US2340167A

US2340167A - Lighter for gas burners

Info

Publication number: US2340167A
Application number: US393705A
Authority: US
Inventors: Henry F Alfery
Original assignee: Milwaukee Gas Specialty Co
Current assignee: Milwaukee Gas Specialty Co
Priority date: 1940-08-31
Filing date: 1941-05-16
Publication date: 1944-01-25
Anticipated expiration: 1961-01-25

Description

LIGHTER FR GAS BURNERS Onriginal Filed Aug. 31, ).940

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v v ya., if y 4 `each tube being improved construction,

Patented Jan. 205, 1944 waukee Gas Milwaukee, Wis., Specialty Company, Milwaukee,

assignor to Mil- Wis.. a corporation of Wisconsin Original application An 354;'963. Divided 1941, Serial No.

3 Claims.

This invention relates to lighters for gas burners and has to do particularly with automatic lighters of the type in which there is a pilot burner provided with a torch hood having flash tubes leading to the respective main burners, adapted when the burner is turned'on to convey gas to the pilot burner where it is ignited and the resulting flame flashed back through the tube to light the main burner.

The present application is a division of .my

lust 31, 1940, Serial No.l and this 393,705

application May 16.

(ci. s-115) the torch hood.

copending application Serial No. 354,963, filed August 31, 1940.

One of the main objects of the invention is' to provide a lighter of simple, inexpensive and and embodying a fuel supply tube for the lighter, having a laterally opening port in the wall tip being secured to this tube over the port therein, with the interior of the tip positioned to receive fuel from the tube through said port, and preferably with the base of the tip separated from the tube along a portion thereof vfor the admission of air to said tip. i

Itis also an object of the invention to provide a simple, inexpensive, and improved mounting of the torch hood on the lighter tube, and particularly an improved mounting in which the lighter tube extends through an opening in the side of the hood and has its outer end flattened together to close the outer end of the tube, with the attened end of the tube projecting through an opening in the opposite side of the hood, the projecting flattened end of the tube being prefof the hood along the tube.

Further objects and advantages of the invention will appear from the following detailed description, taken in connection with the accompanying drawing in which:

Figure 1 is a perspective view of a lighter embodying my present invention;

Figure 2 is a fragmentary vertical section on an enlarged scale through the torch hood. of the lighter taken substantially on the line 2-2'0! Figure 1;

Figure 3 is a vertical section through the lighter tube and pilot tip, taken on the line 3-3 of Figure 2; A

Figure 4 is a sectional View through the pilot adjustment valve between the main fuel supply pipe or manifold and the lighter tube; and

Figure 5 is a vertical section taken dinally through one of the lighter showing the injection tip at the outer tubes and end of the thereof, the puoi burner longitufeed pipe (not shown) to which A in the usual way at the end nearest the mani- -relative to the burner II.

air is admitted Referring now .usual fuel supply cated at I 0. The mentarily at Il in Figure 1, fed with' fuel from the manifold fold.

The lighteris provided in appropriate position This lighter comprises Y'a 'lighter tube I2 connected to the manifold i0 erably turned laterally to ,prevent displacement tube and the adjustable and detachable 'con- 68 by the pilot adjusting valve I3, The lighter tube I2 leads to the pilot tip I4 which is positioned at an appropriate distance from the burner II. Although only one burner is shown, it is of course understood that gas ranges for example, embody a number of burners-usually four-'and the pilot tip I4 with its torch hood, to be presently described,'are disposed centrally between these circularly arranged burners.

The tube I2 extends through an opening I5 in one side of the wall of the small, compact, annular torch hood I6, and the outer end of the wall of the tube I2 is attened together at Il to close the outer end of the tube, providing a hat oblong terminal element therefor having its longer axis extending horizontally. The outer attened end I1 projects through a correspondlngly shaped opening I8 in the opposite side of the hood I6, and the projecting flattened end of the tube is (Figure 2) to prevent displacement of the hood I6 from the outer end of the tube I In positions substantially centrallywthin the annular wall of the hood I6 the top of the tube I2 has a laterally opening port 20. The pilot tip I6 is shown as comprising an outertip part 2i and an inner tipl part 22 having its base secured at 23 to the outer tip part. The inner tip part 22 is of Venturi-like character and is protected by the outer tip part from the heat of the llame which is dashed through the tube to eliminate gum deposits and clogging of the tip. The resulting tip is also wind-proof, i. e., it is of such a character that the pilot will not be accidentally blown out by blasts of air. The top of the inner tip part 22 terminates short of the top of the outer tip part 2l to deliver the fuel into the outer tip part and this outer tip part has a plurality of equally spaced ports 25, one, for example, for each of the ash tubes of the lighter.

AThe base of the outer tip part is shown as inner end of the tube and preferably turned laterally at I8 ilanged outwardly at 28. spot-welded at 21 or otherwise suitably secured to the tube l2 on opposite sides of the port 20. The base of the pilot tip is separated from the tube I2 along the intermediate portion adjacent the port 20 for the admission of air, as shown at 28 in Figure 3. The resulting pilot burner is of the character of a Bunsen burner, and the pilot burns with a blue name.

Each flash tube-four of these tubes being shown in the drawing-comprises an outer extension tube 30 and an inner swivel tube 3l telescoping over the outer tube. The outer end of the tube' 30 has an injection tip 32 spot-welded at 33 (Figure 5) or otherwise suitably secured to the tube. The tip 32, nt in an opening 34 in the burner Il as shown in Figure 1, has a lateral port 35 for delivering fuel from the burner Il, when the burner is turned on, into the ilash tube through an opening 36 in the tube 30 adjacent the port 35. The gas or other fuel thusdelivered into the flash tube is conveyed through this tube to the pilot light where it is ignited, and the ilame flashes back through the tube and ignites the burner. The. telescoping engagement between the

tubes

30 and 3| permits adjustment of the injection tip 32 radially with respect to the torch hood. The outer end of each tube 30 is preferably open at 38.

The circular wall of the hood i6 has an inturned annular retention flange 40 at its upper end, and the bottom of each tube 3| at its inner end has a generally transversely extending slot 42 which, by tilting the outerend of the flash tube upwardly as the device is viewed in Figure 2, is adapted to pass over the ange 40. The opposite ends of the slot 42 are directed generally longitudinally, or the slot is otherwise shaped to form a retention lip 45 along one edge of the slot for interlocking engagement with the ange 40 when the tube is placed in operating position. In its operating position, the flash tube is supported on the the torch hood and is held detachably in place by its interlocking engagement with the flange. The resulting connection between the flash tube and the torch hood is of simple, inexpensive, and improved character, and permits not only easy removal of the ash tube for cleaning, but also permits movement of the tube slidingly around the annular flange to different positions about the periphery of the hood so that the as'h tube may be disposed in any desired radial position. Moreover, the ilange and slot connection between andthisbaseflangeis the fiash tube and the torch hood permits swiveling or swinging movement of the tube in a vertical plane extending substantially through the axis of the hood to raise and lower the injection tip 32 at the outer end of the flash tube to any desired position.

The pilot adjusting valve i3 comprises a valve body threaded into the pipe or manifold l and which is adapted to.

provided with an inlet 33 leading from the manitold il, and an outlet 5l leading to the tube I2 which is secured to the valve body by a coupling nut 52. A passage 53 is provided between the inlet 60 and the outlet 5I. and a valve screw il threaded in the valve body is adapted to be turned to adjust the communication between the inlet and the outlet, and thereby the pilot flame. The inner end of the valve screw 54 preferably has a V-shaped notch 56 or its otherwise formed in a manner to eliminate gum deposits and clogging of the pilot adjusting valve. A nut 53 is preferably provided for locking the adjusting screw 54 in adjusted position.

I do not intend to be limitedto the 'precise details shown or described.

1. In a lighter of the class described, a pilot burner, a hood therefor having an opening in one side terminating above its lower edge, and a fuel supply tube for said burner extending through said opening having its end flattened flange 40 at the upper end of and thereby closed providing a fiat substantially oblong terminal element with its longer axis extending horizontally, said hood having an opening in its opposite side terminating above its lower edge substantially conforming to said terminal element, said terminal element projecting through the latter .opening and being bent at an angle at the outer face of said hood, said terminal element cooperating with the body portion of said tube and with said hood for coniining the latter against relative movement vertically and lengthwise of said tube in either direction.

2. In a lighter of the class described, a hood having openings in its opposite sides, a fuelsupply tube extending through said openings supporting said hood and p rovided with a port opening through its wall within said hood, and a pilot tip seating on said tube over said port to receive fuel therefrom, said tip being secured to said tube at points spaced apart lengthwise thereof and being spaced from said tube between said points providing space for admission of air.

3. A pilottip assembly for use in a lighter of the flash tube type comprising a hood, a pilot tip within the hood, ash tubes leading from said hood and tip, and a tube for supplying fuel to said burner having a fuel outlet port; said tip comprising an outer member having ports at its upper end to be disposed adjacent the ends of the iiash tubes, and an inner member of less height than and disposed in concentric spaced relation tosaid outer member, said inner member having a base flange closing the lower end of the space betweerf said inner and outer members, said ange being inclined downward and outward of said inner member and defining an upwardly and inwardiy tapering fuel and air mixture inlet adapted to overlie the fuel outlet port of the fuel supply tube.

HENRY F. ALFERY.