METHOD AND ARRANGEMENT RELATING TO A WEAPON WITH A BREECHBLOCK

Abstract: The invention relates to an arrangement and to a method for rendering useless a weapon (100) that includes a breechblock, in the event of unauthorised appropriation of the weapon. The arrangement (1) includes an expander (10) which has a cavity (13) or a recess and which is intended for insertion into the box (101) accommodating the breechblock of the weapon. An explosive substance (43) is disposed in the expander cavity (13) or recess. The explosive substance (43) is fired in response to an alarm being triggered, therewith deforming the breechblock accommodating space (101).

Description: METHOD AND ARRANGEMENT RELATING TO A WEAPON WITH A BREECHBLOCK The present invention relates to an arrangement and to a method pertaining to a breechblock-equipped weapon such as to render the weapon unusable in the event of unauthorized appropriation. An object of the present invention is to provide an arrangement and a method by means of which a weapon will be destroyed in conjunction with unauthorised handling of the weapon. This object is achieved with the arrangement and the method having the characteristic features set forth in the Claims . The inventive arrangement assists in making the theft of such weapons uninteresting, by virtue of the fact that the weapon will be damaged to such an extent as to make repair of the weapon extremely difficult and complicated to carry out. The arrangement can be combined with many different types of alarm systems and devices which generate an alarm signal that activates the inventive arrangement so as to destroy the weapon. The inventive arrangement has both technical and economical advantages . The invention will now be described in more detail with reference to exemplifying embodiments thereof and also with reference to the accompanying drawings, in which Fig. 1 is a schematic illustration of a weapon provided with an inventive arrangement; Fig. 2 is a schematic illustration of the arrangement on larger scale; and Fig. 3 is an exploded schematic view of said arrangement. The inventive arrangement 1 includes an expander 10 which is designed to fit in a front part of a so-called breechblock box 101 of a weapon 100. The expander 10 has a front sleeve- part 11 which is designed to fit snugly in the chamber 102 of the weapon. The expander 10 also includes a rear sleeve 12 that has a cavity 13 which communicates with a cavity 14 in the front sleeve 11. The front sleeve 11 has a front opening 15 and the rear sleeve 12 has a rear opening 16. The rear end of the sleeve 12 includes a radial hole 17 for accommodating a so-called detonator or percussion cap 30. The rear sleeve 12 carries an externally arranged guide pin 18 which forces the expander 10 to its correct position of rotation when said expander is positioned in its intended place in the breechblock box 101 of the weapon. The guide pin 18 is guided by the magazine holder 103 of said weapon and also functions as a handle when inserting the expander 10 into the weapon and when removing said expander 10 therefrom. The expander 10 also includes an end plug 20 which is screwed into the rear part of the sleeve 12. The end plug 20 has an external thread 21 which mates with an internal thread 19 on the sleeve 12. The end plug 20 has a square screw head 22, by means of which the plug 20 can be screwed firmly into the sleeve 12. The end plug 20 also includes an air passageway 23 for communication between the hole 17 and the cavity/space 13 in said sleeve 12, and for accommodating the detonator 30. When required, the air passageway 23 is filled with explosive, so as to ensure that a fully effective explosion will take place. The inventive arrangement 1 also includes a so-called burst tube 40 which is shaped and sized to fit into the barrel 104 of the weapon 100, as evident from Figs. 1 and 2. The burst tube 40 has an inner, rear cavity 41 and an inner, front cavity 42 which are filled respectively with an explosive substance or device 43, 44, such as pentyl or the like. Disposed within the tube 40 is, e.g., a pentyl fuse 45 which establishes communication between the two explosive substances or devices 43 and 44. The front end of the tube 40 includes an internal thread 46 which receives an external thread 52 on the rear end 51 of a fixing pin 50, therewith enabling the pin to be screwed into the tube 40. The length of the pin 50 is such that said pin will project beyond the muzzle of the barrel 104 when the inventive arrangement is mounted in the weapon 100, therewith enabling the front end 53 of the pin 50 to be anchored in some desired way relative to the weapon and/or its surroundings. The inventive arrangement 1 also includes a striking or firing pin arrangement 60 that includes a firing pin 61 which is held in a rearward/inactive position by means of a compression spring 62. The firing pin arrangement 60 includes an electrically activated explosive charge 63 which communicates, via an electric igniter wire 64, with a firing device 70 which is adapted to deliver an electric signal that activates the explosive charge 63 when necessary, therewith driving the firing pin 61 against the detonator 30 and therewith cause the detonator 30 to fire the explosive charges/explosive devices 43-45. The firing pin arrangement 60 and the detonator means 70 are preferably incorporated in a dummy magazine 80, so as to minimize the possibilities of manipulating the arrangement. The firing device 70 will normally receive its activating signal through the medium of an alarm circuit 90 provided, for instance, in a protective housing in the form of a weapon case (not shown) or the like. The fixing pin 50 may include a pivot means 54 which enables the pin to be pivotally mounted in the weapon case or bag, and the dummy magazine 80 may be anchored firmly inside the case or bag. The inventive arrangement 1 is fitted to a weapon 100 in the following way. The detonator 30 is fitted to the expander 10, which includes the sleeves 11 and 12 and the end plug 20 screwed into the rear part of the sleeve 12. The expander 10 and the detonator 30 attached thereto are then positioned in the breechblock box 101. The breechblock 105 is then brought into abutment with the screw head 22, so as to hold the expander 10 in position, wherewith the sleeve 11 is guided into the chamber 102 of said weapon. The burst tube 40 is then inserted into the barrel 104 of the weapon, with the aid of the fixing pin 50 screwed to the burst tube 40, so that the explosive charge 43 will be located within the internal space 13 of the expander 10 and so that the explosive charge 44 will be positioned in the barrel 104 of the weapon. The dummy magazine 80, with the firing pin arrangement 60 and detonator 70 attached thereto, is then fixed to the weapon 100, with the firing pin 61 located close to the detonator 30. The detonator arrangement 70 is then connected to a suitable 5 alarm circuit 90. Figs. 1 and 2 illustrate the inventive arrangement 1 fitted in a weapon 100. When an alarm is triggered in response, e.g., to an attempt to steal the weapon, the alarm circuit 90 will activate the detonator arrangement 70 so that an electric signal will be produced and activates the explosive charge 63 to drive the firing pin 61 against the detonator 30 which, in turn, fires the explosive charges/explosive devices 43-45. The forces generated by the explosive charge 43 deform the expander 10 and destroy the breechblock box 101 and those parts of the weapon surrounding the breechblock, while the forces generated by the explosive charge 44 deform the barrel 104, therewith rendering the weapon 100 useless. When a weapon which has been alarmed in accordance with the invention is removed by an authorised person, the alarm is first deactivated and the weapon then separated from the dummy magazine 80 prior to removing the fixing pin 50 and its connected burst tube 40 from the weapon. The expander 10 and its connected detonator or percussion cap 30 are then removed from the weapon, whereafter the breechblock 105 can again take its forward end position. It will be noted that the inventive arrangement 1 is very safe to handle, since the component parts of the arrangement are separated safely with regard to accidents, since the dummy magazine 80 and the firing arrangement 70 and firing pin arrangement 60 connected to said dummy magazine are first removed from the weapon before dismantling other component parts. The firing arrangement 70 is well protected inside the dummy magazine 80. Unauthorised attempts to deactivate the 6 alarm, for instance by shooting the inventive arrangement to pieces, will also result in destruction of the weapon. In a simplified embodiment, the explosive charge 44 and the pentyl fuse 45 can be omitted and solely the explosive charge 43 in the expander 10 retained. In this case, the burst tube 40 and the fixing pin 50 can be excluded if desired, and the explosive charge 43 placed directly inside the space 13 of the expander 10 and the opening 15 sealed-off . In the case of the simplified embodiment, the forces generated by the explosive charge 43 will primarily deform the front part of the breechblock box 101. The chamber 102 and the rear part of the barrel 104 will also be deformed to some extent. In a further simplified embodiment of the invention, the detonator or firing cap 30, the firing pin arrangement 60 and the detonator arrangement 70 can be excluded and replaced with an electric detonator mounted directly in the passageway 23, in which case the alarm loop 90 is connected to the electric firing device just mentioned. Although not shown, the air passageway 23 may include a branch in the form of a small subsidiary passageway which opens out adjacent the firing pin in the breech block. This will channel a part of the explosive force in the expander 10 towards the breechblock 105 so as to damage or destroy the same. Damage to the breechblock can be amplified, by mounting in the subsidiary passageway a hardmetal pin or the like that is capable of penetrating the breechblock. The subsidiary passageway may also be provided with a separate explosive charge, so as to further ensure destruction of the breechblock. The expander 10 and the burst tube 40 are conveniently made of steel or some other suitable metal, so that the surrounding parts of the weapon will be fused together in the explosion. Various types of explosive may, of course, be used in conjunction with the present invention. It will be understood that the design of the inventive arrangement can be varied within wide limits, for instance by substituting the described components with functionally equivalent components . It will also be understood that the invention is not restricted to the described and illustrated embodiments, and that changes and modifications can be made within the scope of the following Claims.

Claims: 8 CLAIMS 1. An arrangement for rendering a weapon that includes a breechblock unusable in the event of unauthorised appropriation, characterised in that the arrangement (1) includes an expander (10) which is provided with a cavity (13) or a recess and which is intended for insertion into the breechblock box (101) of the weapon; and in that an explosive substance (43) is disposed in the expander cavity (13) or recess. 2. An arrangement according to Claim 1, characterised in that the expander (10) has a relatively thin surrounding wall in the region of the explosive substance (43) , so as to enable deformation of the expander (10) and the space (101) that accommodates the breechblock. 3. An arrangement according to Claim 1 or 2, characterised in that the expander (10) has a front sleeve part (11) which is designed to fit snugly in the chamber (102) of the weapon. 4. An arrangement according to any one of Claims 1-3, characterised in that said arrangement (1) includes a firing pin arrangement (60) and a detonating arrangement (70) . 5. An arrangement according to Claim 4, characterised in that the firing pin arrangement (60) and the detonating arrangement (70) are housed in a dummy magazine (80) that can be connected to the magazine holder (103) of the weapon. 9 6. An arrangement according to any one of Claims 1-5, characterised in that the arrangement (1) includes a burst tube (40) and a fixing pin (50) . 7. An arrangement according to any one of Claims 1-6, characterised in that the expander (10) includes an end plug (20) which has an opening (23) for accommodating a detonator or percussion cap (30) or some other firing device. 8. A method of rendering a weapon that includes a breechblock useless in the event of unauthorised appropriation, characterised by placing an expander (10) in the breechblock box (101) of the weapon; and causing the expander (10) to be deformed with the aid of an explosive substance (43) or the like so as to render the weapon useless in response to an alarm being triggered. 9. A method according to Claim 8, characterised by using a firing pin arrangement (60) and a detonating arrangement (70) for activation of the explosive substance (43) in response to an alarm being triggered.

Inventors: LINDSKOG KJELL, LINDSKOG MAGNUS, LINDSKOG, KJELL, LINDSKOG, MAGNUS
Applicants: LINDSKOG KJELL, LINDSKOG MAGNUS, SQS AB, LINDSKOG, KJELL, LINDSKOG, MAGNUS, SQS SECURITY QUBE SYSTEM AB
Application year: 1999
Main classification: F41A17
IPC codes: F41A17