Laser Or Light Initiated Patents (Class 102/201)
  • Patent number: 9995139
    Abstract: The present invention relates to a surrounding rock pretreatment method for a TBM (tunnel boring machine) passing through a round tunnel section with high rock-burst risk. A technical solution of the present invention is as follows: the surrounding rock pretreatment method includes the following steps: 1. determining a pretreatment area, wherein an area in which a clear spacing between a to-be-constructed tunnel and an adjacent existing tunnel in a TBM tunneling direction is less than 2 times that of a tunnel diameter of the TBM to-be-constructed tunnel is the pretreatment area: 2. performing controlled blasting; 3. injecting high pressure water, and selecting part of blast holes I to perform cyclic water injection pressurizing; and 4, performing normal tunneling by the TBM.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: June 12, 2018
    Inventors: Weijiang Chu, Chunsheng Zhang, Jing Hou, Yong Zhou, Pingzhi Chen
  • Patent number: 9829289
    Abstract: An ammunition cartridge for a gun is optically initiated by a mechanism wholly within the cartridge case itself. The case has as optical primer initiation means producing light fluence to ignite a primer, which ignited primer may in turn ignite into a flashtube, and which ignited flashtube may in turn ignite a bed of propellant in said cartridge. The optical primer initiation means may be an LED, a laser diode, a VCSEL, or some other light emitting device in general. The cartridge optically initiated primer package is so sized and made electrically and mechanically seamlessly physically compatible with current ammunition cartridges such that these new cartridges are completely interchangeable.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: November 28, 2017
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventor: Gregory Burke
  • Patent number: 9724784
    Abstract: In general, the disclosure is directed toward transmitting radiant energy across a boundary of a medical device via an optical feedthrough. A system for transmitting radiant energy across a boundary of a medical device includes a first functional module of a medical device, a second functional module of the medical device, an optical feedthrough assembly coupled to the first functional module, and a radiant energy source that emits a beam through the optical feedthrough assembly to perform a manufacturing process on the first functional module and the second functional module.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: August 8, 2017
    Assignee: Medtronic, Inc.
    Inventors: Reginald D. Robinson, David D. Differding, James A. Johnson, Bernard Q. Li, Gerald G. Lindner, Brad C. Tischendorf, Andrew J. Thom
  • Patent number: 9335493
    Abstract: According to various embodiments, an optical assembly may include a ferrule element having a fiber guiding portion separated from an in-wall locating feature by an access region, and a lens element positioned opposite access region and aligned with the in-wall locating feature. The optical assembly also includes an optical component coupled to and extending through the fiber guiding portion and the access region such that a proximal end of the optical component is positioned within the in-wall locating feature. The optical component includes a coated portion that is coated with an insulator in positions proximate to the fiber guiding portion and an uncoated portion substantially free of the insulator in positions proximal to the in-wall locating feature. The optical assembly also includes a lens cover coupled to the ferrule element and positioned proximate to the lens element.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: May 10, 2016
    Assignee: CORNING CABLE SYSTEMS LLC
    Inventors: Micah Colen Isenhour, Dennis Michael Knecht, James Phillip Luther
  • Patent number: 9275058
    Abstract: A cluster of computer system nodes share direct read/write access to storage devices via a storage area network using a cluster filesystem and operating system implementing DMAPI. Threads executing on a metadata client know when a DMAPI event is required, and generate the DMAPI event on their own initiative when necessary. A metadata server maintains DMAPI queues. If the metadata server relocates to another host, the DMAPI events in the DMAPI queues are moved transparently to users.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: March 1, 2016
    Assignee: Silicon Graphics International Corp.
    Inventors: Geoffrey Wehrman, Dean Roehrich
  • Patent number: 9127918
    Abstract: A distributed ordnance system comprises a plurality of ordnance controllers and a plurality of firing units. Each ordnance controller of the plurality of ordnance controllers may be operably coupled with at least one firing unit of the plurality of firing units. Each ordnance controller may be configured to provide power signals to the at least one firing unit coupled therewith, and communicate with the at least one firing unit for initiation of an ordnance event. A multiple-stage ordnance system may comprise a first stage and a second stage that each include an ordnance controller configured to control operation of an ordnance event, and at least one firing unit to initiate the ordnance event. Related methods for constructing a multiple-stage ordnance control system and controlling initiation of an energetic material are also disclosed.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: September 8, 2015
    Assignee: ALLIANT TECHSYSTEMS INC.
    Inventors: Derek R. DeVries, Brent D. Madsen, Eldon C. Peterson, Donald L. Jackson, William W. Thorup
  • Publication number: 20150144017
    Abstract: Optically sensitised binders which are energetic polyphosphazenes tailored at the molecular level to achieve enhanced absorption of electromagnetic radiation by having attached thereto a chromophore to absorb light and therefore ignite the binder in use.
    Type: Application
    Filed: June 20, 2013
    Publication date: May 28, 2015
    Inventors: Peter Golding, Anthony John Bellamy, Alessandro Enzo Contini
  • Patent number: 8991315
    Abstract: A detonator assembly (10) which includes a housing (16), an explosive (20) in the housing (16), an initiating element (32) exposed to the explosive (20), a circuit for controlling operation of the initiating element (32), and a communication arrangement which can establish communication between the circuit and an external controller (60) at least at one optical frequency.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: March 31, 2015
    Assignee: Detnet South Africa (Pty) Ltd
    Inventors: Andre Koekemoer, Craig Charles Schlenter, Albertus A. Labuschagne, Christopher Malcolm Birkin, Herman Van Der Walt
  • Patent number: 8915188
    Abstract: A detonator includes a flying plate propelled by a squib stage including at least one first pyrotechnic composition and/or one first explosive, the plate being propelled onto a relay stage including at least one secondary explosive, wherein the detonator is provided with thermal insulation surrounding the squib stage for delaying the temperature rise thereof.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: December 23, 2014
    Assignee: Nexter Munitions
    Inventors: Hervé Le Breton, Nathalie Raffin-Barril, Didier Cazajous
  • Publication number: 20140366761
    Abstract: Detonation control modules and detonation control circuits are provided herein. A trigger input signal can cause a detonation control module to trigger a detonator. A detonation control module can include a timing circuit, a light-producing diode such as a laser diode, an optically triggered diode, and a high-voltage capacitor. The trigger input signal can activate the timing circuit. The timing circuit can control activation of the light-producing diode. Activation of the light-producing diode illuminates and activates the optically triggered diode. The optically triggered diode can be coupled between the high-voltage capacitor and the detonator. Activation of the optically triggered diode causes a power pulse to be released from the high-voltage capacitor that triggers the detonator.
    Type: Application
    Filed: January 14, 2013
    Publication date: December 18, 2014
    Inventors: Jonathan L. Mace, Gerald J. Seitz, Lawrence E. Bronisz
  • Patent number: 8857339
    Abstract: An explosives detonator system for detonating an explosive charge with which it is, in use, arranged in a detonating relationship is provided. On acceptance of a detonation initiating signal having a detonation initiating property, the system initiates and thus detonates the explosive charge. The system includes an initiating device which accepts the detonation initiating signal and initiates and thus detonates the explosive charge. The initiating device is initially in a non-detonation initiating condition, in which it is not capable of accepting the detonation initiating signal.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: October 14, 2014
    Assignee: AEL Mining Services Limited
    Inventors: Elmar Muller, Pieter Stephanus Jacobus Halliday, Clifford Gordon Morgan, Paul Dastoor, Warwick Belcher, Xiaojing Zhou, Glenn Bryant
  • Publication number: 20140261039
    Abstract: A detonator assembly (10) which includes a housing (16), an explosive (20) in the housing (16), an initiating element (32) exposed to the explosive (20), a circuit for controlling operation of the initiating element (32), and a communication arrangement which can establish communication between the circuit and an external controller (60) at least at one optical frequency.
    Type: Application
    Filed: July 11, 2012
    Publication date: September 18, 2014
    Applicant: DETNET SOUTH AFRICA (PTY) LTD
    Inventors: Andre Koekemoer, Craig Charles Schlenter, Albertus A. Labuschagne, Christopher Malcolm Birkin, Herman Van Der Walt
  • Publication number: 20140216288
    Abstract: Embodiments of energetic devices are provided herein. In some embodiments, an energetic device may include a substrate having a plurality of pores formed in a portion of the substrate; a plurality of carbon nanotubes disposed proximate the plurality of pores such that a reaction within one of the plurality of pores or the plurality of carbon nanotubes initiates a reaction within the other of the plurality of pores or the plurality of carbon nanotubes; a solid oxidizer disposed in the plurality of pores and the carbon nanotubes; and an initiator to initiate a reaction within one of the plurality of pores or the plurality of carbon nanotubes.
    Type: Application
    Filed: February 6, 2013
    Publication date: August 7, 2014
    Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I
    Inventors: Luke Currano, Madan Dubey, Ronald G. Polcawich
  • Publication number: 20140109787
    Abstract: The subject-matter of the invention is a detonator comprising a flying plate propelled by a squib stage comprising at least one first pyrotechnic composition and/or one first explosive, said plate being propelled onto a relay stage comprising at least one secondary explosive, wherein said detonator is provided with thermal insulation means surrounding the squib stage for delaying the temperature rise thereof.
    Type: Application
    Filed: July 25, 2012
    Publication date: April 24, 2014
    Applicant: NEXTER MUNITIONS
    Inventors: Hervé LE BRETON, Nathalie RAFFIN-BARRIL, Didier CAZAJOUS
  • Patent number: 8695505
    Abstract: A detonator (120) which has a battery (136) which is movable by a pressure wave from a shock tube (158) to a position at which the battery is placed in electrical contact with a circuit (130) which controls firing of an ignition element (128).
    Type: Grant
    Filed: January 10, 2010
    Date of Patent: April 15, 2014
    Assignee: Detnet South Africa (Pty) Ltd.
    Inventors: Andre Louis Koekemoer, Johannes Petrus Kruger, Christopher Malcolm Birkin
  • Publication number: 20130255520
    Abstract: An explosives detonator system for detonating an explosive charge with which it is, in use, arranged in a detonating relationship is provided. On acceptance of a detonation initiating signal having a detonation initiating property, the system initiates and thus detonates the explosive charge. The system includes an initiating device which accepts the detonation initiating signal and initiates and thus detonates the explosive charge. The initiating device is initially in a non-detonation initiating condition, in which it is not capable of accepting the detonation initiating signal. The system also includes a radio frequency identification (RFID) based switching device that detects a switching property of a radio switching signal that is transmitted to the detonator system and switches the initiating device, on detection of the detonation initiating property, to a standby condition in which the initiating device is capable of operatively accepting the detonation initiating signal when it is transmitted thereto.
    Type: Application
    Filed: December 9, 2011
    Publication date: October 3, 2013
    Applicant: AEL Mining Services Limited
    Inventors: Elmar Muller, Pieter Stephanus Jacobus Halliday, Clifford Gordon Morgan, Paul Dastoor, Warwick Belcher, Xiaojing Zhou, Glenn Bryant
  • Publication number: 20130255521
    Abstract: An explosives detonator system for detonating an explosive charge with which it is, in use, arranged in a detonating relationship is provided. On acceptance of a detonation initiating signal having a detonation initiating property, the system initiates and thus detonates the explosive charge. The system includes an initiating device which accepts the detonation initiating signal and initiates and thus detonates the explosive charge. The initiating device is initially in a non-detonation initiating condition, in which it is not capable of accepting the detonation initiating signal.
    Type: Application
    Filed: December 9, 2011
    Publication date: October 3, 2013
    Inventors: Elmar Muller, Pieter Stephanus Jacobus Halliday, Clifford Gordon Morgan, Paul Dastoor, Warwick Belcher, Xiaojing Zhou, Glenn Bryant
  • Publication number: 20130098257
    Abstract: An initiation device for initiation of an explosives charge, which comprises: a transceiver for receipt of wireless command signals; a control circuit for processing of wireless command signals received by the transceiver; and a light source that is suitable for initiation of the explosives charge and that is activated by the control circuit.
    Type: Application
    Filed: May 9, 2011
    Publication date: April 25, 2013
    Applicant: ORICA INTERNATIONAL PTE LTD
    Inventors: Richard John Goodridge, Rodney Wayne Appleby, David Olaf Johnson, Thomas M. Miller
  • Patent number: 8272325
    Abstract: A detonator free blasting system, which comprises: a bulk explosive; a confined explosive; a fiber optic adapted to deliver laser light to the confined explosive, wherein the confined explosive is provided relative to the bulk explosive such that detonation of the confined explosive causes initiation of the bulk explosive.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: September 25, 2012
    Assignee: Orica Explosives Technology Pty., Ltd.
    Inventors: Richard John Goodridge, Rodney Wayne Appleby, David Olaf Johnson, Thomas Miller
  • Patent number: 8192418
    Abstract: In general, the disclosure is directed toward releasing material within a medical device via an optical feedthrough. A system for releasing material with a medical device comprises a cup that holds a material, wherein the cup includes a discharge port, a seal disc that seals the material within the cup, an optical feedthrough assembly coupled to the cup, a shell that defines a chamber within a medical device, wherein the optical feedthrough assembly is coupled to the shell, and a radiant energy source that shines a beam through the optical feedthrough assembly to puncture the seal disc to allow the material to enter the chamber via the discharge port.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: June 5, 2012
    Assignee: Medtronic, Inc.
    Inventors: Reginald D. Robinson, David D. Differding, James A. Johnson, Bernard Q. Li, Gerald G. Lindner, Brad C. Tischendorf, Andrew J. Thom
  • Publication number: 20120111216
    Abstract: A detonator (120) which has a battery (136) which is movable by a pressure wave from a shock tube (158) to a position at which the battery is placed in electrical contact with a circuit (130) which controls firing of an ignition element (128).
    Type: Application
    Filed: October 1, 2010
    Publication date: May 10, 2012
    Applicant: Detnet South Africa (Pty) Ltd.
    Inventors: Andre Louis Koekemoer, Johannes Petrus Kruger, Christopher Malcolm Birkin
  • Publication number: 20110162547
    Abstract: A firing mixture which contains explosives, oxidizing and reducing agents is characterized in that it contains one or several explosives which can be fired by laser light. Also disclosed is a process for producing the same and its use.
    Type: Application
    Filed: December 9, 2010
    Publication date: July 7, 2011
    Inventors: Rainer Hagel, Dieter Hofmann, Bodo Preis, Klaus Redecker, Wolfram Seebeck
  • Patent number: 7942097
    Abstract: A slapper detonator which integrally incorporates an optical wavequide structure for determining whether there has been degradation of the explosive in the explosive device that is to be initiated by the detonator. Embodiments of this invention take advantage of the barrel-like character of a typical slapper detonator design. The barrel assembly, being in direct contact with the energetic material, incorporates an optical diagnostic device into the barrel assembly whereby one can monitor the state of the explosive material. Such monitoring can be beneficial because the chemical degradation of the explosive plays an important in achieving proper functioning of a detonator/initiator device.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: May 17, 2011
    Assignee: Sandia Corporation
    Inventors: M. Kathleen Alam, Randal L. Schmitt, Eric J. Welle, Sean P. Madden
  • Patent number: 7784403
    Abstract: The invention relates to an energetic igniter charge consisting of a mixture of at least one secondary explosive and an optical doping material in powder form. In accordance with the invention, the optical doping material is a metal. The energetic igniter charge can be used in a detonator as well as in an igniter.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: August 31, 2010
    Assignee: Deutsch-Franzosisches Forschungsinstitut
    Inventors: Henry Moulard, Auguste Ritter, Jean-Marie Brodbeck
  • Publication number: 20100180786
    Abstract: A detonator free blasting system, which comprises: a bulk explosive; a confined explosive; a fiber optic adapted to deliver laser light to the confined explosive, wherein the confined explosive is provided relative to the bulk explosive such that detonation of the confined explosive causes initiation of the bulk explosive.
    Type: Application
    Filed: March 14, 2008
    Publication date: July 22, 2010
    Applicant: ORICA EXPLOSIVES TECHNOLOGY PTY LTD
    Inventors: Richard John Goodridge, Rodney Wayne Appleby, David Olaf Johnson, Thomas Miller
  • Publication number: 20100180787
    Abstract: A firing mixture which contains explosives, oxidizing and reducing agents is characterized in that it contains one or several explosives which can be fired by laser light. Also disclosed is a process for producing the same and its use.
    Type: Application
    Filed: March 30, 2010
    Publication date: July 22, 2010
    Inventors: Rainer HAGEL, Dieter Hofmann, Bodo Preis, Klaus Redecker, Wolfram Seebeck
  • Publication number: 20100175573
    Abstract: An apparatus for remote detection or neutralization of an explosively formed penetrator device. A LIDAR or LADAR unit may be used in conjunction with a RADAR unit to both detect the presence of an EFP and neutralize the EFP having an associated passive infrared sensor. The LIDAR unit's wavelength is selected to approximate the signature from the intended EFP target which then causes the safe remote detonation of the EFP. The detected EFP signature may be compared with known signatures and presented to a user via a display terminal. The display terminal may also present associated terrain or GPS data.
    Type: Application
    Filed: June 17, 2008
    Publication date: July 15, 2010
    Inventors: Alan Cornett, Robert C. Becker, Doug Carlson, David W. Meyers
  • Publication number: 20090158952
    Abstract: A laser ignition apparatus including at least two laser light generating devices and a common optical coupling-in means for coupling laser light from the at least two laser light generating devices into a combustion chamber of a combustion machine, wherein the at least two laser light generating devices are so arranged that laser light given off by the laser light generating devices in the operating condition impinges on the optical coupling-in means and/or issues from the optical coupling-in means in parallel displaced relationship or at an angle to each other. A method of igniting a fuel/air mixture in a combustion chamber of a combustion machine.
    Type: Application
    Filed: December 16, 2008
    Publication date: June 25, 2009
    Inventor: Friedrich Gruber
  • Patent number: 7546804
    Abstract: An artillery charge includes a generally cylindrical body with a hollow core; propellant disposed in the body and first energetic material disposed in the hollow core; and a seal disposed over one end of the hollow core, the seal including second energetic material disposed therein. A laser igniter ignites the second energetic material in the seal, thereby providing more reliable ignition of the first energetic material and the propellant. The artillery charge reliably ignites using a lower powered laser than known charges.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: June 16, 2009
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Anthony E. Tartarilla, III, Henry Kerwien, Thomas DeVoe, Joseph Leone, Luke Helsel, Nicholas Turner
  • Patent number: 7531108
    Abstract: Photoluminescent phosphor powders and a method for making phosphor powders. The phosphor powders have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention advantageously permits the economic production of such powders. The invention also relates to improved devices, such as display devices and lighting elements, incorporating the phosphor powders.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: May 12, 2009
    Assignee: Cabot Corporation
    Inventors: Mark J. Hampden-Smith, Toivo T. Kodas, James Caruso, Daniel J. Skamser, Quint H. Powell, Klaus Kunze
  • Patent number: 7478594
    Abstract: An explosive primer responsive to optical energy is constructed from an energetic composition optically coupled to an optical power source by a pigtailed optical fiber. The pigtailed portion of the optical fiber is positioned proximate to the energetic composition such that optical power emitted preferably by a laser diode initiates the detonation of the energetic composition thereby further initiating an additional, sympathetic detonation.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: January 20, 2009
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Gary Chen, Daniel O. Gutierrez
  • Patent number: 7479624
    Abstract: A laser light actuation system for remotely and selectively actuating a function of a known apparatus. The system includes a laser module adapted to produce a known laser light signal, which is preferably sparsely modulated, the signal being suitable for transmission over a long distance. The system also includes a receiver module adapted to receive and detect the known laser light signal. The receiver module is also adapted to selectively produce an actuation signal in response to the known laser light signal to selectively actuate such an apparatus. The receiver module includes a timer operatively associated with the receiver module to selectively limit the time of actuation of such an apparatus in response to the laser light signal. A laser light actuation method for remotely and selectively actuating a function of a known apparatus.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: January 20, 2009
    Inventor: Glenn Morris
  • Patent number: 7474842
    Abstract: An air heater is provided for use in buildings or other structures. The air heater uses infrared lamps to generate a temperature rise in a forced air chamber that contains several infrared lamps, in which two ends of the chamber act as an inlet and an outlet, and in which the chamber has a highly reflective interior surface that reflects the light being emitted by the lamps to multiply the thermal effect of the infrared light sources. An alternative embodiment uses a closed chamber, in which the temperature rise causes the unit to act as a detonator.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: January 6, 2009
    Inventor: David M. Bergstein
  • Publication number: 20080264371
    Abstract: A laser ignition device for irradiating and condensing laser beams in a combustion chamber of an internal combustion engine so as to ignite fuel particles within the combustion chamber, includes: a laser beam generating unit for emitting the laser beams; and a condensing optical member for guiding the laser beams into the combustion chamber such that the laser beams are condensed in the combustion chamber, wherein the laser beam generating unit comprises a Beam Parameter Product (BPP) laser beam generating unit which emits the laser beams with a BPP value of no more than 20 mm·mrad (radius·half angle).
    Type: Application
    Filed: April 25, 2008
    Publication date: October 30, 2008
    Inventors: Akikazu Taido, Tomoaki Kato
  • Patent number: 7216589
    Abstract: An ordnance fuse apparatus is described that uses electrical and mechanical, and optical devices. The ordnance fuse apparatus includes a controller to control an optical switch and a laser to detonate an explosive charge of the ordnance. Other embodiments include an accelerometer and/or spin detector for detecting that the ordnance has been fired and an optical detector for detecting the proper operation of the laser and a position sensor for detecting correct positioning of the optical switch. Another embodiment includes a microlens to focus the laser optical signal onto the ignitor. In yet other embodiments, the explosive charge is detonated either by ignition of an ignitor or by a shock wave from the ignitor. The resulting ordnance fuse apparatus has significantly reduced size and improved performance and safety.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: May 15, 2007
    Assignee: Lucent Technologies Inc.
    Inventors: David John Bishop, Herbert R. Shea, Donald P. Weiss
  • Patent number: 7204190
    Abstract: The present invention relates to a new method, based on laser technology, of initiating explosive charges (6, 10, 17, 30), and a device which is intended for initiating explosives and in accordance with said method functions according to entirely new principles. The basic idea underlying the invention is to ignite the explosive charge concerned not as previously proposed by means of the radiation emitted from a laser but by way of self-destruction or overheating of a laser source (2, 11, 18, 25, 33) assembled together with the explosive charge (6, 10, 17, 30). In this regard, the aim is to cause the laser source to melt down or explode and, in connection with this, to initiate the explosive. With the present invention, it has suddenly become possible to use even very small laser sources of the mini or micro type for triggering explosive charges where it was previously necessary to use very powerful laser sources for the same purpose.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: April 17, 2007
    Assignee: Bofors Bepad AB
    Inventor: Owe Englund
  • Patent number: 7201103
    Abstract: A method of initiating explosive charges ignites an explosive charge by the heat and/or explosion of a laser due to self-destruction or overheating of the laser source, and not by the radiation emitted from the laser. The laser source is assembled and/or embedded within the explosive charge. The laser source melts down or explodes and thereby initiates the explosive. With the disclosed method, it is possible to use even very small laser sources of the mini or micro type for triggering explosive charges rather than conventional approaches using powerful laser sources for the same purpose.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: April 10, 2007
    Assignee: Bofors Bepab AB
    Inventor: Owe Englund
  • Patent number: 7093541
    Abstract: A solid explosive munition casing for an explosive charge, the inner surface of the casing including a material that is highly reflective in the optical and infrared spectrum. Through this reflectivity, electromagnetic radiation generated by the detonation process is redirected back into the interior of the munition to increase its explosive output.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: August 22, 2006
    Assignee: Applied Research Associates, Inc.
    Inventor: John M. Herbelin
  • Patent number: 7051655
    Abstract: The invention relates to an optical detonator comprising a secondary explosive disposed in a cavity, an optical fiber having one end connected to a source of laser radiation, and a focusing optical interface situated between the other end of the optical fiber and the secondary explosive and adapted to transmit the laser radiation to the secondary explosive. According to the invention, a layer of an ignition powder is disposed in the cavity between the secondary explosive and the focusing optical interface.
    Type: Grant
    Filed: October 21, 2002
    Date of Patent: May 30, 2006
    Assignee: Institut Franco-Allemand de Recherches de Saint-Louis
    Inventors: Henry Moulard, Augustre Ritter, Jean-Marie Brodbeck
  • Patent number: 6802259
    Abstract: A device for firing energetic materials (14) such as pyrotechnics or explosives, including a firing composition (12) for the energetic materials (14) and an UV-radiation source (16) for irradiating the firing composition (12), wherein the UV-radiation source (6) possesses a piezo-luminescence element (18) in order to provide a current-less and electromagnetically interference-secure firing device.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: October 12, 2004
    Assignee: Diehl Munitionssysteme GmbH & Co. KG
    Inventor: Ernst-Christian Koch
  • Patent number: 6758922
    Abstract: Pyrotechnic compositions such as used in initiator devices and corresponding initiator devices having a low firing energy are provided. The pyrotechnic composition includes a mixture containing a fuel component which includes a quantity of at least one Iron Blue Pigment and an oxidizer component which includes at least one oxidizer effective, upon reaction initiation with at least a portion of the quantity of the at least one Iron Blue Pigment, to produce gaseous reaction products.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: July 6, 2004
    Assignee: Autoliv ASP, Inc.
    Inventor: Brian K. Hamilton
  • Publication number: 20040123763
    Abstract: The present invention relates to a new method, based on laser technology, of initiating explosive charges (6, 10, 17, 30), and a device which is intended for initiating explosives and in accordance with said method functions according to entirely new principles. The basic idea underlying the invention is to ignite the explosive charge concerned not as previously proposed by means of the radiation emitted from a laser but by way of self-destruction or overheating of a laser source (2, 11, 18, 25, 33) assembled together with the explosive charge (6, 10, 17, 30). In this regard, the aim is to cause the laser source to melt down or explode and, in connection with this, to initiate the explosive. With the present invention, it has suddenly become possible to use even very small laser sources of the mini or micro type for triggering explosive charges where it was previously necessary to use very powerful laser sources for the same purpose.
    Type: Application
    Filed: February 4, 2004
    Publication date: July 1, 2004
    Inventor: Owe Englund
  • Patent number: 6744965
    Abstract: An improved pressure vessel comprises a tubular casing having an internal cavity and a first and second opening at each end. The internal cavity is divided into a first and second cylindrical plug region extending inward from the first and second opening and a hollow interior region. An optical component in the hollow interior has at least a plurality of optical fiber pigtails extending therefrom. A first and second cylindrical plug is force fit into the plug regions. At least one plug has a through-hole for receiving optical fiber pigtails. At least one plug has a ceramic adhesive plug formed by inserting adhesive into the through-hole and preferably filing the void space therein. The adhesive encapsulates the optical fibers passing through the through-hole. The plug has a channel machined into its outer circumference to receive an O-ring. A cap covers over and beyond the outer surface of the plug.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: June 1, 2004
    Assignee: Litton Systems, Inc.
    Inventors: Akbar Arab-Sadeghabadi, Agop H. Cherbettchian, Donald A. Frederick, Kurt R. Carlson
  • 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: 6718881
    Abstract: An ordnance control and initiation system is provided. The system includes a plurality of ordnance devices which may be segregated into a plurality of sets. Each set of the ordnance devices has at least one ordnance device and further includes an ordnance device interface, which preferably includes an optical-to-electrical converter. A controller issues state commands to a master ignition control module operatively coupled to the controller, which retransmits the state commands to a plurality of slave ignition control modules. Each of the slave ignition control modules associated with one of the sets of the ordnance devices and preferably is optically coupled to each of the ordnance devices within that set. The slave ignition control modules re-transmit the state commands optically to the ordnance devices of the associated the ordnance device set of that slave ignition control module.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: April 13, 2004
    Assignee: Alliant Techsystems Inc.
    Inventor: Robert A. Rauscher, Jr.
  • Publication number: 20030226465
    Abstract: A device for firing energetic materials (14) such as pyrotechnics or explosives, including a firing composition (12) for the energetic materials (14) and an UV-radiation source (16) for irradiating the firing composition (12), wherein the UV-radiation source (16) possesses a piezo-luminescence element (18) in order to provide a current-less and electromagnetically interference-secure firing device.
    Type: Application
    Filed: May 21, 2003
    Publication date: December 11, 2003
    Applicant: Diehl Munitionssysteme GmbH & Co.KG
    Inventor: Ernst-Christian Koch
  • Patent number: 6539868
    Abstract: An optical igniter includes a pyrotechnic substance and an optical fiber, one end of which is connected to a source of laser radiation and the other end of which is inserted in a connector. A removable mechanical connection is provided between the optical fiber connector and the pyrotechnic substance. A glass rod between the optical fiber connector and the pyrotechnic substance has its axis aligned with the axis of the optical fiber and is made of graded index glass in one part or two coaxial parts. It is in contact with the pyrotechnic substance and with the end of the optical fiber. Laser radiation from the end of the optical fiber passes through the glass rod and is focused onto the face of the glass rod in contact with the pyrotechnic substance.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: April 1, 2003
    Assignee: Institut Franco-Allemand de Recherches de Saint-Louis
    Inventor: Henry Moulard
  • Publication number: 20030047101
    Abstract: Methods and systems for laser diode ignition of field cannons and weaponry. A series of one or more laser diodes or laser diode array, bars or stripes that are configured to optically pump a collimator which may be formed of materials to provide a lasing medium. The energy output of these devices can be combined when configured as an array or a series of redundant laser diodes assemblies to provide safe and reliable ignition systems. The collimator may direct the output from these laser diode assemblies as multiple collimated ignition beams. The laser diode assemblies may optically end pump and/or side pump the collimator or collimating rod to deliver a more directed energy output to artillery propellant. Additionally, the duration of the pulses may be controlled and extended as necessary to help ensure proper ignition of the propellant.
    Type: Application
    Filed: June 6, 2002
    Publication date: March 13, 2003
    Inventors: Mark Folsom, Wm. David Fahey, Joseph E. Carvalho, Tom Butterfield, Robert M. Valenti
  • Patent number: 6499404
    Abstract: In ignition elements where the energy required to ignite the charge is produced using a laser source, the laser light is injected by means of an optical fiber or a laser optics system enabling the laser light to be focused onto the charge at the required intensity for ignition. Transmission losses and injection losses occur while the laser light is transmitted by means of optical devices or optical fibers. Known ignition devices are also complicated in terms of construction. According to the invention, the laser light source is a laser diode (3) and the explosive (4) that is to be ignited is arranged directly on the part (12) of the housing (8) of the laser diode (3) that allows the laser light (13) to pass through it.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: December 31, 2002
    Assignee: Dynamit Nobel GmbH Explosivstoff-und Systemtechnik
    Inventors: Heinz Kern, Gerhard Kordel
  • Publication number: 20020195016
    Abstract: A safety system for a motor vehicle includes a plurality of safety devices each adapted to be activated in the event that an accident should occur. Each safety device includes at least one element selected from the group comprising an electric activator for activating the safety device and a sensor to sense a parameter related to the safety device. The system includes a first conductive arrangement comprising at least one first conductor and a first group of a plurality of switches, with each switch of the first group being connected to one of the first conductors. The system includes a second conductive arrangement comprising at least one second conductor, and a second group of a plurality of switches, with each switch of the second group being connected to one of the second conductors. The elements are connected in a circuit so that each element is connected between one switch of the first group of switches and one switch of the second group of switches.
    Type: Application
    Filed: May 30, 2002
    Publication date: December 26, 2002
    Inventors: Roger Darraba, Denis Bourcart, Bernard Demersseman