Abstract: The invention relates to a fuze for a gyratory projectile, including a striker holder movable about a rocker axis perpendicular to the axis of symmetry of the fuze, a primer holder rotatable about an axis of rotation parallel to the axis of symmetry, and a self-destruction device. The latter includes an SD mechanism using the linear acceleration of the projectile upon the departure of the shot to store axial kinetic energy, and a safety mechanism using the centrifugal effects of the projectile during the flight to store radial kinetic energy. The two mechanisms cooperate with each other, and with the striker holder and the primer holder to generate the different storage positions before firing, intermediate upon the departure of the shot, cocked during the flight and of self-destruction at the end of the flight, guaranteeing maximum safety of the projectile in the storage position and maximum responsiveness of the projectile regardless of the scenario encountered during ballistic firing.

Abstract: A delay release device that connects to an aerosol filled canister that releases the aerosol in a delayed manner. The device includes a main body with a first plunger assembly mounted on one end. Formed adjacent to the first plunger assembly is a first chamber filled with a compressed gas pressurized from 40 to 150 psi based on the time delay desired. In the main body adjacent to the first chamber is a second chamber and a third chamber. Located inside the third chamber is a second plunger with a hollow stem introduced into a top valve assembly on the canister. To activate, the first plunger assembly is pressed inward which activates a second valve disposed between the first and second chambers. The second valve allows compressed gas to flow slowly from the first chamber into the second chamber and into the third chamber.

Abstract: A delay unit (10) comprises a timing strip (14) and, optionally, a calibration strip (20) deposited on a substrate (12). The timing and calibration strips comprise energetic materials which optionally may comprise particles of nanosize materials, e.g., a fuel and an oxidizer, optionally applied as separate layers. A method of making the delay units comprises depositing onto a substrate (12) a timing strip (14) having a starting point (14d) and a discharge point (14e) and depositing onto the same or another substrate a calibration strip (20). Timing strip (14) and calibration strip (20) are of identical composition and are otherwise configured, e.g., thickness of the strips, to have identical burn rates. The calibration strip (20) is ignited and its burn rate is ascertained.

Abstract: A delay unit (10) comprises a timing strip (14) and, optionally, a calibration strip (20) deposited on a substrate (12). The timing and calibration strips comprise energetic materials which optionally may comprise particles of nanosize materials, e.g., a fuel and an oxidizer, optionally applied as separate layers. A method of making the delay units comprises depositing onto a substrate (12) a timing strip (14) having a starting point (14d) and a discharge point (14e) and depositing onto the same or another substrate a calibration strip (20). Timing strip (14) and calibration strip (20) are of identical composition and are otherwise configured, e.g., thickness of the strips, to have identical burn rates. The calibration strip (20) is ignited and its burn rate is ascertained.

Abstract: A pyrotechnic initiation delay device intended in particular to cooperate with a device for firing a pyrotechnic charge of the fuze type, particularly for a hand grenade, having a delay composition located inside a delay column, the latter having a lower end and an upper end, a percussion primer being able to cooperate with the upper part of the delay column, and a striker piston held firmly under the lower end of the delay column and able to move axially in the direction of the element to be struck under the action of an explosive charge cooperating with the lower end of the delay column. The delay column communicates with the explosive charge through a cavity containing plugging means allowing or preventing movement of the striker piston under the effect of the explosive charge.

Abstract: In well perforating operations, it is necessary to detonate shaped charges suspended in the well. To avoid dangerous detonation at the surface, a pressure responsive mechanism is set to respond to a pressure indicative of operation at a selected depth. This pressure setting arms the detonator in cooperation with an electrical arming mechanism operative in response to a selected current flow at a required voltage for a selected interval.

Abstract: A time delay device adapted to cooperate with a firing device. The time delay device comprises a piston cooperating with the firing device, a spring to move the piston between a first position in which the firing device remains in a non-operating condition and a second position in which said firing device is allowed to operate, a retractable pin to hold the piston in the first position, a reservoir of fluid adapted to be acted upon by the piston and communicating with a length of small bore or micro-bore tubing whereby upon movement of the piston fluid will be displaced from the reservoir through said tubing, with the rate of movement of the piston, and therefore the time for the piston to move from the first to the second position under the action of said spring, being dictated by the viscosity of the fluid in the reservoir and the length of the tubing.

Abstract: A time delay device for, in use, combination with a firing device demolition of the type having a pivotable member adapted to release a firing pin to detonate an associated explosive element. The time delay device comprises a pivotable member adapted to release a piston arrangement one end of which arrangement being exposed to fluid within a chamber. A control piston is also provided having one end exposed to fluid in the chamber via a supply port, and a valve is provided to set the rate of transfer of fluid through the supply port under the influence of the pressure exerted by the release of the piston arrangement.

Abstract: A base member mounted on a projectile with a movable member mounted thereon for radially outwardly sliding movement in response to spinning of the projectile, the movable member having a center of gravity located at a first point which prevents the sliding movement thereof and the center of gravity being shiftable to a second point by the controlled flow of a predetermined mass, e.g. steel balls, which shifting of the center of gravity allows the movable member to slide from the safe to the arm position.

Abstract: A fuzing device for a submunition or munition comprises an airtight housing ontaining a pressure chamber communicating through an orifice to a diaphragm with a firing pin attached thereto. The fuze is actuated by pressurizing the chamber with gas which flows through the orifice at a predetermined rate until the total pressure on the diaphragm causes it to deform sufficiently to activate a detonator.

Abstract: The present invention relates to a fluid controlled timer comprising a cydrical housing, and a close-fitting rotary shaft positioned co-axially within the housing. A spiral passageway scribed between the housing and the rotary shaft extends between the ends of the housing. The spiral passageway contains a viscous liquid and a sphere slidably disposed therein and capable of traversing the entire passageway length. An external constant torque spring connected to one end of the rotary shaft causes the rotary shaft movement while resistance to such movement results from interference of the sphere during its traverse through the spiral passageway, thus providing an extended time delay.