US1711436A - Gas-supply control for oil burners - Google Patents

Description

April 30, 1929. w. w. WILLIAMS l GAS SUPPLY CONTROL FOR OIL BURNERS Filed July 31.4 1922 .50 necting pipe leading WALTER W. WILLIAMS,

or BLooMING'roN,

PATENT orrlcr.. y

ILLINOIS, ASSIGNOR TO WILLIAMS OIL- O-MATIC HEATING CORPORATION, OF BLOOMINGTON, ILLINOIS, A CORPORATION OI?I ILLINOIS.

Application led July 31,

This invention relates to oil burners. The invention has special reference to ,a control for gas supply and means for igniting the gas in connection with oil burners.

For information with respect to oil burners and particularly with respect to the type to which this device is applied,-reference is made to applicants patent bearing No. 1,451,798', dated April 17, 1923, wherein ap- ]o pears detailed showing and description of essential parts of an oil burner of the class to which this device is tofbe applied.

The invention is related to an oil burner wherein an extraneous gas supply is utilized for ignition of atomized fuel oil generated through the action of the machine, active to develop the fuel mixture.

The invention consists in the intel-position of a control devicel for governing thesnpply 2o of such extraneous gas, whereby the minimum of such supply is used to effect proper ignition of the fuel atomized fuel oil.

The invention also includes the relationing of the extraneous gas control to the normal working parts of a fuel burner. r

Referring to the drawings, Figure 1is a Verticalview, partly'in detailed structural parts of an extraneous gas control mechanism.

Figure 2, is aplan view of the structure shown in `liigure 1.

Figure 3, is a detail view of means relating to an electrical connection related to the gas' control means.

Figure 4, is adetail view, partly in section, ot4 a tension'ed valve and the relationing of the same to a gas inlet and outlet housing or container that is associated with the gas control means and,

Figure 5, is, in part,a side elevation, part in section showing an oil burner with the 4gas control means associ ted therewith, and in part, a diagrammatic showing of current producing and electrical connections, func- 5 tioning in connection with the operation of the oil burner and the gas control means.

p Figure 6 is a fragmentary enlarged detail View of the connection of the pressure transmission member adapted to receive the confrom the source of pressure.

In connection with the device referred to 4in the above me4 tioned application, a con- V stantly burning pilot light is shown as a 55 means of ignition of the'fuel mixture, de-

sectlon showing the .the purpose of GAS-snrrLY coN'rRoL ron ont. miennes.

1922. Seri-al No. 578,618.

veloped as a result of the operation of the so-called burner mechanism.

Experience with this character of ignition has demonstrated that quiteva considerable constant gas flame is required in order that it he maintained against extinguishment through draft or otherwise, thereby resulting 1n quite a large cost for such constant gas supply. The present conception of control of such gas supply is directed to a reduction of such cost to the minimum. iThis is accomplished by a control of the gas supply that will effect a mere temporary supply of ignition gas at the moment only of starting the fuel atomized oil generator. 7o t In the drawings, A indicates a motor housing. .B a fan housing. Cla blast pipe that communicates with a heating unit (not shown). l) refers to a compression pump housing, said pump being'active, as explained 1u my pending application Serial No. 415,501, to develop pressure upon a fluid and air mixture preliminary to discharge to a burner pipe E which also communicates with thc heater unit. Electrical connections are shown from a spark coil to a motor and to other functioning essentials to the operation of the burner that are referred to especially in connection with my pending application, but'as no claims are h'erein'beingmade for these features, no special reference will be made to them.

Referring generally to my present invention, 10, indicates a valve housing providedwith a bottom closure member 11, fashioned with an upwardly extending centering pin 12', and with a' centrally perforated medially disposed diaphragm member 13, also with gas inlet and outlet ways 14 and 15, respec tively. 16, is a longitudinally centrally perforated top closure member, adapted for threaded union with the valve housing an provided with depending portion 17.

, A. valve is related'tol the valve housing for re ulating-flow ofgas there- 100 through, said va ve comprising a stem 18, centered for vertical movement within the cap member 16, and the tapered valve head 19,

the latter adapted for seating `in connection with opening 20, in diaphragm member 13, of the valve housing and the shouldered centering member 21. 22, is a coiled spring tension member, centered, its opposed ends respectively, in connectionwrh centering pin 12 on bottom closure membe 11, and center- 110,

lpivoted a suppl ing member 21 on the valve stem, said spring being of such length as to eect a normal closure of the valve head 19, in connection with the diaphragm opening 20, but yieldable Aunder force applied to the valve stem, to effect opening of the valve to permit'gas to pass through for deliveryto an ignition point as will hereinafter be explained.

eferring now to means for actuating the gas control valve, 23 and 24 are circular skeleton framing members, adapted to be united by means of bolt and nut members 25, each provided with cross framing members 26 and 27, and framing memberV 23, with laterally extending supporting members 28 and 29, the latter each fashioned with aV vertically, centrally, disposed seating opening. Within the framing there is adapted to be supported, the pressure transmission member which is referred to generally as 30, the same being a walled compartment in drum shaped form, preferably fashioned from corrugated metal as copper. At the axial center of the bottom wall of the pressure transmission member is provided a perforation 31 and about said opening and ldepending therefrom is provided a pipe 32, in register with opening 31 and exteriorly threaded and provided with the shouldered portion 33, said pipe being adapted for seating within the opening 34 in the bottom cross framing members 26 and 35, is a nut, adapted to be applied to the pipe for securing the pressure transmission member in connection with the supporting frame structure. A thrust pin 36 is centrally disposed and attached to the top wall of the compression chamber and is adapted, through expansion of said flexible top wall, to be projected upwardly for the purpose of actuating a valve operating member. 37, is a lever pivoted upon a bifurcated seating member 38, as at 39. To the forward end of the lever is movement transmission member, referred to generally as 40, the same being fashioned at its upper end with a forwardly extending stop lug portion 41, the transmission member being generally related to lever 37 in a manner to sustain it in proper relationship with reference to valve stem 18, that, when the forward end of the lever is 'depressed, the transmission member will engage said valve stem. The lower end of the transmission member is provided with an extended foot piece 42, which serves, when the lever is epressed, to apply downward pressure and thrust action to the valve member through the ementary action of pin member 43, secured to the framing extension member 28. 1e relationing of the transmission member to the valve stem and stationary pin being such, that when the lever is depressed, the foot piece contacts both with the valve stem and pin and under the co-operative action of the stationary pin, the pressure member is held in position to apply pressure to the valve stem and at the same time to effect a clearancemovement of said foot piece from the valve stem, which movement continues until the transmission member 40 has wardly advanced, through a turning movement of the transmission member, upon its pivotal support, until it is dislodged from contact with the valve stem, whereby the latter is projected upwardly through the action of spring member 22, effecting a reseating of valve member 19 in the clearance opening 20, in diaphragm 13, thereby shutting olf the supply of extraneous gas.

The valve actuation, to admit a measured supply'of gas through the gas admission valve, is designed to be subject to such control that will cause a gradual timed opening of the valve that will permit a flow of gas through the valve for a period of about twenty seconds and to that end a resistance is interposed against the thrust action of pin 36, which operates the lever 37 so that its action in raising said lever will be gradual. I have provided a dashpot for effecting' thc required resistance to the action of thrust pin 3G, which, in principle, operates as the ordinarydashpot. Thedashpotcomprises the cylindrical container member 44, the bottom closure member 45, and the top closure mem ber 4G, the latter having a threaded relation with container 44.,.said container being fashfrom framing member 23. The container an inlet Way 47. 48 is an inlet valve provided with a cap closure 4S), whereby oil may be introduced into the container. i

Within container 44, a signed through a central opening in top closure cap head 54, provided with perforations 55. the plunger head is integrally united circular wall portion '56a of a cup 56, the latter being dimensioned for close sliding fit within the container. 57, is a perforated disc loosely supported in clearance relation upon plunger 53 to permit it to move up and down thereon, the same being dimensioned to afford a small amount of clearance between its periphery and the inner is a pin supported in a transverse perforation in the plunger at a spaced distance from the plunger head and active to' limit the upward movement of said disc; The normal positioning of the parts of the dashpot are those shown in solid lines. Oil having been deposited.with the container, force applied to raise the plunger 53 will be against the resistance of the oil Within the dashpot, there being a gradual escape of oil from cup 56 during such raising action and While the cup is in elevated position, through perforation 5 5 in plunger hea'` 54, so that eventually,

the

been forwall of the cup. 59

through the lapse ofa suicientperiod of time, all of the oil will have passed from the chamber above the plunger head into the bottom of the container. Connection is made between the rear end of lever 37 with plunger 53 by entry of the latter through clearance opening 60 in said lever and through the provision of take-up-nuts 61 and 62, the same being relatively spaced, as may be desired, to accommodate the desired length of active movement of said plunger. Lever 37 having been raised to the position shown in dotted lines in Figure 1, while the motor is in operation effecting and maintaining thrustaction of pin 36, upon cessation of such motor action and attendant retraction of said pin, spring will act to =return plunger member with the seating of the plunger head54 upon the bottom of the container and during such downward thrust movement the loil in the bottom of the container passing back into the cup 56, will act to raise disc member 57, within the limit defined by stop pin 59, thereby rendering a comparatively easy return of the oil to the cup and container portion above the plunger head.` In the operation of the device, when the thrust pin 36 is projected upwardly to actuate lever 37, the action of the pin is measurably resisted by the dashpot so that suclrprojection movement is made gradual.

In the normal arrangement of the valve control mechanism, lever 37 is held in the position shown in solid lilies in Figure 1(the gas control valve being closed) under the tension of coiled spring member 50, interposed between extension member 51 on one of the pivot seating members 38 and the lug 52 positioned on the forward end of the lever 37. Under the projection action of thrust pin 36, lever 37, will be raised against theftension of the dashpot until it reaches the position shown in dotted lines in Figure 1, or until it shall have, in its movement, eected a gradual depression of the valve stem to admit the required gas supply and thereafter a release of the same to permit closure of the valve and will be maintained in such position until such pressure is released and thrust pin 36 is retracted in relief of the lever. Upon such pressure relief, lever 37 under the tension of spring 50, will be returned to its normal positioning as shown in solid lines in Fig- Vure 1, acting against measured resistance of the dashpot, such return being eected without, in any wise, acting upon valve stem 18.

The pressure to actuate thrust-pin 36 originates in pump D, air pressure from said pump being transmited through connecting pipe 63 to the interior of pressure transmission chamber 30, which, in turn, acts upon the upper wall thereof to extend it thereby effecting projection of thrust member 36 against.

lever 37.

53 to its normal position A fuel supply pipe 64 is shown that, in ractice, is designed to discharge fuel, generated by the burner mechanism, from its tip or end portion 65 into a combustion chamber (not shown) .and it is the purpose'of my device to furnish ignition means for said fuel supply.

Referring to the course of the extraneous gas supply, 58, is a gas pipe from a supply source communicating through opening 14 in housing 10, of the gas valve at a point below diaphragm member 13 therein, said gas passing through said valve under the control hereinbefore indicated and therefrom through the connections 67 and 67a to a lead pipe 66, the forward end of which discharges in proximity to the deflector plate 68 overlying the forward end of fuel supply pipe 64. The gas is purposed to be ignited by an electric spark and to this end an electrical connection is provided from spark coil 69 to a point `in proximity to the discharge end of the gas supply tube, comprising a small rod member 70, supported sulator bracket member 71 upon the fuel supply pipe and the wiring connection 72, between said spark coil 69 and said rod member. To complete the electrical circuit, connection is made through conductor 73 with the contact points 74 supported in insulated relationship with frame portion 23, whereby, when lever 37 lies between and -in contact with said contact points an electrical circuit will be established and a jump-spark produced across the space betweenthe terminal ends, respectively, of the extraneous supply pipe 66 and the sparking wire 70. The contact relationship between contact points 74 and lever 37 is such that, when the motor has been started and pressure is produced to project thrust pin 36 upwardly and in such thrust action effecting a raising of lever 37, the electrical contact is made to continue until valve stem 18, shall have been sufficiently depressed to` admit the necessary measured supply ofgas and for its advancement under normal gas pressure, to the discharge point from gas feed pipe 58 and into position to be ignited by the then active electrical current, through the medium of the jump-spark, but releasable from such contact, immediatel upon the tilting of said lever 37 far enougli to effect a release of the valve stem 18, Whereby the latter is closed. 'Ihe braking of the electrical circuit will discontinue the jumpspark during the period that the motor is 1n action, but upon termination of such action, lever 37 willbe returned in the manner hereinbefre explained, into seated relation with the contact points 74 in readiness for service in reestablishing the temporary jump-spark circuit upon the motor being again started for the purpose of producing fuel atomized oil. What I claim 1s:

1. In an oil burner, in combination, fuel atomizing means, including a pressure pump, conductor means for the fuel communicating with the atomizing means, an auxiliary gas conducting means discharging in proximity to the discharge point of the fuel atomizing means, a control valve interposed in said auX- iliary gas conductorlmcans, means responsive to the pressure created by the pump for actuating said valve for momentarily opening the same including a lever and a member thereon, operated by a movement of said lever t0 actuate said valve for temporary opening and thereafter for releasing said valve to permit it to close, a jump-spark circuit, including means coacting with the valve operating means for momentarily establishing the jump-spark auxiliary gas supply.

2. 'In an oil burner, in combination, a fuel atomizing means, including a pressure pump, a conduit for supplying fuel to said atomizing means, an auxiliary gas conductor means discharging adjacent said atomizing means, a control valve interposed therein, comprising a housing having two chambers communicating respectively with inlet and outlet members of the conductor means, a passage between said chambers and a valve adapted normallyfor effecting closure of the passage between said chambers, a lever for actuating said valve, including a member connected therewith for temporarily opening thev same and thereafter releasing it by a unidirectional movement of said lever, means for actuating said lever responsive to the pressure created by the pump and a jumpspark circuit including means co-acting with the valve operating means for momentarily establishing the jump-spark circuit to effect 4ignition of the auxiliary gas supply, including an energizing connection between a .c1r-

cuit connection and the valve operating leverclosed when the lever is in its normal position, but operable through the movement of the lever to., operate the gas control valve to interrupt the circuit, whereby during the interval of the movement of thelever to effect a temporaryrflow of the auxlliary gas supply and, during the period of such fiow, curcircuit to effect ignition of the rent will be effective to ignite such gas "supply and thereafter will be discontinued after such ignition has been effected.

3. In a fuel burner, in combination, fuel atomizinr means, a conductor for discharge of such uel to a heater, auxiliary gas conductor means adapted to discharge in proximity to the discharge point of the fuel mixture, valve control means interposed in the auxiliary gas conductor means normally active for closure thereof, means to operate said valve including alever, to first open and then allow said valve to close by a continuous movement of said lever, and a jump-spark circuit including a spark gap positioned at the discharge point of the fuel and auxiliary gas conduit to effect ignition of the auxiliary gas supply. f

n oil burner comprising a fuel nozzle, a pilot light therefor, means for feeding atomized fuel to the nozzle, a fan for producing an air current about the nozzle, a terminal adjacent the nozzle, a motor for driving the fan, connections to said terminal for creating a spark to ignite the pilot light when the motor starts running, a source of fuel for the lpilot light, means operated by said atomized fuel feeding means for introducing the fuel supply to the pilot light and for immediately thereafter breaking the circuit to the spark, substantially as set forth.

f 5.Y An oil burner comprising a fuel nozzle, a pilot light therefor, means for feeding atomized fuel to the nozzle, a fan for producing anvair currentaboutthe nozzle, an electric terminal adjacent the nozzle, a motor for driving the fan, connections to said terminal for creating a spark to ignite the pilot light when the motor starts ruiming, a pipe supplying the pilot light with fuel, a valve in said pipe, a lever operating said valve an electric switch connected to the lever, and a diaphragm yand dashpot actuated by the pressure of said fuel feeding means for moving the lever to open said valve and then open said switch, substantially as set forth.

In testimony whereof I affix my signature.

- WALTER w. WILLIAMS.

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