Abstract: A self-contained tool incorporates an electronic system for significantly reducing the number of batteries required to detonate an explosive downhole, making the tool short enough for transport by helicopter, rather than by boat, to an offshore well. This shortness is further beneficial for negotiating tight-radius bends in deviated wells. Safety is improved by a shear pin holding a pressure-activated switch in an open position until sufficient pressure shears the shear pin. Control from the surface is provided in applications where fluid pressure is controlled at the surface and raised to shear the shear pin. Longer run-in time is better accommodated by the combination of the electronic system and the shear pin.

Abstract: A squib ignitor circuit (20,40) reduces the probability of an accidental airbag deployment to greatly increase the safety of an automobile. A squib (24,28,44) operates at a voltage significantly higher than the squib ignitor circuit (20,40) to produce heat sufficient to ignite pyrotechnic material. Thus, a short condition to the squib (24,28,44) does not produce an inadvertent airbag deployment. The squib ignitor circuit (20,40) forms a conductive path through an inductor (23,43) via a first transistor (21,41) and a second transistor (22,42). The inductor (23,43) stores energy. The inductor (23,43) produces a voltage substantially greater than the voltage powering the squib ignitor circuit (20,40) when the conductive path is broken. The inductor (23,43) releases the stored energy to the squib (24,28,44) generating heat. A sequence (more than one time) of storing energy and releasing energy by the inductor (23,43) is required to generate heat sufficient to ignite pyrotechnic material by the squib (24,28,44).

Abstract: A self-correcting inductive fuze setter is used to detect and correct any errors that might occur during transmission and reception of a velocity corrected time data word so that a projectile will be detonated at the proper time. The self-correcting inductive fuze setter uses an error detection/correction algorithm to create an encoded data word from the velocity corrected time data word. Next, the encoded data word is used to digitally modulate a carrier signal, which is then transmitted from the muzzle of the weapon to the projectile. The received carrier signal is then demodulated by a demodulator/filter and decoded by a decoder located on the projectile producing the original velocity corrected time data word. In addition, the self-correcting inductive fuze setter will measure the error in both the high-speed fuze oscillator and the low-speed fuze oscillator located on the projectile and adjust the transmitted data word to account for these errors.

Abstract: An arming system for a missile which prevents destruction of the missile side of a specified area. The missile may be launched from a submarine, and follow a water-air-trajectory, and includes a variable-range timer acting in conjunction with an impact detection system. The timer drives arming switches to the armed condition after a predetermined time, and then opens the switches after a second predetermined time, which establishes a maximum range for detonation of the missile warhead.

Abstract: An attitude sensing safing system for a missile, which senses an attitude ror of the missile, and activates a dudding signal when the error exceeds a certain value for a predetermined time. The missile includes a delay arming timer, which is deactivated when by the dudding signal. The system allows the missile to correct itself, by requiring that the error signals persist for a set time.

Abstract: A desensitized firing circuit has a pair of diodes, a resistor, and a sevble wire loop used in combination with an existing firing circuit. With the severable wire loop intact, current flow through the resistor is shunted to ground, and the circuit operates in a sensitive mode. With the loop severed, current flows through the resistor and one of the diodes to the base of an input switching transistor, thereby maintaining this transistor in a conductive state until a sufficiently large and properly shaped negative input signal is received.

Abstract: An arming and safing system for a missile having an acceleration responsive mechanism for actuating a timing device upon launching to insure arming only after the passage of a predetermined period of time, and an omnidirectional impact switch for activating a dudding switch in case of missile impact at a distance less than a minimum safe distance from the launching vehicle.

Abstract: As voltage and frequency dependent multiple payload dispenser system in which a variable voltage or frequency signal source is used to selectively fire squibs based on the pass voltages and pass frequencies of a filter network. The filter network is placed near, or incorporated into, the payload dispenser itself or attached to the magazine, reducing system wiring.

Abstract: In one aspect of the invention, an environmentally insensitive initiator, including: an electro-explosive device responsive to an electrical signal of unique voltage and frequency applied to the electro-explosive device, the unique voltage and frequency being such that are not otherwise present in a well completion operation. An example of voltage and frequency is 350V at 900 Hz. In another aspect, an initiator insertable in a housing insertable in a well casing, the initiator having a contact which is grounded when the initiator is uninstalled, to protect against unintended currents, but which becomes ungrounded by the act of inserting the initiator in the housing. In a further aspect, an initiator including a dual-function fuse.

Abstract: A slapper detonator comprises a solid-state high-voltage capacitor, a low-jitter dielectric breakdown switch and trigger circuitry, a detonator transmission line, an exploding foil bridge, and a flier material. All these components are fabricated in a single solid-state device using thin film deposition techniques.

Abstract: An electronic switch for triggering firing of munitions, the switch inclug an electrical circuit having a high voltage source, a sealed two electrode gap in communication with the high voltage source, a microgap in series with the sealed gap, an exploding foil initiator in communication with the microgap, and an energy storage capacitor bridging legs of the circuit between the high voltage source and the sealed gap. A trigger circuit is in communication with the high voltage source and a fire pulse generator, and is provided with a lead extending from the trigger circuit to one of said legs of said circuit between said sealed gap and said microgap. The energy storage capacitor is charged by the high voltage source to a voltage V which is substantially across the sealed gap. A pulse from the fire pulse generator activates the trigger circuit to provide a high voltage potential V.sub.t across the sealed gap, such that voltage V+V.sub.t breaks down the sealed gap to permit conduction therethrough.

Abstract: A programmable timer circuit (18) includes a counter (22) that contains a plurality of sequentially arranged counter stages (22a, 22b). A toggle logic gate (25) is disposed between each sequential pair of counter stages to accept the output signal from the preceding stage and to issue an input signal to the succeeding counter stage. The logic state of the input signal is determined by the logic state of the preceding output signal and the logic state of a program stage signal from an associated program stage. The logic state of the program signal is determined by the state of a fuse (F) associated with the program stage. Selected fuses can be blown by a programming routine to adjust the time delay between the initiation signal and issuance of the output signal. This sets the counter stages at power-up to a predetermined logic state in which the output signal will be produced with a predetermined time delay when the initiation signal is applied to the integrated circuit.

Abstract: Method according to which, the programming unit (18) transmits, after completion of the programming of the ignition modules, the delay times also programmed to the firing control unit (17). The firing control unit (17) can interrogate simultaneously the ignition modules (15) which send back the information requested to it. The encoded firing control assembly and the encoded ignition modules enable to implement the process.

Abstract: Ignition current is conducted by a firing circuit through a firing pin to a rimer mixture retained by its cap within a cartridge case from which the cap is electrically separated by an insulator to effect primer ignition with reduced lock time by activation of a firing switch independently of the firing pin. Voltage for the firing circuit is derived from a battery, maintained in a charged condition by alternate voltage supply sources, and stored at an ignition firing level for a prolonged period of time to accommodate selective activation of the firing switch after the firing pin contacts the primer cap.

Abstract: In a preferred embodiment, an environmentally insensitive electric detonator system for demolition, including: an object to be demolished; a main explosive charge in proximity to the object to be demolished; electrically activated detonator apparatus including a relatively insensitive initiating charge in proximity to the main explosive charge; and circuitry having input apparatus to receive an input firing pulse and having output apparatus to provide, through arbitrarily long wires, a high voltage in response thereto across the electrically activated detonator apparatus to cause ignition of the main explosive charge.

Abstract: An electronic safe/arm device is powered internally by a low-voltage, periodic power source that has insufficient voltage by itself to fire the detonator. The circuit therefore includes a step-up transformer from which sufficient voltage to fire the detonator is obtained. The step-up transformer charges an arming circuit which stores high-voltage power to fire the detonator and also powers the firing circuit which discharges the stored high-voltage energy through the detonator at the appropriate time, to fire the device. The low-voltage, periodic power source may include a low-voltage battery and a dynamic switch for providing periodic pulses of low-voltage energy to the primary winding of the transformer, and the dynamic switch may be powered from the output of the transformer, so that the low-voltage battery has insufficient voltage to power the dynamic switch.

Abstract: A programmable fuse for a projectile is supplied with voltage during the programming phase by rectifying the inductively transmitted program information. The program information is laid down via a microprocessor (U3) within a non-volatile memory (U4). With the created supply voltage a capacitor C1 is charged. This capacitor is discharged by means of a resistor (R3) and a gate (U2A) into an input (PAO) of the microprocessor (U3). The program information of the non-volatile memory (U4) only can be read only in the event where at launching of the fuse and at activating of a battery (U.sub.B), the predetermined input (PAO) of the microprocessor (U3) shows a predetermined potential ("0").

Abstract: A control signal transmission circuit for transmitting a control signal to a controllable device (21) to control the controllable device (21) and to protect the controllable device (21) against control by component failure generated signals.

Abstract: An extended delay detonator (blasting cap) provides a preselected, electronically controlled delay between an incoming non-electric impulse input signal from, e.g., a shock tube or other input transmission line, and detonation of the output charge of the detonator. The delay detonator has a housing closed at one end and open at the other end for coupling to the input transmission line, the signal from which may be amplified by a booster charge mounted within the housing. A piezoelectric generator converts the optionally amplified impulse input signal to electrical output energy. A battery-powered programmable electric delay circuit is activated by the electrical output from the transducer, counts the preselected delay period, and at the end thereof ignites an electrically operable output charge. A method for interposing a preselected delay between the application of a non-electric impulse input signal and the detonation of the output charge is also provided.

Abstract: 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 delay circuit. A current driver associated with the digital-to-analog converter converts the applied dc voltage to a constant current source, to charge a timing capacitor of the fuze delay circuit for an initial time interval. At two discrete points during this initial charging interval, the voltage across the timing capacitor is sampled and stored. The sampled voltages are applied to a computation circuit to correct for the variations in capacitance which are represented by this difference.

Abstract: A digital delay unit for use in blasting operations and the like provides a selected delay between an input impulse signal and an output impulse signal. The delay unit may have a fixed, preset electronically controlled delay period or, optionally, is programmable to enable user-selected changes in an electronically controlled delay lay period. The delay unit has a housing which serves to connect the input and output transmission lines and house the other components, which includes a piezoelectric transducer which converts the input impulse energy, or the energy released by detonation of a booster charge by the input impulse energy, to electrical energy which is used to generate a first electric signal and a second electric signal. An electronic circuit is responsive to the first electric signal to start counting a preprogrammed delay period, after which a second electric signal is emitted to detonate an output charge which ignites one or more output transmission lines, e.g., shock tubes.

Abstract: 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 oscillator, a counter which counts clock pulses of the clock pulse train, and a circuit for maintaining a reset state of the counter for a predetermined time period after the electric energy is supplied. The counter produces a trigger signal when it counts a predetermined number of the clock pulses, and the electric energy stored in the capacitor is discharged to the ignition element. Since the oscillator enters into the steady state in a very short time by the over-excitation, the delay circuit has large resistance to external noise.

Abstract: A device for indicating the type of ammunition provided in or on the ammunition unit comprises a distinguishable specific identification allocated for each type of ammunition and made up of electronic device with different electrical characteristics depending on the type of ammunition, including a status-changing element which can change between at least two statuses having different electrical characteristics. A control circuit is provided for controlling change-over of the status-changing element between the at least two statuses having different electrical characteristics, the process of the status changes controlled by the control circuit being indicative of the type of ammunition contained in the ammunition unit.

Abstract: A system and method for launching projectiles, such as fireworks projectiles, which explode in the air into a pyrotechnic display. The projectile includes a shell constructed from a binding agent and an explosive additive which explodes the shell into small particles. The explosive additive, which may be nitrocellulose, causes the exploded particles to be rapidly burned and consumed to form lightweight, inert flakes that fall harmlessly to the ground. The projectile is aimed and launched by a launcher using a compressed gas to rapidly expel the projectile from a launching tube. Once in the air at a predetermined location in the sky, an electronic fuse inside the projectile operates to detonate the projectile into its intended pyrotechnic display. The fuse is extremely accurate and enables detonation of the projectile at precise altitudes. An electronic control system controls launching and detonation of the projectiles in a precise and repeatable manner.

Abstract: 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 coupling the primary coil and the secondary coil, an integrated circuit including a square wave oscillator producing complementary output signals, and first and second switching devices. The first switching device is responsive to one of the complementary output signals for causing a current to flow in one direction through at least a portion of the primary coil during a first half cycle of oscillation, and the second switching device is responsive to another of the complementary output signals for causing a current to flow in an opposite direction through at least a portion of the primary coil. The integrated circuit has an enable feature and includes additional protection circuitry for enhancing the safety of the radio frequency attenuating connector.

Abstract: A dipole magnet is placed in a sabot of an explosive projectile. The magnet is arranged and configured within the interior surface of the sabot--such that when the sabot is placed over the casing of the projectile, the majority of the magnetic flux tends to take a path through the projectile casing and between two sensing coils located within the fuze and within the projectile. The first sensing coil forms a larger circle which encompasses the aft end or outer diameter of the projectile which is made up of ferrous materials. The second sensing coil forms a smaller concentric circle (relative to the first sensing coil) and is situated inside the inner diameter of the after end of the projectile, thus encompassing no ferrous metal. The majority of the flux from the magnet enters the ferrous projectile casing, travels through the casing, and exits primarily between the two coils on a continuous path back to the magnet.

Abstract: Intelligent hard-target weapons provide a real-time estimation of a medium as the weapon is penetrating through it. Input signals are provided by an accelerometer used as a primary sensor. On-line concurrent processing of the data of a specific length facilitates a few different modes of feature extraction. The processor provides a robust, real-time decision making for the fuze utilizing sensor signals (accelerometer data). The feature sets utilized include (1) amplitude profiles of the signals, (2) their derivative profiles, and (3), the measure of their abrupt changes. The purpose is to provide for detonation at the proper point as the high-speed penetrator passes through various layers such as concrete, steel, dirt, sand, etc. on its way to a valuable buried target. Real-time decision making is provided for the fuze utilizing accelerometer data.

Abstract: A digital communication network adapts a conventional MIL-STD-1553 aircraft multiple weapons rack for carriage of smart weapons. The network is a communications, power, and signal management interface circuit which permits an existing single pylon wing RT/sub-bus to control a plurality of additional smart RT's. The network utilizes a sub-bus which includes an RT and a bus controller for the multiple stores. The output of the RT/sub-bus is divided to create a plurality of inputs to the additional RT's to establish a power and communications link with the aircraft controller. The network includes a processor which receives coded digital communications from the controller and selectively rebroadcasts those communications to one of the smart weapons on the rack designated by the coded communication.

Abstract: A system for programming the function mode of a munition fuze without supplying electrical power to the fuze includes an arrangement of programmable elements located internally of the munition that are electrically conductive but which remain electrically unpowered until after munition firing, and a programming mechanism located externally of the munition being operable to mechanically program the conductive elements. The programmable elements are a series of concentric bands attached to the interior of the munition casing and spaced from one another along the munition axis and separated from casing wall by an electrically insulating layer. The programming mechanism is a plurality of punch heads aligned with the concentric bands and capable of being actuated such that only selected ones of the punch heads strike the exterior of the munition casing causing an indentation in the casing that penetrates the insulating layer and makes electrical contact with the selected ones of the concentric bands.

Abstract: An integrated and mechanically aided warhead afterbody arming device for siles using mechanical rotation of the missile to arm the warhead is disclosed. A self-contained electrical generation system provides electrical power for the proper arming of the warhead. Mechanical rotation energy is used to generate electrical power for warhead arming. Revolution counters and mechanical detents are used to prevent premature arming.

Abstract: An arrangement for programming the control of a mine including a pin (16) made of a material having a predeterminable magnetic permeability and inserted into a blind bore-like opening in a mine housing (12). Via a coil disposed in the interior of the mine and surroundng the blind bore-like opening, a resonant output frequency f.sub.R) of an oscillator, which frequency is a function of the permeability of the pin (16), is generated. If the detected resonant output frequency (f.sub.R) corresponds to a frequency (f.sub.i) stored in a frequency/address memory (42), an address (A.sub.i) associated with this frequency (f.sub.i) is read out and fed to a read-only memory (44). This determined address (A.sub.i) causes information (I.sub.i) associated with this address (A.sub.i) in the information memory (44) to be read out so that the action belonging to the respective information (I.sub.i) is initiated within the mine.

Abstract: An improved ammunition data transmission system includes alternately applied parallel sources of high frequency of alternating current (AC) voltage and direct current (DC) voltage. The high frequency AC voltage is applied first to provide updated data and to activate the electronic control package for the round in the projectile. the DC voltage then activates the electric primer system for igniting the propellant charge to fire the round. Both the electronics control package and the electric primer system are connected in parallel with the source of AC voltage and, in the preferred embodiment, the parallel connected circuitry contains a capacitor to prevent DC voltage from reaching the electronics control package and an inductor for preventing AC voltage from reaching the electric primer system.

Abstract: An apparatus and method are provided for evaluating the operational status of a weapon interface system ("WIS") for coupling an aircraft controller to a plurality of weapon systems and a corresponding plurality of weapon ejectors. The WIS to be evaluated includes a weapon system interface unit ("WSIU"), a power switching unit ("PSU"), and a power distribution box ("PDB").

Abstract: An intercepting circuit (10) to monitor the electrical current demands (8) of a missile (41) and activate a selected device (21) when the electrical current demands decrease to a predetermined level. The invention permits the retrofit of missiles with mechanisms that would tax or otherwise exceed the electrical capabilities of the missile system.

Abstract: An inductive coupling permits bi-directional data and power to be transferred through the skin of an aircraft thereby avoiding pin connectors. The coupling comprises a sending unit which is detachably mounted to the skin exterior, and the pick-up unit is located on the interior skin surface in alignment with the sending unit.

Abstract: An insensitive electroexplosive device to electrically ignite explosives is isclosed. This device is inherently immune to radio frequency (RF) radiation, and also provides protection against DC or very low frequency RF induced by arcing. A central feature is use of zeners and capacitors to form a reactively balanced bridge circuit. When constructed in semiconductor form as described herein, the device is capable of incorporation in small caliber ordnance.

Abstract: An artillery shell fuze incorporating a long life complete in itself battery and additional features to compensate therefor, which can be programmed to give a very long firing delays e.g.: days, weeks or even months to provide an efficient area denial capability.

Abstract: A model rocket launch controller system which can operate in an automatic or manual mode. Selection between the two modes is determined by a double pole double throw switch. When the controller is placed in the auto mode, power is supplied to an electrical timer which counts down from a user selected time until the zero or ignition time. At such time the power is directed to an igniter circuit. An LCD display shows the remaining until ignition. A flasher circuit is provided to drive an LED to indicate the auto mode has been selected. In the manual mode, power is supplied directly to the igniter circuit when a single pole/push button switch is activated. An LED is also provided to indicate mode has been selected.

Abstract: An electric detonator of the delay type including a housing having a metal portion and an insulating portion, a pair of leg wires extending outside through the housing, a delay circuit connected across the leg wires and generating an ignition current at a predetermined timing, and an igniting resistor connected to an output terminal of the delay circuit and one of the leg wires. In order to check the resistance value of the igniting resistor even after the detonator has been assembled, a by-pass resistor is connected between the other of the leg wires and a junction point between the delay circuit and the igniting resistor. A small measuring current is conducted through the igniting resistor via the by-pass resistor to generate a voltage drop across the igniting resistor. This voltage drop is measured by connecting a voltage measuring device between the leg wire and the metal portion of the housing.

Abstract: In an ignition trigger device for an underwater projectile, a sensor that is connected with electronic means is provided. The sensor is equipped with water outlet openings, and consists of a network of individual lines or contact paths exposed to the entry and exit of water into and out of the underwater projectile, respectively.

Abstract: An electric detonator of delay type including leg wires connectable to bus wires, a capacitor connected across the leg wires for storing the electric energy supplied from an electric blaster via the leg wires, a delay circuit connected across the leg wires and generating an igniting signal at a predetermined timing, a switching circuit and an igniting resistor connected to the switching circuit, whereby the switching circuit is made conductive in response to the igniting signal to discharge the electric energy stored in the capacitor through the igniting resistor to explode the detonator. In order to operate the detonator reliably and safely, there are provided low and high voltage protection circuits for discharging the electric energy therethrough when the power supply voltage is out of a predetermined normal operation range.

Abstract: A torpedo ejects lead weight at the conclusion of a practice run and is bed to the surface for recovery and reuse. A squib is initiated to release the weight by a control circuit which is actuated when the torpedo engine stops. An appropriately interconnected transistor and field effect transistor respond to built-up charges on three charge storage circuits to assure the proper initiation of the squib when the torpedo stops running. The stored energy thus is brought into effect to assure reliable separation and avoids the problems otherwise associated with conventional electromechanical relays.

Abstract: A detonator of the type comprising an electrically-fired fusehead in an explosive charge comprises a conditioning means which has two states, normal and armed, and a control means for effecting a change from normal to armed state. The detonator cannot be fired when the conditioning means is in the normal state, and the control means may comprise electronic circuitry for recognizing and acting only on appropriate control signals. Accidental and unauthorized firing can thus be eliminated. Other embodiments include an actuator incorporating a delay capable of remote precise calibration and a safety device for reducing still further any risks involved when using these detonators in blasting operations. The detonator is preferably in modular form wherein the coupling together of the detonator, actuator, power unit, etc. forms the necessary electrical connections.

Abstract: An apparatus for electrically blasting a number of electric detonators arranged at a plurality of working faces, including a single controller having a power source unit for supplying a D.C. voltage and a plurality of ignition control units for selectively applying the D.C. voltage; a plurality of oscillators each arranged near respective working faces, the number of the oscillators corresponding to that of the ignition control units, each oscillator being energized with the D.C. voltage to generate a high frequency current and being connected to respective ignition control units via an electric wire bundle; and a plurality of lead wires each connected to outputs of respective oscillators. Loop-like leg wires of electric detonators are electro-magnetically coupled with the lead wires with the aid of transformer magnetic cores.

Abstract: An arrangement of modular supporting structure or subassemblies constituted of interconnected circuit boards, especially for the assembly of a complex processing circuit in articles of ammunition possessing a search fuze or in airborne target-tracking bodies. The structures or modular subassemblies of the type considered herein consist of circuit boards arranged in a succession, in which between respectively two adjacent circuit boards, there are formed a series of optronic intersecting connections between coupling elements, wherein in the operational positioning of the circuit boards, a transmitting diode and a receiving detector are arranged opposite each other, which are connected with a multiplexer or, respectively, a demultiplexer.

Abstract: An article of submunition including a fuze or detonating device which can be armed in dependence upon environmental conditions, and wherein the fuze is electrically actuatable from an accumulator or energy storage. The submunition is provided with an in-line detonating medium for the attacking or combat charge of the submunition, whose detonating-energy storage can be connected to an energy source through the interposition of an interrupter across a securing device (safety) which is arranged in a carrier for the submunition. Only a single central securing or safe device is required for all articles of submunitions which are deployable by means of one carrier; in effect, for all fuzes or trigger devices, and this single, central securing device can be arranged within the carrier itself.

Abstract: A timing control system is disclosed which is particularly useful in connection with simulated mortar shells. Special circuitry is provided to assure that the shell does not overshoot, but rather detonates early in case of an improper condition; this ensures that ground personnel will not be harmed by a delayed detonation. The system responds to an externally applied frequency control code which is configured to avoid any confusion between different control modes. A premature detonation routine is entered in case an improper time-setting signal is entered, or if the shell is launched before completion of the time-setting sequence. Special provisions are also made for very early launch situations and improper detonator connections. An alternate abort mode is provided to discharge the internal power supply without a detonation in a manner that can be externally monitored, thereby providing a mechanism for non-destructive testing. The abort mode also accelerates the timing function for rapid testing.

Abstract: In an electrical detonator, an electrical circuit includes a network for rging the fire pulse capacitor. After battery activation and gun launch, but before arming, the circuit (via an n channel MOS transistor within the CMOS) operates to ground the fire pulse capacitor. At "arm minus 50 msec", the n channel is turned OFF and the p channel transistor is turned ON. This charges the fire pulse capacitor to the battery voltage within 50 msec. The CMOS issues an "ARM COMMAND" to fire the piston actuator (PA) discharging the fire pulse capacitor until PA fires. The fire pulse capacitor is recharged in the 50 msec interval between ARM and FIRE. Logic within the CMOS is used to monitor the fire pulse capacitor. These circuits will detect premature voltage on the fire pulse capacitor and DUD the fuze.

Abstract: A NBC hardened double shot grenade launcher utilizes a latching relay and delays to sequentially activate two secondary relays. The delays keep the latching relay from operating until a relay switch transfers supply voltage to enable firing of double the number of salvos without modification of the original supply line.

Abstract: The High "g" support frame comprising a skeletal structure having oversized rame component holes therein is attached to a printed wiring board to aid in supporting electronic components in High "g" environments. The size of the frame component holes and the choice of potting compound is customized to the individual components support need.