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7336474 |
Microelectromechanical devices
An apparatus includes a switch comprising microelectromechanical elements, the microelectromechanical elements including a sealed chamber containing a dielectric element, and conductors in the...
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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....
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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...
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7230814 |
Digital squib
An intelligent switch system, a so-called squib, for providing power to sensitive equipment, such as missiles, rockets and the like, comprises a pair of serially connected power switches which are...
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7191706 |
Optically triggered fire set/detonator system
The present invention is directed to a system having a plurality of capacitor discharge units (CDUs) that includes electrical bridge type detonators operatively coupled to respective explosives. A...
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7161790 |
Ignition device for bus connection
A plurality of the ignition devices are connected to an ignition control system via a common bus. The ignition devices are selectively operable for actuating a plurality of airbag devices by means...
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7154733 |
Low cost squib driver for airbag application
A circuit and a method are given, to realize a very efficient driver device for igniters or squibs as used e.g. in airbag applications. Special attention has been turned to include secure and...
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7154732 |
Apparatus and system for controlling a squib firing device
A squib firing device is constructed to test and fire a squib load being applied to the squib firing device. A power supply of the squib firing device conditionally stores and discharges a squib...
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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...
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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...
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7100511 |
Dual redundancy system for electronic detonators
A detonator assembly ( 10 ) comprising a housing ( 12 ) disclosed and claimed. The assembly comprises an main circuit ( 11 ) comprising an electrically operable fuse ( 16 ) located in the housing....
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6992877 |
Electronic switching system for a detonation device
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...
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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...
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6781813 |
Release element for initiating pyrotechnics
An electronic releasing device for pyrotechnic igniters has a primary and a secondary charge. The primary charge is ignited by means of a circuit that comprises electronic components and whose...
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6650528 |
Ignition device for a safety system
A safety system ignition device ( 1 ) having an igniter housing ( 3 ), an open housing ( 9 ), and an ignition element ( 2 ) with a; least two contact lugs ( 7 and 9 ) that are positioned in the...
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6611424 |
Housing of data processing system with mechanism for easy removal and insertion of disk drive
A housing of a data processing system with a mechanism for easy removal and insertion of a disk drive, comprises a shell, two opposite guiding plates, a rear plate, and a front plate. A front...
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6476464 |
Low resistance hermetic lead structure
The invention provides a lead structure having a lead of low resistance material disposed within a surrounding sleeve or collar of low expansion material which is bonded at one end to the lead. The...
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6385031 |
Switches for use in tools
A switch for use in various applications, including downhole applications, includes a first conductor and a second conductor and an insulator electrically isolating the first and second conductors....
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6351376 |
Computer data storage device mounting apparatus
A mounting apparatus for mounting a data storage device in a computer housing includes a bracket, a securing means and a flexible plate. The bracket has a first face for supporting a data storage...
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6166452 |
Igniter
An igniter for igniting a reactive material has a conductor for conducting power and communication signals to and from the igniter. A controller is located within the igniter. The controller is...
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6146598 |
Initiator unit having a self locking two wire connector for pyrotecnic generators
The present invention relates to a two-wire pyrotechnic initiator unit intended for motor-vehicle safety. The initiator unit comprises a socket molded over electrodes which are connected, on the...
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5920029 |
Igniter assembly and method
An electrically conductive system including an apparatus and method wherein an electric current is sealingly passed through at least two spaced insulatively sealed zones with an insulatively sealed...
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5912427 |
Semiconductor bridge explosive device
This invention discloses a method of fabricating an electroexplosive device which utilizes a semiconductor bridge as an ignition element. The semiconductor bridge is electrically connected to a...
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5672841 |
Inflator initiator with zener diode electrostatic discharge protection
An initiator with electrostatic discharge protection includes a generally cup-shaped housing having an open end, a quantity of pyrotechnic material in the housing, and a seal for closing the...
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5517920 |
Device for sequentially firing electrical detonators
The invention concerns a device for the sequential firing of electrical detonators in several firing circuits, the device consisting of a detonating machine, electric leads and switches for...
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5367956 |
Hermetically-sealed electrically-absorptive low-pass radio frequency filters and electro-magnetically lossy ceramic materials for said filters
An electromagnetically lossy liquid- or gas-tight fusion seal for use as a low pass radio frequency signal filter constructed as a matrix of glass binder and ferromagnetic and/or ferroelectric...
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5311394 |
Water-actuated pressurized gas release device
A water-actuated, pressurized gas release device (10) that automatically actuates to inflate an associated personal flotation device when immersed in an electrically conductive fluid, such as salt...
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5291829 |
Radio frequency attenuating connector
A radio frequency attenuating connector includes a secondary coil connected to a load, an electromagnetic shield enclosing the secondary coil and the load, a primary coil, a coupler for detachably...
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5243492 |
Process for fabricating a hermetic coaxial feedthrough
The present invention relates to a process for fabricating a hermetic coaxial feedthrough device wherein a pin is substantially centered within the device. The pin can be electrically connected to...
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4651254 |
Inductive igniters with secondary coil
A secondary coil is provided for use in inductive igniters for the igniting of propellant charge powder. In these igniters, two coil systems cooperate with each other in accordance with the...
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4646640 |
Process and apparatus for chronologically staggered initiation of electronic explosive detonating devices
For the chronologically staggered initiation of a plurality of electronic explosive delay detonators connected together with a blasting detonating machine, a signal current produced in each...
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4451867 |
Electrically actuable ignition assembly
An electrically actuable ignition assembly comprising an electric ignition element having insulated electrical leading wires connected by means of conducting metal contact elements to the ends of a...
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4304184 |
Selectively actuable electrical circuit
A control circuit for firing an electrically actuable igniter in response to a firing signal having predetermined characteristics. For protection from inadvertent or accidental actuation, the...
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4297947 |
Electric igniter
An ignition system for the firing of a plurality of electrically actuable igniters (16) and methods for construction and use of the assembly. The ignition leading wire (17) of each electrically...
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4273051 |
Electric device
An electrically ignited load such as a fusehead is connected to the secondary winding of a transformer. The secondary winding is magnetically linked to a primary winding through a magnetic circuit...
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4271453 |
Igniter with coupling structure
An igniter is disclosed having a heat generator responsive to an ignition signal for igniting powder. comprises a first connector insulatingly supporting a first pair of electrical conductions...
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4185556 |
Mine firing system
1. In a submarine mine, a normally open mine firing circuit, a timing dev operable in unit cycles and having means for closing said firing circuit partially during a cycle of operations thereof,...
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4141297 |
Ignition circuits
This invention relates to an ignition circuit assembly for an explosive device of the kind in which an electric heating element is energizable from a transformer secondary winding to ignite the...
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4110813 |
Ignition device for passive retention system
An ignition device for a passive retention system, especially in motor vehicles, in which an ignition unit fitted into a housing includes two plug pins which protrude on one side with their free...
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4110812 |
Non-recurrent pulse generator
A load power supply is connected to the load device through a gated switch nd time-delay fuse. The maximum current pulse delivered by the power supply is limited by the "delayed blow"...
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4106074 |
Triggering head for devices controlled by an electric power input
The triggering head comprises a case containing a battery connected by means of an electronic switching device to the terminals of an output intended for connection of the device to be triggered...
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4106073 |
Apparatus for igniting the match heads of electric detonators
An apparatus for obtaining reliable ignition of the match heads of series-connected electric detonators, the apparatus including a dischargeable source of energy capable of supplying to the match...
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4103619 |
Electroexplosive device
An improved electroexplosive device employs a header having contact pins hermetically sealed with glass passing through from a connector end of the header to a cavity filled with a shunt layer of a...
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4051907 |
Selective firing system
Selective firing system for gun perforating comprising in combination a surface control, and a subsurface master sub together with a multiplicity of identical slave subs each operatively connected...
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4033610 |
Electrical ignition circuit for gas generator
An electrically activated ignition circuit system for a gas generator to be used to inflate a gas bag in a motor vehicle.The system includes a bridge circuit including a first ignition filament for...
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4019439 |
Electric firing device for a pyrotechnic charge
An electric firing device for a pyrotechnic charge in a projectile comprises a pulse generator, a pulse-activable firing control element, and means controlling the application of pulses to this...
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3974424 |
Variable resistance bridge element
Resistance element, such as a bridge element for electro-explosive devices. The resistance element of this invention is of generally S-shaped configuration having two arcuate resistor portions...
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3809964 |
ELECTRICALLY ACTUATED PRIMING DEVICE
A priming device actuated by electrical induction and comprising a primer containing a pyrotechnical substance, an armature placed in contact with or proximate to the pyrotechnical substance and an...
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3791302 |
METHOD AND APPARATUS FOR INDIRECT ELECTRICAL IGNITION OF COMBUSTIBLE POWDERS
A method and apparatus for the ignition of combustible powders using transparently shielded sources of high intensity light pulses is described. Preferably, low actuating voltage, one shot or...
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3762331 |
FIRING CIRCUIT FOR BLASTING CAPS
The present system for selectively firing explosive charges utilizes as firing a signal an alternating current having a frequency of the order of 10 kHz and a voltage of at least 60 volts, which is...
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