US1260741A - Torch. - Google Patents

Description

A. J. ARCHA'MBAULT.

TORCH.

APPLlcATloN man luLY 215.1917

1,260,741, Patented Mams, 191s.

2 SHEETS-SHEET 1.V

(jf WOMMMWM A. J. ARCHAMBAULT.

TORCH.

APPLICATION FILED JULY 26.1911.

1,260,741. Patented Mar. 26,1918

2 SHEETS-SHEET 2.

instaan er Application 'filed July' S36,

To all whom z' may concern.'

Be it known that l, ARTHUR J. neonati-- Bamm, a citizen of the United States, residing at lChicago, county of Cook, State of Illinois, have invented a certain new and useful Improvement in Torches, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention has for its object to produce a blow torch of simple and rigid construction, adapted to operate efficiently when us.

ing as afuel kerosene or other hydrocarbons heavier than gasolene.

Viewed in its more specific aspects, my invention may be said to have ior its objects to produce a blow torch having in a small space a large heating surface adapted to vaporize the fuel before it is discharged from the burner orifice; to produce a vaporizing structure which will be eiiiciently dis posed in the flame of the torch; to produce a vaporizing device which will serve as a shield Ito prevent the discharge beyond the torch of liquid fuel in case the torch should negligently be placed ina condition permitting a stream of liquid fuel to be discharged through the burner orifice; to produce a torch in which the mixing chamberv and a vaporizer ot large capacity are formed of a single casting; to produce a torch in which the burner and the supply `pipe leading to the burner will be rigidly supported from and braced by Atheinain casting so as to make it practically impossible to damage the torch through rough usage; and to produce a controlling valve in which the needle member may readily be replaced.

The various features oi' novelty whereby my invention is characterized will hereinafter be pointed out with particularity in the claims; but, for a full understanding of my invention and of'its objects and advantages, reference may be had to the following {letal/ed description taken in connection with the accompanying drawings, wherein:

Figure l is a side elevation of a torch Specification of Letters Patent.

Patented lllar. 25p?,

lili?. .Serial No. 182,8261

arranged in accordance with a preferred form of my invention;

2 is a vertical section through a fuel inlet cap of the torch reservoir;

Fig'. 3 if a section taken approximately on line 3-3 of Fig. l, on a somewhat larger scale;

Fig. a is a section taken on line oi" Fig. 3;

Fig. 5- is a section taken on line 5-5 of Eig. 3; and

Fig. is a longitudinal section on a greatly enlarged scale through the end olf' the burner valve, illustrating the manner of attaching the cleaning needle.

Referring to the drawings, l represents a, reservoir provided with a handle, 2,and an air pump, 3, all ot any usual or suitable construction. From the top of the reservoir approximately rises a pipe, el, from the upper end of which is supported the torch. The torch comprises a combined fuel vaporizer and a device for mixing air with the burning;` fuel, together with a burner, all of which are novel and improved construction. The vaporizer and 'niiXer, which I shall call the nozzle, comprises a single casting, 5, in the form of a hollow trust-urn ot' a cone, arranged with its axis horizontal as is usual in blowtorches. 0,11 the under side of the member 5, near the rear or larger end of the latter, is a downwardly projecting boss, 6, which is screwed upon or otherwise attached to the pipe 4.

The part 6 is provided with a central pas,

sage, 7, which communicates at its upper end with the rear end of one arm, 8, oi a V-shaped passage or conduit 'formed in the wall constituting,r the under side of the meinbcr 5; the passage 8 extending` forwardly to a point near theyfront end of the member 5 and there communicating with the front end of the connecting passage 9 which eK- tends rearwardly and, to some degree, upwardly to the rear end of the niember. In the chamber formed in the member 5 is a lf-shaped part, 10, the apex lying a short distance behind the iront end of the me1nber 5 and at about the anis thereof and the two arms extending rearwardly; one of the arms being directed downwardly' and the approximately other one upwardly as the rear end of the member 5 is approached. The arm which is directed downwardly terminates at the inner end of the passage 9 and is provided with a passage, 11, which communicates at end of the passage 11, and communicat.4

ing at its rear end with a burner-supplying pipe, 13, screwed into the rear end of the member 5. It will be seen that the four passages, 8, 9, 11 and 12, constitute a double V or an lVl with the two apexes displaced so that one lies approximately above the other instead of at the side t ereof, so that the fuel which entersthroug the port or passage 7 has a long way to travel before it reaches the burner-'supplying pipe 13.

It is possible to make the member 5 with its tortuous passages inthe form of a single casting by making the two V-shaped members solid and then boring the passages into the same from the rear; the rear ends of the passages 8, 9 and 4l1 being closed by screw plugs, 14 and 15; both ofthe passages 9 and 11 terminating in the opening closed by the plug 15. Upon removing the plugs, ready access may behad to the interior of the passages for the purpose of cleaning them.

At the rear end of the pipe 13 is supported the fuel injector 16, which is disposed in axial alinement with the member 5; the member 16 being carried upon the end of an arm, 17, 'projecting laterally from the plpe l13. At the extreme front end of the member 16 is the burner orifice, 18, through which a needle, 19, on the front end of a shut-off valve, 20, is adapted to project. The shut-ofi' valve is provided with a handle, 21, at the rear end of the :member 16, and the parts are so arranged that by turning the handle the flow of fuel tio the orifice may be permitted or interrupted? by the valve 20 and the orifice be kept cleztn by the movement of the needle back and yforth through the same. The whole worL'ing part lof the needle is smaller than the orifice so that the orifice will not be enlarged through the -action of the needle. The orifice 18 is quite small. The cleaning needle, which is preferably about one-thousandth of an inch smaller in diameter than the orifice to prevent it from sticking, must therefore be quite fine and necessarily has to be replaced from time to time. In order to facilitate such replacement, without making it necessary to replace also the shut-oft' valve, I

.screw the needle into the end of the shutoffy valve as indicated at 22 in Fig. 6. When a new nedele is required the old one is sim- LQBORM.

ply unscrewed anda new one put in its place. The orifice, 18, is preferably formed in a little detachable plug, 18, so that a new orifice may be provided quickly and easily and without discarding any considerable part of the burner.

The parts 13, 16 and 17 are necessarily comparatively light and in the ordinary torch are often broken or bent accidentally. To avoid accidents of this kind, I have provided the member 16 with two laterally disposed ears, 23, through which extend long screws, 24, whose frontends are screwed into the rear end of the nozzle while the rear ends arerigidly locked to the ears by means of lock nuts, 25, placed between which and the heads of the screws the ears are clamped. The fuel injector 16 is thus-supported by three posts consisting of the member 13 and the members 25, distributed 4around the same and thus forming a rigid,

powerful structure. Further sti ening of the parts and protection for the burner is afforded by means of a shield, Q6, in the form of a deep cup through the bottom of which the member 16 passes, while the mouth is extended forward into engagement with the rear end of the member 5.

The shield 26 is provided with perforations, 27, for admitting air and the nozzle is provided with perforations, 28, in the body portion thereof and alsoin the back wall, 29, in Vthe center of which is a large air and fuel opening, 30. The bottom of the chamber in the nozzle is inclined downwardly from thev front toward the rear and, in the rear between the bosses into which the plugs 14 and 15 are screwed,namely at ythe low point of the chamber in the nozthat it will not become overheated. Furthermore, particularly when combined with, the perforated shield, 26, the nozzle does away with the roaring sound that is made by the flame in all torches with which I am familiar and prevents the torch from being blown out in windy weather.

In the usual torch the chamber inthe nozzle decreasesI uniformly in cross sectional area to the outlet end. I have found that if this construction is employed in my ,irnproved torch it will produce a wide ame and, in order to reduce the spread of flame, l have abruptly reduced the outlet end of the chamber in the nozzle. This is conveniently accomplished by providing the outlet end recoger of the nozzle with an annular' inwardly directed iiange, 33. i l

Another feature of my invention has to do with the elosin of the fuel inlet into the reservoir. ln tie ordinary torch the cap 34 is provided With a leather Washer which soon ceases to function properly. Instead y of a-leather Washer I employ a Washer of lead, as indicated at 35 in Fig. 2.

The torch is primed and operated in the usual manner which requires no explanation. It will be seen that as the fuel rises into the torch device it travels through a long passage the Walls of which are highly heated, this being particularly true of the two elements of the passage in the V-shaped member l0 which the fuel enters last; the member 10 being wholly enveloped by the llame from the burner and serving as a super-heater to ,carry the vaporization far beyond the point to `which it is brought in the passages 8 and' 9 which of themselves produce a .vaporization of the fuel to as high a degree the ultimate vaporization obtained in any prior torch of which I am aware. Consequently my improved structure carries the 'vaporization to a much higher v"degree than has heretofore been possible, making the torch not only more,

efficient, but giving a much Wider range of control over the llame which may be made to projectonly an inch or two beyond the torch or be forced outwardly nine inches or more. Where, in the ordinary torch, the burner oi'ilice has a diameter of from six to eight one-thousandths of an inch, my improved vaporizer aifords such an increased capacity` that I am able to use a burner 'orifico having a diameter of fourteen onethousandths of an inch. Another advantage that results from the use of the V- shaped vapor-icing conduit Within the nozzle chamber is that the torchis not affected to any considerable degree by Weather changes for, even if the outer Walls of the nozzle become fairly cool in cold Weather, the longl conduit which `is completely enveloped by the llame has sufficient Vaporizing capacity to maintain a normal iame.

lt will also be seen that if for any reason liquid fuel is allowed to squirt out of the burner orifice, it will strike into the crotch ot' the member 10 so us to be caught in the mixing, chamber and flow down into the priming cup instead of shooting out of the front of the torch and thus causing possible damage to surrounding objects.

-l claim:

, l. In a plumbers torch, a burner, va mixing chamber lying infront of the burner, one of the Walls of said chamber having a tortuous fuel passage through -the same, and a conduit extending across the interior ofthe chamber, said conduit being connected at one end to. said passage and at its other end to said burner. l

In a plumbers torch, a burner, a mix ing chamber lying in front of the burner,

one of the Walls of the chamber havinga fuel passage extending therein from a point near the rear end of the chai'nber toward the front ofthe chamber and Aback again to the rear end of the chamber,l a conduit extending across the interior of the chamloer and connected at one end to one end of said passage, and a connection between the other end of said conduit and said burner.

S. ln a plumbers torch, a fuel injector, a mixing chamber lying in front of the fuel injector, one of the walls of the chamber having a fuel passage extending therein from a point near the rear end of the chamber toward the front of the chamber and back again to the rear end of the chamber, and a hollow V-shaped conduit arranged within said chamber with the apex lying at approximately the axis of and in the front end of said chamber and its arms extending rearwardly,the interior of one end of said V-shaped member being connected at one end to said passage and at its other end to said fuel injector.

4. ln a plumbers torch, a casting in the form of a hollow frustum of a cone having two converging passages extending longitudinally from the large end toward the small end and joining each other in proximity to the latter end, and having a V- shaped conduit with its apex lying at approximately the axis of said cone and the arms extending to the rear end of the latter, the rear end of the passage in one of said arms joining one of the first mentioned passages in the Wall of the casting so as to form a. long continuous fuel conduit made up of the four passages.

5. In a plumbers torch, a casting in the form of a hollow frustum of a cone having two converging passages extending longitudinally from the large end toward the small end and joining each other in proximity to the latter end, and having a V# shaped conduit with its apex lying at approximately the axis of said member and the arms extending to the rear end of the latter,

the rear end of the passage in one of said` arms joining one of the first mentioned passages in the wall of the casting so" as to form a long continuous fuel conduit Ina-de up of the four passages. a fuel injector connected to one end of said fuel conduit, for supplying fuel to the other end of said conduit.

6. ln a. pluinl'rers torch, a co bined I`va porizing and air mixing member, va fuel injector lying in rear if said member, a plurality of posts lyingl in rear of said member around said frei4 injector and connect- 'd means ing it and saidg-member together, one of said posts containing a fuel supply passage.

7. In a torch, a nozzle in the form of a hollow rustum of a cone, a burner situ- 5 ated behind the large end of the nozzle, and

a fuel supply conduit including a part eX tending across the interior of thechamber in the nozzle, the nozzle having a narrow ARTHUR J. ARCHAMBAULT.

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