Fuse Patents (Class 102/275.9)
  • Patent number: 9610597
    Abstract: A system and method for tagging, tracking, locating and identifying people and vehicles transporting people using Perfluorocarbon tracers. An on-going problem faced by military as well as law enforcement personnel is that of friendly fire incidents. To prevent possible friendly-fire incidents, troops would separate the two layers of the uniform patch, thereby releasing a controlled release of the Perfluorocarbon vapors. Other “friendly” troops, equipped with sensors tuned to the specific perfluorocarbon characteristics would thus be able to literally view a plume around the tagged person or object. The system may conversely be used to tag enemies. Formulations of mixed perfluorocarbons may be used to provide coding of emissions.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: April 4, 2017
    Assignee: Copilot Ventures Fund III LLC
    Inventor: Jay Fraser
  • Patent number: 9285198
    Abstract: An ARM-FIRE device for a pyrotechnic system includes a first pyrotechnic, a second pyrotechnic, a passage extending between the first and second pyrotechnics, and an actuator/blocking device positioned between the first and second pyrotechnics. The first pyrotechnic is configured to be ignited by a heat source, and the second pyrotechnic is configured to be ignited by the first pyrotechnic in the FIRE arrangement. The actuator/blocking device includes a body configured to move between a first position in the SAFE arrangement and a second position in the FIRE arrangement, an aperture extending through the body, and an actuator. The aperture is offset from the passage in the first position of the body and is aligned with the passage in the second position of the body. The actuator is configured to move the body between the first and second positions. The first pyrotechnic, the second pyrotechnic, and the actuator/blocking device occupy a volume of approximately 49 cubic cm (3.0 cubic inches)or less.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: March 15, 2016
    Assignee: Pacific Scientific Energetic Materials Company
    Inventors: Steven D. Nelson, Robert S. Ritchie
  • Patent number: 9057712
    Abstract: A system and method for tagging, tracking, locating and identifying people and vehicles transporting people using Perfluorocarbon tracers. An on-going problem faced by military as well as law enforcement personnel is that of friendly fire incidents. To prevent possible friendly-fire incidents, troops would separate the two layers of the uniform patch, thereby releasing a controlled release of the Perfluorocarbon vapors. Other “friendly” troops, equipped with sensors tuned to the specific perfluorocarbon characteristics would thus be able to literally view a plume around the tagged person or object. The system may conversely be used to tag enemies. Formulations of mixed perfluorocarbons may be used to provide coding of emissions.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: June 16, 2015
    Assignee: Copilot Ventures Fund III LLC
    Inventor: Jay Fraser
  • Patent number: 8522682
    Abstract: The present disclosure relates to systems and methods for explosive systems such as grenades with novel micro-electromechanical systems (MEMS) fuze and novel placement of the MEMS fuze providing increased performance, reliability, and safety. The MEMS fuze is disposed towards a rear portion of the explosive system providing superior performance and design flexibility. Further, the explosive system includes electronics configured to implement a launch timer and to sense impact or when the system stops spinning. The present invention includes an operational method improving safety and reliability by preventing detonation until after the launch timer expires, upon impact, or when the explosive system stops spinning.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: September 3, 2013
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Kevin Genson, Daniel Jean, John Hendershot, Gerald Laib, David Olson, Ezra Chen, Veronica Badescu, Anthony Mansfield, Troy Caruso
  • Patent number: 8464639
    Abstract: A fuse booster system for a reduced collateral damage bomb or penetrating warhead is described and disclosed. The fuse booster system uses shaped charges that will ignite the main high explosive charge of the bomb or penetrating warhead, and also remove portions of the bomb or penetrating warhead to reduce the power of the bomb at the target in a measurable manner to control the lethality and collateral damage of the bomb or penetrating warhead.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: June 18, 2013
    Inventors: Blake K. Thomas, James D. Ruhlman
  • Publication number: 20130074723
    Abstract: A fuze includes a shell, a plunger a firing pin unit, a spring, a receptacle, a plurality of detents, a detonation unit and a restraint unit. The plunger is movably provided in the shell. The firing pin unit is movably provided in the shell, in the vicinity of the plunger. The spring is compressed between the plunger and the firing pin unit. The receptacle is provided in the shell and movably connected to the firing pin unit. The detents are movably provided between the firing pin unit and the receptacle. The detonation unit is movably provided in the receptacle opposite to the detents. The restraint unit is provided in the shell and movably connected to the detonation unit.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 28, 2013
    Applicant: Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense
    Inventors: Li-Tin Chiang, Chun-Wei Chiu, Kuei-Ju Lee
  • Patent number: 8297189
    Abstract: The invention relates to so-called fuze damping in projectiles, in particular, those provided with a built-in firing delay. Thus, a projectile (1) is provided having a rear part (1a) and a fuze (2), wherein at least one damping element (7) is inserted between a fuze base (5) and the projectile (1) and/or between a fuze shoulder (6) and a possible threaded ring (4), or similar attachment element. The damping element (7) is in the form of a disc, ring or pot, and is composed of a material with a lower acoustic impedance than the material of the projectile (1).
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: October 30, 2012
    Assignee: Rheinmetall Waffe Munition GmbH
    Inventors: Wolfgang Hoffmann, Wolfgang Scherge, Mathias Lengnick, Holger Brase, Stefan Kell, Torsten Niemeyer
  • Patent number: 8291826
    Abstract: A detonator assembly is provided. The detonator assembly comprises a deflagration to detonation transition body, a first thermally stable secondary explosive contained by the body, and a bulkhead coupled to the deflagration to detonation transition body. The bulkhead contains pressure within the body associated with firing the detonator assembly at least until a transition from a deflagration operation mode of the detonator assembly to a detonation operation mode of the detonator assembly has occurred. A second thermally stable secondary explosive may alternatively be included in the deflagration to detonation transition body, either separated from the first thermally stable secondary explosive or mixed with the first thermally stable secondary explosive. The detonator assembly comprises effectively no primary explosive.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: October 23, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Thomas J. Wuensche, James Barker, Gayle Moritz
  • Patent number: 8291827
    Abstract: A two-piece adapter for mounting a guidance system on unguided rockets allows for the existing designs and stores of unguided rockets to be retrofitted with guidance capability to provide a “guided rocket”. The adapter provides the external mounting features for mounting the guidance system and does so in a manner that transfers the steering loads of the guidance system to the rocket airframe and maintains the proper preloading and relationship of the fuze-to-warhead to detonate the warhead. The two-piece adapter comprises an inner adapter and an outer adapter. The inner adapter is secured between the fuze and warhead without requiring modifications of either part and provides the external mounting feature. The outer adapter is secured to the inner adapter and effectively moves the external mounting feature forward in front of the fuze where the guidance system is attached.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: October 23, 2012
    Assignee: Raytheon Company
    Inventors: Timothy B. Mellor, Eric Brogmus, George E. Dunn, Jr., Patrick Willems, Mark L Sedig
  • Patent number: 8286555
    Abstract: A detonator assembly is provided. The detonator assembly comprises a deflagration to detonation transition body, a first thermally stable secondary explosive contained by the body, and a bulkhead coupled to the deflagration to detonation transition body. The bulkhead contains pressure within the body associated with firing the detonator assembly at least until a transition from a deflagration operation mode of the detonator assembly to a detonation operation mode of the detonator assembly has occurred. A second thermally stable secondary explosive may alternatively be included in the deflagration to detonation transition body, either separated from the first thermally stable secondary explosive or mixed with the first thermally stable secondary explosive. The detonator assembly comprises effectively no primary explosive.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: October 16, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Thomas J. Wuensche, James Barker, Gayle Moritz
  • Patent number: 8234979
    Abstract: An apparatus for shock isolating an electronics package includes an outer member including an internal threaded portion and a transition member including an external threaded portion and a hollow inner portion that defines a cavity configured for receiving the electronics package. A layer of mechanically compliant shock isolation material is positioned between the inner thread portion of the outer member and the external thread portion of the transition member. The compliant shock isolation material encloses a front end and sidewalls of the transition member and is absent from its aft end to allow access to one end of the electronics package (e.g. to a connector). The internal threaded portion of the outer member and the external threaded portion of the transition member are compliantly engaged via a gap provided by the layer of compliant shock isolation material. In one embodiment the electronics package is a fuze assembly.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: August 7, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: David J. Falabella, Gary A. Simpson, Jonathan Dwight Wehking
  • Publication number: 20120175459
    Abstract: A projectile, air vehicle or submersible craft with a spinning or rolling fuselage, rotating on its axis, has a collar which can be positioned relative to a longitudinal axis of the projectile using aerodynamic forces. Aerodynamic surfaces, such as lift-producing surfaces, for example tails or canards, are coupled to the collar, and rotate with the collar. An actuator system or mechanism controls orienting of the lift-producing surfaces, such as tilting of the lift producing surfaces, to direct the collar into a desired position relative to a longitudinal axis of the projectile, and to maintain the collar in that position. With such a control the projectile is able to be steered using bank-to-turn maneuvering. The actuator system may use any of a variety of mechanisms to move the lift-producing surfaces, thereby positioning the collar.
    Type: Application
    Filed: September 7, 2011
    Publication date: July 12, 2012
    Inventors: Chris E. Geswender, Stevie Alejandro, Paul Vesty
  • Publication number: 20120175458
    Abstract: A projectile, air vehicle or submersible craft with a spinning or rolling fuselage, rotating on its axis, has a collar which can be positioned relative to a longitudinal axis of the projectile using aerodynamic forces. Aerodynamic surfaces, such as lift-producing surfaces, for example tails or canards, are coupled to the collar, and rotate with the collar. An actuator system or mechanism controls orienting of the lift-producing surfaces, such as tilting of the lift producing surfaces, to direct the collar into a desired position relative to a longitudinal axis of the projectile, and to maintain the collar in that position. With such a control the projectile is able to be steered using bank-to-turn maneuvering. The actuator system may use any of a variety of mechanisms to move the lift-producing surfaces, thereby positioning the collar.
    Type: Application
    Filed: January 12, 2011
    Publication date: July 12, 2012
    Inventor: Chris E. Geswender
  • Patent number: 8161881
    Abstract: A fuse and a fusing method comprising initiating detonation of a first booster comprising a circular shaped charge and thereby causing detonation of a second booster.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: April 24, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: George W. Brooks, Daniel J. Martorana, Jacob A. Diez, David Falabella
  • Patent number: 8161880
    Abstract: A detonator assembly is provided. The detonator assembly comprises a deflagration to detonation transition body, a first thermally stable secondary explosive contained by the body, and a bulkhead coupled to the deflagration to detonation transition body. The bulkhead contains pressure within the body associated with firing the detonator assembly at least until a transition from a deflagration operation mode of the detonator assembly to a detonation operation mode of the detonator assembly has occurred. A second thermally stable secondary explosive may alternatively be included in the deflagration to detonation transition body, either separated from the first thermally stable secondary explosive or mixed with the first thermally stable secondary explosive. The detonator assembly comprises effectively no primary explosive.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: April 24, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Thomas J. Wuensche, James Barker, Gayle Moritz
  • Publication number: 20120055366
    Abstract: A high impulse fuze booster includes a booster explosive charge positioned within an explosive charge cavity of a booster housing. A substantially planar flyer plate is coupled with the booster housing, and a detonation waveshaper is positioned within the booster explosive charge. A low-sensitivity explosive charge is opposed to the substantially planar flyer plate. The booster explosive charge is configured to generate a detonation wave and the detonation waveshaper shapes the detonation wave into a planar detonation wave, the planar detonation wave is parallel to the substantially planar flyer plate. The planar detonation wave interacts with the substantially planar flyer plate in two or more stages including a planar striking stage and a planar contact stage where the planar detonation wave carries the substantially planar flyer plate into planar contact with a plurality of surfaces of the low-sensitivity explosive charge to initiate the low-sensitivity explosive charge.
    Type: Application
    Filed: November 11, 2011
    Publication date: March 8, 2012
    Applicant: Raytheon Company
    Inventors: Bryan F. Berlin, Kim L. Christianson
  • Patent number: 8069790
    Abstract: Methods and apparatus for mounting a secondary system on a projectile according to various aspects of the present invention operate in conjunction with a collar. The collar is adapted to at least partially receive a fuze assembly or other projectile structure within the collar. The collar may be adapted to attach to a cover.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: December 6, 2011
    Assignee: Raytheon Company
    Inventor: Edgar R. Melkers
  • Publication number: 20110162548
    Abstract: Methods and apparatus for a weapon according to various aspects of the present invention comprise and/or operate in conjunction with a warhead case and a fuze system. The fuze system may comprise a fuze housing including a flange configured to be secured to the weapon. In one embodiment, the methods and apparatus operate in conjunction with a fuze well rigidly attached to the warhead case. In addition, the methods and apparatus may include a sensor mounted on the flange, and a booster attached to the fuze well adjacent the fuze housing.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 7, 2011
    Inventors: BRYAN BERLIN, Bradley Biggs, Travis Walter
  • Patent number: 7971533
    Abstract: Methods and apparatus for a weapon according to various aspects of the present invention comprise and/or operate in conjunction with a warhead case and a fuze system. The fuze system may comprise a fuze housing including a flange configured to be secured to the weapon. In one embodiment, the methods and apparatus operate in conjunction with a fuze well rigidly attached to the warhead case. In addition, the methods and apparatus may include a sensor mounted on the flange, and a booster attached to the fuze well adjacent the fuze housing.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: July 5, 2011
    Assignee: Raytheon Company
    Inventors: Bryan Berlin, Bradley Biggs, Travis Walter
  • Publication number: 20110094405
    Abstract: A cost-effective solution is proposed to improve explosive transfer between booster and warhead that is compatible with the existing base of general purpose warheads and flexible to work with new warhead configurations. A booster lens is placed in the fuze well that concentrates the pressure wave to penetrate the fuze well with a peak pressure that exceeds the detonation threshold and detonate the warhead explosive. The booster lens can be configured to control the direction of the concentrated lobe to penetrate the fuze well where the barriers are low.
    Type: Application
    Filed: January 6, 2011
    Publication date: April 28, 2011
    Inventors: E. Russ Althof, William R. Hawkins, Henri Y. Kim
  • Patent number: 7930976
    Abstract: A structure includes a substrate of a first material and a second material coating at least a portion of the substrate, where the second material is different from the first material, where the first and second materials, upon being thermally energized, react with each other in an exothermic and self-sustaining alloying reaction that propagates from a first location within the structure along a travel path to a second location within the structure at a rate that depends upon one or more characteristics of the first and second materials.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: April 26, 2011
    Assignee: Ensign-Bickford Aerospace & Defense Company
    Inventors: Richard M. Kellett, Carl F. Mallery, Jr., Robert B. Korcsmaros
  • Publication number: 20110079162
    Abstract: A cost-effective solution is proposed to improve explosive transfer between booster and warhead that is compatible with the existing base of general purpose warheads and flexible to work with new warhead configurations. A booster lens is placed in the fuze well that concentrates the pressure wave to penetrate the fuze well with a peak pressure that exceeds the detonation threshold and detonate the warhead explosive. The booster lens can be configured to control the direction of the concentrated lobe to penetrate the fuze well where the barriers are low.
    Type: Application
    Filed: July 18, 2007
    Publication date: April 7, 2011
    Inventors: E. RUSS ALTHOF, William R. Hawkins, Henri Y. Kim
  • Patent number: 7814834
    Abstract: A fuze mounting assembly for a penetrating weapon configured as a projectable device, the fuze mounting assembly having fasteners, a fuze well and a fuze. The fuze includes an integral bolt flange for securing to the fuze well with the fasteners, wherein an amplification of acceleration of less than 3.0 is satisfied when the penetrating weapon is subjected to impact and penetration shock. Additionally, a projectable device having the fuze is provided. Also, a fuze mounting and a method for mounting a fuze are provided.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: October 19, 2010
    Assignee: Alliant Techsystems Inc.
    Inventors: Stanley N. Schwantes, Bradley M. Biggs, Michael A. Johnson
  • Patent number: 7802518
    Abstract: A fuze mounting assembly for a penetrating, the fuze mounting assembly includes a fuze well and a fuze. The fuze includes an integral flange for securing to the fuze well.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: September 28, 2010
    Assignee: Alliant Techsystems Inc.
    Inventors: Stanley N. Schwantes, Bradley M. Biggs, Michael A. Johnson
  • Patent number: 7698983
    Abstract: A portable, self-contained fire control system includes one or more of: 1) the means to provide geodetic positioning and navigational data for the host weapon platform in relation to established coordinate reference systems; 2) the means to digitally communicate with an off-platform command and control network; 3) the means to compute host platform ballistics data; 4) the means to indicate the current weapon orientation and additionally to indicate the horizontal and vertical weapon movements required to aim the weapon; 5) the means to inductively set fuzes for firing; 6) the means for digitally receiving and processing pre-computed mission data through to the fuze/projectile; 7) the means for locally computing mission data; and 8) the means for manually entering pre-computed data into the system.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: April 20, 2010
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Robert P. Pinto, Gregory Schneck, Patricia M. Alameda, Tom Coradeschi
  • Patent number: 7701694
    Abstract: A highly reliable fuse for explosives and armaments is achieved by employing a micro mechanical device that operates to disrupt a relatively low impedance bypass circuit coupled in parallel with a relatively high impedance trigger mechanism. The removal of the electrical bypassing is performed as a result of the movement of the micro mechanical device to enable detonation under prescribed conditions. The electrical bypassing is removed by having at least one low impedance electrical bridge that is part of the bypass circuit break when the micro mechanical device is subjected to prescribed trigger activation forces, which are typically large forces, such as are generated during launch or impact. The micro mechanical device may be a micro-electrical mechanical system (MEMS) device and the bridge is at least one spring that is part of the MEMS device and also part of the bypass circuit.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: April 20, 2010
    Assignee: Alacatel-Lucent USA Inc.
    Inventor: Cristian A Bolle
  • Publication number: 20090205527
    Abstract: A fuze and a fuzing method comprising initiating detonation of a first booster comprising a circular shaped charge and thereby causing detonation of a second booster.
    Type: Application
    Filed: February 18, 2009
    Publication date: August 20, 2009
    Applicant: Lockheed Martin Corporation
    Inventors: George W. Brooks, Daniel J. Martorana, Jacob A. Diez, David Falabella
  • Patent number: 7552682
    Abstract: A fuze for a weapon configured as a projectable device is provided to reduce the mechanical amplification of impact and penetration shock to a fuze-mounted accelerometer when a projectable device including the fuze encounters a target. The fuze includes a fuze housing having an outer surface, a flange extending radially from the outer surface of the fuze housing, and an acceleration sensor connected to the flange. The flange may include one or more axial holes to enable attachment of the fuze to a projectable device. A penetrating weapon projectable device and a method for installing a fuze for a projectable device are also provided.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: June 30, 2009
    Assignee: Alliant TechSystems Inc.
    Inventors: Stanley N. Schwantes, Bradley M. Biggs, Michael A. Johnson
  • Patent number: 7549374
    Abstract: A fuze mounting assembly for a penetrating weapon configured as a projectable device, the fuze mounting assembly having fasteners, a fuze well and a fuze. The fuze includes an integral bolt flange for securing to the fuze well with the fasteners, wherein an amplification of acceleration of less than 3.0 is satisfied when the penetrating weapon is subjected to impact and penetration shock. Additionally, a projectable device having the fuze is provided. Also, a fuze mounting and a method for mounting a fuze are provided.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: June 23, 2009
    Assignee: Alliant Techsystems Inc.
    Inventors: Stanley N. Schwantes, Bradley M. Biggs, Michael A. Johnson
  • Patent number: 7188566
    Abstract: A detonator (10) has a constant-diameter shell (12) which has a significantly higher shell length-to-diameter (outside diameter) ratio than prior art detonators. The shell (12) is configured to hold an explosive output charge (18) which is cylindrical in configuration and has a charge L:D ratio which is greater than that of prior art constant diameter detonators. As a result, a significant portion of the output signal of the detonator is directed laterally and it is feasible to transfer signals to a plurality of receptor lines disposed along that portion of the length of the detonator which is co-extensive with the length of the explosive output charge (18). A connector block (26) is configured to hold at least one array of receptor lines in side-by-side arrangement along the side of the detonator (10), and transversely to the longitudinal axis of the detonator (10).
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: March 13, 2007
    Assignee: Dyno Nobel Inc.
    Inventor: Ernest L. Gladden
  • Patent number: 6880465
    Abstract: An initiator (14c) for a secondary explosive receptor charge is provided by forming a length of detonating cord (14) into a helical coil containing a plurality of windings with a cut-off barrier provided by, e.g., a separating rib (46) between adjacent windings. The adjacent windings may be not more than about 0.5 inch (12.7 mm) apart. The detonating cord (14) may be wound about a spindle (16) which may optionally provide the separating rib (46). The coil may be a tapered coil which may define a taper angle of e.g., from about 2 to 4 degrees. Alternatively, the coil may be a cylindrical coil, or the cord may be configured in a planar spiral. Optionally, the detonating cord in the helical coil may have a core of explosive material with a loading of less than 15 grains per foot of the cord, e.g., less than 12 grains per foot of the cord, or a loading in the range of from 8 to 12 grains per foot of the cord. The coil may consume about six inches of the cord.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: April 19, 2005
    Assignee: Dyno Nobel Inc.
    Inventors: Farrell G. Badger, Robert A. Lee, Lyman G. Bahr, Daniel P. Sutula, Jr.
  • Patent number: 6834594
    Abstract: A gas generator comprises a tubular housing of a pressure-resistant material and a propellant strand which is incorporated in the housing and provided with an envelope. At least one channel is provided between the envelope and the propellant strand so as to extend in an axial direction. The propellant strand has a substantially circular cross-section and the envelope has a polygonal cross-section.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: December 28, 2004
    Assignee: TRW Airbag Systems GmbH & Co. KG
    Inventors: Günter Herrmann, Rolf Ruckdeschel
  • Patent number: 6601516
    Abstract: Low energy fuse for use in transmitting shock waves. The fuse consists of a hollow plastic tube fabricated of an ethylene-chlorotrifluoroethylene terpolymer, with a coating of reactive powder on an inner wall of the tube. The terpolymer contains a third polymer which enhances adhesion of the powder to the tube, and in the disclosed embodiment, the third polymer is hexafluoroisobutylene.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: August 5, 2003
    Assignee: Goodrich Corporation
    Inventors: David Lee Harrington, Steven William McDonald, Michael Howard Tolson, Leonard Macon Smith
  • Publication number: 20030089263
    Abstract: An explosive delay assembly including a housing, the housing includes a continuous elongated sidewall surrounding a region bounded at one end by a top surface, the top surface including an aperture configured for accepting an end booster where the end booster is attached to a ferrule assembly, the end booster and ferrule assembly connected to form a mild detonating fuze including an explosive charge. The elongated sidewalls include a groove emanating from the aperture and threading around the continuous elongated sidewall to a bottom surface and connected to a channel running from the bottom surface to the top surface. The ferrule assembly is wound around the housing within the groove and inserted into the channel to terminate at a top surface region counterbore. The counterbore is filled with an explosive charge.
    Type: Application
    Filed: March 28, 2001
    Publication date: May 15, 2003
    Inventor: David A. Smith
  • Patent number: 6561101
    Abstract: An explosive delay assembly including a housing, the housing includes a continuous elongated sidewall surrounding a region bounded at one end by a top surface, the top surface including an aperture configured for accepting an end booster where the end booster is attached to a ferrule assembly, the end booster and ferrule assembly connected to form a mild detonating fuze including an explosive charge. The elongated sidewalls include a groove emanating from the aperture and threading around the continuous elongated sidewall to a bottom surface and connected to a channel running from the bottom surface to the top surface. The ferrule assembly is wound around the housing within the groove and inserted into the channel to terminate at a top surface region counterbore. The counterbore is filled with an explosive charge.
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: May 13, 2003
    Assignee: Alliant Techsystems Inc.
    Inventor: David A. Smith
  • Patent number: 6513437
    Abstract: A detonator device and assembly for the initiating a plurality of signal transmission lines with a pressure impulse. The detonator device comprising a detonator casing having a signal receiving end and a firing end. The firing end of the detonator device being substantially shaped to conform with the pressure impulse initiation therein. The firing end having a contact wall of substantially uniform thickness for contacting a plurality of signal transmission lines in a compatible connector element and transmitting a pressure impulse thereto.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: February 4, 2003
    Assignee: Orica Explosives Technology Pty Ltd.
    Inventors: Sek K. Chan, Raymond Carriere, John T. Reid
  • Patent number: 6508176
    Abstract: An initiator (14c) for a secondary explosive receptor charge is provided by forming a length of detonating cord (14) into a helical coil containing a plurality of windings with a cutoff barrier provided by, e.g., a separating rib (46) between adjacent windings. The adjacent windings may be not more than about 0.5 inch (12.7 mm) apart. The detonating cord (14) may be wound about a spindle (16) which may optionally provide the separating rib (46). The coil may be a tapered coil which may define a taper angle of e.g., from about 2 to 4 degrees. Alternatively, the coil may be a cylindrical coil, or the cord may be configured in a planar spiral. Optionally, the detonating cord in the helical coil may have a core of explosive material with a loading of less than 15 grains per foot of the cord, e.g., less than 12 grains per foot of the cord, or a loading in the range of from 8 to 12 grains per foot of the cord. The coil may consume about six inches of the cord.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: January 21, 2003
    Assignee: The Ensign-Bickford Company
    Inventors: Farrell G. Badger, Robert A. Lee, Lyman G. Bahr, Daniel P. Sutula, Jr.
  • Publication number: 20020189481
    Abstract: A linear ignition fuze has a sheath, the inner surface of which has an irregular cross section such that the sheath is capable of forming a gas channel against a single strand core having a substantially circular (e.g. circular or elliptical) cross section. According to one embodiment of the invention, the sheath wall is of a non-uniform thickness having a cylindrical outer surface and a polygonal inner surface. The gap formed between the apexes of the polygonal inner surface and the substantially cylindrical core form the gas channels, while the contact between the side walls of the polygonal inner surface and the cylindrical core confine the core within the sheath.
    Type: Application
    Filed: May 29, 2002
    Publication date: December 19, 2002
    Applicant: GOODRICH COMPANY
    Inventors: Leonard Smith, Gregory B. Dougherty, Michael H. Tolson, David L. Harrington
  • Publication number: 20020170454
    Abstract: Low energy fuse for use in transmitting shock waves. The fuse consists of a hollow plastic tube fabricated of an ethylene-chlorotrifluoroethylene terpolymer, with a coating of reactive powder on an inner wall of the tube. The terpolymer contains a third polymer which enhances adhesion of the powder to the tube, and in the disclosed embodiment, the third polymer is hexafluoroisobutylene.
    Type: Application
    Filed: March 30, 2001
    Publication date: November 21, 2002
    Applicant: The B. F. Goodrich Company
    Inventors: David Lee Harrington, Steven William McDonald, Michael Howard Tolson, Leonard Macon Smith
  • Patent number: 6431074
    Abstract: Supplying a predetermined amount of electric energy to a fine metal wire 4 in a short time causes the fine metal wire 4 to melt and evaporate. Following this phenomenon, a blasting substance 10 expands in volume, so that the evaporative expansion force resulting from the melting evaporation of the fine metal wire 4 is transmitted to and blasts a to-be-blasted object 5.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: August 13, 2002
    Assignee: Hitachi Zosen Corporation
    Inventors: Hiroaki Arai, Hidehiko Maehata, Tetsuya Inoue, Daisuke Tamakoshi, Tsuyoshi Kato
  • Patent number: 6347566
    Abstract: A signal transmission fuse is made of a tube (36) which encases a support tape (14) having a reactive coating (18′) which is adhered to one side of the tape by a binder. A method of making the signal transmission fuse includes depositing on the support tape (14) a reactive paint (18) including a binder, which paint dries to form a reactive coating (18′). The coated support tape (14′) is then folded, i.e., formed into a channel configuration, to provide an inner concave side of the tape on which the reactive coating (18′) has been disposed. The coated support tape is then enclosed, e.g., within an extruded plastic tube (36). One side of the support tape may be made of a first material (14a) to which the reactive coating adheres, and a second side may be made of a second material (14b) which bonds or adheres to the inner surface (36a) of the plastic tube (36) enclosing the coated support tape (14′).
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: February 19, 2002
    Assignee: The Ensign-Bickford Company
    Inventors: Nickolay Iliych Rabotinsky, Vladimir Vasilievitch Furne, Uriy Gennadievitch Pechenev, Igor Vasilievitch Nikitin, Irina Genadievna Beljankina, Ernest L. Gladden
  • Publication number: 20010045883
    Abstract: A wireless digital launch or firing system has a transmitter unit that can transmit separate RF signals representing an “enable” code sequence and an “actuate” code sequence, and a receiver unit which decodes the “enable” code sequence to enable receipt of the “actuate” code sequence, and decodes the “actuate” code sequence to actuate launching or firing. A digital processor receives the code sequences from a receiver circuit and compares them to stored digital code sequences. A memory latch maintains a normally-off primary switch in an “on” condition when the “enable” signal is received. A normally-off secondary switch is set to an “on” condition when the “actuate” signal is received.
    Type: Application
    Filed: April 2, 2001
    Publication date: November 29, 2001
    Inventors: Charles R. Holdaway, Charles J. Tucker
  • Patent number: 6247410
    Abstract: A detonating cord has a core of highly brisant PBXN-8 explosive surrounded by an inner braided layer of polyamide yarn, a flexible sealing sleeve of silicone rubber coated with glue, and an outer braided layer of polyamide yarn adhered to the sealing sleeve. Booster cups may be crimped to opposite ends of detonating cord to place booster charges adjacent the core to assure more reliable detonation of associated ordnance. The method of manufacture of detonating cord calls for providing a core of explosive PBXN-8 slurry, weaving an inner braided layer of polyamide yarn on the core, squeezing moisture out of the core of explosive PBXN-8 slurry during the weaving of the inner braided layer, applying a flexible sleeve of silicone rubber on the inner braided layer, coating glue on the flexible sleeve, and weaving an outer braided layer of polyamide yarn on the glue. Optionally, squeezing the core of explosive PBXN-8 slurry between rollers may be desirable to further remove excess moisture.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: June 19, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Felipe Garcia
  • Patent number: 6170398
    Abstract: A signal transmission fuse is made of a tube (36) which encases a support tape (14) having a reactive coating (18′) which is adhered to one side of the tape by a binder. A method of making the signal transmission fuse includes depositing on the support tape (14) a reactive paint (18) including a binder, which paint dries to form a reactive coating (18′). The coated support tape (14′) is then folded, i.e., formed into a channel configuration, to provide an inner concave side of the tape on which the reactive coating (18′) has been disposed. The coated support tape is then enclosed, e.g., within an extruded plastic tube (36). One side of the support tape may be made of a first material (14a) to which the reactive coating adheres, and a second side may be made of a second material (14b) which bonds or adheres to the inner surface (36a) of the plastic tube (36) enclosing the coated support tape (14′).
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: January 9, 2001
    Assignee: The Ensign-Bickford Company
    Inventors: Nickolay Iliych Rabotinsky, Vladimir Vasilievitch Furne, Uriy Gennadievitch Pechenev, Igor Vasilievitch Nikitin, Irina Genadievna Beljankina, Ernest L. Gladden