US1880719A - Gas burner - Google Patents

Description

Oct. 4, 1932. G. w. BLAKESLEY GAS BURNER Filed Aug. 16.

1929 2 Sheets-Sheet "o T m V N A TTORNE Y Oct. 4, 1932.

G. w. BLAKESLEY GAS BURNER Filed Aug. 16. 1929 2 Sheets-Sheet A TTORNE Y center Patented Oct. 4, 1932 UNiT-Eo STATES.

enonen w. BLAKESLEY, or KANSAS crrY, mrssounr GAS BURNER Application filed August 16, 1929.. Serial No. 386,470.

My invention relates to gas burners, and

"more particularly to gas burners having means responsive to changes 1n temperature flow of air through the fire bowl synchro- "nonsly with setting up and suspending flow of gas to the burner, whereby air may be 1 available for promoting combustion of gas.

in the firebowl and moving products of cornbustion, and the flow of air will be cut off when the fuel supply is cut oil to prevent extinction of the pilot light.

In accomplishing these and other objects of the invention,I have provided improved details of structure, thepreferred forms of which are illustrated in the accompanying drawings, wherein Fig. 1 is. a vertical central section from front to back through the lower portion of a furnace equipped with my improved burner and draft control mechanism. V

i Fig. 2 is a fragmentary'perspective view of the draft control mechanism, a housing wall being partly broken away to show the position of a fuel mixture conduit.

Fig. 3 is a plan View of the burner and control mechanism,-sections of the burner and a cover for the control mechanism being removed, and the upper housing wall being broken away for better illustration of details of construction. v

Fig. 4 is a section on theline H, Fig; 3. F ig.5 i'sa section on the line 55, Fig. 4. Fig. 6 is a vertical transverse section of the of the burner, one fuel inlet nipple being removed and the other, partly broken,

away. Referring in detail to the drawings: 1 designates a furnace including a fire bowl 2 having vertical walls 3 forming a chamber 4, an ash pit 5 having a door opening 6, and

an annular flange. .7 around an opening 8 affording communication between the fire bowl chamber and the ash pit.

Mounted in the ash pit with its outer end projecting from the ash pit door is a housing. 9 later described, through which anair draft inlet conduit 10, fuel mixture pipes 11 and 12,

and a pilot light tube 13 extend toward the Mounted on the upwardly turned inner end. 14 of the air conduit 10 is an annular base or header comprising a pair of mated similar semi-circular'castings 15 and 16 having concave web portions 17 provided with flanges 18 adapted to engage'the conduit and form an axial opening in the base registering with the end of the conduit when the base members are mounted thereon. Vertical cars 19 on the webs are adapted to receive bolts 20 for securing the base members together.

The base members have hollow peripheral portions forming chambers 21, and each has a gas inlet opening 22 into which the'inner ends of corresponding fuel pipes 11 and 12 are connected. Each base member has a plu rality of nipples or nozzles 23 formed in upwardly projecting bosses 21 arranged in rings adjacent its outer edge and communicating with thecha nber 21. i

A cover member 2 5 mounted on each base" member has openings 26 registering with the nozzles 28 and an arcuate groove 27 to receive deflecting members 28 presently de scribed. The covers have depending peripherally flaring flanges 29 shaped to form shoulders for engaging shouldered outer edge portions of the base me1nbers, whereby the covers ares'upported in spaced relation with the nozzlebosses forad'mitting air to the inner edge of the cover member may. interlockingly engage ad acent edges of the other 3 member for effecting the connection thereof.

The deflecting members 28 comorlse narrow slabs of refractory material mounted ons end in the grooves 27 in inclined position and in edge'abutting relation to form a closed howl-like frusto-conical deflector adapted to deflect gases moving from the base opening toward the fire bowl walls.

The inclination of the deflecting members is preferably conferred by forming the inclined groove floors, and the central portions of the covers are depressed to form a flector when the covers are connected.

The deflecting'members 28 are preferably assembled in sections, for example four equal sections each comprising a number of members attached to an upstanding outer edge flange 31 of a quadrant sectorplate 32 by bolts 33. The sectors 32 are. provided with perforate ears 34Eon inneredges to receive bolts. for securing the several sections together and forming a partition in the deflector intermediate the upper and lower ends thereof.

The upper! end of the deflector preferably extends in sli htly spaced relation with the walls of the fire bowl to formthe reduced annular outlet end of an annular upwardly contracted chamber or channel-35 for gases moving from the base toward the smoke outlet of the furnace. Y

Sealing means 36, for example a body of asbestos is installed on the flange '1' between the periphery of the base and the fire bowl to prevent entrance of air to the channel 35 otherwise than through the openings of the cover members. V 1

The apparatus further includes a constant ly burning pilot burner or light 37 in the channel 35 fed through the tube 13 extending intov and through the housing.

An apertured partition 39in the housing ,defines an open-top housing chamber 10erterror to the furnace, havlng a. front or end wall ll provided withdraft inlet openings .42. V The pilot burner tube 13 extends through an aperture 43 in the partition and is connected by a valved fitting .44 to a tube 45 leading from the gas supply line and sup-' plied with gas under relatively constant pressure. 3 1

The fuel mixture pipes. 11 and 12: have flaring outerends46 abutting the inner face of the partition. around air ports' .4;,7 thereln, and forming funnel-like mixingchambers 48.

" Nipples 49 mounted on the partition in a cen .tral position with reference to the ports support air control valves or disks 50 sleeved thereon and receive the inner ends of valved fittings 51 having outer ends communicating with a header 52 connected with an auto- 55 in the partition for communication with the housing chamber 40 for delivering a draft between the upper surface of the hollow base Y portions and the cover members to the gases moving from the nozzles toward and through the openings of the cover members.

. A damper 56 for controlling the draft is pivotally supported at the outer end of the air conduit by av shaft .57, mountedincars concave closed bottomfor the bowl-like del prolecti'ng from the partition crank ing wall and is provided with a slot in its opposite end in which a laterally bent end of the crank arm 59 is slidably retained.

. Force is applied as later described to an intermediate portion of the link for lifting the damper. r

The. regulating device may include a housin 62, and may be electrically operated, as

in icatedby switch contact posts 63- projectingfrom the housing, and in accordance with well known practiceto control the valve 53 V for setting up and suspending flow of gas to wardthe burner. 7 v

I combine with the gas-controlling feature of the device, means for synchronously controlling the movement of air through theconduit 10, including a levenarm 64 having one end pivotally mounted in ears 65 of a base 66 secured to. the upper face of the housing-62 adjacent the outer edge thereof, and connected with the link 60 through an adjustable link 68. The arm is vertically pivotal; ina path above the shaft 67 normally present in lUO llO

regulating devices of the type shown for operating the valve 53. The shaft moving upwardly for opening the valve 53 encounters the arm 64 and lifts the same, thus effecting opening pivotal movement of the damper to permit air to move through the conduit 10..

' The damper is provided with a weight 69 tending to move the damper toclosingposition. When the shaft 67 moves downwardly for closing the 'Valve153j the damper is permitted to move toward; conduit-closing-position and retracts the arm 64 for retarding the I same in position-tobe lifted by the-shaft.

The housing 9- further preferably comprises an inner portion extending in the ash l pit with: its outer end, engaged in the ash pit door opening, and an outer portion ineluding side walls provided with vertical edge flanges 71, a bottom 72having peripheral flanges 73, and a cover member 7 4 having flanges 7 5. The partition comprises a plate provided with inwardly projecting horizontal flanges 76 adapted to engage the inner face of the outer end of the inner housing portion and spaced from the edges of the plate to leave keeper-like stop portions engage able by the flanges of the cover and bottom.

The partition platefurther has ofi'set vertical edge portions 7 7 forming grooves to receive the inner vertical flanges 71 of the side walls. The end wall 41 also comprises a plate similar to the partition, having offset vertical edge portions 78 adapted to receive the outer vertical edge flanges of the side walls.

The partition and end wall 41 may have slotted ears? 9 to receive fastening means for securin the cover to the housing. The cover preferibly has an opening 80 for access to the manually operable valves, and a door 81 may be mounted over the opening and attached to the cover for preventing unauthorized access to the housing.

The regulating apparatus may include a handle 82 for manually opening and closing the valve 53.

The housing construction described is particularly adapted for forming the inner housing portion of relatively light weight material, for example sheet metal, and forming the outer housing portion and partition of cast plates which may be easily assembled to enclose the valves and fittings illustrated. The outer housing portion is therefore rela tively sturdy, and provides protection to the valves and damper against accidental damage and molestation.

In using apparatus constructed as de-' scribed, the pilot flame is constantly operating to ignite gas delivered to the channel Then a gas mixture is being delivered to the channel, the fire bowl and deflector are heated, and a draft or stream of air flows through the outer housing portion, conduit 10, and-cover openings into the channel and outwardly from the furnace.

V'Vhen flow of fuel mixture is suspended the heated fire bowl tends to sustain the flow of air which if permitted to continue would tend to extinguish the pilot flame and cool the fire bowl and deflector.

The damper 56 however is held in open position by the device which controls flow of fuel, and when fuel flow is suspended the damper is released and automatically moves to draft-stopping position.

When fuel flow is set up again, by opening the valve 53, the damper-control members are synchronously operated to permit flow of ir through the burner and fire bowl.

What I claim and desire to secure by Letters Patent is:

1. In apparatus of the character described,

including a fuel mixture conduit, a secondary air supply conduit, and valves controlling flow of fuel mixture and air through said conduits, a housing including an apertured plate'engagin 'the outer .ends of said condults, SiI'iCl housing enclosing the valves and :including removable side wallsand a perforate end wall. I

2. .In apparatus of the character described, a furnace including an ash pit having a door opening, a burner, a fuel conduit, an air con- 't, valves for controlling flow of fuel and .air thrcugh said conduits, a housing-incantduit, a crank for operating the damper, a 9

link pivot-ally mounted on the housing havin a slot to receive said crank, a second link having pivotal connection with said first named link, and means controlling flow of fuel through means for operating said second named link to effect operation of the damper.

l. In a gas'burner having a door opening a plurality of conduits having outer ends lo cated in said opening, a plate closing said.

opening and having apertures to receive said outer ends of the conduits, a housing including side walls removably engaged with said plate and an end wall removably engaged with saidside walls and having apertures,

for inlet of air to the housing, and means including valves located in the housing for cont-rollmg movement of fluids to said conduits. I

said fuel inlet conduit having 5. In apparatus of the character described,

a burner, air and gas conduits connected with the burner, a tubular housing enclosing said conduits, a partitlon 1n the housing supporting the ends of said conduits and forming an air chamber at the end of said housing,

an apertured plate closing the end of the' housing, a valve in the housing closing the air conduit, automatically operable means associated W bh the housingvfor controlling flow of gas through the gas conduit, and

means interconnecting said air valve with said gas control means arranged to shut off the air'supply from said air chamber when the gas control means operates to shut off flow of gas through the gas conduits.

6. In apparatus of the character described a burner, air and gas conduits connected with the burner, a tubular housing enclosingsaid conduits, a partition in the housing supporting the ends of said conduits and forming an "air chamber 'at the end ofsa-id housing an apertured-plate associated With the air chamher portion of the housing, a vvalve in the housing closing the air conduit, automaticah 7 1yoperable means associated with the lionsmg for controlling flow of gas through the 7 gas conduit, and meansinterconnecting said all valve with sald gas, control means arranged to shut off the air supply from said 7 air chamber when the gas control means 0perates to shut ofiflow of gas through the gas conduits. y

In testimony whereof I afiix my signature.

GEORGE W. BLAKESLEY.

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