stem 10 of needle plate 7, said recess having its top and bottom walls beveled toward the ends of the recess to permit the arm 16 to rock freely. It is evident that the rocking of the shaft 14. will correspondingly move the plate 7 and the needles 9%-9 in .the perforations 11-4 thus altering the discharge capacity of Vsaid perforations, and regulating the amount of gas admitted to the mixer C.

18 is a lock nut screwed up on shaft 1-1 against the arm 16 to hold it against rotation on the rock shaft.

19-19 represent longitudinal air ports in the butt of mixer C and 20 is a cylindrical shutter slidingly mounted on the butt of said element to regulate the admission of air through said ports into the interior of mixer C.

21 is a rocking lever pivoted intermediate of its ends to the stud 22 on the mixer C.

23 is a link pivoted at one end to one end of the lever 21 and at its other end to a stud on the shutter 20.

24 is an arm mounted on the exposed end of rock shaft 14 and held against rotation thereon by a set screw 25. 26 is a slot in the other end of arm 24 in whichat any desired point may be locked the pin 27 which is pivotally connected to the end of rocking lever 21. It is thus evident that by the above mechanism the movement of the shutter 2O for the admission of air into the mixer C is correlated with the movement of needle plate 7 which controls the admittance of gas into the mixer C, and the proportion of air to gas is maintained constant. The proportion may be adjusted by rotating the arm 24 on the rock shaft 14 and fixing it in its adjusted position by the set screw 25, or by moving the pin 27 along the slot 26 and fixing it in its adjusted position.

To provide a convenient means for operating the mechanism which controls the shutter 20 and the needle plate 7, I prefer to provide the lever 24 with a lateral projection 2S which is pierced by a threaded hole engaged by the threaded end of the thumb bolt 29 whose other end is held against longitudinal movement between the ears 30 30 on gas chamber A. It is evident that the rotation of the bolt 29 lwill raise or lower the lever 24 and therefore will open and close the shutter 2O and adjust the needle plate 7. A set screw 31 may be provided to prevent the accidental rotation of bolt 29 in the projection 28.

As it is frequently desirable to operate a battery of burners in conjunction, I connect the operating mechanism of the same to a rod 32 whose lateral pivot studs 33 engage holes 31--33a in lateral extension 3434 on the arms 24`24, so that a longitudinal movement of said rod 32 adjusts the shutters 2O and the needle plates 7 of the burnersV at one and the same time and to the same deree.

g To provide automatic control for a battery of burners a device of any convenient type, operated by the temperature of the furnaceor boiler may be connected up with rod 32 to actuate the same cutting down the supply of mixed air and gas when the temperature rises beyond a predetermined degree and increasing the same when the temperatu-re falls below said degree fixed upon. Thus in case of a steam boiler or steam boilers, I may provide a steam cylinder 35 connected at its rear end by a pipe 36 with the boiler. Under the influence of the steam admitted through the pipe 36 the piston 37 in said cylinder is forced forwardly against a coiled spring 38 whose other end bears against a plate 39 in the cylinder 35 and mounted on the end of the stuffing box 40 which is threaded into the front end of the cylinder 35, so that by the movement of said stuffing box the tension of the spring may be adjusted. The piston rod 41 passes through said stuiiing box and is coupled up to the rod 32. The spring 38 may be adjusted to any desired resistance, which is overcome when the pressure in the boiler and conseqeuently in the cylinder 35 rises to a fixed degree, thus forcing the piston outwardly against said spring and cutting down the amount of mixed air and gas admitted through the burner or burners connected to rod 32. Then the pressure falls, the spring 3S overcomes the pressure in the cylinder and forces the piston rearwardly and restores the normal amount of air and gas admitted to the burners.

IVhere my burners are connected up with a rod 32 for simultaneous operation, I prefer to unscrew and remove the thumb bolts 29, as shown in Fig. 4.

The thumb bolts 29 and the ears 30-30 are omitted from the burners in Fig. 4 since they are not needed when the burners are automatically controlled.

The advantages of my invention are manifold. Among them may be mentioned the following. Convenient and inexpensive mechanism is provided for correlating the gas and air supplies; so that the flame is maintained at a constant degree of richness which can be changed at any time by means of the adjustments provided to suit dierent characters of gas, &c. The multiple needle structure enables me to siphon a larger amount of air in to mingle with Vthe the use of a less quantity of gas than would be required in the case of a single needle valve. The gas .is also admitted in finer particles over the area of the mixing cham- Y ber, enabling me to obtain a more intimate mixture and therefore a more effective and powerful fuel. The pressure of the gas admitted through the plurality of the needle valves is greater than thatwith which gas from the same supplyV would enter the mixing chamber through a single needle valve of the combined area of my plurality of valves. The quickly and accurately adjusted. Y A battery of my burners can be conveniently operated in unison and may be automatically con-V trolled by the temperature in the furnace or boiler. This automatic control maybe applied to a single burner if desired. A

What I desire to claim is 1. In a gas burner containing a mixing chamber provided with air port-s and a Vgas gas by passage leading into the same, a shutter adapted to close said ports, a multiple needle valve in said passage, a common control for said shutter and saidA valve, whereby a predetermined ratio may be maintained between the gas and the air, and means for adjusting said control to vary said ratio.

2. In a gas burner, a multiple needle valve consisting of a perforated diaphragm interposed in the gas passage, a plate mounted in said passage to slide longitudinally thereof, needles mounted on said plate and engaging the perforations in said diaphragm, a stem provided with a notch extending axially from said plate, a rock shaft mounted without the gas passage, and an arm fixed to said rook shaft and extending through the wall of said gas passage and engaging the notoh in said stem,for the purpose described. 3. In a gas burner, a multiple needle valve consisting of a perforated diaphragm interposed in the gas passage, a plate mounted in said passage to slide longitudinally thereof, needles mounted on said plate and engaging the perforations in said diaphragm, a gas tight journal box communicating with said passage, and a rock shaft journaled in said box and operatively connected with said plate, whereby the passage of gas through said perforations may be controlled. 4f. In a gas burner containing a valve chamber and a mixing chamber which is provided with air ports through the wall thereof, a perforated diaphragm interposed between said chambers, a needle plate mounted to slide longitudinally in said valve chamber, needles mounted on said plate and engaging the perforations in said diaphragm, a shutter adapted to oover said air ports, and common operative means `for moving said needle plate and said shutter in unison, whereby a predetermined ratio between the quantities of gas and air admitted to said mixing Chamber is maintained.

5. In a gas burner containing a valve Chamber and a mixing Chamber which is provided with air ports through the wall thereof, a perforated diaphragm interposed between said chambers, a needle plate mounted to slide longitudinally in said valve chamber, needles mounted on said plate and engaging the perforations in said diaphragm, a gas tight journal box communicating with said valve chamber, a rook shaft mounted in said box, an arm rigidly attached to said shaft and extending into said valve chamber and connected to said needle plate, a shutter controlling said air ports, and operative connection between said rock shaft and said shutter, whereby said needle plate and said shutter are moved in unison and a predetermined ratio is maintained between the quantities of gas and air admitted to said mixing chamber.

6. A plurality of gas burners, each burner Containing a valve chamber and a mixing chamber provided with air ports through the wall thereof, a perforated diaphragm interposed between said valve chamber and said mixing chamber, a needle plate mounted to slide longitudinally in said valve chamber, needles mounted on said plate and engaging said perforations, a rock shaft, an arm rigidly mounted on said rock shaft and extending through the wall of said valve chamber and engaging said needle plate, a shutter adapted to close said air ports, operative connection between said rook shaft and said shutter whereby they move in unison, and common Controlling means operatively connected with the said operative connection on each burner whereby all of said burners may be operated in unison.

Signed at Pittsburgh, Pa., this 15th day of August, 1911.

JAMES B. ANDERSON.

Vitnesses:

E. A. LAWRENCE, Trios. E. FINLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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