Layer Or Zone Contains An Inorganic Explosive Or Inorganic Thermic Component Patents (Class 149/15)
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Patent number: 4875948Abstract: A combustible delay barrier for providing a delay to intrusion into an object. The delay barrier comprises a combustible layer containing a source of fuel such as a metal and/or a polymer and a source of oxygen such as an oxidizer. The combustible layer of the delay barrier is ignitable at a temperature in excess of about 300.degree. C., during combustion is resistant to the effects of common fire extingushing materials, and is capable of sustaining combustion with a burn rate of no more than about six inches per minute.Type: GrantFiled: April 8, 1988Date of Patent: October 24, 1989Inventor: Vencatesh R. P. Verneker
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Patent number: 4824495Abstract: A combustible coating for providing a delay barrier to intrusion into an object. The coating contains a source of fuel as a metal and/or a polymer and a source of oxygen such as an oxidizer. The coating is ignitable at a temperature in excess of about 300.degree. C., during combustion is resistant to the effects of common fire extinguishing materials, and is capable of sustaining combustion for at least five minutes with a burn rate of no more than about six inches per minute.Type: GrantFiled: April 10, 1987Date of Patent: April 25, 1989Assignee: Martin Marietta CorporationInventor: Vencatesh R. P. Verneker
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Patent number: 4815386Abstract: Pyrophoric preparations made of crushable open-celled metal skeleton such as honeycomb, metal foam or expanded twisted foil, filled with pyrophoric powder, so that when crushed to make a compact disc the metal skeleton is deformed and helps lock the powder particles in place.Type: GrantFiled: July 17, 1984Date of Patent: March 28, 1989Assignee: Alloy Surfaces Company, Inc.Inventors: David P. Dillard, Alfonso L. Baldi
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Patent number: 4697521Abstract: The invention concerns a method and a smoke-producing pyrotechnical ammunition to shield the visible and infrared radiance in a wave length included between 0.4 and 14 .mu.m emitted by a target. First we produce instantly a first hot aerosol with a fast pyrotechnical composition, which masks the target through diffusion in the visible spectrum and with its emitting potential in the infrared zone. Then, we produce a second aerosol which contains hot carbon particles of which the size is included between 1 and 14 .mu.m with a slow pyrotechnical composition for shielding mainly through diffraction the thermal image emitted by the target. The fast composition includes zinc and zinc oxide, potassium perchlorate, hexachlorobenzene or hexachloroethane powder and a binding agent. The slow composition includes a compound which generates carbon particles of 1 to 14 .mu.Type: GrantFiled: July 27, 1983Date of Patent: October 6, 1987Assignee: Etat FrancaisInventors: Andre Espagnacq, Gerard D. Sauvestre
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Patent number: 4693181Abstract: The application discloses improvements in hollow charges for linear cutting or demolition purposes wherein a bar formed from a composite of explosive material and a first pliant material has a V-shaped groove with a liner formed from a composite of particulate metal and a second pliant material. The metal may be copper and preferably the first and second pliant materials include the same constituents. The charge may include a casing having a spacing portion having an engagement surface for presentation to a work surface, which engagement surface is parallel to the outer edges of the liner and spaced therefrom to maintain an optimum stand-off distance. The casing may further include a groove filling portion of low density material which may be integrally constructed with the casing from a flexible material such as expanded polyethylene.Type: GrantFiled: October 17, 1983Date of Patent: September 15, 1987Assignee: Royal Ordnance plcInventors: David A. Dadley, Peter J. Haskins
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Patent number: 4660474Abstract: A device for application in the art of blasting, by the use of nonelectric devices, and the new concept that employs pyrotechnic mixtures and combinations thereof which are distributed in granular form throughout the inside of a supporting tube. The pyrotechnic mixture applied to the supporting tube having been subjected to a suitable mixing process to ensure cohesive properties so that the mixture will adhere in the proper manner to the inside surface of the supporting tube, and will allow for great flexibility in the density of the surface charge, in addition to allowing for the use of a vast range of chemical substances, as well as the secondary use of these devices as retarder units.Type: GrantFiled: January 14, 1985Date of Patent: April 28, 1987Assignee: Britanite Industrias Quimicas Ltda.Inventor: Danilo A. Dias dos Santos
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Patent number: 4597810Abstract: The tracer unit, which is particularly adaptable for ammunition used in hand guns and submachine guns, consists of a base charge including about 70 to about 90 weight % strontium peroxide, about 5 to about 15 weight % calcium resinate and about 5 to about 10 weight % magnesium and an igniter charge covering the base charge and including about 40 to about 60 weight % calcium resinate, about 20 to about 30 weight % strontium nitrate and about 20 to about 30 weight % magnesium. A small cavity in the rear end of a projectile is partially filled with the base charge which is tamped into the cavity by the application of a low pressure, such as by hand tamping with a metal plunger or the like. The igniter charge is added to the projectile cavity on top of the base charge and, after drying, the exposed surface of the igniter charge is covered with a compatible moisture proofing material, such as shellac.Type: GrantFiled: June 20, 1985Date of Patent: July 1, 1986Inventors: Neal E. Trickel, Sherwood V. Strommen
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Patent number: 4557771Abstract: The invention relates to lining material for a hollow explosive charge with increased effectiveness mainly for the perforation of pipes of hydrocarbon-producing wells.The lining material according to the invention consists of alloy with bismuth content and/or metal mixture with bismuth content and/or elementary bismuth.Type: GrantFiled: March 28, 1983Date of Patent: December 10, 1985Assignees: Orszagos Koolaj es Gazipari Troszt, s Robbanoanyag FelugyeletInventors: Gyozo Bencz, Janos Deres, Peter Tuti
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Patent number: 4530728Abstract: An embedment system with controlled shrinkage for use with a composite-modified double-base propellant composition which is comprised of an embedment granule portion in percent by weight of nitrocellulose of about 23.0, nitroglycerine of about 8.8-13.8, triacetin of about 1.2, bisspiro orthocarbonate from about 2.5-5.0, resorcinol of about 1.5, 2-nitrodiphenylamine of about 1.0, ammonium perchlorate (10 micrometers) of about 48.5 and aluminum powder (20 micrometers) of about 10.0 and an embedment resin portion in percent by weight of bisphenol A-epichlorohydrin of about 50.0, epoxidized dimer acid of about 50.0, and a curative which is comprised of equal parts mixture of methylenedianiline, m-phenylenediamine, and i-propyl-m-phenylenediamine with an added accelerator of 2,4-dinitrophenol. This embedment system employs a specific bisspiro orthocarbonate, 3,9-bis(5'-norbornene-2'-yl)-1,5,7,11-tetraoxaspiro[5.Type: GrantFiled: November 7, 1984Date of Patent: July 23, 1985Assignee: The United States of America as represented by the Secretary of the ArmyInventor: David C. Sayles
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Patent number: 4464989Abstract: In a thermite igniter/heat source comprising a container holding an internal igniter load, there is provided the improvement wherein the container consists essentially of consumable consolidated thermite having a low gas output upon combustion, whereby upon ignition, substantially all of the container and said load is consumed with low gas production.Type: GrantFiled: May 13, 1983Date of Patent: August 14, 1984Assignee: The United States of America as represented by the United States Department of EnergyInventors: Albert Gibson, Lowell D. Haws, Jonathan H. Mohler
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Patent number: 4441428Abstract: This invention relates to a new Blasting Device especially adapted to drilling oil and gas wells, characterized by a shaped charge of explosives, having a liner of depleted uranium.Type: GrantFiled: January 11, 1982Date of Patent: April 10, 1984Inventor: Thomas A. Wilson
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Patent number: 4435481Abstract: Pyrophorically activated surfaces of metal foil or screen, prepared by diffusing into surface a selectably removable second metal that is then selectively removed as by leaching, can be covered with reactive or inert materials. Reactive materials such as easily ignited metals or carbon or decomposable chemicals increase the heat generated by pyrophoric action. Inert materials slow down or prevent pyrophoric action. Pressure-sensitive adhesive tape in which the adhesive is of the non-transfer or transfer types can be adhered to pyrophorically activated surfaces to slow down action or to adhere material that reduces or increases severity of pyrophoric action. Pyrophoric Ni can be preserved for many months in alkaline solutions such as aqueous KOH, NaOH and triethanolamine. Pyrophoric Fe is prepared and preserved in aqueous alkaline stannite. Even better preservation is obtained for Ni and Fe with glycerine, ethylene glycol, triethanolamine and propylene oxide.Type: GrantFiled: July 28, 1980Date of Patent: March 6, 1984Assignee: Alloy Surfaces Company, Inc.Inventor: Alfonso L. Baldi
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Patent number: 4406228Abstract: A pyrotechnic missile which includes a body, first and second pyrotechnic eets disposed on said body, and an autoigniter mounted on the body for igniting the pyrotechnic sheets. The combination of pyrotechnic sheets are adapted to yield an abundance of electrons while burning in a vacuum. The first pyrotechnic sheet includes a binder, cesium dichromate, cesium nitrate, boron, and a metal fuel. The second pyrotechnic sheet includes a binder, cesium nitrate, and a metal fuel. The autoignitor is adapted to ignite in response to heat due to air friction.Type: GrantFiled: April 22, 1969Date of Patent: September 27, 1983Assignee: The United States of America as represented by the Secretary of the NavyInventors: Woodrow Boettcher, Emanuel Goldman, John A. Gallaghan
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Patent number: 4389264Abstract: Process for the manufacture of insulated propellant sets for base-bleed gas generators, said propellant set consisting of a propellant containing one or more solid substances, at least one of which is an oxidant, and a binder being a thermoplastically deformable elastomer, characterized thereby that the propellant is introduced into an insulating envelope, which as an essential component contains a thermoplastically deformable elastomer suited for the binder, and is forced into the envelope at increased temperature.Type: GrantFiled: February 17, 1981Date of Patent: June 21, 1983Assignee: s.a. PRB, societe anonymeInventors: Wolfgang H. R. Klohn, Dieter H. Muller, Hiltmar A. O. Schubert
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Patent number: 4388126Abstract: A multi-component propellant charge is disclosed wherein one component is energetic high-strength composite resin, which is plasticized by an energetic plasticizer and supports the other components during the high-acceleration stage of the propellant's performance.Type: GrantFiled: September 22, 1980Date of Patent: June 14, 1983Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig Johnson, Paul Dendor, Harry L. Hodgkins
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Patent number: 4349612Abstract: A metal web having a pyrophoric surface is coated by a solid or liquid that does not block the pyrophoric property and undergoes a pyrophoricity-intensifying exothermic change when subjected to the pyrophoricity of that surface.Type: GrantFiled: March 30, 1979Date of Patent: September 14, 1982Assignee: Alloy Surfaces Company, Inc.Inventor: Alfonso L. Baldi
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Patent number: 4263850Abstract: An improved pyrotechnic cap capable of being activated by the radiant energy from an adjacent flashlamp. The cap includes a light-transmitting plastic container with a quantity of pyrotechnic composition hermetically sealed therein. Receipt of the described radiant energy causes activation of the composition whereby the cap produces an audible signal of high intensity (e.g. 158 to 164 decibels at 25 centimeters). The improvement comprises adding a moisture-indicating material (e.g. cobalti, cobaltous cyanide) to the cap to detect harmful quantities of moisture present within the container and change color in a discernible manner as a result of said detection.Type: GrantFiled: January 10, 1979Date of Patent: April 28, 1981Assignee: GTE Products CorporationInventors: Andre C. Bouchard, Thomas J. Sentementes, Harold H. Hall, Jr.
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Patent number: 4244295Abstract: An improved pyrotechnic cap capable of being activated by the radiant energy from an adjacent flashlamp. The cap includes a plastic container with a quantity of pyrotechnic composition hermetically sealed therein. Receipt of the described radiant energy causes activation of the composition whereby the cap produces an audible signal of high intensity (e.g. 158 to 164 decibels at 25 centimeters). The improvement comprises adding a desiccant material within the cap's container atop the pyrotechnic composition to absorb any quantities of moisture which might enter the container and adversely affect the cap's operability.Type: GrantFiled: January 10, 1979Date of Patent: January 13, 1981Assignee: GTE Products CorporationInventor: John W. Shaffer
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Patent number: 4193388Abstract: A container is provided which can be designed to heat its outer surface as to sterilize it, or to heat its inner surface and any contents therewithin. In a container that self sterilizes its outer surface, the container includes a combustible layer of thermit-type pyrotechnic material which can be ignited to generate considerable heat, and a thin casing around the combustible layer which is of highly thermally conductive materials such as aluminum which can be heated to a high temperature by the ignited combustible layer. A buffer layer which may be of metal, lies within the combustible layer, and a layer of insulation such as Teflon lies within the buffer layer to insulate the contents of the container from the heat. The thicknesses of the thermit-type charge of the combustible layer and of the casing are chosen so that the amount of heat from the charge heats the casing to a temperature which is only moderately high to avoid melting the casing.Type: GrantFiled: April 19, 1978Date of Patent: March 18, 1980Inventors: Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, Lien C. Yang
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Patent number: 4160062Abstract: A pyrotechnical sealing material comprises a heat-foamable synthetic resin capable of being foamed with the aid of a burnable pyrotechnical composition. The sealing material is in the form of a cord having a core made of the pyrotechnical composition and a casing separated from the core by a flexible sheath. The casing is formed from the heat-foamable synthetic resin.Type: GrantFiled: March 29, 1976Date of Patent: July 3, 1979Assignee: Dynamit Nobel AktiengesellschaftInventors: Heinz Gawlick, Axel Homburg, Werner Siegelin, Gunther Marondel, deceased
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Patent number: 4050347Abstract: A method for mass producing and loading explosive charges in detonators, ds, relays, primers, etc., utilizing the explosive charges each in sheet form. Sheets corresponding to the various increments, each containing the finely divided high explosive and binder therefor, are superposed in the proper order preferably on a sheet of closing disc material, and the resulting structure of layered sheets is cored to produce the explosive train. The coring can be accomplished with a battery of cutters so that large numbers of explosive trains can be cut to size simultaneously. The explosive train cores thus obtained can be pushed out of the cutters into cups, which are then crimped and sealed.Type: GrantFiled: July 9, 1976Date of Patent: September 27, 1977Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Stanley M. Adelman, Donal G. Ellington, Philip J. Quatrochi
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Patent number: 4013061Abstract: A self-contained heating device useful for a variety of heating applications is disclosed. In a preferred form of the invention a hermetically-sealed cartridge containing a chemical mixture which produces heat, but substantially no gas, upon ignition is disposed in a heating unit which also includes a means for igniting the cartridge and a heat transfer sleeve surrounding the cartridge. Preferably, the chemical mixture comprises an alumino-thermic mixture and the igniting means is a percussion primer cap. To increase the percentage of successful ignitions in such a device, a cone-shaped depression is formed in the alumino-thermic reactive mixture adjacent the percussion cap, which depression is preferably filled with a ignition mixture of finely divided aluminum and Fe.sub.2 O.sub.3 or Fe.sub.3 O.sub.4.Type: GrantFiled: March 26, 1975Date of Patent: March 22, 1977Assignee: Thermology, Inc.Inventors: John H. Trumble, Thomas C. Ehlert, Akos Szekely
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Patent number: 3995559Abstract: A solid propellant grain is disclosed comprising a plurality of alternating layers of encapsulated particulate solid fuel and solid oxidizer encapsulated by a matrix comprising polytetrafluoroethylene and a polymeric adhesive with adjacent layers being bonded together at confronting surfaces by the polymeric adhesive.Type: GrantFiled: June 21, 1962Date of Patent: December 7, 1976Assignee: E. I. Du Pont de Nemours and CompanyInventors: Harold C. Bice, Manville I. Bro, John R. Dalton
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Patent number: 3985592Abstract: 1. A surface-inhibited propellent charge comprising a charge of propellent composition having bonded to at least part of its surface an inhibiting layer comprising silicone rubber supported on biaxially-stretchable glass fabric.Type: GrantFiled: June 11, 1968Date of Patent: October 12, 1976Assignee: Imperial Chemical Industries LimitedInventors: Clarence Bertram Hackett, James Jack, Richard Paton Reynolds
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Patent number: 3965676Abstract: 1. In combination with a vessel forming a rocket motor combustion chamber, a rubber-base liner having one surface firmly adhering to the chamber, the opposite surface of said rubber-base liner having a plurality of discrete powder grains partially embedded therein, each of said powder grains having a portion extending from said opposite surface of said rubber-base liner, and a propellant charge substantially filling the lined portion of said chamber, said propellant charge firmly adhering to said liner and enveloping each of said extending portions of said powder grains.Type: GrantFiled: October 2, 1961Date of Patent: June 29, 1976Assignee: Olin CorporationInventor: Otto G. Schaffling
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Patent number: 3947301Abstract: 1. An explosive slurry composition comprising a substantially saturated solution of ammonium nitrate, and suspended solids in said solution to form said slurry, said solids being comprised of at least 50 parts by weight of ammonium nitrate, and not more than 50 parts by weight of finely divided metallic aluminum of character such as to increase the sensitivity of said composition to detonation, the total nitrate comprising at least 50% of the total composition, said composition including water comprising at least 3 percent by weight of the total composition. 2. An ammonium nitrate explosive composition consisting essentially of particulate ammonium nitrate in admixture with an aqueous solution saturated with respect to ammonium nitrate, and with up to 35 per cent by weight of an inorganic sensitizer which taken alone is a stable solid at a temperature of at least 100.degree.C., the amount of water being from 3 to 25 per cent by weight of the total composition. 3.Type: GrantFiled: January 5, 1959Date of Patent: March 30, 1976Assignee: The Dow Chemical CompanyInventors: Joseph R. Hradel, Harold E. Staadt
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Patent number: H464Abstract: A molten metal-liquid explosive device comprising:(1) a metal casing enclosing an inner space;(2) a fusable metal wall dividing the inner space into a liquid chamber and pyrotechnic material chamber;(3) a liquid (e.g., water) contained in the liquid chamber;(4) a pyrotechnic material essentially comprising an intimate mixture of(a) a magnesium nickel alloy hydride of the formula MgNi.sub.x H.sub.y wherein 0<.times..ltoreq.0.50 and 1.50.ltoreq.y.ltoreq.2.00 and(b) a oxidizer selected from the group consisting of CuO, Li.sub.2 O.sub.2, BaO.sub.2, and mixtures thereof;wherein the molar ratio of oxidizer to magnesium nickel alloy hydride (MgNi.sub.x H.sub.y) is from about 0.75:1 to about (1.50+0.5y):1 andwherein the pyrotechnic material is contained in the pyrotechnic material chamber in an amount sufficient to melt the fusable metal wall dividing the liquid chamber and the pyrotechnic material chamber; and(5) means for igniting the pyrotechnic material.Type: GrantFiled: April 9, 1987Date of Patent: May 3, 1988Assignee: The United States of America as represented by the Secretary of the NavyInventors: Woodrow W. Lee, Alexander G. Rozner, James C. Waldron