SE501497C2 - Exercise mine and ways to slowly activate it - Google Patents

Abstract

Training mine (1) containing a current supply unit (17), an electric release mechanism (18) and an effect unit (21) consisting of an ignitor, a detonator and dye marker is characterized by a mechanical activation means for slowly activating the displacement sensitive electric circuit (16) of the mine and a method therefore, said mechanical activation means by use of two assembled but, independently of each other, motion-restraining means, the spring force of the one means being slightly larger than the retarding force of the cold flowing material in the other means, accomplishing a delayed mechanical activation of the electric circuit (16) enabling the person overseeing the training to place the mine in the terrain before the activation is complete, thus enabling the mine to react on slight displacement.

Description

15 20 25 30 Q 501 497 This has therefore resulted in a strongly expressed need for new training equipment for the purpose, and which can give the necessary respect, without harming either the training leader or ammunition clearance personnel, but well mark the burst of careless behavior or carelessness during disarmament.

In view of the fact that actual mining often involves the distribution of thousands of sub-parts over one and the same area, an educational exercise should also include relatively large amounts of exercise equipment, which places great demands on the lowest possible acquisition cost.

The training in munitions clearance includes, in addition to the search for mines, also the neutralization of the same. Disarmament of found exercise mines must thus also mimic a real situation where, either by pointing at the mine or by carefully placing a remotely explosive dough above the mine, from a safe distance, it must be possible to neutralize and thereby destroy the exercise mine.

Destructive disarmament of training mines is desirable from an educational point of view but hardly from a cost point of view. The requirement for an active exercise mine will therefore also be able to offer the possibility to, without disturbance, deactivate it so that it can be reused and stored and again, after recharging and slow activation, placed out and again function as a disturbance-sensitive active exercise mine.

CHARACTERIZATION OF THE INVENTION The practice mine according to the invention and the method of slowly activating it, is based on a device of the kind set out in the preamble of the appended claim 1, and is characterized mainly by the outer surrounding easily exploded capsule with the externally accessible charging connector. the fuse and the activation mechanism with its fuse sleeve, as well as the internal, essential parts for the function, such as the power supply unit, the disturbance trip mechanism, the lighter, the detonator and the color marking. Characteristic of the device according to the invention is the design of the activating mechanism which, in order to achieve a longitudinal activation, in the form of a time-delayed closure of an electrical circuit, utilizes the cold-flowing property of a strand-shaped material which inserted into the cavity of a coil spring and thereby brakes the otherwise instantaneous resilience movement after the coil spring has been bent. When the electrically conductive coil spring with inserted brake material, after slow resilience, has closed the circuit in the mine's electrical system, the mine is activated. If the coil spring is bent again, without the series-disrupted disturbance release mechanism being triggered, the line is deactivated and can be secured in this position with a fuse sleeve and then reused at another time.

Characteristic of the device according to the invention is further that the power supply unit, for safety reasons, reuse reasons and not least environmental reasons, consists of a capacitor adapted to the purpose, which via two electrical contacts accessible on the outside of the mine, can be charged or short-circuited to be re-discharged. recharged. The capacitor gradually loses its charge and makes the mine completely deactivated after a while, should it be forgotten after the exercise. The capacitor can also be safety short-circuited with a conduction between the contacts on the outside during manufacture as well as during storage and transport, in order to finally be broken by the exercise conductor just before the mine is to be charged before the first exercise session.

Characteristic of the method according to the invention, to slowly activate the exercise mine, is to use a slow cold-flowing material, brake the normally instantaneous resilience of an electrically conductive coil spring, and thereby delay the connection of the motion-sensitive, electric tripping mechanism in time. the electrical system, until long after the mine has been laid out on the practice field and is stationary. The delay time is a function of the factors spring dimension, spring material, degree of bending, distance to the contact and depending on the choice of cold surface material also the ambient temperature. This technical solution means the lowest possible cost and that the electrical circuit does not become electrically demanding until the actual moment of disturbance. The invention is defined in the appended claims.

The invention will be described in the following in connection with non-limiting examples of a device in the form of an exercise mine and a method of slowly activating it, in connection with the accompanying drawings and wiring diagram.

The number designations are continuous and consistent in the figures.

DRAWING Figure 1 shows in a perspective view an embodiment of the inventive exercise mine (1), which here is composed of two tightly joined outer parts (2), the upper one of which is provided with the two charging connections + (4) and - (5) and the one below protective device for slow activation (6).

Figure 2 shows in an enlarged perspective view the two securing device rigs (7) and (8) on the upper side of the exercise mine. The fuse device (7) is an electrical short-circuit conductor between the charging coils (4) and (5), intended to be broken only just before the first charging event. This makes charging and ignition impossible, which ensures handling during manufacture, storage and transport.

The securing device (8) is a securing sleeve of non-conductive material and is intended to be slid over and enclose the activating member (6) in the securing position (10).

The securing sleeve may be provided with a resilient locking fl ik (9) to secure the position (10) until it is appropriate to manually secure and allow the activating means (6) to slowly activate the exercise mine, after it has been loaded and placed on the exercise field.

Figure 3 shows a symbolic vertical view of the exercise mine (1), and in particular the function of the activating means (6), which at one end is firmly anchored in the contact (1 1) connected to the internal electrical circuit, under the insulating the protection (12).

The actuating means (6) according to the invention consists of an electrically conductive coil spring in which the horn is inserted into a string-shaped material with suitable cold-surface properties which, after the spring has been bent with contents, is able to slowly brake the resilience movement (13) and again time delay the activation of the activating means (6) to position (14) which involves electrical contact with the positive charging contact (4) and thus activated activation of the mine.

Examples of materials with suitable cold-surface properties for this purpose are metals such as tin and lead and thermoplastics of the polyolefin type, etc. The practice mine in this example has been found to be completely satisfactory with the use of ordinary strand-shaped solder inserted in a coil spring.

Figure 4 shows an electrical circuit diagram useful for the invention, which starts from the external charging and activating unit (15) and further shows the electrical circuit (16) connected on the inside, which for charging contains a capacitor (17) directly connected to charging contacts (4) and (5).

The actuating means (6) is connected in series with the electric vibration release mechanism (18), which can be constituted by a tilting, electrically conductive coil spring inside an electrically conductive tubular sleeve surrounding at a reasonable distance. When the tilting spring, in connection with a disturbance of the training mine, bounces only in short-term contact with the pipe sleeve, the electrical circuit (16) must instead, via the series-connected resistor (19) trigger the thyristor (20) which, only when sufficient ignition voltage has been reached , opens the electrical circuit with the capacitor (17), so that it momentarily drains all its charged voltage and ignites the power unit (21), which contains an electric / pyrotechnic lighter connected to a suitably dimensioned pyrotechnic detonator, supplemented with color yarn or powder set for a permanent marking.

That the invention and the inventive method can also be used together with an oversized pyrotechnic detonator, i.e. a sharp and harmful, disturbance-sensitive mine, should from this description appear to be quite clear and close to the person skilled in the art.

Finally, Figure 4 also shows the two fuse devices (7) and (8), such as line-marked symbols in the wiring diagram where the short-circuit conductor (7) is part of the electrical circuit system and must be cut off manually with pliers before charging, and the fuse sleeve (8) in both fuses as a secured (10) position.

Claims (7)

10 15 20 30 501 497 6 PATENT LANGUAGE Exercise mine (1), containing a power supply unit (17), a disturbance-sensitive electric trigger mechanism (18) and a power unit (21), consisting of detonator and color marking, characterized by a mechanical actuating means accessible from the outside of the exercise mine ( 6), consisting of two interconnected, but separately anti-motion bodies, one of which, from its secured starting position, after the unsecured becomes motion-driving and the other at the same time, but to a lesser extent, becomes motion-inhibiting, so that together they act a time-delayed and slowly delayed mechanical movement used for electrical activation of the exercise mine's disturbance-triggering circuit (16), long after the exercise leader has unsecured and deployed the exercise mine in the terrain and it is stationary pending the slightest disturbance. Exercise mines, according to claim 1, characterized in that, in the actuating means (6), the driving force means consists of a, after deformation, strongly resilient material, preferably spring steel. Exercise mine, according to luav2, characterized in that the motion-sensing member preferably consists of a spring steel spiral. Exercise mines, according to claim, characterized in that the, in the activating means (6), to a somewhat lesser extent the movement-preventing means consists of metal or tin plastic with the possibility of slow cold under surface under load. 5. The exercises, according to claims 1 or 4, are characterized in that, relative to the motion-driving member, the somewhat less motion-inhibiting member is preferably constituted by a strand-shaped solder. 10 15 20 25 30? 501 497 Exercise mine, according to claim 1, characterized in that the power supply unit (17) consists exclusively of a rechargeable capacitor and that the mine after charging, due to mechanical movement-delayed activation of the exercise mine's disturbance-sensitive electrical tripping circuit (16), does not consume any drive circuit. at all times from the unsecured, for slow activation, until the moment of disturbance when the capacitor instead momentarily empties the main part of its electrical charge and via the igniter the detomatom and power marking in the power unit starts (21). A method of longitudinally activating an exercise mine (1), containing a power supply unit (17), a disturbance-sensitive electric trigger mechanism (18) and a power unit (21), consisting of lighter, detonator and color marking, characterized in that the activation process of the disturbance-sensitive electrical tripping circuit (16), after the unsecuring takes place, mechanically and completely automatically and that, through the use of two built-in but separately anti-motion means, one of which, from its secured starting position, after the unsecured becomes motion-driving and the other at the same time, but to a lesser extent, becomes obstructive, together producing a time-delayed and slowly delayed mechanical movement which is used for electrical activation of the exercise mine's disturbance-triggering circuit (16), long after the exercise leader has unsecured and placed the exercise mine in the terrain and the lies still pending the slightest disturbance.