US Government As Represented by the Secretary of the Army

Omnitek Partners Lcc

United States of America As Represented by the Secretary of the Air Force

Johns Hopkins University

Jay C Poret

Anthony P Shaw

Jahangir S Rastegar

Richard T Murray

Lori J Groven

Andrew Zimmer

Gretel Raibeck

Brandon Andreola

Jason Brusnahan

Zhaohua Luan

Joseph J Suter

Christopher D Haines

Lauren Morris

Joshua Koenig

Jesse J Sabatini

Terry E Phillips

Christopher Csernica

Gary Chen

Richard C Benson

Mark Motyka

Russell N Broad

Thomas R Sanderson

Eric J Miklaszewski

The present invention is a pyrotechnic time delay system that is improved over prior-art designs. Specifically, the system described herein comprises at least one delay element. The delay element or delay elements each have an input charge, a delay composition, and an output charge. Both the input charge and the output charge are igniter compositions and are comprised of the same components despite having different functional goals. The input charge and output charge compositions preferably contain titanium, manganese dioxide, and polytetrafluoroethylene. The delay composition may be modified from current formulations to include manganese and manganese dioxide, or tungsten and manganese dioxide. The system disclosed herein may be comprised of one delay element, or it may be modular wherein multiple delay elements are connected in series.

Pyrotechnic delay element device

The present invention is a pyrotechnic time delay system that is improved over prior-art designs. Specifically, the system described herein comprises at least one delay element. The delay element or delay dements each have an input charge, a delay composition, and an output charge. Both the input charge and the output charge are igniter compositions and are comprised of the same components despite having different functional goals. The input charge and output charge compositions preferably contain titanium, manganese dioxide, and polytetrafluoroethylene. The delay composition may be modified from current formulations to include manganese and manganese dioxide, or tungsten and manganese dioxide. The system disclosed herein may be comprised of one delay element, or it may be modular wherein multiple delay elements are connected in series.

A flare including: a casing; and a grain assembly, at least a portion of the grain assembly being slidably disposed in the casing, the grain assembly including: a shell structure; and a grain component at least partially disposed in the shell structure, the grain component including at least one combustible material and at least one reactive material positioned relative to the combustible material and configured to ignite combustion of the at least one combustible material; wherein the shell structure includes one or more fins at an aft end of the shell structure, the one or more fins being restrained into a first shape in the casing and configured to have a second shape, different from the first shape, when the restraint is removed.

Countermeasure flares

A flare including: a casing; and a grain assembly, at least a portion of the grain assembly being slidably disposed in the casing, the grain assembly including: a shell structure; and a grain component at least partially disposed in the shell structure, the grain component including at least one combustible material and at least one reactive material positioned relative to the combustible material and configured to ignite combustion of the at least one combustible material; wherein the shell structure includes one or more nozzles at an aft end of the shell structure for generating a thrust resulting from ignition of the at least one combustible material.

System and methods for simultaneous characterization of tracer light output and velocity by arranging a plurality of photodetectors along the flight path of the tracer and transmitting the detected light output over large distances using an array of analog/digital converter units arranged to correspond to each photodetector. The system can be scaled and configured to operate and control the photodetectors from a remote location.

System and method for characterization of tracer light output and velocity

A novel pyrotechnic composition comprising nanostructured crystalline boron phosphide and oxidizer such as potassium nitrate wherein the crystalline boron phosphide is synthesized by a self-propagating high-temperature reaction. The nanostructured crystalline boron phosphide and oxidizer pyrotechnic composition unexpectedly emits smoke and green flame upon ignition.

Pyrotechnic compositions comprising nanostructured crystalline boron phosphide and oxidizer

A simplified method for synthesizing boron phosphide at high yields. The method requires mixing of boron phosphate and magnesium metal without diluents into a homogenous mixture, loosely packing the mixture at less than 20,000 psi and igniting the mixture using an energy input that is not greater than 20% of the reaction energy output to create a self-propagating high-temperature reaction wherein the boron phosphate and magnesium metal is completely burned during the reaction to synthesize boron phosphide at high yields.

High-yield synthesis of nanostructured boron phosphide by a pyrotechnic method

Methods and devices for ejecting a grain assembly from a casing of a flare. Where a combustible material in the casing is ignited to eject the grain assembly and one or more of the following features are provided to the device: imparting a spin on the grain assembly after it is ejected from the casing, stabilizing a flight of the grain assembly or generating a thrust from an aft end of the grain assembly.

A precise, slow burning, pyrotechnic delay composition composed of a ternary system of from about 8 to about 55 weight percent BC fuel, 35 to about 82 weight percent NalOoxidizer, and PTFE which acts as a pyrotechnic oxidizer and lubricant&#x2014;such that the resulting composition has surprisingly good mechanical properties, i.e. it can be pressed to a desirably high consolidated density with ordinary loading force, and with minimal wear on the tooling used for pressing.

Boron carbide pyrotechnic time delay

An environmentally safe, nontoxic energetic time delay composition useful in small diameter aluminum tubes (i.e., typical military delay housings), which provides desired delay propagation rates of from less than about 2 to about 38 mm/s through such delay housings&#x2014;the compositions being compressed stoichiometric mixes of Ti and C powders; Ni and Al powders; a combination of Ti/C and 3Ni/Al powders; and a combination of Ti/C and Ni/Al powders, diluted with inert alumina.

Condensed phase energetic time delay compositions

Boron-containing, green light emitting pyrotechnic compositions that advantageously do not include barium, perchlorate or chlorinated organic compounds.

Green light emitting pyrotechnic compositions

A perchlorate-free solid pyrotechnic flash bang composition is disclosed, which comprises an oxidizer component selected from the group comprising potassium nitrate, strontium nitrate, and basic copper nitrate and combinations thereof, a metallic fuel component selected from the group comprising aluminum, magnesium, magnesium-aluminum alloys, silicon, zirconium, and combinations thereof, and a non-metallic fuel component comprising sulfur. The flash bang pyrotechnic composition may also further comprise a ballistic accelerant component, a pH stabilizer, and a free flow/anti-caking component.

Perchlorate free flash bang compositions for pyrotechnic training rounds

A pair of interleaved finger-like electrodes are positioned over a pyro-electric sheet of polyvinylidine fluoride and a pair of coatings are formed upon the electrodes having different optical reflectance, and as a result, a light beam energy absorption differential will be produced between the coatings and the resulting change in temperature in the sheet material under the electrodes will cause a voltage to be generated. A differential amplifier is connected across the electrodes to sense this voltage, indicative of the detection of an incoming laser light beam. A light chopper is positioned to interrupt the light beam directed at a portion of the pyro-electric sheet.

Narrow band optical radiation sensor using pyroelectric material

An ionizing radiation detector employs optical fibers as the medium for sensing ionizing radiation emitted by a radioactive source. Light in the infrared region is pumped continuously through an optical fiber located in an area or region where the unintentional discharge of ionizing radiation may be expected, so that such emission is detected the moment it occurs. The source of optical light emits a constant output within a specific wavelength band which changes only when irradiation of the fibers by ionizing radiation causes their internal color centers to change. The output of the fibers is optically coupled to a photomultiplier via a light pipe. A single light source, detector, and associated electronics complete the system. A hand-held unit unique for remote sensing may house these components. Due to safety conditions, these components are located at a point remote from the position liable to become under the influence of the radiation exposure field. Annealing of that portion of the optical fiber influenced by irradiation field restores the exposed portion of the optical fiber to substantially its previous level of sensitivity thereby reversibly establishing the fiber optic for any subsequent exposure. In response to particle bombardment from a cobalt-60 source, the detector reacts to the energy remaining after passage of the beam through a shielding enclosure, thereby giving a reliable indication of the shielding effectiveness of the enclosure.

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Sparta, NJ, United States of America

Jay C Poret