Abstract: The invention relates to a fuse for a satellite projectile that is expelled from a carrier projectile. In order to maintain a defined ignition time within narrow tolerances, despite initial blind position of the fuse immediately after the expulsion of the satellite projectile, the firing pin 7 is centrally arranged in the interior of a key-shaped cover 12 which is movably disposed in the interior of a housing 1. The wall 12' of the cover 12 has a plurality of recesses 5' into which there engage a corresponding number of locking pins 5 mounted on sheet metal springs 4. These springs 4 are radially outwardly swingable and are secured to the housing 1. The locking pins 5 prevent an axial movement of the firing pin 7 during the safety inactive-position-period and prevent thereby a radial outward swinging of the detonator support 15 into the ignition position.

Abstract: An underwater ignition device is provided comprising a rotor, a detonator disposed at the rotor, a locking pin secured in position by a safety pin, a release pin maintained in position by the locking pin, a first water pressure safety device normally engaging the rotor and preventing a rotating motion of the rotor into an ignition position and a second water pressure safety device actuable after the locking pin is removed and after the first water pressure safety device has been actuated and capable of actuating the release pin for rotating the rotor into an ignition position. An ignition circuit employed comprises a digital logic connected to an analog receiver, dual driver stages connected to the digital logic, parallel discharge circuits connected to the dual driver stages and to a detonator and the voltage supply and suitable for selectively igniting the detonator or for short circuiting the voltage supply. The digital logic actuates two discharge circuits in successive time intervals (t.sub.1, t.sub.

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: An underwater ignition device is provided comprising a rotor, a detonator disposed at the rotor, a locking pin secured in position by a safety pin, a release pin maintained in position by the locking pin, a first water pressure safety device normally engaging the rotor and preventing a rotating motion of the rotor into an ignition position and a second water pressure safety device actuable after the locking pin is removed and after the first water pressure safety device has been actuated and capable of actuating the release pin for rotating the rotor into an ignition position. An ignition circuit employed comprises a digital logic connected to an analog receiver, dual driver stages connected to the digital logic, parallel discharge circuits connected to the dual driver stages and to a detonator and the voltage supply and suitable for selectively igniting the detonator or for short circuiting the voltage supply. The digital logic actuates two discharge circuits in successive time intervals (t.sub.1,t.sub.2,t.

Abstract: A fuse apparatus for a depth charge or the like has a primary fuse that operates at a relatively shallow depth to position a detonator in line with a firing pin, and a secondary fuse that operates to release the firing pin to explose the detonator. A safety mechanism normally prevents operation of the primary fuse, but can be canceled to allow such operation. The secondary fuse cannot itself operate until the primary fuse has operated, so that the two fuses must operate successively to set off the detonator. In addition the two fuses operate along mutually perpendicular axes, so accidental jarring of the device cannot set it off. Finally the arrangement is constructed to leak slightly so that in the event it fails to go off it will rapidly become inoperative.