Ammunition and explosives – Igniting devices and systems – Ignition or detonation circuit
Patent
1992-09-09
1993-12-21
Tudor, Harold J.
Ammunition and explosives
Igniting devices and systems
Ignition or detonation circuit
102273, 200 6145R, 200 6153, F42C 1906, H01H 3502
Patent
active
052713296
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention falls within the technical domain of the triggering and setting off or explosion of a pyrotechnic charge in relation to an impact between a target and a projectile.
The invention aims in particular at setting off or exploding an explosive charge using an electrical energy source, generally on board, for triggering a detonator.
As an example of its application, the invention aims to trigger, on impact, the explosive charge of preferably large-caliber ammunition.
Projectiles are known that have explosive charges whose triggering is controlled by the operation of a detonator, supplied with electrical current from a storage source, generally consisting of one or more capacitors.
Closing of the electrical supply circuit of the detonator is made to depend on the operation of an impact contactor situated at the front of the projectile.
In order for triggering to occur on impact in a reliable fashion, a certain number of variable factors must be taken into account which could counteract triggering or, on the contrary, promote it inadvertently. These factors are the various possible angles of incidence of the trajectory of the projectile relative to the target, the resistance properties of the target, and also possible vegetation that the projectile may be made to pass through in the course of its ballistic trajectory.
SUMMARY OF THE INVENTION
The object of the invention is to propose an impact contactor that is in fact designed to take into account these variable factors, so that the triggering of the explosive charge, on impact, does not occur during passage through more or less dense vegetation, but still of a light nature, but on the contrary definitely does occur, obviously in the event of frontal impact, but also on impact at any angle of incidence relative to the perpendicular to the target, which can be as much as 80.degree., or even more.
To achieve the above objective, the impact contactor according to the invention is characterized by having: terminals defining an axis of symmetry, terminals and having, in a plane transverse to the axis of symmetry, contact fingers or pins, in electrical contact with the sleeve, mounted to slide freely radially with respect to the axis and urged to move centrifugally by resilient components against an insulating sheath slipped over the outside of the sleeve, distance from the sleeve, but fixed to the base by means of the insulating sheath, the action of a retaining spring, guided in the base, held in continuous electrical contact with the case and able to cooperate with the fingers.
Various other characteristics will be apparent from the following description with reference to the attached drawings which show, as a non-limiting example, one embodiment of the object of the invention.
FIG. 1 is a schematic view illustrating the application of the object of the invention.
FIG. 2 is an axial section through the impact contactor according to the invention.
DESCRIPTION OF PREFERRED EMBODIMENTS
FIG. 1 shows and explosive projectile 1, preferably of large caliber, containing an explosive charge 2 set off or exploded by a detonator 3 supplied with electrical current from a source 4 which can be one or more capacitors charged by means of a piezoelectric-type generator activated by inertia on departure or launching of projectile The current to detonator 3 from source 4 is provided by an electrical circuit, not shown in the drawings, completion of which is controlled by an impact contactor 5 fitted into the front part of projectile 1.
FIG. 2 shows an elevation of impact contactor 5 comprising a base 6 of insulating material with means for adaptation to the body of projectile. Base 6 has at least two contact terminals 7 and 8 passing through it, said terminals having end portions 7a and 8a connected to two conductors 9 and 10 which form part of the electrical circuit established between detonator 3 and current source 4. Preferably, base 6 is made in the form of a body with an external profile of revolution with an axis of symme
REFERENCES:
patent: 2980773 (1961-04-01), Leaman et al.
patent: 3038973 (1962-06-01), Alpert
patent: 3783791 (1974-01-01), Backstein et al.
patent: 3909568 (1975-09-01), Greenhug
Blin Andre
Bonnet Alain
Giat Industries
Tudor Harold J.
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