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| Number | Title | Issue Date |
| 7466532 | Ignition circuit for squib An ignition circuit for squib for igniting a squib which has a heat producing portion that includes an electrically conductive portion and a fuel portion, and transmits a heat produced by supplying electrical current to the electrically conductive portion to the fue... | 12/16/2008 |
| 7327550 | Frequency diversity remote controlled initiation system A blasting system includes a wireless link between a blast controller and a plurality of electronic detonators. Each detonator includes a respective electronic initiator and an explosive charge. Charge storage devices of the initiators are chargeable by a carrier of... | 02/05/2008 |
| 7322293 | Device and system for identifying an unknow or unmarked slave device such as in an electronic blasting system A system such as an electronic blasting system, and a slave device for use in the system, in which a command is issued by a master device to all slave devices connected to the system, causing all slave devices that have not been identified to the master device to re... | 01/29/2008 |
| 7322292 | Squib A squib that is used by being connected to a bus is formed by assembling an explosive unit and a communication/ignition unit that have been constructed as separate components. The communication/ignition unit is provided with an IC substrate for ignition and communic... | 01/29/2008 |
| 7301750 | Electronic switching system for a detonation device, method of operation and explosive device including the same An apparatus for electronically switching a detonation device is configured to arm an energy source upon receiving a first signal and discharge the energy source to the detonation device upon receiving and validating a second signal. An explosive device comprising a... | 11/27/2007 |
| 7242195 | Integral spark detector in fitting which supports igniter in gas turbine engine A system for detecting spark in an igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an inductive pick-up is positioned adjacent the igniter, to detect current pulses in the ign... | 07/10/2007 |
| 7236345 | Compact monolithic capacitive discharge unit A compact monolithic capacitive discharge unit (CDU) is disclosed in which a thyristor switch and a flyback charging circuit are both sandwiched about a ceramic energy storage capacitor. The result is a compact rugged assembly which provides a low-inductance current... | 06/26/2007 |
| 7170198 | Trigger arrangement for a Marx generator In trigger/firing arrangement in a Marx generator comprising n stage capacitors—n being a natural number greater than 1-, the same amount of spark gaps and 2(n−1) charging branches, with the spark gaps operating in a self-breakdown mode, the trigger-/firing arra... | 01/30/2007 |
| 7132757 | Power control system and method A power system includes an energy harvesting device, a battery coupled to the energy harvesting device, and a circuit coupled to the energy harvesting device and the battery. The circuit is adapted to deliver power to a load by providing power generated by the energ... | 11/07/2006 |
| 7116542 | Micro-switches for downhole use A downhole tool includes a device to be activated by electrical energy and a micro-switch that includes conductors and an element between the first and second conductors selected from the group consisting of: a dielectric element capable of being modulated to provid... | 10/03/2006 |
| 7116543 | Apparatus for supplying electric energy to explosion cartridge An electric power supplying apparatus for a rock explosion cartridge is disclosed. The apparatus includes the following elements. A power source generates an electric energy. A plurality of channels consist of capacitors for storing an electric energy from the power... | 10/03/2006 |
| 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 |
| 7017494 | Method of identifying an unknown or unmarked slave device such as in an electronic blasting system A system, for example an electronic blasting system, in which a command is issued by a master device to all slave devices connected to the system, causing all slave devices that have not been identified to the master device to respond with identifying information an... | 03/28/2006 |
| 6789483 | Detonator utilizing selection of logger mode or blaster mode based on sensed voltages An electronic blasting system in which the electronic detonator, when attached to a blasting machine or logger, automatically senses and determines whether it is attached to a blasting machine or a logger, preferably by utilizing a different operating voltage for th... | 09/14/2004 |
| 6268775 | Dual capacitor oscillator circuit An electronic delay circuit (10) useful for the delayed initiation of detonators illustrates several novel features that may be combined, including a novel oscillator (34), a programmable timer circuit (32) and a run control circuit (46). The oscillator (... | 07/31/2001 |
| 5721391 | Electronic firing circuit A firing circuit that is used for a lightweight launcher for propelling rets is disclosed. The firing circuit generates a pulse for firing the rocket launcher and comprises first and second capacitor banks. The first capacitor bank acts as low impedance ... | 02/24/1998 |
| 5571985 | Sequential blasting system A sequential blasting system for use in particular in mining comprises a plurality of detonator stages S1, S2, . . . , each of which contains a series circuit consisting of a thyristor T and a detonator means ZE, said series circuit being interposed betwe... | 11/05/1996 |
| 5510952 | Ignition system using multiple gated switches with variable discharge energy levels and rates An ignition system for a gas turbine engine includes a plurality of igniters, an energy storage capacitance, a charging circuit for charging the capacitance, a plurality of gated switches, with at least one switch connected between each igniter and the ca... | 04/23/1996 |
| 5440991 | Miniature self contained firing system Each of first and second switches, preferably ganged, have first and second operative relationships. In the first operative relationship, the first switch is connected across a firing device to prevent the firing device from being energized. In the first ... | 08/15/1995 |
| 5415100 | Apparatus and method for setting missile fuze delay A digital-to-analog converter provides a dc voltage to a fuze setting circuit which is proportional to the desired delay to be set. A digital controller operates the digital-to-analog converter responsive to the desired firing conditions for the fuze dela... | 05/16/1995 |
| 5367428 | Integrated safety discharge module An integrated safety discharge module for providing a high voltage high current pulse to a load includes a capacitor and a bleed resistor, The capacitor is connected to the bleed resistor by such means as to form a structure which ensures that failure of ... | 11/22/1994 |
| 5335598 | Timing and firing circuitry First and second ganged switches having first and second operative relationships are normally operative in the first relationship and are actuated by an external mechanism to the second relationship. In the first relationship, the first switch shunts and ... | 08/09/1994 |
| 5282421 | Timing apparatus The invention relates to a blasting apparatus for activating a plurality of electrical detonators after predetermined time delays. The blasting apparatus includes a plurality of remote electrical delay devices. Each device is linked to a detonator, and is... | 02/01/1994 |
| 5249095 | Laser initiated dielectric breakdown switch A high voltage, laser light initiated, dielectric breakdown switch for use n safe and arm systems for initiating exploding foil initiators. One electrode has an opening which allows light from a laser source to shine on dielectric material and induce break... | 09/28/1993 |
| 5148346 | EMI protected water-activated pressurized gas release apparatus Water-activated pressurized gas release apparatus which has enhanced protection from the effects of EMI radiation which may inadvertently cause firing thereof. The apparatus is enclosed in a pair of electrically conductive casings to form a Faraday cage. ... | 09/15/1992 |
| 5146104 | Electronic device for triggering a safety device An electronic device for triggering safety devices 10 comprises a firing element ZP which is connected in series to a capacitor ZK. The firing element ZP is acted upon by currents from controllable current sources IQ1, IQ2, which, in accordance with an ou... | 09/08/1992 |
| 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 |
| 4853637 | Fluid conductivity sensor for actuating an electroexploding device Apparatus for sensing the electrical conductivity of fluid wherein when electrodes of the apparatus are exposed to fluid a voltage is developed on a capacitor which voltage has a magnitude determined by the condition of the electrical conductivity of the ... | 08/01/1989 |
| 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 |
| 4768128 | Water activated pressurized gas release device An improved, low cost, water activated pressurized gas release device utilized for inflating flotation equipment, such as life jackets, when dumped into the water. The device includes a one piece die cast housing (12) formed of an electrically conductive ... | 08/30/1988 |
| 4768127 | Ignition system A plurality of electric blasting caps are fired through the ignition system which includes a transformer having a primary winding and a secondary winding. The secondary winding of the transformer is connected to the resistive elements of the blasting caps... | 08/30/1988 |
| 4763077 | Sensor circuit responsive to different fluid conductivities A circuit for operating a load in response to predetermined external conductivity conditions including a pair of sensing electrodes, a source of electrical energy connected to one of the electrodes, a load, an operating circuit connected to the load, to t... | 08/09/1988 |
| 4703280 | Fluid conductivity sensor controlling an electro explosive device A circuit for sensing the electrical conductivity of fluid comprising a pair of electrodes adapted to be exposed to the fluid, a voltage source connected to one of the electrodes, a load connected to the other of the electrodes, a firing circuit branch in... | 10/27/1987 |
| 4700263 | Safe-arm system with electrical charge transfer circuit A safe-arm system for an explosive munition is provided which is in the form of a charge transfer circuit, including a low-voltage capacitor bank which over a relatively long period of time is charged by an associated air turbine. After being charged up, ... | 10/13/1987 |
| 4641580 | Circuit apparatus for operating fireworks ignition A circuit apparatus for operating firewirks ignition is used by connecting with a fireworks ignition circuit with a group of ignition ball terminals lined up as multi-step and multi-file coordinates of which the positive terminals are respectively connect... | 02/10/1987 |
| 4517497 | Capacitor discharge apparatus A capacitor discharge apparatus of the kind having a spark gap device for discharging a capacitor to provide a current impulse for conduction through a load. The capacitor and spark gap device both include flat terminals for connecting them directly to a ... | 05/14/1985 |
| 4513248 | Fluid conductivity sensor Apparatus for sensing the electrical conductivity of fluid which can be used to detonate an electro explosive device for operating a release mechanism for uncoupling a parachute canopy from its load upon landing in water. An operating network connected to... | 04/23/1985 |
| 4482858 | Apparatus for and a method of testing detonating systems An apparatus for and a method of testing AC operable detonating modules (10) whereby an electric charge is discharged through a primary wire (20) threaded through or around a transformer core (14) of a module being tested and the voltage across, or the cu... | 11/13/1984 |
| 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 |
