SE430722B - DEPARTMENT OF THE SECRET ORGAN DEVICE OF THE SECRET ORGAN - Google Patents

Description

8202721-'0 EEDOGÖWELSE FOR THE INVENTION TECHNICAL PROBLEM there is a desire to be able to use electric lighters for various fuse elements in related contexts.

As an example of this, it can be mentioned that it is desired to be able to arrange a reinforcement igniter and an initiation igniter in connection with said fuse housing and rotor. However, the use of electric lighters makes the tripping chain as such prominently sensitive to external disturbances that can trigger the safety system.

In order to obtain a higher safety in connection with a reinforcement igniter, it is possible, for example, to use such an electric igniter which is arranged in the fuse housing and which, when initiated, pushes away a locking pin, which in the non-triggered position of the electric igniter locks the rotor to the fuse housing. completely pushed into a recess in the rotor so that the rotor is exposed from the fuse housing at the fuse element in question. The said push-off of the locking pin takes place with the aid of gas.

However, the gas developed by the reinforcement igniter will penetrate into a gap between the fuse housing and the rotor and could penetrate to the detonator and initiate it if no special measures were taken.

THE SOLUTION The object of the present invention is, inter alia, to create a device which solves the above-mentioned problems and what can then mainly be considered as characteristic of the new device is that an initiation lighter, preferably an electronic one, for said ignition unit, e.g. detonator, cooperates with or comprises a displaceable penetrating part, for example a cushion, that the ignition unit is arranged in the second part behind an initiation-preventing barrier, preferably formed by goods present at the second part, that in said unsecured position penetrates the penetrating part during its ejection through the latch and initiates the ignition unit, that the second part carries an eye assigned protective portion which in said secured position is opposite the eye and which in case of triggering of the initiation igniter in the secured position prevents the penetration part from reaching the eye at the same time as the penetration part is assigned a deformation or changed position, and that the protective part, due to its deformation or its changed position, interacts with a stop means which prevents the movement in the second part from arising or continuing and thereby prevents the second part from bringing the ignition unit to the unsecured position in front of the eye.

Further developments of the inventive concept are proposed in more detail on how said latch is to be formed in connection with a first and a second securing means at the first and second parts. The ignition unit is then arranged in the second part in a recess extending from the first part of the second part. surface and terminates at a distance from the second surface of the second part opposite the first surface. The remaining goods between the bottom of the recess and the second surface thereby form the said barrier. In said further developments, said protective portion further has the shape of a protective tongue which is deformable or bendable by the penetrating part when it is pushed away in the secured position. The stop means may preferably consist of a lug or equivalent which is fixed in relation to the second part.

Said protective tongue is arranged to cooperate with said heel in its deformed or bent state or position.

ADVANTAGES Through the above proposed, a barrier or a roof is obtained, through which, respectively, which the penetrating part or the cylinder must penetrate in order to reach and initiate the ignition unit, for example in the form of an explosive capsule. Said detonator will thus be protected when the reinforcement igniter is initiated and pushes away the locking pin mentioned above. The gas used to push said locking pin away is thus effectively prevented from penetrating and initiating the detonator. Thanks to the use of said penetration part or pellet, a precise ignition of the detonator can take place.

Without such a penetration part or pellet, the entire barrier 8202? 21 * 0 or the roof would have to be pressed down, which would give rise to an uncontrollable ignition. In the event that the penetration part or pulley utilizing the initiation igniter should ignite before the reinforcement igniter, the protective portion or tongue will be in the path of the penetration part and be deformed or bent by the penetration part. This deformation or bending of the protective portion is used to lock the movable part so that it is prevented from performing or completing its movement. In this way, the detonator is prevented from reaching its position in front of the eye.

DESCRIPTION OF THE DRAWINGS A presently proposed embodiment of a device having the features significant for the invention will be described below with simultaneous reference to the accompanying drawings, in which Figure 1 shows in a vertical section parts of fuse means at a fuse housing usable in an ammunition unit and a reinforcement igniter and an initial igniter are included, figure 2 in vertical section shows parts of the housing and the rotor according to figure 1, figure 3 in a horizontal section shows a protective tongue arranged in the rotor according to figure 2, and figure 4 in a vertical section shows the parts according to figure 2, said protective tongue is deformed by a cushion extendable by the initialization igniter.

BEST EMBODIMENT Figure 1 is intended to illustrate parts of a per se known fuse means which comprise a fuse housing 1 and a rotor 2 arranged therein. The rotor is locked in a per se known manner to the fuse housing by means of a fuse element 3 when it occupies a untriggered mode or state. In the present case 8202721. The securing element 3 is constituted by a reinforcing electric lighter which can be initiated in a manner known per se when an ammunition unit, in which the securing means in question is arranged, is inserted into or ejected from a fire tube. In the present case, such a reinforcement igniter is used which comprises a locking pin 4, which in the untriggered position of the reinforcement igniter locks the rotor to the fuse housing. When the armature igniter is triggered, the locking pin 4 is pushed completely into a recess 5 in the rotor 2 so that the rotor is exposed relative to the fuse housing 1 and can perform a movement during which the rotor moves an explosive capsule 6 from a secured position next to an eye 7 to an unsafe position in front of said eye.

Figure 1 shows the case where said locking pin 4 has been inserted completely into the recess 5 of the rotor so that said exposure has taken place. Furthermore, the rotor 2 has performed said movement and brought the detonator 6 to its position in front of the eye 7. The insertion of the locking pin 4 in the corresponding recess 5 can be performed by means of a powder set initiated by an electrical resistance bridge in the reinforcement igniter. The said resistance bridge is in turn initiated by electrical circuits in the ammunition unit. In the untriggered position, the locking pin 4 with upper parts is located in a recess 8 which in the untriggered position of the reinforcement igniter is opposite the recess 5 in the rotor. In said untriggered position, said locking pin protrudes into the corresponding recess with lower parts so that the reading of the rotor to the fuse housing takes place.

The fuse housing also has a recess 9 for said reinforcement electric lighter, which recess 9 adjoins the recess 8.

The rotary axis of the rotor is indicated by line 10.

Said securing means also comprises an initiation igniter 11 which can be initiated at abutment or equivalent. The initiation igniter comprises for said stop or correspondingly sensitive electrical circuits 11a, which at the stop or equivalent initiate a powder set or corresponding set 11b included in the initiation igniter. The initiation igniter comprises or cooperates with a penetration part in the form of a pellet 12. The pellet is arranged in a recess 13 in the fuse housing, which recess 13 adjoins a recess 14, in which the initiation igniter 11a, 11b is arranged. When the powder set 11b is activated, the pellet 12 is pushed away. The rotor 2 has a lower side 2a and an upper side 2b. The rotor is further provided with a recess 15, in which said detonator 6 is placed. The recess 15 then extends from the lower surface 2a and terminates at a distance from the upper surface 2b. The remaining goods 16 then form a barrier or a roof.

When the rotor has moved the detonator 6 to the unsecured position shown in Figure 1 in front of the eye 7, the roof or barrier 16 is in the path of the pellet 12. In order to be able to initiate the detonator 6 with the pellet 12, the pellet must thus penetrate the roof or the barrier 16. The initiation igniter is arranged so that at its initiation it pushes away the pellet so that said penetration of the roof or the barrier 16 takes place at the same time as the pellet 12 in a manner known per se, initiates an ignition charge 6a in the detonator. The ignition set 6a in turn ignites the main set 6b of the detonator, which in turn is intended to ignite via the eye 7 a main set not shown here, which in a manner known per se can be arranged in an affected ammunition unit. The detonator 6 does not have to comprise a special ignition set 6a and main set 6b but may very well comprise a single set. Under the detonator a further part 17 is arranged which is included in the securing means in question and which is fixed in relation to the rotor 2. At the initiation of the main set 6b, the detonation path penetrates the goods in the part 17 and ignites the set in the eye 7.

The securing means shown in Figure 1 shall function as follows. The reinforcement igniter must be activated before the initialization igniter. According to the above, the reinforcement igniter is initiated at a certain distance after the mouth passage. The rotor 2 is released in connection with the release of the reinforcement igniter and the rotor 2 can perform its movement in a manner known per se with utilized drive devices.

After a time determined by the speed of movement, the rotor has inserted the detonator 6 in the unsecured position in front of the eye 7. The initiator igniter is then initiated and the pellet 12 is pushed through the roof or latch 16 and ignites the detonator 6. This in turn activates the ammunition unit's main kit.

In the event that the initiation igniter is for one reason or another initiated before the reinforcement igniter, the ignition of the detonator 6 must be prevented and thus the activation of the main kit. For this purpose, the rotor is provided with a protective portion which preferably has the shape of a protective tongue 18 according to Figure 2 which shows the case where the rotor is in an initial position. In this initial position, the detonator not shown in Figure 2 is located next to the eye 7, which consists of a recess in a part 19 which is also included in said securing means. Said part 19 is arranged separately in relation to the part 17. In the case shown in figure 2, the reinforcement electric lighter has not been tripped but keeps the rotor 2 in its secured position. If the initiation igniter in this secured position is triggered unintentionally, the protective tongue 18 will be in the firing path of the pellet 12, which thus cannot penetrate down through the part 17 and further out into the eye 7 towards the main set of the ammunition unit. A stop 20 is arranged in the part 17. The protective tongue 18 is then arranged so that it is bent down by the pulley 12 if it is inadvertently pushed away by the initiation igniter in the secured position. When the protective tongue is not bent or affected by the pulley, it goes free from said stop 20. If said deflection or deformation, on the other hand, has taken place, see figure 4, the protective portion 18 will co-operate with the stop 20 so that movement in the rotor 2 is prevented or prevented. continue. In Figure 3, the direction of movement has been indicated by the arrow P1.

The protective arrangement as above thus functions in such a way that if the securing elements 3 and 11 are triggered in the correct sequence, the protective tongue 18 will be able to pass the stop 20. If, on the other hand, the initiating igniter is actuated before the reinforcing igniter is bent or deformed, the protective tongue , as a result of which the rotor cannot perform its movement to move the detonator 6 to its position opposite the eye 7. The protective tongue 18 thus has double functions in that it partly functions as a stopping means for the rotor 2, and partly prevents the pellet 12 from penetrating down to the eye 7. .

The stop 2Q has been shown as a heel, but may also assume other configurations, which also applies to the protective tongue as such.

The invention also works for other types of fuse elements that use electric lighters. In the case shown, the gas used for driving the locking pin 4 in the reinforcement igniter is prevented from reaching the ignition cap 6 via the gap 21 formed between the rotor 2 and the fuse housing 1 thanks to the use of said roof or latch 16. The pulley 12 also prevents the gas from penetrating up towards the initiation lighter 11 and ignite the charge 11b. The invention is not limited to the embodiment shown above by way of example but may be subject to modifications within the scope of the appended claims and the inventive concept.

Claims (6)

8202721-'0 PATENT CLAIMS Device at securing means comprising a first part (1) and a second part (2) movable relative thereto, which in a secured position is locked to the first part and upon its release from the first part is arranged to perform a movement and during this bring an ignition unit (6) from a position next to an eye (7) to an unsafe position in front of the eye, characterized in that an initiation lighter (11), preferably an electronic one, for said ignition unit (6) cooperates with or comprises a displaceable penetrating part, for example a cushion (12), that the ignition unit is arranged in the second part behind an initiation-preventing barrier (16), preferably formed by goods present in the second part , that in said unsecured position the penetrating part during its firing penetrates the lock (16) and initiates the ignition unit, that the second part carries an eye assigned protective portion (18) which in said secured position is opposite the eye and which in case of triggering the initiation igniter in the secured position prevents the penetration part from reaching the eye at the same time as it is assigned a deformation or changed position by the penetration part, i.e. that the protective portion by its deformation or changed position cooperates with a stop means (20) which prevents movement (P1) in the second part arise or continue, thereby preventing the second part from bringing the ignition unit to the unsecured position in front of the eye. Device according to claim 1, characterized in that the first and second parts (1, 2) are secured to each other also with a second securing means (3) which upon its initiation provides a gas evolution line and that said barrier prevents the gas reach said ignition unit (6) and initiate it. Device according to claim 1 or 2, characterized in that the ignition unit is arranged in the second part in a recess in the same, which recess extends from the first surface (2b) of the second part and ends at a distance from the the second surface (2a) of the second part, the remaining goods between the bottom of the recess and the second surface forming said barrier. 8202721-0 10 Device according to claim 1, 2 or 3, characterized in that the protective portion (18) has the shape of a protective tongue which is deformable or bendable by the penetrating part (12) when it is pushed away in the secured position. 5. Device according to any one of the preceding claims, characterized in that the stop means (20) consists of or comprises a lug, shoulder, or similar part which is fixed in relation to the other part. Device according to claim 4 or 5, characterized in that the protective tongue (18) in its deformed or bent condition or position is cooperable with said lug, shoulder or similar part.