Abstract: An electrical delay detonator for blasting initiation systems and the like energized solely by a force input from a non-electric signal communication system, which detonator has a hollow, electrically conductive housing enclosing a booster charge connected to the source of non-electric input force, a transducer positioned in force communicating relationship with the booster charge for converting the output force from the booster charge to an electrical output signal, an electrical circuit connected to the output of the transducer for introducing a time delay in the electrical output from the transducer and an electrically operable igniter element.

Abstract: A delay fuse for a warhead (1) including at least two charges (3, 8) for sequential detonation disposed inside a casing (2). The delay fuse comprises a screen (6) movable in a longitudinal axial direction inside the casing (2) and under the effect of the first charge detonating, from a starting position to a destination position in which it acts on control means (12) for firing a second charge. The fuse includes a component of compressible material (13) disposed inside the casing between the screen (6) and the control means (12). The invention is applicable to shells, rockets, or missiles.

Abstract: A static arming device for a bomb having a housing and a main charge therein is provided and consists of a portable power source and a fuse ignitor carried within the housing. The fuse ignitor is for detonating the main charge and is electrically connected to the power source. A mechanism is for selectively activating and deactivating the power source so as to arm and disarm the fuse. Another mechanism is for detonating the fuse ignitor after the power source is activated and when the rocket bomb impacts a target.

Abstract: An apparatus for detonating explosive charges at a given location in response to an initiation at a remote location and after a preselected delay comprises a non-electrical initiation device for generating a non-electrical energy input by detonation or pyrotechnical combustion at the given location and initiated at the remote location, and an electrical igniter also at the given location responsive to the initiation device for time-delayed ignition of the explosive charge. The electrical igniter includes a transducer for generating an electrical output signal in response to the non-electrical energy input, an electronic variable time delay igniter in close proximity to the transducer for setting a preselected time delay and for generating a time delayed electrical output signal and an igniter also in close proximity to the electronic time delay means for initiating the ignition of the explosive charge.

Abstract: A piezoelectric power supply for a fuze assembly includes a stacked array of piezoelectric ceramic discs, a hollow can for holding the stacked piezoelectric discs, flexible electrical circuits interposed between the discs and the interconnecting respective positive and negative faces of the discs. The can is deformable upon receipt of a predetermined pressure impulse for transmitting the pressure to the discs. The flexible circuits conduct electrical current and provide positive and negative terminals for supplying electrical power upon deformation of the can and the piezoelectric discs by the pressure impulse.

Abstract: A device for use in a weapon system provides electrical energy for fuzing the weapon system. The device includes a detonator disposed within a housing, with the detonator being in association with a piezoelectric element such that upon detonation, the piezoelectric element is exposed to sufficient pressure to produce electrical energy. A firing pin mechanism is detachably attached within the housing in a pre-detonation position and is capable of detachment at a selected pressure and movable after detachment to a detonation position, detonating the detonator for the production of electrical energy.

Abstract: A piezoelectric fuse, and safe and arm mechanism for a small active projectile is disclosed including a piezoelectric element mounted within the projectile near the leading end thereof with an impact deformable electrically conductive shell spaced from and at least partially surrounding the piezoelectric element and a resilient material substantially filling the space between the piezoelectric element and the shell. Electrical leads connect the detonator to the shell and to a rearward piezoelectric element contact so that upon projectile impact, the shell deforms compressing the piezoelectric element generating a voltage thereacross, and thereafter, the shell makes electrical connection with a piezoelectric element forward contact actuating the detonator. The safe and arm mechanism includes an interrupter located in a "safe" position between the detonator and a lead charge.

Abstract: A device for ignition of a pyrotechnic material, comprising:(a) piezoelectric means for providing a high voltage electrical pulse in response to mechanical energy;(b) means for emitting a flash of light in response to the high voltage pulse; and(c) a solid state laser capable of emitting a light beam sufficient to ignite a pyrotechnic material in response to said flash of light;and a process of igniting a pyrotechnic device using the same, are disclosed.

Abstract: A spark gap transmitter mounted in the base plug of a projectile and powdd by the piezoelectric effect of ferroelectric crystals deformed upon projectile impact. The transmitter emits an RF pulse train in the S-band which may be detected by appropriate equipment which compares the impact point with the target location for aim point correction purposes.

Abstract: An igniter for use in a vehicle having gas generating material which upon ignition produces gas for inflating an inflatable occupant restraint. The igniter comprises a pyrotechnic transmission line having one end located adjacent the gas generating material. The pyrotechnic transmission line includes a housing and a plurality of pyrotechnic cords located in the housing and extending for substantially the length of the housing. A pair of electrically conductive members are located at a position spaced from the one end of the pyrotechnic transmission line. Each of the members have a portion disposed within the housing. The members are spaced apart. A spark is generated between the members to heat and thereby ignite the pyrotechnic cords in response to a sensor sensing deceleration of the vehicle at a rate above a predetermined rate of deceleration.

Abstract: A piezoelectric fuse, and safe and arm mechanism for a small active projectile is dislcosed including a piezoelectric element mounted within the projectile near the leading end thereof with an impact deformable electrically conductive shell spaced from and at least partially surrounding the piezoelectric element and a resilient material substantially filling the space between the piezoelectric element and the shell. Electrical leads connected the detonator to the shell and to a rearward piezoelectric element contact so that upon projectile impact, the shell deforms compressing the piezoelectric element generating a volatge thereacross, and thereafter, the shell makes electrical connection with a piezoelectric element forward contact actuating the detonator. The safe and arm mechanism includes an interrupter located in a "safe" position between the detonator and a lead charge.

Abstract: A detonator triggering device which is located in the head of an underwater projectile, and wherein a pressure receiver which is positioned within an opening in the projectile head is exposed to a dynamic pressure or velocity head. A piezo-ceramic disc which is equipped with electrical contacts is rigidly supported on one side thereof in the head of the projectile, and with its other side contacts against a pressure transmitting member which is supported within the opening in the head. As a result, the dynamic pressure will act against the piezo-ceramic disc. Every change in the dynamic pressure consequently provides for a corresponding change in the charge or change in the voltage of the piezo-ceramic disc. This permits itself to be processed in an electronic evaluating or gating circuit, such that the applicable voltage change is employed as the actuating criteria.

Abstract: The projectile fuse comprises a piezoelectric generator located forward of a piercing part (2) and formed by a striker (5), a hammer (6) and a crystal (8). The firing device comprises a watch movement (11) providing a muzzle safety and making possible the positioning of a rotary support (15) for at least one primer (24). A part (2) of material with high mechanical resistance acts as the piercing head for the projectile after the dislodging of the electric generator at the moment of impact and effectively protects the watch movement (11) and the rotary support (15).

Abstract: The technical area of this invention is initiation delay mechanisms for warheads carrying two tandem-mounted shaped charges.With this invention the initiation delay mechanism consists of using the movement of a screen placed between the forward charge 1 and the rear charge 2. According to a specific characteristic, as it moves, the screen can close an electric circuit by means of contactors placed in a given position. According to other variants, the screen can impact piezoelectric components generating energy or, in the case of a magnetic screen, can cross an induction coil.Application in the field of projectiles and, particularly, of rockets and missiles.

Abstract: Arrangement in a fuse for projectiles with explosive charge for changing over between direct and delayed ignition of the explosive charge. The arrangement includes a movable contact member which in an initial position short-circuits an electrical igniter which is designed for direct ignition of the explosive charge. A locking member in the form of a pin in an initial orientation of the projectile takes up a position in which the contact member can move under the influence of the accelerational forces effective on the projectile to a second position where the contact member is held by a detent device. With a second orientation of the projectile the pin, as a result of its own weight, drops down to a position where it prevents the contact member moving from the said initial position.

Abstract: 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 using a field effect transistor circuit to interrupt a transducer generated pulse as a gate for a silicon controlled rectifier which passes a triggering pulse.

Abstract: An electrical detonator element including a support formed of an electrically nonconductive material with an ignition resistance and lead electrodes arranged thereon. An electrical circuit for enabling detonation is formed on the support and includes the ignition resistance and at least one electronic component each separately arranged on the support.

Abstract: An impact fuze for barrel weapon ammunition of the type whose velocity of flight continuously decreases from the time of firing with increasing duration of flight, including a circuit arrangement for avoiding the actuation of a detonation when the impact sensor of the fuze impinges on a rain drop. The circuit arrangement is connected to the impact sensor to increase the detonation response sensitivity of the entire impact fuze during flight of the fuze.

Abstract: Generator for generating electrical ignition or detonation energy in a spin projectile through a piezo element utilizing the spin of the projectile for generating the electrical energy. The piezo element lies against the interior of the projectile shell and is polarized radially relative to the longitudinal axis of the projectile. Preferably, the piezo element is of tubular configuration. A core is radially movably supported interiorly of the projectile shell so as to charge the piezo element during the rotational acceleration of the projectile.

Abstract: A generator for generating electrical ignition energy through a piezo element in a spin projectile. A guide band on the projectile deforms upon entry into the riflings of a weapon barrel. To generate the ignition energy due to the deformation of the guide band, the piezo element is a tubular member polarized radially relative to the longitudinal axis of the projectile. The outer circumference of the piezo element lies against the projectile shell. The piezo element is stiffened along its inner circumference by a stiffener ring positioned thereagainst.

Abstract: A piezoelectric element unit and sheet metal mount therefor has a window opening for readily mounting the unit therein without the necessity for using tools and for stably holding it despite repetitive beating by the hammer of the actuation mechanism. The unit is formed as a cylinder with a pair of opposite grooves axially extending in or on the circumferential surface of the unit so as to engage the side edges of said window. When the grooves are cut directly in the circumferential wall of the unit, a second window formed to be interconnected with the aforementioned window for mounting the actuation mechanism is designed to have a width longer than the diameter of the unit so that the unit is first located in the second window and then slid into the first window.

Abstract: An electrical projectile detonator, particularly a base detonator, containing a piezoceramic cell as a current generator. The cell is retained against the inside of the projectile base or base screw. A rupture plate is positioned on the outside of the base at a predetermined spacing from the cell. The rupture plate is adapted to be disintegrated by the gas pressure of the projectile propellent charge to thereby produce a shock wave in the projectile base. This shock wave propagates within the projectile and loads the piezoceramic cell so as to generate a voltage in the cell.

Abstract: A recess or cavity is formed on the exterior of a fuze ogive. A piezo-eleic tape is positioned within the cavity or recess. Fluctuations in the pressure within the recess, caused by air flow over the exterior of the fuze, will cause the piezo-electric tape to produce an electrical signal or current.

Abstract: An electrical projectile detonator, particularly a base detonator or fuse which incorporates a piezoceramic cell as a current generator wherein it is possible to generate a voltage through the intermediary of the gas pressure of a pyrotechnic explosive charge. The piezoceramic cell is arranged in a tail-ended cup-like recess of the projectile base, or in a threaded base, so as to be positioned against an intermediate base element serving as an anvil and covered by a pressure plate, which by means of the gas pressure of the projectile impelling charge acting on a tail-ended closure disc or the like during the discharge of the projectile, can be pressed against the piezoceramic cell.

Abstract: An acoustic emission contact fuze that is responsive to high-frequency actic emission stress waves and distinguishes between such waves caused by impacts and signals caused by the operating environment.

Abstract: Projectiles exist with a stored electrical charge during flight and an elrically energized detonator which activates upon impact. Premature activation in flight, which can be caused by spurious voltage, is eliminated by the addition of a voltage threshold blocking device. Detonator activation will then occur, as intended, by the voltage released upon impact.

Abstract: 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, with the generator raising the voltage of the first condenser to a level necessary for the igniter and that of the second condenser required for operation of the delay circuit.

Abstract: An ignition or firing voltage generator adapted to be actuated only proximate the peak of an inertial force and, in its equilibrium position will not emit a voltage even when subjected to hard shocks. A piezoceramic cell, as well as a solid body which is arranged axially adjacent thereto, are located within a preferably cylindrical support member which is axially displaceably guided within a tubularly-shaped component of an igniter housing, but in the initial position thereof is so restrained through the utilization of a securing element in the configuration of a shear element, spring fastener or the like, that its base is located at a defined spacing opposite a base plate of the igniter or detonator housing. A securing element of that type, without difficulty, may be so dimensioned that it will only first release the support member, when it is influenced by approximately the maximum inertial force.

Abstract: A detonator comprises a housing which contains a weak explosive charge igable by a bridge wire and a piezoelectric semiconductor buffer positioned in the housing for receiving a shockwave from the weak explosive charge when it is ignited. A high voltage lead is connected to the buffer for applying a high voltage signal to the buffer. If the high voltage signal is applied to the buffer at the same time that the weak explosive charge is ignited, the piezoelectric buffer will amplify a shockwave from the ignited charge to produce a detonation charge of sufficient amplitude to ignite a secondary or main charge which can form part of the detonator or be positioned against a surface of the detonator. In this way only the simultaneous ignition of the weak explosive charge and the activation of the piezoelectric buffer will cause ignition of the secondary or main charge.

Abstract: An electrically detonated fuse for a grenade is shown, used either as a b up system for the usual mechanical detonator, or independently as the sole arming and detonating means. The invention is considered more accurate and dependable than a mechanical system, which is aimed at the objective of reducing the amount of grenade duds, the dangerous phenomenon of still live grenades unexploded upon impact creating a hazardous situation for military and other personnel. The invention uses the ordinary action of the currently used inflated ribbon which is extended from the grenade while it is in flight, to generate an electromotive force signal via a piezoelectric crystal. An electrically activated detonator is installed next to the grenade's main charge, for blowing the device when the electrical detonator is switched on. A large surge of power is fed to the electrical detonator by the closing of an electrical impact fuse, when the grenade physically impacts a target.