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| Number | Title | Issue Date |
| 7350448 | Perforating apparatus, firing assembly, and method A firing assembly for activating a perforating device comprising a module having a first chamber and a second chamber. The firing assembly comprises a firing head for transferring ballistic energy to the perforating device, said firing head having a detonator and a ... | 04/01/2008 |
| 7331290 | Fuze explosive ordnance disposal (EOD) circuit The present invention comprises an electronic Explosive Ordnance Disposal (EOD) circuit which is desirably used with fuzed explosive weapons, such as projectiles having a nominal mission time. After expiration of the mission time, if the explosive has not detonated,... | 02/19/2008 |
| 7284489 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
| 7284601 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
| 7107908 | Firing-readiness diagnostic of a pyrotechnic device such as an electronic detonator Firing-readiness diagnostics in an electronic pyrotechnic device such as an electronic detonator or an electronic blasting system thereof. The diagnostics may include a check for any incompatible attached devices, a resistance or continuity check of an ignition elem... | 09/19/2006 |
| 7021218 | Safety and performance enhancement circuit for primary explosive detonators A safety and performance enhancement arrangement for primary explosive detonators. This arrangement involves a circuit containing an energy storage capacitor and preset self-trigger to protect the primary explosive detonator from electrostatic discharge (ESD). The c... | 04/04/2006 |
| 6966261 | Fuze explosive ordnance disposal circuit The present invention comprises an electronic Explosive Ordnance Disposal (EOD) circuit which is desirably used with fused explosive weapons, such as projectiles having a nominal mission time. After expiration of the mission time, if the explosive has not detonated,... | 11/22/2005 |
| 6962202 | Casing conveyed well perforating apparatus and method Disclosed is a casing conveyed perforating apparatus and method for externally perforating a wellbore casing. The perforating apparatus is attached to the outside of the casing and is conveyed along with the casing when it is inserted into the wellbore. The perforat... | 11/08/2005 |
| 6634298 | Fireset for a low energy exploding foil initiator: SCR driven MOSFET switch A fireset for a low energy exploding foil initiator (LEEFI) comprises a first capacitor for storing a level of electrical energy sufficient to fire the LEEFI, the first capacitor being in electrical communication with the LEEFI, second and third capacitor... | 10/21/2003 |
| 6401621 | Electronic safe and arm apparatus for initiating a pyrotechnic An electronic safe and arm apparatus disposed in a projectile having a spin axis and a spin rate includes a battery; a power supply board connected to the battery, the power supply board including a mechanical G-switch that closes permanently at a predete... | 06/11/2002 |
| 6332399 | Igniting element An igniting element, such as is used in a vehicle air bag igniter reduces the power dissipated by the air bag ignition circuit, as well as its space requirement and its costs, by using the ignition switch/switches as the ignition element (7) itself of the... | 12/25/2001 |
| 6138571 | Fireset for a low energy exploding foil initiator: MOSFET driven MOSFET switch A fireset for a low energy exploding foil initiator (LEEFI) comprises a ft capacitor for storing a level of electrical energy sufficient to fire the LEEFI, the first capacitor being in electrical communication with the LEEFI, second, third, and fourth ca... | 10/31/2000 |
| 6105504 | Contact exploder Actuating circuitry which may be used with a contact exploder, useful on a orpedo, for example, which is sensitive not only to direct hits but also to abrasive damage or sea water exposure caused by grazing contact, but insensitive to changes in its veloci... | 08/22/2000 |
| 5886287 | Guidance information analyzer A gating circuit for a missile guidance system having a capacitor for supplying the output signal together with a plurality of silicon controlled rectifiers for applying or removing a supply voltage to the capacitor.... | 03/23/1999 |
| 5602360 | Electronic delay igniter and electric detonator An electronic delay igniter including a firing capacitor (102) for storing energy required for firing by applying a voltage from an external power supply, an electronic timer unit (206) provided with a solid state oscillator driven by the energy stored in... | 02/11/1997 |
| 5587550 | Internally timed, multi-output impulse cartridge This invention relates to a circuit and method for generating sequential, multiple impulses for use in firing or initiating more than one output device. The invention permits the firing, or actuation, of multiple devices at different times. The disclosed ... | 12/24/1996 |
| 5460093 | Programmable electronic time delay initiator A programmable electronic time delay initiator includes a digital time-delay circuit that counts in response to a dual-resonator clock and, at the end of the programmed time delay, gates the pre-stored charge on a capacitor to a semiconductor bridge initi... | 10/24/1995 |
| 5363765 | Electronic delay circuit for firing ignition element An electronic delay circuit for firing an ignition element. The delay circuit includes a capacitor which stores electric energy supplied from an electric blasting machine, an oscillator generating a clock pulse train, a circuit for over-exciting the oscil... | 11/15/1994 |
| 5291680 | Grenade launching apparatus A grenade launching apparatus launches a number of grenades and has a conller and a launcher. The controller controls the launching and includes a selector which is responsive to operator input for selecting one or more of the grenades to be launched. Th... | 03/08/1994 |
| 5202532 | Autonomous acoustic detonation device An autonomous detonation device comprising an acoustic sensor, a logic circuit, and an output circuit. The invention is capable of discriminating the acoustic signal of an explosion of a primary charge such that it will detonate an explosive shortly there... | 04/13/1993 |
| 5094167 | Shape charge for a perforating gun including an integrated circuit detonator and wire contactor responsive to ordinary current for detonation A new shape charge includes an integrated circuit semiconductor bridge detonating device responsive to ordinary current for triggering a switch in the detonating device and igniting a pyrotechnic composition on a small integrated circuit semiconductor bri... | 03/10/1992 |
| 5094166 | Shape charge for a perforating gun including integrated circuit detonator and wire contactor responsive to ordinary current for detonation A new shape charge includes an integrated circuit semiconductor bridge detonating device responsive to ordinary current for triggering a switch in the detonating device and igniting a pyrotechnic composition on a small integrated circuit semiconductor bri... | 03/10/1992 |
| 5038682 | Electronic device A remote controllable electronic detonator and a method of detonating an explosive charge are disclosed and claimed. The detonator comprises an antenna 16, a RF receiver 15, an energy storage capacitor 17, a switch 18, a delay time circuit 21 and a fuse 1... | 08/13/1991 |
| 5023556 | Sensor circuit response to different fluid conductivities and having time delay feature A circuit for operating a load in response to predetermined external conductivity conditions comprising a pair of sensing electrodes, a source of electrical energy connected to one of the electrodes, a load connected to the other of the electrodes, a cont... | 06/11/1991 |
| 4984519 | Delay circuit for use in electric blasting system A delay circuit for use in an electric blasting system including a capacitor for storing electric energy supplied from an electric blaster, an actuation circuit for detecting the stop of voltage supply from the blaster to generate an actuation signal, a c... | 01/15/1991 |
| 4934268 | Warhead initiation circuit A controlled rectifier firing circuit for the warhead of a missile located n a rocket powered test sled traveling along a track in a target vulnerability test range. The firing circuit includes a silicon controlled rectifier which when rendered conductive ... | 06/19/1990 |
| 4843964 | Smart explosive igniter A non electrically conductive substrate includes both an SCB and a semiconductor switch, the switch being electrically connected to cause the SCB to fire when the switch is triggered.... | 07/04/1989 |
| 4827844 | Electronic firing circuit A circuit for operating a load device comprising an operating circuit including an energy storage device for providing electrical energy for operating the device and a voltage responsive switch having a control terminal and connected between a voltage sou... | 05/09/1989 |
| 4586437 | Electronic delay detonator An electronic delay detonator actuated after the lapse of a predetermined delay time from the application of an input power source, comprises a capacitor for storing the electrical energy supplied from the input power source, a diode bridge for preventing... | 05/06/1986 |
| 4567828 | Bomb safety device A bomb having an electrical fuze is provided. A charging device is located ithin the bomb, and a wind driven energizing means is located within the charging device. Means are also provided for causing the energizing means to pop-up out of the charging devi... | 02/04/1986 |
| 4495848 | Pyro-gun A hand held, shoulder mounted gun with time delay circuitry means to safely ignite a powdered pyrotechnic material.... | 01/29/1985 |
| 4487125 | Timing circuit A timing circuit is described which includes a storage capacitor, a switch, and a load to be energized in a closed loop. A programmable timer, energized by the storage capacitor controls the switch. An external potential is applied to charge the capacitor... | 12/11/1984 |
| 4445435 | Electronic delay blasting circuit An electronic delay blasting circuit (100) receives an input signal through input lines (102, 104). The input signal is passed through a rectifier (106) to produce a DC signal for storing charge on capacitors (140, 152). The capacitor (152) serves as a po... | 05/01/1984 |
| 4434717 | Hybrid fuse triggering device A fuse triggering device for air to air missiles incorporates a readily rvable housing consisting of a threaded member mounted on a standard nut as a base and a hermetically sealed cover. The electronic components are wafered on a silicon substrate disc ... | 03/06/1984 |
| 4374492 | Antipersonnel mine An antipersonnel mine is shown, a plurality of such mines being adapted to be loaded into a round of ammunition for dispersal and subsequent detonation at random instants. The timing for detonation of each mine is determined by the discharge of a capacito... | 02/22/1983 |
| 4328751 | Electronic delay blasting circuit An electronic delay blasting cap (10) receives an input signal over leg wires (12, 14). The input signal is passed through a rectifier (16) to produce a D.C. signal on output lines (26, 28). The D.C. signal charges a storage capacitor (32). When the input... | 05/11/1982 |
| 4311096 | Electronic blasting cap An electronic blasting cap (10) includes a housing (12) which is closed at one end and has adjacent thereto it a base charge (14), a primer charge (16) and an ignition charge (18). The charges (14, 16, 18) are positioned within housing (12) by a metal cap... | 01/19/1982 |
| 4227462 | Lock out proximity fuze amplifier A discriminator circuit having utility in proximity fuze firing circuits is apable of distinguishing between spurious and proper signals on the basis of both amplitude and rate of amplitude rise. A firing switch, operated by a slow-charging trigger circuit... | 10/14/1980 |
| 4141298 | Electronic ignition circuit An electronic ignition circuit for the self-destruction of a projectile fuse, including two condensers chargeable from a single generator, such as a piezoelectric cell. A delay circuit initiates the discharge of the first condenser through an igniter, wit... | 02/27/1979 |
| 4137851 | Electronic ignition circuit An electronic ignition circuit for the self-destruction of a projectile fuse, including a voltage source and a charging condenser determinative of the time interval until self-destruction. A threshold switch is responsive to a predetermined minimum voltag... | 02/06/1979 |
