CA1333254C - Cutting torch having peripheral venting means - Google Patents
Cutting torch having peripheral venting meansInfo
- Publication number
- CA1333254C CA1333254C CA 600869 CA600869A CA1333254C CA 1333254 C CA1333254 C CA 1333254C CA 600869 CA600869 CA 600869 CA 600869 A CA600869 A CA 600869A CA 1333254 C CA1333254 C CA 1333254C
- Authority
- CA
- Canada
- Prior art keywords
- tube means
- external tube
- disposed
- ignition
- external
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 29
- 238000013022 venting Methods 0.000 title description 3
- 230000002093 peripheral effect Effects 0.000 title description 2
- 239000000446 fuel Substances 0.000 claims abstract description 10
- 239000000567 combustion gas Substances 0.000 claims abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 14
- 239000001301 oxygen Substances 0.000 claims description 14
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 claims description 2
- 229910001487 potassium perchlorate Inorganic materials 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- -1 masonry Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000238586 Cirripedia Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/08—Cutting, scarfing, or desurfacing by applying flames by applying additional compounds or means favouring the cutting, scarfing, or desurfacing procedure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0211—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in cutting
- B23K35/0216—Rods, electrodes, wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
- B28D1/221—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising by thermic methods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/14—Drilling by use of heat, e.g. flame drilling
- E21B7/146—Thermal lances
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
A cutting device which includes an external tube, an internal tube disposed within the external tube, and a number of steel rods or wires housed within the internal tube. A squib, with or without additional fuel, is disposed within the external tube and adjacent to one end of the internal tube. A
plurality of vent holes are provided on the periphery of the external tube to allow the combustion gases to exhaust therethrough. The vent holes are located away from the squib but adjacent to the end of the internal tube. One of the open ends of the external tube is sealed with a plug.
plurality of vent holes are provided on the periphery of the external tube to allow the combustion gases to exhaust therethrough. The vent holes are located away from the squib but adjacent to the end of the internal tube. One of the open ends of the external tube is sealed with a plug.
Description
133325~
CUTTING TORCH HAVING PERIPHERAL VENTING MEANS
BACKGROUND AND FIELD OF INVENTION
The present invention is directed to a lance or torch for a cutting tool for burning through steel, masonry, concrete, metal-smelter plugs, and the like.
Conventional torches are generally exothermic burning rods which include a steel tube or tubes with steel wires or rods inside, wherein oxygen is circulated through the tubes and around the wires.
The steel tubes and wires are ignited at one end of the tube or tubes by passing high current through the rods or by placing the end of the rods in a smoldering cardboard punk tube. The oxygen causes the smoldering tube to burn rapidly and the combustion gases and the flames coming out from the steel tube and around wires heat them sufficiently to ignite. Once ignited, the steel sustains combustion for a sufficiently long period of time until the rods are completely spent.
The hot combustion products and excess oxygen flowing from the end of the burning tube and wires are sufficiently hot to burn through almost any material, including steel, stainless steel, fire bricks, and the like.
The prior art is replete with cutting torches that may be used in the open air or underwater. The examples of such torches and related devices are disclosed in U.S. Patents 3,260,076;
3,487,791; 3,S00,774; 3,507,230; 3,507,231; 3,592,573;
3,658,599; 3,713,636; 3,994,666; 4,069,407; 4,114,863;
4,131,780; 4,182,947; 4,401,040; 4,416,444; 4,477,060;
4,495,848; 4,541,616; 4,559,890; 4,601,761; and 4,654,496. Additional examples are disclosed in British 2,151,530, Japanese 50 035049 and Japanese 78 044902.
~7 However, conventional devices suffer with many disadvantages. For example, the torches that are used in the open air can be ignited by striking with a 50 ampere or greater arc at the tube rim, or by fanning a smoldering cardboard tube with oxygen to a white-hot flame. However, batteries required to provide the igniting current, usually of the motorcycle/automobile battery type are heavy, awkward to use, and require recharging. Additionally, igniting the cardboard punk tube in rain or under windy conditions has been observed to be difficult, and further hazardous on a scaffold or the like.
Moreover, both of these igniting methods are almost useless when the torch is used underwater. The underwater objects generally have a high resistance and cannot be made part of a 50 ampere or greater ignition circuit or, conversely, a very high and dangerous voltage is necessary to overcome barnacles, slimy algae and the like.
The underwater cutting rod disclosed in U.S.
Patents 4,069,407 and 4,182,197, to Brower, uses a continuous 100 ampere or greater welding current with an oxygen-fed hollow electrode. The steady flow of current helps in underwater ignition, however, establishing the return path through the structure being cut is difficult. Moreover, the underwater use of high intensity currents poses great danger of bodily harm to the operator.
In addition to the above, although the smoldering cardboard tube or high intensity current flow through the tubes methods of igniting (generally provided by an automotive type of battery) are useful in many applications, they are not favored during rescue and emergency types of situations because of the time required to ignite the cardboard tube or 133325~
handling of the bulky battery ignition system.
Moreover, these ignition systems do not function properly at all during underwater cutting operations.
In view of the problems encountered, there is a need for a cutting torch which is highly reliable as to the ignition, sufficiently heat-resistant to resist flash fires, functions well under the effects of intense cold or ice-water, easily portable, ignites fast, and which does not pose a danger to the operator.
OBJECTS AND SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention to provide a cutting device which overcomes the aforementioned disadvantages of the conventional cutting devices.
It is another object of the present invention to provide a cutting device which is highly reliable as to its ignition in air and underwater.
It is yet another object of the present invention to provide a cutting device which is heat-resistant to flash fires and therefore safe to store.
A further object of the present invention is to provide a cutting device which is highly reliable and performs well during rescue and emergency operations.
Yet a further object of the present invention is to provide a cutting device which is lightweight, easily portable and uses a very low current to ignite.
Still a further object of the present invention is to provide a cutting device which uses an electrically ignited squib to ignite the torch within a fraction of a second.
An additional object of the present invention is to provide an underwater cutting device which is quickly ignited.
Yet an additional object of the present invention is to provide an underwater cutting device which uses unsealed lances which can be mounted or reloaded into a handle under water very guickly or within seconds.
Another object of the present invention is to provide a cutting device in which the oxygen flows along and over the ends of the rods, to provide a hot and uniform flame.
Yet another object is to provide a cutting device in which the oxygen flow is reversed in the area adjacent the ends of the rods to provide sufficient oxygen for burning and proper ignition.
Still another object of this invention is to provide means for quickly and efficiently removing exhaust and spent gases from the area of direct burn whereby to avoid incomplete combustions.
In summary, the object of the present invention is to provide a cutting device which is very portable and uses a very small electric source to ignite a squib or an electric match.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects and advantages and novel features of the present invention will become apparent from the following detailed-description of the preferred embodiments of the invention illustrated in the accompanying drawings, in which:
FIGURE 1 is a cross-sectional view of a lance or torch for a cutting device in accordance with the present invention;
133325~
FIGURE 2 is an enlarged partial cross-sectional view of the cutting device of the present invention;
FIGURE 3 is a cross-sectional view taken along line 3-3 of Figure 2;
FIGURE 4 is a cross-sectional view of a second embodiment of the cutting device of the present invention;
FIGURE 5 is a cross-sectional view of a third embodiment of the cutting device of the present invention; and FIGURE 6 is a cross-sectional view of a lS fourth embodiment of the cutting device of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
As shown in Figure 1, the cutting device includes a lance A which is connected with the handle of an entire torch device (not shown). Lance A is formed of an external tube 2 with open ends 4 and 6.
An internal tube 8 is coaxial with external tube 2 and is disposed therein. The internal tube 8 includes ends 10 and 12 corresponding with ends 4 and 6, respectively, of external tube 2. As shown in Figure 1, the length of internal tube 8 is substantially less than the length of the external tube 2. A number of rods or wires 14, which are fusible, are housed within the internal tube 8. As best shown in Figure 3, rods 14 define a space 16 therebetween to allow oxygen or the like from a source not shown to flow therethrough.
The external and internal tubes 2 and 8, and rods or wires 14, are all made of a suitable conventional metal, such as steel. It should be noted that, although only four rods 14 are shown herein, this number can be varied in order to accommodate the operator,s specifications.
A squib 20, or the like, is placed within external tube 2 adjacent the end 12 of internal tube 8. The squib 20 includes a suitable charge 22 enclosed in a shell 24. The squib shell 24 is made of a suitable conventional material, such as aluminum.
The squib charge 22 may preferably be composed of a 15/85 boron, ferric oxide ignition charge and a 37/50/13 magnesium, ferric oxide, and potassium perchlorate base charge enclosed within squib-shell 24. Squib 20 requires a firing current of about 3/4 ampere and reacts within one-tenth of a second to produce an incandescent white-glowing mass of magnesium, aluminum and iron, that instantly reacts with the oxygen stream to create temperatures in the 2000+.C range. Additionally, squib 20 is made so as to be heat-resistant and can withstand temperatures of up to 240C for one day.
Lance A further includes ignition wires 28 and 30 for carrying the firing current from an electrical connector 32 to the squib 20. The electrical connector 32 is connected via conventional means to an electric source (not shown) for supplying the firing currents for igniting the squib 20.
As shown in Figure 1, wire 28 may run along rods or wires 14, inside the internal tube 8; or, alternatively, it may run through a space between external tube 2 and internal tube 8. Wire 30, which is bare-ended, on the other hand, may be secured between plug 34 and external tube 2.
Plug 34, made of plastic or metal, preferably copper, is used to seal open end 6 of external tube 2. The plug 34 is securely positioned in external tube 2 by a crimp 35 which establishes the electrical return connection through external tube 2.
The other end 4 of external tube 2 may be left open to 133325~
make a connection with the handle of a torch (not shown).
Since the end 4 of external tube 2 is unsealed, lance A of the present invention may be loaded and unloaded from the handle of the torch under the water without having to worry about the integrity of the seal. This construction further makes it convenient to mount and unmount several lances within seconds during rescue or emergency operations.
The external tube 2 is provided with holes 36 to allow the combustion gases to vent therethrough.
Holes 36 are provided on the periphery of external tube 2 and may preferably be located at one-sixteenth (1/16) of one inch to one inch away from the end 12 of internal tube 8 and towards the end 4 of external tube 2. Preferably, four holes are provided for adequate venting in case the internal tube 8 blocks or closes one or two of the holes 36. However, successful ignitions have been obtained with only two holes, and even one hole could be used if it is sufficiently large in size. Preferably, the diameter of holes 36 may be from about 1/16 to 1/8 of one inch. Other similar openings, such as slits, may also be provided in place of holes 36.
As shown in Figure 2, the oxygen flowing through space 16 between the rods 14 comes out of the open end 12 of internal tube 8 and flows back over the ends of rods 14 and internal tube 8 before it is exhausted or vented through holes 36.
Figure 4 discloses a second embodiment of the present invention, which is similar to the lance A
shown in Figure 1 with the exception of additional fuel 38 placed between squib 20 and end 12 of internal tube 8. Additional fuel 38, which burns slowly from the heat provided by squib 20, is provided to prolong 13332~4 the burning time within lance B to thereby allow the hot combustion gases to ignite steel rods or wires 14.
Paper, wood, grease or polyethylene or steel, magnesium or aluminum shapes, steel wool, aluminum mesh or other combustible metal structures euch as washers, nuts and spacers may be used as the additional fuel 38.
Figure 5 discloses a third embodiment of the present invention which is similar to the second embodiment shown in Figure 4, with the exception of an electrical match 50 to burn additional fuel 52. As shown in Figure 5, a tube 54 encloses a small amount of fuel 52 and a small electric match 50 therein. The tube 54 may be made of a polyethylene material and is placed between plug 34 and end 12 of internal tube 8, as in the first and second embodiments shown in Figures 1 and 4, respectively. The fuel 52 may preferably be a small quantity of grease contained in a 1/4 of one inch long tube 54. The advantage of using a small match is that if the unit accidentally ignites when there is no oxygen flow, there is no danger of an accidental ignition, since the heat output from the match is very low. A simple heating element dipped in grease, or simply wrapped in paper, may be substituted for the match 50.
Figure 6 discloses a fourth and the final embodiment of the present invention which is similar to the third embodiment of the present invention disclosed in Figure S, with the exception of wiring 56 for an electric match 58. The wiring 56 is brought out through the plug 34. As in the third embodiment shown in Figure S, fuel 60 is placed adjacent the electric match 58 for its ignition.
Although the squib 20 has been shown in Figures 1-4 to be positioned between internal tube 8 l33325~
and plug 34, it should be noted that it may alternatively be positioned alongside rods 14, or inside an auxiliary fuel structure attached to the rods 14. In addition, it should also be noted that the device of the present invention functions equally well without the presence of the internal tube 8, in which case the squib 20 may either be located at the end or alongside the rods 14 within an external tube 2. The rods may be entirely or partially encased within the tube.
While this invention has been described as having a preferred design, it is understood that it is capable of further modifications, uses and/or adaptations of the invention and following in general the principle of the invention and including such departures from the present disclosure as has come within known customary practice in the art to which the invention pertains, and as may be applied to the central features hereinbefore set forth, and fall within the scope of the invention and of the limits of the claims appended hereto.
CUTTING TORCH HAVING PERIPHERAL VENTING MEANS
BACKGROUND AND FIELD OF INVENTION
The present invention is directed to a lance or torch for a cutting tool for burning through steel, masonry, concrete, metal-smelter plugs, and the like.
Conventional torches are generally exothermic burning rods which include a steel tube or tubes with steel wires or rods inside, wherein oxygen is circulated through the tubes and around the wires.
The steel tubes and wires are ignited at one end of the tube or tubes by passing high current through the rods or by placing the end of the rods in a smoldering cardboard punk tube. The oxygen causes the smoldering tube to burn rapidly and the combustion gases and the flames coming out from the steel tube and around wires heat them sufficiently to ignite. Once ignited, the steel sustains combustion for a sufficiently long period of time until the rods are completely spent.
The hot combustion products and excess oxygen flowing from the end of the burning tube and wires are sufficiently hot to burn through almost any material, including steel, stainless steel, fire bricks, and the like.
The prior art is replete with cutting torches that may be used in the open air or underwater. The examples of such torches and related devices are disclosed in U.S. Patents 3,260,076;
3,487,791; 3,S00,774; 3,507,230; 3,507,231; 3,592,573;
3,658,599; 3,713,636; 3,994,666; 4,069,407; 4,114,863;
4,131,780; 4,182,947; 4,401,040; 4,416,444; 4,477,060;
4,495,848; 4,541,616; 4,559,890; 4,601,761; and 4,654,496. Additional examples are disclosed in British 2,151,530, Japanese 50 035049 and Japanese 78 044902.
~7 However, conventional devices suffer with many disadvantages. For example, the torches that are used in the open air can be ignited by striking with a 50 ampere or greater arc at the tube rim, or by fanning a smoldering cardboard tube with oxygen to a white-hot flame. However, batteries required to provide the igniting current, usually of the motorcycle/automobile battery type are heavy, awkward to use, and require recharging. Additionally, igniting the cardboard punk tube in rain or under windy conditions has been observed to be difficult, and further hazardous on a scaffold or the like.
Moreover, both of these igniting methods are almost useless when the torch is used underwater. The underwater objects generally have a high resistance and cannot be made part of a 50 ampere or greater ignition circuit or, conversely, a very high and dangerous voltage is necessary to overcome barnacles, slimy algae and the like.
The underwater cutting rod disclosed in U.S.
Patents 4,069,407 and 4,182,197, to Brower, uses a continuous 100 ampere or greater welding current with an oxygen-fed hollow electrode. The steady flow of current helps in underwater ignition, however, establishing the return path through the structure being cut is difficult. Moreover, the underwater use of high intensity currents poses great danger of bodily harm to the operator.
In addition to the above, although the smoldering cardboard tube or high intensity current flow through the tubes methods of igniting (generally provided by an automotive type of battery) are useful in many applications, they are not favored during rescue and emergency types of situations because of the time required to ignite the cardboard tube or 133325~
handling of the bulky battery ignition system.
Moreover, these ignition systems do not function properly at all during underwater cutting operations.
In view of the problems encountered, there is a need for a cutting torch which is highly reliable as to the ignition, sufficiently heat-resistant to resist flash fires, functions well under the effects of intense cold or ice-water, easily portable, ignites fast, and which does not pose a danger to the operator.
OBJECTS AND SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention to provide a cutting device which overcomes the aforementioned disadvantages of the conventional cutting devices.
It is another object of the present invention to provide a cutting device which is highly reliable as to its ignition in air and underwater.
It is yet another object of the present invention to provide a cutting device which is heat-resistant to flash fires and therefore safe to store.
A further object of the present invention is to provide a cutting device which is highly reliable and performs well during rescue and emergency operations.
Yet a further object of the present invention is to provide a cutting device which is lightweight, easily portable and uses a very low current to ignite.
Still a further object of the present invention is to provide a cutting device which uses an electrically ignited squib to ignite the torch within a fraction of a second.
An additional object of the present invention is to provide an underwater cutting device which is quickly ignited.
Yet an additional object of the present invention is to provide an underwater cutting device which uses unsealed lances which can be mounted or reloaded into a handle under water very guickly or within seconds.
Another object of the present invention is to provide a cutting device in which the oxygen flows along and over the ends of the rods, to provide a hot and uniform flame.
Yet another object is to provide a cutting device in which the oxygen flow is reversed in the area adjacent the ends of the rods to provide sufficient oxygen for burning and proper ignition.
Still another object of this invention is to provide means for quickly and efficiently removing exhaust and spent gases from the area of direct burn whereby to avoid incomplete combustions.
In summary, the object of the present invention is to provide a cutting device which is very portable and uses a very small electric source to ignite a squib or an electric match.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects and advantages and novel features of the present invention will become apparent from the following detailed-description of the preferred embodiments of the invention illustrated in the accompanying drawings, in which:
FIGURE 1 is a cross-sectional view of a lance or torch for a cutting device in accordance with the present invention;
133325~
FIGURE 2 is an enlarged partial cross-sectional view of the cutting device of the present invention;
FIGURE 3 is a cross-sectional view taken along line 3-3 of Figure 2;
FIGURE 4 is a cross-sectional view of a second embodiment of the cutting device of the present invention;
FIGURE 5 is a cross-sectional view of a third embodiment of the cutting device of the present invention; and FIGURE 6 is a cross-sectional view of a lS fourth embodiment of the cutting device of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
As shown in Figure 1, the cutting device includes a lance A which is connected with the handle of an entire torch device (not shown). Lance A is formed of an external tube 2 with open ends 4 and 6.
An internal tube 8 is coaxial with external tube 2 and is disposed therein. The internal tube 8 includes ends 10 and 12 corresponding with ends 4 and 6, respectively, of external tube 2. As shown in Figure 1, the length of internal tube 8 is substantially less than the length of the external tube 2. A number of rods or wires 14, which are fusible, are housed within the internal tube 8. As best shown in Figure 3, rods 14 define a space 16 therebetween to allow oxygen or the like from a source not shown to flow therethrough.
The external and internal tubes 2 and 8, and rods or wires 14, are all made of a suitable conventional metal, such as steel. It should be noted that, although only four rods 14 are shown herein, this number can be varied in order to accommodate the operator,s specifications.
A squib 20, or the like, is placed within external tube 2 adjacent the end 12 of internal tube 8. The squib 20 includes a suitable charge 22 enclosed in a shell 24. The squib shell 24 is made of a suitable conventional material, such as aluminum.
The squib charge 22 may preferably be composed of a 15/85 boron, ferric oxide ignition charge and a 37/50/13 magnesium, ferric oxide, and potassium perchlorate base charge enclosed within squib-shell 24. Squib 20 requires a firing current of about 3/4 ampere and reacts within one-tenth of a second to produce an incandescent white-glowing mass of magnesium, aluminum and iron, that instantly reacts with the oxygen stream to create temperatures in the 2000+.C range. Additionally, squib 20 is made so as to be heat-resistant and can withstand temperatures of up to 240C for one day.
Lance A further includes ignition wires 28 and 30 for carrying the firing current from an electrical connector 32 to the squib 20. The electrical connector 32 is connected via conventional means to an electric source (not shown) for supplying the firing currents for igniting the squib 20.
As shown in Figure 1, wire 28 may run along rods or wires 14, inside the internal tube 8; or, alternatively, it may run through a space between external tube 2 and internal tube 8. Wire 30, which is bare-ended, on the other hand, may be secured between plug 34 and external tube 2.
Plug 34, made of plastic or metal, preferably copper, is used to seal open end 6 of external tube 2. The plug 34 is securely positioned in external tube 2 by a crimp 35 which establishes the electrical return connection through external tube 2.
The other end 4 of external tube 2 may be left open to 133325~
make a connection with the handle of a torch (not shown).
Since the end 4 of external tube 2 is unsealed, lance A of the present invention may be loaded and unloaded from the handle of the torch under the water without having to worry about the integrity of the seal. This construction further makes it convenient to mount and unmount several lances within seconds during rescue or emergency operations.
The external tube 2 is provided with holes 36 to allow the combustion gases to vent therethrough.
Holes 36 are provided on the periphery of external tube 2 and may preferably be located at one-sixteenth (1/16) of one inch to one inch away from the end 12 of internal tube 8 and towards the end 4 of external tube 2. Preferably, four holes are provided for adequate venting in case the internal tube 8 blocks or closes one or two of the holes 36. However, successful ignitions have been obtained with only two holes, and even one hole could be used if it is sufficiently large in size. Preferably, the diameter of holes 36 may be from about 1/16 to 1/8 of one inch. Other similar openings, such as slits, may also be provided in place of holes 36.
As shown in Figure 2, the oxygen flowing through space 16 between the rods 14 comes out of the open end 12 of internal tube 8 and flows back over the ends of rods 14 and internal tube 8 before it is exhausted or vented through holes 36.
Figure 4 discloses a second embodiment of the present invention, which is similar to the lance A
shown in Figure 1 with the exception of additional fuel 38 placed between squib 20 and end 12 of internal tube 8. Additional fuel 38, which burns slowly from the heat provided by squib 20, is provided to prolong 13332~4 the burning time within lance B to thereby allow the hot combustion gases to ignite steel rods or wires 14.
Paper, wood, grease or polyethylene or steel, magnesium or aluminum shapes, steel wool, aluminum mesh or other combustible metal structures euch as washers, nuts and spacers may be used as the additional fuel 38.
Figure 5 discloses a third embodiment of the present invention which is similar to the second embodiment shown in Figure 4, with the exception of an electrical match 50 to burn additional fuel 52. As shown in Figure 5, a tube 54 encloses a small amount of fuel 52 and a small electric match 50 therein. The tube 54 may be made of a polyethylene material and is placed between plug 34 and end 12 of internal tube 8, as in the first and second embodiments shown in Figures 1 and 4, respectively. The fuel 52 may preferably be a small quantity of grease contained in a 1/4 of one inch long tube 54. The advantage of using a small match is that if the unit accidentally ignites when there is no oxygen flow, there is no danger of an accidental ignition, since the heat output from the match is very low. A simple heating element dipped in grease, or simply wrapped in paper, may be substituted for the match 50.
Figure 6 discloses a fourth and the final embodiment of the present invention which is similar to the third embodiment of the present invention disclosed in Figure S, with the exception of wiring 56 for an electric match 58. The wiring 56 is brought out through the plug 34. As in the third embodiment shown in Figure S, fuel 60 is placed adjacent the electric match 58 for its ignition.
Although the squib 20 has been shown in Figures 1-4 to be positioned between internal tube 8 l33325~
and plug 34, it should be noted that it may alternatively be positioned alongside rods 14, or inside an auxiliary fuel structure attached to the rods 14. In addition, it should also be noted that the device of the present invention functions equally well without the presence of the internal tube 8, in which case the squib 20 may either be located at the end or alongside the rods 14 within an external tube 2. The rods may be entirely or partially encased within the tube.
While this invention has been described as having a preferred design, it is understood that it is capable of further modifications, uses and/or adaptations of the invention and following in general the principle of the invention and including such departures from the present disclosure as has come within known customary practice in the art to which the invention pertains, and as may be applied to the central features hereinbefore set forth, and fall within the scope of the invention and of the limits of the claims appended hereto.
Claims (10)
1. A cutting device, comprising:
a) an elongate external tube means open at least at one end thereof;
b) a plurality of consumable elements disposed within said external tube means, said elements being spaced within said external tube means to permit the flow of a gas therethrough;
(c) ignition means disposed within said external tube means and adjacent one end of said consumable elements;
(d) said external tube means including at least one opening disposed about the periphery thereof for allowing the combustion gases to vent therethrough; and (e) means for sealing said at least one end of said external means.
a) an elongate external tube means open at least at one end thereof;
b) a plurality of consumable elements disposed within said external tube means, said elements being spaced within said external tube means to permit the flow of a gas therethrough;
(c) ignition means disposed within said external tube means and adjacent one end of said consumable elements;
(d) said external tube means including at least one opening disposed about the periphery thereof for allowing the combustion gases to vent therethrough; and (e) means for sealing said at least one end of said external means.
2. The device of Claim 1, further comprising an elongate internal tube means having a length substantially less than the length of said external tube means.
3. The device of Claim 2, wherein;
(a) said at least one opening is located adjacent said one end of said consumable elements but away from said ignition means.
(a) said at least one opening is located adjacent said one end of said consumable elements but away from said ignition means.
4. The device of Claim 2, wherein said ignition means is disposed between said consumable elements and said sealing means.
5. The device of Claim 4, wherein said ignition means includes a squib.
6. The device of Claim 5, further comprising fuel means disposed between said squib and said consumable elements.
7. An underwater cutting device, comprising:
a) an elongate external tube means open at least at one end thereof;
b) an elongate internal tube means disposed coaxically within said external tube means:
c) a plurality of consumable elements disposed within said internal tube means, said elements being spaced within said internal tube means to permit the flow of a gas therethrough;
d) ignition means disposed within said external tube means and adjacent one end of said consumable elements;
e) means for conveying oxygen to, around, and away from said one end of said consumable elements; and f) means for sealing said at least one end of said external means.
a) an elongate external tube means open at least at one end thereof;
b) an elongate internal tube means disposed coaxically within said external tube means:
c) a plurality of consumable elements disposed within said internal tube means, said elements being spaced within said internal tube means to permit the flow of a gas therethrough;
d) ignition means disposed within said external tube means and adjacent one end of said consumable elements;
e) means for conveying oxygen to, around, and away from said one end of said consumable elements; and f) means for sealing said at least one end of said external means.
8. The device of Claim 7, wherein said oxygen conveying means including at least one opening disposed about the periphery of said external tube means for allowing the combustion gases to vent therethrough.
9. An underwater cutting torch, comprising:
a) an elongate external tube means open at least at one end thereof;
b) an elongate internal tube means disposed coaxially within said external tube means;
c) a plurality of consumable rods housed within said internal tube means, said rods being spaced within said internal tube means to permit the flow of a gas therethrough;
d) plug means for sealing said at least one end of said external tube means;
e) ignition means positioned between said plug means and one end of said consumable rods;
f) said external tube means including a plurality of openings disposed about the periphery thereof for allowing combustion gases to vent therethrough; and g) said openings being positioned so as to be adjacent to said one end of said consumable rods but away from said ignition means.
a) an elongate external tube means open at least at one end thereof;
b) an elongate internal tube means disposed coaxially within said external tube means;
c) a plurality of consumable rods housed within said internal tube means, said rods being spaced within said internal tube means to permit the flow of a gas therethrough;
d) plug means for sealing said at least one end of said external tube means;
e) ignition means positioned between said plug means and one end of said consumable rods;
f) said external tube means including a plurality of openings disposed about the periphery thereof for allowing combustion gases to vent therethrough; and g) said openings being positioned so as to be adjacent to said one end of said consumable rods but away from said ignition means.
10. The device of Claim 9, wherein:
a) said ignition means is a squib; and b) said squib including boron, ferric oxide ignition charge and a magnesium, ferric oxide, and potassium perchlorate base charge encased in an aluminum shell.
a) said ignition means is a squib; and b) said squib including boron, ferric oxide ignition charge and a magnesium, ferric oxide, and potassium perchlorate base charge encased in an aluminum shell.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19923188A | 1988-05-26 | 1988-05-26 | |
| US199,231 | 1988-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1333254C true CA1333254C (en) | 1994-11-29 |
Family
ID=22736725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 600869 Expired - Fee Related CA1333254C (en) | 1988-05-26 | 1989-05-26 | Cutting torch having peripheral venting means |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1333254C (en) |
| GB (1) | GB2218933B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5580515A (en) * | 1995-08-22 | 1996-12-03 | Petrovich; Paul A. | Chemical igniter for an exothermic cutting lance |
| CN106903423A (en) * | 2017-04-28 | 2017-06-30 | 郎叶龙 | Portable underwater moving emergency cutter sweep |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE488583A (en) * | 1948-04-21 | |||
| GB645747A (en) * | 1948-10-16 | 1950-11-08 | Michael Nathanson | Improvements in or relating to apparatus for use in the manufacture of ice confections and the like |
| SE438276B (en) * | 1983-09-12 | 1985-04-15 | Salen & Wicander Ab | TOOL HOLDERS, PREFERRED TO THERMAL LANSAR |
-
1989
- 1989-05-25 GB GB8912067A patent/GB2218933B/en not_active Expired - Lifetime
- 1989-05-26 CA CA 600869 patent/CA1333254C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2218933B (en) | 1992-06-10 |
| GB2218933A (en) | 1989-11-29 |
| GB8912067D0 (en) | 1989-07-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |