Abstract: A safety and arming mechanism wherein a sliding member is held in an out-of-line position breaking the fuze train. An actuator releases the sliding member and moves the sliding member, which contains a stab detonator, in-line and towards a firing pin completing the fuze train. Arming and detonating occur at the same time when the fuze train is completed and the stab detonator is impaled on the firing pin.

Abstract: A safety device for a fuze of a spinning projectile comprises a spin acceleration safety element and a firing forward acceleration safety element. The firing forward acceleration safety element contains a ball displaceable by the action of the firing forward acceleration. The spin acceleration safety element employs an escapement or delay mechanism including an asymmetrically structured balance wheel whose center of gravity is radially displaced from its pivot axis such that the escapement or delay mechanism can begin to operate and time out only after the spin acceleration has ceased to be effective.

Abstract: In a weapon subject to a sequence of high acceleration followed by high spin and including a detonator and an explosive charge; the improvement comprising a barrier located between the detonator and explosive charge to normally form an obstruction to prevent accidental detonation of the explosive charge by the detonator. Mechanical locking means are provided to lock the barrier in place, comprising a spirally wound ribbon, a pair of pins restraining the outer surface of the ribbon to prevent premature unwinding, and a pair of superimposed anti-friction balls mounted on a hub portion of the ribbon, the upper ball being seated in an extension portion of the barrier. When the weapon is fired from a gun, the high acceleration will remove the pins and allow the ribbon to unwind. Upon unwinding the entire ribbon, the balls will be released and the barrier under the action of spin, will be removed to provide an unobstructed path between the detonator and explosive charge.

Abstract: An adaptation cartridge comprises a firing pin casing which is screwed into a cartridge chamber or cartridge chamber tube and is secured against rotation by a radially displaceable slide. The cartridge is used for training on a gun having a subcaliber barrel adapter.

Abstract: A feature of this invention is the provision of a forward, armor piercing, high explosive charge and an aft anti-personnel high explosive charge in a shrapnel providing casing, both charges being functioned by a single, deceleration sensitive, detonator assembly.

Abstract: A fuse for a spinning projectile comprises a rotor having safety elements which prevent rotation of the rotor to an active position. The safety elements are arranged such that when the safety elements are properly installed, the center of gravity of the rotor induces rotation of the rotor in a first direction toward the active position. An escapement mechanism regulates the rate of rotation of the rotor in such first direction. A stop prevents rotation of the rotor in the opposite direction. When a safety element is missing, the center of gravity is positioned to induce rotation of the rotor in such opposite direction in which the rotor cannot rotate.

Abstract: In small-caliber, barreled-weapon ammunition with head or base fuses, detonator safety is achieved in that the inadvertantly ignited detonator which is a secure position within a rotor remains without effect on an intensifying charge. Measures are provided for the gas to expand within the fuse and the energy of the rotor fragments used up so that the gas expanding direction and the flight direction of the fragments face away from the explosives of the intensifying charge. Expansion chambers are formed by recesses in the fuse for safety devices adjacent the rotor, such as different centrifugal force-dependent safety devices for the firing pin which are separated from each other by breaking locations destroyable by the gas.

Abstract: A fuze includes a conically shaped body having a central longitudinal chal communicating with a rearward central chamber, a firing pin assembly containing a primary and a biased secondary firing pin disposed in the channel, a delay arming assembly disposed in the chamber, a sleeve containing a setback locking assembly disposed in chamber, and a pyrotechnic smoke cartridge located in the hollow of the sleeve. The arming assembly contains two V-shaped pivotable levers held in the safe position by the secondary firing pin extending into a hole in each lever and by a detent pin extending into a hole in the lower lever, each lever having a hole containing a firing ball. On firing the projectile from the gun, the biased detent pin is withdrawn by setback force and the detents on the secondary firing pin are withdrawn by centrifugal force, releasing both levers to pivot by centrifugal force and align the firing balls with the firing pins and the cartridge primer.

Abstract: 44A fuze is provided for projectiles of the nonspinning and slow spinning types which possess a rotor that carries a detonator, and a first safety device preventing the rotor from bringing the detonator to an active position. The first safety device is responsive to acceleration force when the projectile is fired, to release the rotor for at least limited rotation. A second safety device permits only limited rotation of the rotor unless released. Release of the second safety device occurs in response to retardation of the fired projectile after the latter leaves the barrel and encounters air resistance. Release of the second safety device is possible only after a predetermined amount of rotation of the rotor when a locking bolt of the second safety device becomes aligned with an orifice in a stationary frame that mounts the rotor.

Abstract: A spinning projectile fuze contains a rotor which is retained by a safety spring in the form of a substantially ring-shaped disk in a safety or unarmed position. To enable the ring-shaped disk to release the rotor it must be pressed flat both by the firing acceleration and also by the spin. This ring-shaped disk possesses cut-outs or recesses by means of which it is subdivided into segments which are bent in an undulated or wave-shaped configuration.

Abstract: The invention relates to a fuze safety device (1) for an ammunition unit such as a projectile, shell, rocket or the like. The safe and armed conditions of the fuze safety device are defined by a movable slide or rotor member which takes a first position in safe condition and a second position in armed condition and cooperates with at least two locking elements (7, 8). Each locking element has its own condition for release and in their released positions they permit the movable member to assume its second position. The locking members (7, 8) are arranged to cooperate mutually in such a way that both of the locking elements are released when their release conditions occur in a first order but release of at least one of the locking elements is inhibited if release conditions occur in a second order.

Abstract: A safety apparatus for a spinning projectile fuze comprises a rotor with which there is operatively associated a toothed segment which, under the action of the spin, drives a retarding or restraining mechanism and following expiration of the action of the retarding mechanism moves the rotor into its armed or live position. The safety apparatus further comprises a spin safety element and an acceleration-spin safety element. The acceleration-spin safety element contains a ball displaceable by the action of the firing acceleration, and a disc member, and the spin safety element possesses a piston displaceable by the action of the projectile spin in order to release the rotor.

Abstract: In a spin-stabilized projectile, an improved ignition fuse arrangement for a pyrotechnic ignition charge. The ignition charge is mounted in a rotor which is movable from a safety position to an armed (active) position. This rotor is held by actuating means in the safety position and is released by the actuating means and moves to the armed position when the projectile has been subjected to predetermined centrifugal and inertial forces. The actuating means include biasing means which are biased against the rotor to maintain it in its safety position.

Abstract: The present invention relates to a safety device for a pyrotechnic assembly in a projectile, provided with an explosive charge, and comprising a mobile member actuated by a clockwork mechanism with pivoting regulator and with drive pinion and able to occupy two different positions, for the first of which the ignition of said explosive charge is prevented, while for the second of said positions the ignition of this explosive charge is possible, wherein said mobile member is housed in a recess in said projectile and encloses the clockwork mechanism, as well as a disengagement lever blocking in said first position any movement of said member with respect to the projectile but whose action may be inhibited by said clockwork mechanism and, in the first position, the axis of the pivoting regulator is merged with the axis of rotation of said projectile.

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.