Abstract:
The present invention is directed to an age-stabilized and/or strengthened ammonium nitrate propellant composition wherein the strengthening agent is selected from the group consisting of azodicarbonamide, dicyandiamide, oxamide and mixtures thereof and wherein the age-stabilizing agent is a molecular sieve having a pore size of 13 angstroms or less.
Abstract:
A fire suppression system for a substantially enclosed area comprises: a plurality of solid propellant aerosol generators disposed about the enclosed area for exhausting a fire suppressant aerosol that is substantially void of an ozone depleting material into the enclosed area. Each aerosol generator including an ignition element for igniting the solid propellant thereof. Each ignition element of the aerosol generators being coupled to a fire control unit which is operative to ignite the solid propellant of at least one aerosol generator utilizing the ignition element thereof to exhaust fire suppressant aerosol into the enclosed area. Each aerosol generator preferably includes a container which comprises: a housing including an orifice for exhausting the fire suppressant aerosol; a solid propellant disposed inside of the housing; at least one cover mounted to the housing to seal correspondingly at least one open side thereof; an ignition material coupled to the solid propellant for igniting the solid propellant to produce the fire suppressant aerosol; and at least one baffle disposed integral to the housing to capture non-usable effluent.
Abstract:
The invention relates to flame suppression compositions including an inorganic halogen-containing component including bromine, iodine, or a mixture thereof, and an organic binder system having a heat of formation of less than about 200 cal/g, wherein the composition is solid at a temperature below 100.degree. C. and combusts at a temperature between about 160.degree. C. to 1200.degree. C. to produce a plurality of reaction products capable of suppressing a flame upon application thereto and wherein substantially all the halogen is converted to a solid form after suppressing the flame. The invention also relates to methods of suppressing flames by combining an inorganic halogen-containing component including bromine, iodine, or a mixture thereof, with an organic binder system having a heat of formation of less than about 200 cal/g to form a solid composition, generating a plurality of reaction products from the composition in a substantially gaseous form, wherein the reaction products have a velocity, and applying the reaction products at a temperature of between about 160.degree. C. to 1200.degree. C. to at least one flame in an amount sufficient to suppress the flame, wherein substantially all the halogen is solid after suppressing the flame.
Abstract:
A carbide coating for a surface intended to be subjected to stringencies of temperature and erosion, such as rocket nozzles, turbine blades, heat shields, and hypersonic structures, formed on a carbon substrate from a halide of hafnium, silicon, tantalum or zirconium, followed by deposition from a said halide and a hydrocarbon. The layer has a high melting point, can be made very thin, and resists cracking and spalling.
Abstract:
A pyrotechnic composition comprising a mixture of finely divided magnesium and silicon dioxide, both distributed throughout a binder selected from the members of the group consisting of polybutadienes and teflon. The composition is suitably insensitive, and yet readily ignitable, and does not require the use of solvents or of expensive spheroidal magnesium granules for its manufacture.
Abstract:
The present invention is directed to an age-stabilized and/or strengthened ammonium nitrate propellant composition wherein the strengthening agent is selected from the group consisting of azodicarbonamide, dicyandiamide, oxamide and mixtures thereof and wherein the age-stabilizing agent is a molecular sieve having a pore size of 13 angstroms or less.
Abstract:
The present invention is directed to an age-stabilized and/or strengthened ammonium nitrate propellant composition wherein the strengthening agent is selected from the group consisting of azodicarbonamide, dicyandiamide, oxamide and mixtures thereof and wherein the age-stabilizing agent is a molecular sieve having a pore size of 13 angstroms or less.
Abstract:
A void-sensing fuze whose initiation is deferred until after impact forces have terminated. A safety device safeties the fuze until after the ordnance has fired. Thereafter, upon impact the fuze is committed to fire, but fires only after impact forces have terminated.
Abstract:
A pyrotechnic composition produced by mixing and permitting to cure a mixture of aluminum, calcium sulfate, magnesium sulfate, and water. Increased heat output and density and improved ignitability result, while exotherm during curing can substantially be eliminated.
Abstract:
A method and a device for producing a sufficient quantity of a fire suppressing gaseous product to substantially suppress a fire. The device has a first stage gas source containing a pyrotechnic gas generating material and a second stage gas source in fluid communication at a first location with an outlet of the first stage gas source and, at a second location, with an outlet for dispersing gas. The second stage gas source contains at least one liquified gas or supercritical carbon dioxide, where the first stage gas source is capable of providing a sufficient quantity of gas at a sufficiently high temperature to vaporize at least a portion of the liquified gas or supercritical carbon dioxide in the second stage gas source, thereby producing a fire suppressing gaseous output, which exits the device through the outlet for dispersing gas, in an amount sufficient to at least partially suppress a fire. At least one of the pyrotechnic gas generating material, the liquified gas, and the supercritical carbon dioxide is mixed with or includes at least one fire suppressant material selected from the group consisting of elemental halogens and alkali metal halides.