Pyrotechnics Patents (Class 102/335)
  • Patent number: 7154429
    Abstract: A heat seeking missile decoy device mounted on a military vehicle to change the infrared signature of the military vehicle. The device is at ambient temperature when stored on the military vehicle. When a heat seeking missile is fired at the military vehicle, the decoy device deploys and increases in temperature, changing the infrared signature of the vehicle and causing a hot spot away from vulnerable components of the vehicle. The hot spot radiates in the infrared in an area that is away from vulnerable parts of a military vehicle, drawing the heat seeking missile toward it. The termination trajectory of the heat seeking missile is at the end of the decoy device and not the vulnerable parts of the military vehicle. The energy required to heat the device is passive waste energy from the vehicle engine exhaust.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: December 26, 2006
    Inventor: Charles C. Roberts, Jr.
  • Patent number: 7140301
    Abstract: A temporary airborne image is formed by the steps of arranging a plurality of projectiles in each of one or more barrel assemblies wherein the projectiles include image forming matter; firing a predetermined number of the plurality of projectiles from selected barrel assemblies; and deploying the image forming matter to form a temporary airborne image.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: November 28, 2006
    Assignee: Metal Storm Limited
    Inventor: James Michael O'Dwyer
  • Patent number: 6848366
    Abstract: A binary exploding target package, a process of forming an exploding target from the contents of the binary exploding target package, and the exploding target formed therefrom. The binary exploding target package includes a first, target container and a second container. An oxidizer composition is contained within one of the containers and a catalyst composition is contained within the other container. An exploding target is formed by mixing the oxidizer and catalyst compositions, and introducing the mixture into the target container to form an exploding target just prior to using the exploding target as a target for a shooting exercise.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: February 1, 2005
    Inventor: Daniel Jeremy Tanner
  • Patent number: 6845715
    Abstract: An explosion simulator including a chamber at least partially filled with a pyrotechnic material, the chamber being formed with a plurality of holes arranged for fluid products of an explosion of the pyrotechnic material to pass therethrough, and a delaying detonator adapted to detonate the pyrotechnic material, the detonator being adapted to delay onset of the explosion of the pyrotechnic material a period of time after actuation of the detonator.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: January 25, 2005
    Inventor: Arie Sansolo
  • Patent number: 6840177
    Abstract: A fireworks device, including a number of light effect devices as a replacement for traditional pyrotechnic stars. Each light effect device includes electrical/electronic light sources, preferably high-intensity light-emitting diodes, an energy-storage device and a control device. The light effect device for use in such a fireworks device can be used together with a fireworks system, a fireworks rocket and a ground firework in which the firework device is included.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: January 11, 2005
    Assignee: Jakob Hatteland Kjemi AS
    Inventor: Jakob Hatteland
  • Patent number: 6792867
    Abstract: Fluoroalkylsilane-coated metal particles having a central metal core, a buffer layer surrounding the core, and a fluoroalkylsilane layer attached to the buffer layer are prepared by combining a chemically reactive fluoroalkylsilane compound with an oxide coated metal particle having a hydroxylated surface. The resulting fluoroalkylsilane layer that coats the particles provides them with excellent resistance to aging. The particles can be blended with oxidant particles to form energetic powder that releases chemical energy when the buffer layer is physically disrupted so that the reductant metal core can react with the oxidant.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: September 21, 2004
    Assignee: The Regents of the University of California
    Inventors: Betty S. Jorgensen, Wayne C. Danen
  • Publication number: 20040159259
    Abstract: A pyrotechnic display device configured to ignite solid pyrotechnic compositions or aerial shells within a launch tube prior to propelling them on a desired arc. A smokeless pyrotechnic propelling charge is disposed within the launch tube below the solid pyrotechnic compositions, and separated therefrom. An ignition source is disposed in operative relationship to the pyrotechnic compositions or aerial shells, which are ignited prior to ignition of the smokeless pyrotechnic propelling charge.
    Type: Application
    Filed: February 19, 2004
    Publication date: August 19, 2004
    Inventors: Ronald R. Walker, Russell R. Nickel
  • Patent number: 6730028
    Abstract: A method and device for forming artificial openings in a biological membrane with a pyrotechnic charge that is exploded in a controlled manner in proximity of the biological membrane to form the artificial opening(s) therein. The method and device are useful in connection with transdermal delivery and monitoring applications.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: May 4, 2004
    Assignee: Altea Therapeutics Corporation
    Inventors: Jonathan A. Eppstein, Michael R. Hatch, Joseph Papp, Mark L. Faupel, Krishna Kumar
  • Patent number: 6718882
    Abstract: A sparkler for use as a fireworks display is provided. The sparkler has an extended spark display time, burning and emitting sparks in one direction initially followed by the spark progression reversing direction and then burning while emitting sparks in the reverse direction. The sparkler construction provides inner and outer sheaths of a flammable spark composition separated by an insulating layer of a fire resistant material. The inner and outer layers are in contact with one another at one end of the sheath, to permit ignition of the inner flammable composition by the progressing spark. Especially preferred is a construction of the aforesaid sparkler which emits sparks of one color upon the initial burn and sparks of a different color upon the reverse burn. Also provided is a process for the manufacture of these novel sparklers.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: April 13, 2004
    Assignee: Hunter Pacific Limited
    Inventor: Qui Fu Sheng
  • Publication number: 20040045471
    Abstract: The Fire Cup takes an ordinary fire cracker and really allows you to see the blast. The Fire Cup is safe enough for even your children to use under adult supervision. The Fire Cup and some basic fire crackers is all you will need to but, for you and your family to enjoy hours of entertainment. The Fire Cup is so well made it can be used over and over again. So pick one up today and experience the blast of the one and the only “FIRE CUP”.
    Type: Application
    Filed: September 3, 2002
    Publication date: March 11, 2004
    Inventors: Joseph Patrick Lucero, Kelly Jane Lucero, Joseph Patrick Lucero, Brandon Scott Lucero
  • Publication number: 20030145752
    Abstract: A portable metal-cutting pyrotechnic torch comprising a solid thermite fuel for pyrotechnics, an igniter and a thermally non-conducting handle. Further provided is a tubular body which preferably burns away with the composition.
    Type: Application
    Filed: February 5, 2002
    Publication date: August 7, 2003
    Inventor: Greg Carter
  • Publication number: 20030131750
    Abstract: The invention relates to a tow body for representing a flying target by means of infrared flares, the infrared flares being situated on the rear of the tow body and being ejectable by the tow body and being pulled by the tow body by means of a reel-off towing cable during burning time. According to the invention, a drop unit (1) for the burned-up IR flares is arranged on the rear of the tow body, which drop unit (1) comprises a circular receiving unit (7) which is rotatably disposed and constructed under a retaining plate (8), for the towing cable nipples (17) forming the tow-body-side end of the towing cable, after the burning-up of an infrared flare, the corresponding towing cable nipple (17) connected with the infrared flare being released by a rotation of the receiving unit (7).
    Type: Application
    Filed: August 9, 2002
    Publication date: July 17, 2003
    Inventor: Peter Weimer
  • Publication number: 20030127010
    Abstract: Barrel assembly (10) includes rifled barrel (11) loaded with several pyrotechnic projectiles (12) for selective firing by an electronically controlled system. Each projectile (12) includes body (14), housing (15) containing pyrotechnic material (16), and trailing collar (17) supported on trailing hub (18) of body (14) for limited axial movement. Collar (17) includes leading wall (20) abutting trailing wall (21) of housing (15) and an internally tapered thickened rear part (24) engaging nose (25) of trailing projectile (12) to wedge into sealing engagement with barrel (11). Hub (18) supports propellant capsule (30) connected by electrical leads (31) to contacts (32) on outer cylindrical wall (33) of housing (12). Complementary contacts (34) are supported in barrel (11). Alignment of contacts (34) with contacts (32) occurs during the loading process. Fuse (35) extends between capsule (30) and primer (36) so that material (16) explodes a set time after firing projectile (12) from barrel (11).
    Type: Application
    Filed: November 25, 2002
    Publication date: July 10, 2003
    Inventor: James Michael O'Dwyer
  • Publication number: 20030033952
    Abstract: The idea of an exploding target which is sold in “two parts” and is not classified as an explosive until a catalyst is added to the main target, is a completely unique idea which increases the safety of the exploding target and also allows the product to be safely shipped in a “non-hazardous” form. The benefits of this “binary” approach are obvious. Law enforcement and qualified ranges will have a safer reactive target to shoot at during qualification and the targets aren't bound to restrictive storage requirements as set forth by Code of Federal Regulations.
    Type: Application
    Filed: August 20, 2001
    Publication date: February 20, 2003
    Inventor: Daniel Jeremy Tanner
  • Publication number: 20020144620
    Abstract: A closure for a pyrotechnic unit ensures that upon the build-up of pressure of a pyrotechnic charge (24) no pieces which fly off occur. That is achieved in that the cover (4) has a desired-rupture location (32) in the form of a circular ring, except for a portion (14), wherein the residual cover (36) which tears open is non-detachably connected to the cover (4).
    Type: Application
    Filed: April 4, 2002
    Publication date: October 10, 2002
    Applicant: Comet GmbH Pyrotechnik-Apparatebau
    Inventors: Werner Scherer, Harald Friedmann
  • Publication number: 20020117071
    Abstract: This invention is for an improved sparkler which has the feature of being self-igniting. The sparkler comprises a rod 12 having one end which functions as a handle 14. Adjacent to the handle 14 on the rod 12 and extending generally along the remaining length of the rod 12 is a pyrotechnic composition coating 16. Bonded to the pyrotechnic composition coating 16 at a point furthest from the handle 14 is a self-igniting match head tip 18. When the match head tip 18 is struck against a suitable surface, ignition occurs and the sparkler's display begins. This self-ignition feature distinguishes the invention from the sparklers currently available which require heat or flame from an external source to be applied to the sparkler to cause ignition.
    Type: Application
    Filed: March 26, 1997
    Publication date: August 29, 2002
    Inventor: JOHN M. KALISZEWSKI
  • Publication number: 20010054366
    Abstract: A method of providing safety for pyrotechnic launch devices of the type having a least one tilt detection device 10 & 20. Having a means of attaching said tilt detection device(s) 10 & 20 to the launch device(s). Having a means of disabling launches from launch device(s) when at least one of said tilt detection device(s) 10 & 20 detects that the launch device it is attached to is tilted beyond tolerances.
    Type: Application
    Filed: February 2, 2001
    Publication date: December 27, 2001
    Inventors: Charles Roger Hutchins, William Lee Foster
  • Patent number: 6324955
    Abstract: An explosive countermeasure device is designed to negate an electro-optical seeker system of a missile at least temporarily so that it loses lock on a target aircraft. The device has a central explosive charge with a detonator and a container surrounding the charge for holding a noble gas under pressure. When the charge is detonated, the resultant explosive shock wave will heat the gas to a temperature sufficient for it to emit a short, intense flash of light before the container disintegrates, blinding the electro-optical seeker system at least temporarily.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: December 4, 2001
    Assignee: Raytheon Company
    Inventors: Norman H. Andersson, Emery S. Almasy
  • Patent number: 6230628
    Abstract: An infrared illuminating composition comprising approximately 70 weight % of an oxidant evidencing strong emission in the NIR region selected from the group consisting of potassium nitrate, cesium nitrate and mixtures thereof; 9 weight % of a metallic fuel evidencing low visible light emission, 4 weight % of an epoxy resin binder, 16 weight % of a NIR light enhancer and 1% by weight of an additive selected from the group consisting of a double base propellant material, a triple base propellant material and mixtures thereof.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: May 15, 2001
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Patricia L. Farnell, Russell Broad, Stuart Nemiroff
  • Patent number: 6190475
    Abstract: Compositions are provided which, when burned, produce significant levels of infrared radiation, but only limited levels of visible radiation. The basic components of the compositions include a binder, an oxidizer, and a fuel, where the binder also acts the fuel. Preferred oxidizers include those compounds which produce large quantities of infrared radiation when the flare composition is burned. Such oxidizers include potassium nitrate, cesium nitrate, rubidium nitrate, and combinations of these compounds. Selection of the binder is important in order to provide the composition with the desirable characteristics identified above. The binder of the present invention does not produce significant soot. At the same time, the binder serves to form a composition which is processible, avoids chunking, and is compatible with the oxidizers used. It has been found that polymer binders which include relatively short carbon chains (1-6 continuous carbon atoms) are preferred.
    Type: Grant
    Filed: January 6, 2000
    Date of Patent: February 20, 2001
    Assignee: Cordant Technologies Inc.
    Inventor: Daniel B. Nielson
  • Patent number: 6123789
    Abstract: Compositions are provided which, when burned, produce significant levels of infrared radiation, but only limited levels of visible radiation. The basic components of the compositions include a binder, an oxidizer, and a fuel, where the binder also acts the fuel. Preferred oxidizers include those compounds which produce large quantities of infrared radiation when the flare composition is burned. Such oxidizers include potassium nitrate, cesium nitrate, rubidium nitrate, and combinations of these compounds. Selection of the binder is important in order to provide the composition with the desirable characteristics identified above. The binder of the present invention does not produce significant soot. At the same time, the binder serves to form a composition which is processible, avoids chunking, and is compatible with the oxidizers used. It has been found that polymer binders which include relatively short carbon chains (1-6 continuous carbon atoms) are preferred.
    Type: Grant
    Filed: February 10, 1995
    Date of Patent: September 26, 2000
    Assignee: Cordant Technologies Inc.
    Inventor: Daniel B. Nielson
  • Patent number: 5824945
    Abstract: A distraction device having a fuse assembly and a body which body has a sealed storage area for energetic pyrotechnic material. The device when operated produces noise and light without ejecta or forces of propulsion.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: October 20, 1998
    Assignee: Universal Propulsion Company, Inc.
    Inventors: Stanley J. Barlog, Michael C. Magenot, Wilburn C. Roberts
  • Patent number: 5811724
    Abstract: A pyrotechnic composition that emits essentially only infrared radiation upon combustion contains at least one peroxide component, an oxidizer that is more energetic than the peroxide component, a coolant, a binder and silicon. In one embodiment, the peroxide component is a mixture of strontium peroxide and barium peroxide, the oxidizer more energetic than the peroxide component is barium nitrate, the coolant is magnesium carbonate, the binder is calcium resonate and the silicon has a minimum purity of 99.9%. The pyrotechnic composition is useful as the combustible component of an infrared tracer.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: September 22, 1998
    Assignee: Primex Technologies, Inc.
    Inventors: Guy H. Henry, III, Michael A. Owens, Jarrett L. Terry, Mark A. Tucker, Frank M. Bone
  • Patent number: 5700971
    Abstract: A rapid-release smoke hand grenade comprising a manually actuatable igniter head (A) and an active mass member (B), wherein the striker located on the igniter head to initiate the chain of pyrotechnical activity is loaded by means of a safety clip so as to be safe to handle, the smoke-forming means located in the active mass member is in the form of combustible disc-shaped or disc sector-shaped thin leaves (flares) coated with smoke-forming agent based on red phosphorus which practically fill the canister of the active mass member around a capsule for the ignition/bursting unit located therein, the heavy components of this rapid-release smoke hand grenade are held together by connecting elements which are stable when it bursts, and the essential components of the grenade preferably consist of aluminium.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: December 23, 1997
    Assignee: Buck Werke GmbH & Co.
    Inventors: Peter Rayer, Norbert Wardecki, Karl Raupp
  • Patent number: 5663523
    Abstract: A propellant composition comprising an admixture of a first hydrogen rich material and a second metal material which is capable of reacting exothermically with the first material. The ratio of the first material to the second material is selected such that the exothermic reaction forms a solid phase and a gas phase which contains substantial amounts of hydrogen. Preferably, the first hydrogen rich material comprises a material capable of providing nitrogen upon decomposition thereof, and the second metal material comprises a material capable of reacting exothermically with the nitrogen generated by the decomposition of the first material such that the solid phase comprises a solid nitride of the second metal material.In a preferred embodiment, the first material comprises ammonium azide, and the second material comprises boron, titanium, titanium hydride, or mixture thereof.
    Type: Grant
    Filed: June 25, 1996
    Date of Patent: September 2, 1997
    Assignee: Martin Marietta Corporation
    Inventor: Laurence O. Williams
  • Patent number: 5501751
    Abstract: The present invention is directed to the encapsulation of pyrophoric materials in a high temperature resistant membrane having at least one perforation which allows air to contact the pyrophoric material. By controlling the accessibility of the pyrophoric material to the surrounding air, it is possible to reduce the kinetics of the oxidation reaction without affecting the thermodynamics of the reaction. This results in a product that demonstrates a lower peak temperature, longer dwell time at the lower temperature and, in most cases, an increase in the total heat energy output in comparison to an identical pyrophoric material that is not so encapsulated.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: March 26, 1996
    Assignee: Alloy Surfaces Co. Inc.
    Inventors: Alfonso L. Baldi, Frank J. Clark
  • Patent number: 5259289
    Abstract: A munitions launcher comprising a plurality of ejector assemblies each suitable for receiving a munition, and a base made of thermoplastic material molded over a portion of the periphery of the various ejector assemblies and over the rear thereof.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: November 9, 1993
    Assignee: Etienne Lacroix Tous Artifices S.A.
    Inventors: Francis Peries, Herve Tustes
  • Patent number: 5138948
    Abstract: A cylindrical metal end cap is formed over one end of a thermoplastic tubular casing. A pyrotechnic detonator is ohmically connected to the end cap via an aperture thereof and includes an electrically activated match. The detonator is soldered to the end cap with a solder ring simultaneously with the insertion of the detonator into the end cap aperture to form a hermetic seal. A thermoplastic end cap is heat welded to the other end of the casing to hermetically seal the pyrotechnic material within the casing. The heat welding occurs at the outer surface of the casing and at a temperature lower than the ignition temperature of the pyrotechnic material in the casing. The position of the match within the casing is selected to cause the pyrotechnic material to burn toward the metal end cap to enhance flash production, different length casings producing different flash intensities.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: August 18, 1992
    Assignee: Joanell Laboratories, Inc.
    Inventors: Joseph L. La Mura, Ronald C. Wallenburg
  • Patent number: 5036769
    Abstract: An electrically controllable "Pyrofuze" pin device for ordnance device acation which functionally replaces the mechanical barrier and arming wire or other rigid and removable means used to provide ordnance device activation. The device includes a "Pyrofuze" pin, a connecting ignitor transfer charge, and ignitor, and electrical terminals to provide power from an external power supply, and a weatherproof housing. When electrically activated the "Pyrofuze" pin is reduced to molten by-products which functionally eliminate the mechanical barrier and permits the activation of the ordnance device.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: August 6, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: James M. Schaff, Amos J. Diede
  • Patent number: 4983234
    Abstract: A composition comprising phosphorus and a minor amount of at least one radical inhibitor selected from 4-(p-n-trophenyl-azo)-1-naphthol and mono and fused bi- and tri-cyclic compounds bearing at least a first and a second substituent, the first substituent being selected from hydroxy, mercapto, oxo, thioxo, the second substituent being selected from hydrogen, hydroxy and mercapto when the first substituent is hydroxy or mercapto and from oxo and thioxo, when the second substituent is oxo or thioxo, the second substituent being located on the same ring and ortho or para to the first substituent, other than anthraquinone or a substituted anthraquinone has reduced levels of phosphine emission. Munitions containing the composition as the charge are less susceptible to corrosion.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: January 8, 1991
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: John F. Alder, John J. McCallum
  • Patent number: 4799666
    Abstract: An amusement device comprises two ball members. One or both have a hard surface coated with a material that explodes when it impacts with another ball at the site of the impact. The coatings comprises by weight to the weight of the coating before application to the ball members 62%-65% of potassium chlorate as an oxidant, 12%-15% amorphous sulphur as a combustible, 10% and 14% each by weight of casein glue as and inhibitor adhesive and arabic gum as and adhesive inhibitor. The coating also includes approximately 1% by weight of a sodium or calcium carbonate compound to act as a neutralizer. The ball members are made of a non-vitrified porcelain, about 1 inch in diameter and have a maximum porosity of 3%.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: January 24, 1989
    Assignee: Omranco International Corporation
    Inventor: Luis E. Obligio
  • Patent number: 4719856
    Abstract: The pyrotechnic device comprises a projectile, a ground mounted device or a floating device whose casing contains a charge of titanium or other suitable combustible metal-containing material, charcoal, or other reducing agent and gunpowder such that, following ignition, infra-red emitting particles are emitted to form an infra-red radiating screen. The carbon reduces oxidation of the combustible material prior to emission.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: January 19, 1988
    Assignee: Pains-Wessex Limited
    Inventor: Nigel F. Joslin
  • Patent number: 4719857
    Abstract: The pyrotechnic device comprises a projectile, a ground mounted device or a floating device whose casing contains a charge of particulate material, for example a combustible silicon-containing material in particular mixed with titanium or other suitable combustible metal-containing material and gunpowder such that, following ignition, infra-red emitting particles are emitted for forming an infra-red radiating screen.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: January 19, 1988
    Assignee: Pains-Wessex Limited
    Inventor: David J. Spring
  • Patent number: 4461213
    Abstract: Pyrotechnic devices are described which are intended to emit an illuminating flux starting from multiple, exact, movable sources, particularly suitable for displays of artificial fireworks. The illuminating pyrotechnic devices consist of a shell which contains a block of a pyrotechnic composition consisting of at least a polymerized binder, an oxidizer and a combustible metal. For the purpose of achieving the bursting of the composition into a multitude of incandescent fragments when the device is ignited, the pyrotechnic composition consists of a binder of the phenoplastic type and an oxidizer, the granulometry of which is lower than 150 micrometers and the block, the smallest dimension of which is greater than 15 mm, has undergone a rapid cooling which gives rise to internal strains and fracture points within the composition.
    Type: Grant
    Filed: November 3, 1982
    Date of Patent: July 24, 1984
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Lucien Autret, Jean-Philippe Godfrin
  • Patent number: 4448130
    Abstract: A preformed cup for receiving and retaining pyrotechnic materials including provision for hermetic sealing against entry of disabling matter and moisture, to be inserted, after sealing, into a conventional casing in such manner as to maintain close proximity with ignition devices as provided in standard pyrotechnic systems. Close proximity of the contained pyrotechnic materials to an associated igniter is permissible with safety, regardless of the volume of material loaded or the "G" loads encountered. The device permits loading of hazardous pyrotechnic materials on an off-line basis, independently of final assembly of devices used as practice rounds in anti-armor missiles and the like.
    Type: Grant
    Filed: July 15, 1982
    Date of Patent: May 15, 1984
    Assignee: General Dynamics, Pomona Division
    Inventor: Spencer J. Speer
  • Patent number: 4302259
    Abstract: An improved pyrotechnic fuel composition comprising a metal fuel and a contional pyrotechnic oxidizer for producing light, heat, smoke and sound through an exothermic reaction wherein the improvement comprises the use of a metal hydride as the fuel ingredient to produce a pyrotechnic composition which readily ignites and which has a lower burning rate for increased luminous intensity. The metal hydride fuel is preferably selected from the group consisting of magnesium hydride, titanium hydride, sodium borohydride and a lithium aluminum hydride.
    Type: Grant
    Filed: October 31, 1979
    Date of Patent: November 24, 1981
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Joseph R. Ward
  • Patent number: 4267774
    Abstract: A hermetically-sealed pyrotechnic cap is described which includes a plastic (e.g. polyethylene) container and a quantity of pyrotechnic mixture therein. Closure of the container is achieved by heat-sealing an end thereof. A method for effecting the closure is also described.
    Type: Grant
    Filed: January 10, 1979
    Date of Patent: May 19, 1981
    Assignee: GTE Products Corporation
    Inventors: Harold H. Hall, Jr., Andre C. Bouchard, John W. Shaffer, Thomas L. Gavenonis