Inner tube, in particular for an irritant cartridge, having a plurality of sub-bodies

Abstract

The invention relates to an inner tube (14), in particular for an irritant cartridge (10), having a housing (22) and a plurality of sub-bodies (24), wherein: • the sub-bodies (24) are arranged one above the other within the housing (22), • the outer circumference of the sub-bodies (24) is adapted to the inner circumference of the housing (22), • the sub-bodies (24) have a central opening (24a) for ignition, • a reflection ignition means (38), in particular a reflection gauze disk (38), is arranged on a cover (26) of the housing (22), wherein the reflection ignition means (38) ensures a reflection of the ignition flame, • wherein flame return paths (24b) are formed on the circumferential surface of the sub-bodies (24).

Description

[0001] "A bombshell, especially for an irritant cartridge with multiple subbodies"

[0002] The invention relates to a bombette, in particular for an irritant cartridge, with the features of the preamble of claim 1, namely a bombette, in particular for an irritant cartridge, with a housing and a plurality of subbodies, wherein:

[0003] • the subbodies are arranged one above the other within the casing, • the outer circumference of the subbodies is adapted to the inner circumference of the bombette,

[0004] • the subbodies have a central opening for ignition.

[0005] The generic patent DE 30 31 369 A1 discloses a charge for generating an artificial fog blanket and comprises fog mixtures. The fog mixtures are arranged in the form of compressed bodies within a bombette, i.e., a casing. The compressed bodies have predetermined breaking points. The compressed bodies have a disc-shaped, cylindrical form adapted to the bombette. This round shape ensures complete utilization of the space within the bombette. The compressed bodies are provided with slots that form channels into which igniters are inserted. The slots simultaneously function as predetermined breaking points at which the compressed bodies burst during ignition. The igniters are inserted into the channels formed by the slots in the compressed bodies, creating direct contact between the igniter and the fog body. Upon ignition, the compressed bodies break at the predetermined breaking points, releasing the fog in all directions.

[0006] Known irritant cartridges essentially consist of a primer located in the base of the cartridge, an ignition element above it, and at least one compressed irritant compound in the form of at least one subbody. These subbodies contain a pyrotechnic igniter and an irritant. The subbodies are arranged in a bombette. The subbodies consist of a mixture of an igniter and a required amount of irritants such as chloroacetophenone (CN) or chlorobenzylidene malononitrile (CS). The irritant is contained in a smoldering compound. Upon combustion, i.e., after ignition by the primer, the igniter heats the smoldering compound and releases the irritant in the form of irritant gas. Various designs of irritant cartridges with a caliber of 40 mm are known from DE 10 2020 004 562 A1. These irritant cartridges comprise a cartridge case, a bombette, and several irritant subbodies.Each bombette contains eight or twelve irritant sub-sub ...

[0007] The invention is therefore based on the objective of improving the bombette and the ignition of the sub-bodies.

[0008] This problem underlying the invention is now solved by a bombette with the features of claim 1, namely a bombette, in particular for an irritant cartridge, with a housing and a plurality of subbodies, wherein:

[0009] • the subbodies are arranged one above the other within the casing, • the outer circumference of the subbodies is adapted to the inner circumference of the bombette,

[0010] • the subbodies have a central opening for ignition,

[0011] • a reflective ignition device, in particular a reflective gauze disc, is arranged on a lid of the housing, wherein the reflective ignition device ensures a reflection of the pilot flame, • wherein flame return channels are formed on the circumferential surface of the subbody.

[0012] The subbodies are of identical construction and arranged with their central openings aligned with one another. The central openings form a central cavity, within which ignition takes place. The bombette comprises a substantially cylindrical housing, several subbodies, a lid, a delay charge for igniting the subbodies, a hollow rivet with an ignition charge, and an ejection charge for ejecting the ignited subbodies from the housing. Upon ignition, the flame is transported upwards through the cavity or the central opening, reflected by the reflective ignition device, in particular a reflective gauze disc, and then returned via the external flame return channels. This results in more effective ignition of the subbodies at their outer circumference than in prior art designs.When the flame returns through the flame recirculation channels, an ejection charge at the base of the bombette is activated, causing the ejection of the sub-bodies. By recirculating the ignition flame via the external flame recirculation channels, a double ignition is achieved, increasing ignition reliability. The interaction with the ejection charge also ensures controlled and reliable ejection of the sub-bodies. The present invention relates to a cylindrical bombette for an irritant cartridge with a specific arrangement and design of sub-bodies that enables reliable and controlled ignition as well as effective ejection of the sub-bodies. In a preferred embodiment, the reflective gauze disc is impregnated with black powder coating, which ensures effective reflection and recirculation of the ignition flame, thereby increasing ignition reliability and the efficiency of the flame recirculation channels.

[0013] The adjustment of the outer circumference of the subbodies to the inner circumference of the bombette ensures a stable arrangement, thus preventing the subbodies from slipping.

[0014] It is preferred that the central opening of the subbodies is designed to allow a limited number of symmetry positions, ensuring the alignment of the flame recirculation channels. A preferred embodiment is characterized in that the central opening of the subbodies is oval. An oval opening is easy to manufacture and allows exactly two symmetry positions. Alternatively, the central opening can have a triangular or star shape.

[0015] It is preferred that the number of flame recirculation stages be between 3 and 10. Limiting this to 3 to 10 recirculation stages provides sufficient flexibility for adaptation to different designs and requirements, while simultaneously ensuring an adequate number of flame recirculation stages for pilot flame recirculation.

[0016] It is preferred that the number of flame recirculation channels be an even number to ensure a symmetrical arrangement of the flame recirculation channels. Using an even number of flame recirculation channels enables a symmetrical arrangement that improves the uniformity of the flame and promotes symmetrical ignition and exhaust behavior. In a preferred embodiment, six flame recirculation channels are formed on each subbody.

[0017] It is preferred that the recirculation channels are uniformly spaced around their circumference. This facilitates the achievement of symmetrical subbody configurations with aligned flame recirculation channels.

[0018] It is preferred that the cylindrical subbodies are manufactured by a pressing process. A pressing process using a die and a punch enables cost-effective production of the subbodies. Furthermore, the pressing process ensures precise and reproducible shaping of the subbodies.

[0019] The cylindrical subbodies are preferably provided with a coating, the coating comprising an ignition layer. The subbodies can have an ignition layer at least on one end face. It is possible for the ignition layer to be present on both end faces. The ignition layer can also be present on the circumferential surface. The at least partial coating of the subbodies with an ignition layer improves the ignition capability of the subbodies and ensures reliable and uniform ignition and thus release of the irritant.

[0020] Limiting the number of sub-bodies to 4 to 8 allows for an optimal balance between the stability of the bombette and the maximum efficiency of the ejection charge. This ensures an even distribution of the ignition force.

[0021] The bombette is specifically designed for an irritant cartridge, with the sub-body containing an irritant such as chloroacetophenone (CN) or chlorobenzylidene malononitrile (CS). The irritant is contained in an irritant smoldering mixture. This mixture consists of an irritant component and a smoldering agent component as a homogeneous blend. The smoldering agent component serves as the pyrotechnic heating element. Upon ignition, the smoldering agent component reacts in an exothermic reaction, generating heat and gases. The actual irritant (CS) is neither burned nor ignited, as this would cause it to decompose. The heat and the resulting gases cause the CS irritant to be emitted and dispersed into the air.

[0022] The invention relates to such an irritant cartridge with a bombette. The caliber of the irritant cartridge is preferably 40 mm.

[0023] There are now numerous possibilities for designing and further developing the bombette. Reference is first made to the claims subordinate to claim 1. A preferred embodiment of the invention is explained in more detail below with reference to the drawing and the accompanying description. The drawing shows:

[0024] Fig. 1 shows a schematic sectional view of an irritant cartridge with a bombette and several sub-bodies arranged inside the bombette.

[0025] Fig. 2 shows a schematic sectional view of the bombette,

[0026] Fig. 3 shows a schematic sectional view, a top view of one of the subbodies,

[0027] Fig. 4 shows a schematic sectional view along the plane AA of the subbody,

[0028] Fig. 5 shows a first side view of the subbody, and

[0029] Fig. 6 shows another side view of the subbody.

[0030] Fig. 1 shows a schematic representation of an irritant cartridge 10. The irritant cartridge 10 includes, by way of example, a substantially cylindrical casing 12, a bombette 14, a propellant charge 16 for driving the bombette 14 out of the casing 12, a lid 18 that seals the upper opening of the casing 12 in a moisture-tight manner (as shown in Fig. 1), and in the base of the casing a percussion cap 20 for igniting the propellant charge 16, as well as a seal 40 between the bombette 14 and the propellant charge 16.

[0031] The bombette 14 is shown separately in Fig. 2 and comprises a substantially cylindrical housing 22, several subbodies 24, a lid 26, a short ignition tube in the form of a hollow rivet 28, a delay charge 30 for igniting the subbodies 24, an ignition charge 32 arranged in the hollow rivet 28, and an ejection charge 34 for ejecting the ignited subbodies 24 from the housing 22. The housing 22 is received substantially coaxially in the sleeve 12. The subbodies 24 are received in the housing 22. The lid 26 closes the upper opening of the housing 22 shown in Fig. 1. The ignition tube 28 extends essentially coaxially within the housing 22 from a lower end wall 22a of the housing 22. The propellant charge 16 is arranged between, on the one hand, the base of the cartridge case and, on the other hand, the lower end wall 22a and the delay charge 30, and is adjacent to the primer 20. The delay charge 30 is arranged in a dome of the end wall 22a.The ignition charge 32 is arranged at the lower opening of the ignition tube / hollow rivet 28 and on the delay charge 30. The ejection charge 34 is arranged on a lower end wall 22a of the housing 22 around the lower end of the ignition tube 28 or the hollow rivet 28.

[0032] To fire the cartridge 10, the primer 20 is ignited, for example, by means of a firing pin (not shown), thereby igniting the propellant charge 16. The ignited propellant charge 16 ignites the delay charge 30 and simultaneously pushes the bombette 14 in FIG. 1 upwards away from the base of the cartridge case, causing it to blow off the cap 18 and fly out of the cartridge case 12. The ignited delay charge 30 burns during its flight and ignites the primer charge 32, producing a flame that spreads upwards through the ignition tube 28 into a cavity 36 between the sub-bodies 24, igniting them.

[0033] Four subbodies 24 are arranged one above the other in the bombette 14. The four subbodies 24 are arranged one above the other within the housing 22. The outer circumference of the subbodies 24 is adapted to the inner circumference of the housing 22. The outer circumference of the essentially cylindrical disc-shaped subbodies 24 preferably corresponds to 95% to 100% of the inner circumference of the housing 22. The shape of the subbodies 24 can be described as tablet-shaped.

[0034] The subbodies 24 each have a central, oval-shaped opening 24a for ignition and are preferably arranged in alignment with one another such that a central cavity 36 is formed by the aligned openings 24a. The hollow rivet 28 with the ignition charge 32 is arranged in the cavity 36. The flame of the ignition charge 32 ignites the subbodies 24, burns through the cavity 36 to the lid 26 of the bombette 14, and there ignites a reflective ignition device 38, preferably in the form of a reflective gauze disc 38, thus igniting the subbodies 24 located near the lid. The reflective ignition device 38 ensures reflection of the ignition flame. In a preferred embodiment, the reflective gauze disc 38 is impregnated with black powder lacquer, which ensures effective reflection and return of the ignition flame, thereby increasing the reliability of the ignition.

[0035] Figures 3 to 6 clearly show that six flame recirculation channels 24b, spaced equally around their circumferences, are formed on the circumferential surface of the subbody 24.

[0036] The subbodies 24 are identical in construction and their central openings 24a are aligned with each other. The central openings 24a form the central cavity 36, within which the ignition takes place.

[0037] The central opening 24a of the subbody 24 is oval in shape, wherein the central opening 24a of the subbody 24 is designed in such a way that only two symmetry positions are possible, which ensure the aligned alignment of the flame return passages 24b of all subbody 24.

[0038] Upon ignition, the flame is transported upwards through the cavity or central opening, where it is reflected by the reflective igniter 38, in particular the reflective gauze disc 38. The flame is then returned via the outer flame return channels 24b, as indicated by arrows P in Fig. 1. This results in more effective ignition of the subbodies 24 at their outer circumferential surface than in the prior art. When the flame returns through the flame return channels 24b, the ejection charge 34 at the base 22a of the bombette 14 is activated, causing the ejection of the subbodies 24. The return of the ignition flame via the outer return channels 24b achieves a double ignition, which increases the reliability of the ignition. Furthermore, the interaction with the ejection charge 34 ensures a controlled and reliable ejection of the subbodies 24.

[0039] In a preferred embodiment, a further gauze disc 42 is arranged on the ejection charge 34, which is ultimately ignited shortly before the ejection of the subbodies. Reference numeral list:

[0040] 10 irritant cartridges

[0041] 12 sleeve

[0042] 14 Bombette

[0043] 16 propellant charge

[0044] 18 lids for 12

[0045] 20 firelighters

[0046] 22 cases

[0047] 22a Floor or lower end wall of 22

[0048] 24 subbodies

[0049] 24a central opening

[0050] 24b Flame Recirculation Passages

[0051] 26 lids for 22

[0052] 28 Ignition tube or hollow rivet

[0053] 30 Delay charging

[0054] 32 ignition charges

[0055] 34 ejection charge

[0056] 36 cavity

[0057] 38 Reflective ignition device / Reflective gauze disc 40 Sealing

[0058] 42 gauze disc

[0059] P Arrow / Flame Path

Claims

Patent claims:

1. Bombette (14), in particular for an irritant cartridge (10), comprising a casing (22) and a plurality of subbodies (24), wherein: • the subbodies (24) are arranged one above the other inside the housing (22), • the outer circumference of the subbody (24) is adapted to the inner circumference of the housing (22), • the subbodies (24) have a central opening (24a) for ignition, characterized in that • a reflective ignition device (38), in particular a reflective gauze disc (38), is arranged on a cover (26) of the housing (22), wherein the reflective ignition device (38) ensures a reflection of the pilot flame, • wherein flame recirculation channels (24b) are formed on the circumferential surface of the subbody (24).

2. Bombette according to claim 1, characterized in that the central opening (24a) of the subbody (24) is designed in such a way as to allow a limited number of symmetry positions which ensure the alignment of the flame return passages (24b).

3. Bombette according to claim 1 or 2, characterized in that the central opening (24a) of the subbody (24) is oval in shape.

4. Bombette according to one of the preceding claims, characterized in that the number of flame recirculation passes (24b) is between 3 and 10.

5. Bombette according to any one of the preceding claims, characterized in that the number of flame recirculation channels (24b) is an even number.

6. Bombette according to any one of the preceding claims, characterized in that the flame recirculation channels (24b) are spaced uniformly around their circumference.

7. Bombette according to one of the preceding claims, characterized in that the subbodies (24) have been produced by a pressing process.

8. Bombette according to one of the preceding claims, characterized in that the subbodies (24) are provided with a coating, wherein the coating comprises an ignition layer.

9. Bombette according to one of the preceding claims, characterized in that the reflective gauze disc (38) is impregnated with a black powder lacquer which ensures the reflection of the pilot flame.

10. Bombette according to one of the preceding claims, characterized in that the number of subbodies (24) is between 4 and 8.

11. Bombette according to one of the preceding claims, characterized in that the subbodies (24) contain an irritant.

12. Irritant cartridge (10) with a bombette according to claim 11.

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