US2047523A - Fuel lighter for furnaces - Google Patents

Description

July 14, 1936. D. H, scRANToN ET AL 2,047,523

FUEL LIGHTER FOR FURNACES Original Filed Fen. 9, 1929 4 2 Sheets-Sheet l ATTORN July M, 1936- D. H. scRAN-roN ET Al. 2,047,523

l FUEL .LIGHTER FOR FURNACES Y Original' Filed Feb. 9, 1929 2 Sheets-Sheet 2 ,f4/bur d( ATTORN Ys Patented July 14, 193s 'PAT-ENT oFFglcE 2,041.52: FUEL LIGHTER For. FUaNAcEs Donald H. Scranton, Budalo, and Raymond P. Moore, Kenmore? N. Y.

Application February 9, 1929, serial No. 338,650

- Renewed May V9, 1933 1iy claims. (ci. 15sesl This invent-ion relates to a device by means of which fuel may be ignited in a furnace or other place by projecting a member forwardly and causing a spark, after which the member may be withn drawn some distance. At the same time secondary fuel may be introduced through the lighter and ignitedand maintained for the desired length of time. The device may be controlled from a remote point and several of them may be con'' trolled at the same time.

The-invention will be understood from the description in connection with the accompanying drawings in which Fig. 1 is a. longitudinal section through an illustrative embodiment of the fuel lighter; Fig. 2 is a longitudinal section through some 4of the parts on an enlarged scale; Fig. 3 isV an end view of the device; Fig. 4 is a horizontal section through a portion of a furnace wall showing one of the devices in place near a burner; and

Fig. 5 is a somewhat diagrammatical view, show=l ing how a plurality of the devices .can be con.

trolled from a remote point.

1n the drawings reference character I indicates a hollow member, preferably cylindrically shaped, that is open at one end. A disc 2 is provided in the cylinder i and carries a piston 3 that is attached to the disc 2 in any convenient manner, so as to resist leakage of fluid past the disc when uidis admitted to the cylinder on the left hand side of the disc, as shown in Fig. l. A hollow pipe is attached to the disc 2 and consists of two sections It and 5 connected by a union 6. A burner or nozzle 5 is attached to the end of the section 5. rIwo flanges or fins 'l are connected to opposite sides of the section 5 and rest upon guide' rollers 8 pivoted on a shaft 8 near the open end of the cylinder l. Stationary guides 9 are attached to the cylinder l onopposite sides of the same and extend into positions along the upper sides of the flanges or fins 1.

An'annular ring or stop Il) for one end of a compression spring l l is provided in the cylinder l intermediate its ends. The other end of the spring I I rests against the disc 2. The section t is provided with a'n annular shoulder Al' andfis connected to the disc 2 by a nut I2 that is screwed onto the section 4 and draws the shoulder I thereof against a nut I3 that rests against the face of the disc 2. A threaded washer I4 is vscrewed upon the threaded end of'a sleeve Id' fitting tightly on the section 4 so that the washer it can be adjusted longitudinally. Pipes l5 and I t 'are connected to the cylinder I? on opposite sides of the disc 2.

An opening I1 is provided through the side of the cylinder I. An arm I8 of a mercoid switch extends through the opening l1 into a position to be struck by the washer I4. The switch is pivoted at I9 and is normally held against the stop 20 by- 5 means of the spring 2 I. The switch may be housed in a housing 22 on the cylinder I and the mercoid circuit closing switch member 23 ofV a well known type is tilted back and forth to close the circuit 24 in the primary side of a high ten- 10 sion transformer (not shown), one side of the secondary'of the transformer being grounded and the other side being connected to the contact ele.

`:tied by the section 5. the ends of the electrodes 2liv and 3d being spaced slightly apart near the outlet of the nozzle 5'.

The end of the cylinder l opposite the open end is closed by the disc 43l that is provided with a threaded opening 3?. into which a plug is screwed. A bracket @3 is attached to the disc 3l. A trip rod 3ft (Fig. 2) ior a valve at the endof the section l of the pipe vpasses thrdugh a hole 35 in the bracket 33 and is screwed into a nut 36 which is seated in a countersunk opening 3l in the bracket 33 to prevent the nut from turning. A valve 3B provided with a cap 39 that is screwed `to the 'et is screwed into the valve 38 and extends a considerable distance into the'section d. A spring stop dit is provided at the inner end of the pipe 4l and a compression spring le is interposed between the stop il@ and a stop 'iithat is attached to the valve seat te. l in Fig@ is shown a small portion of a furnace wall t@ having water wall tubes t9. Two of the water wall tubes as shown Iat 5l! are bent outwardly between which a burner 5I projects fuel to be burned in the furnace. The fuel lighter is indicated as being mounted in the housing 52 surrounding the burner 5i in such a position vthat when the section 5 is projected forwardly and a Vspark is caused the fuel will be lighted as will now be explained.

valve, is spring-pressed against the valve seat Il!) 35 through thel pipe I into thecylinder I whereupon the disc 2 and pipe 5 are forced to the right, as' seen, in Fig. 1. compressing the springV II. When the washer I4 strikes the switch arm I8 the primary side of the .transformer ,is closed, thereby nenergizing the contactl 25 with high potential current so that when contact is made between the spring 29 andthe contact 25 a spark is produced at the ends of the electrodes 21 and 36 in front of the nozzle 5. .When the disc 2 has been forced forwardly a sufficient distance to cause the cap 38 of the valve 38 to strike the head 42 of the valve trip rod 34, the valve 38 is stopped and any-further movement of the disc 2 and valve seat 46 will open the valve to permit the fuel to pass through the sections 4 and 5 of the pipe.

When the` fuel passes through the nozzle 5' it will be ignited by the spark at the ends of the electrodes 21 and 30, thus igniting the fuel entering through the burner 5I. The parts may be so adjusted that the spark maytake place between the electrodes 21 and 30 without any secondary fuel being introduced through the sections l and 5, thus directly igniting the fuel that enters through the burner 5I.

When it is desired to retract the electrodes the fluid pressure is relieved behind thev disc- 2, whereupon the spring II moves the parts to the retracted. position. As'soon as the valve seat 46 moves far enough to contact with the valve 38," the valve closes. During this time the expansion of the spring II forces the fluid back out through the pipe I5; Any uid that may have escaped by the piston 3 is drawn off through the 1 pipe I6. The combustible uid for projecting the electrodes forwardly may'be gas or oil, for example. y

Fig..-5 shows a somewhat diagrammatical arrangement of apparatus for operating a plurality of the fuel lighters from a distant point. Referlence character 55 indicates a tank or supply of oil, for example, that is maintained `under pressure. A pipe 56 provided with a check valve 51 leads to a three way valve 58 and may have branches 59 leading to corresponding three way valves for other lighters. A pipe leads from the three way valve 58 and has branches 60 leading into pipes I5 in the lighters already described.

Pipes 6I lead from the pipes I6v of the lighters to a tank 62. A pipe 63 also leads from the three way valve 58 to the tank 62. lA pipe 64 provided with a check valve 65 leads from the tank 62 to the tank 55.

' A pipe 66 leads from a source of compressed air (not shown) to the tank 55 and also to the three way valve 61. A valve 68 is provided in the pipe 66. A pipe 69 leads from the three way valve 61 to the tank 62 and a pipe 10 leads from the three way valve 61 to the atmosphere. The pipe 66 may be provided with one or more branches 1I leading to other fuel supply tanks.

'Ihe three wayv valves 58 and 61 may be so connected that they can be opened and closed simultaneously. When the valves 58 and 61 are turned to the positions indicated in Fig. 5 and the oil in the tank55 is placed under pressure by opening the valve 68, oil is forced through the pipe 56 and branches 60, thus projecting the fuell lighters forwardly to ignite the fuel in the furnace. At the same time whatever oil is in the tank 62 will drain by gravity into the tank 65, as the two tanks are at that time under the same pressure. When it is desired to retract the lighters, the valves 58 and 61 are turned to the other positions, whereupon the springs I I will retract By this invention the ignition ame can be introduced into a furnace automatically by an operator at a remote point, thereby making it safe for the operator to light the furnace; the ability to retract the nozzle avoids burning the same and also prevents carbonization of the oil to clog it up; the ignitionfame can be kept going whatever length of time is necessary. to insure ignition of the fuel in the furnace; a single operator can light a large number of, boilers; and oil, gas or powdered fuel can be ignited either by the spark or by means of the secondary fuel that is introduced with this device and ignited bythe spark. l i

We claim:

l. A fuel lighter comprising a cylinder having a stop, a piston for said cylinder, a spring between said stop and piston, a pipe attached to said piston, means to pass fuel through said pipe, a valve for said pipe which is opened at a predetermined position thereof, and means operated by movement of said piston to ignite vsaid fuel.

2. A fuel lighter comprising a cylinder having a stop, a'piston for said cylinder, a spring between ment of said piston to ignite said fuel, said last named means comprising an electric spark producing device.

3. A fuel lighter comprising a cylinder having a stop. a piston for said cylinder, a spring between said stop and piston, a pipe attached to said piston, means to pass fuel through said pipe, a valve for said pipe which is opened at a predetermined position thereof, a spring for closing said valve, and means operated by movement of said piston to ignite said fuel.

4. A fuel lighter comprising a cylinder having a stop, a piston for said cylinder, a spring between said stop and piston, a pipe attached to said piston, Ka valve at one end of said pipe, and means to produce an electric spark at the other end of said Dipe- 5. A fuel lighter comprising a cylinder having a stop, a piston for said cylinder. a spring between said stop andl piston, a pipe attached to said piston, a valve at one end of said pipe, a rod carried by said cylinder to open said valve, and means to produce an electric spark at the other end of said pipe.

6. A fuel lighter comprising a cylinder having a stop, a piston for said cylinder, a spring between* i' said stop and piston, a pipe attached to said piston, a valve at one end of said pipe, a rod carried ,by said cylinder and extending into said pipe to open said valve, and means to produce an electric(` spark at the other end of said pipe. u

7. In a device of the character/ described, a furand means correlated with said movable member accusa 3 to be rendered operative at a predetermined position thereof for igniting said ignition fuel. 8. In a device of the character described. a furnace, means for introducing fuel into said furnace', means for providing an ignition flame adjacent the point of introduction of said fuel, said last named means comprising a movable member through which lfuel is supplied for the ignition, means whereby said ignition fuel moves said movable member, and means correlated with said movable member to be rendered operative at a predetermined position thereof for igniting said ignition fuel.

9. In a device of the character described, a furnace, means for projecting fuel in fluid form into said furnace, means for providing an ignition flame adiacent the point of introduction of said. fuel, said last named means comprising a movable member through which fuel is supplied for the ignition, and means correlated withl said movable member to be rendered operative at a predetermined position thereof for ignitlng said ignition fuel.

10. In a furnace. a fluid fuel burner mounted to permit movement to and fro from said furnace comprising a fuel supply pipe biased from the furnace, means for feeding fuel vunder pressure to said burner, means actuated by the pressure of the fuel operable to move said fuel supply pipe toward said furnace, and means correlated with said pipe and rendered operative'at a predetermined position thereof to ignite the fuel delivered from said of the ignition 'i'uel to move into igniting relationship, and means correlated with said movable member and operable at a predetermined position thereof to ignite said ignition fuel.

DONALD H. SCRAN'I'ON RAYMOND P. MOORE.

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