Bullet hit squib and method for manufacturing

Abstract

Provided is a bullet hit squib including: an electrical connection line; a glow wire connected to the electrical connection line; and a primary explosive charge by which an active substance is formed which can be ignited by the glow wire. The primary explosive charge is formed by a primary explosive which is free of heavy metals and contains silver azide. A method for producing a bullet hit squib is also provided.

Claims

1. A bullet hit squib, comprising: an electrical connection line; a glow wire which is connected to the electrical connection line; and a primary explosive charge, which, when dried, results in an active substance that can be ignited by the glow wire; a carrier having a receptacle for the glow wire and the primary explosive charge, wherein carrier portions of the carrier which are in contact with the primary explosive charge are made, at least in portions, of a material that absorbs moisture from the primary explosive charge; wherein the primary explosive charge includes a main primary explosive charge which is formed by a primary explosive containing silver azide and is free of an initial primary explosive charge.

2. The bullet hit squib according to claim 1, wherein the primary explosive charge consists of the primary explosive containing silver azide.

3. The bullet hit squib according to claim 1, wherein the primary explosive consists of silver azide.

4. The bullet hit squib according to claim 1, wherein the glow wire has an anti-corrosion coating at least in the region of a wire portion which is in contact with the primary explosive charge.

5. The bullet hit squib according to claim 4, wherein the anti-corrosion coating is formed by an adhesive which is applied to the glow wire in the region of the wire portion.

6. A method for producing a bullet hit squib, comprising: providing an electrical connection line; connecting a glow wire to the electrical connection line; and charging with a primary explosive charge which, when dried, results in an active substance that can be ignited by the glow wire; wherein the primary explosive charge includes a main primary explosive charge which is formed by a primary explosive containing silver azide and is free of an initial primary explosive charge; wherein a receptacle of a carrier which receives the glow wire is charged with the primary explosive charge and wherein carrier portions of the carrier which come into contact with the primary explosive charge during charging absorb moisture from the primary explosive charge.

7. The method according to claim 6, wherein the primary explosive charge is applied as a moist material, and the moist material is then dried resulting in the active sub stance.

8. The method according to claim 7, wherein the carrier portions contribute to drying of the moist material.

9. The method according to claim 6, wherein an anti-corrosion coating is applied to the glow wire at least in a region of a portion of the glow wire which comes into contact with the primary explosive charge before charging.

10. The method according to claim 6, wherein a receptacle of a carrier which receives the glow wire is charged with the primary explosive charge.

Description

BRIEF DESCRIPTION

(1) Some of the embodiments will be described in detail, with references to the following Figures, wherein like designations denote like members, wherein:

(2) FIG. 1 shows a schematic illustration of a bullet hit squib, in which a carrier is designed so as to have a ring; and

(3) FIG. 2 shows a schematic illustration of another bullet hit squib, in which a carrier is formed so as to have a sleeve.

DETAILED DESCRIPTION

(4) FIG. 1 shows a schematic illustration of a bullet hit squib 1, in which a ring 2 forms a carrier on which a primary explosive charge 3 forming an active substance is arranged. The primary explosive charge 3 also surrounds a glow wire 4 which, in the region of contact points 5, is connected to connecting wires 6 which are twisted in a central portion and have separated ends 7. In a portion 8 of the ring 2, an adhesive connection is made between the connecting wires 6 and the ring 2.

(5) An electrical voltage can be supplied via the separated ends 7 in order to cause the glow wire 4 to glow, such that the primary explosive charge 3 of the bullet hit squib 1 is ignited.

(6) In order to simplify the illustration, a cover which can grip the ring 2 and the primary explosive charge 3 together with the glow wire 4 accommodated therein, is not shown in FIG. 1. The ring 2 and the cover (not shown) can consist of a material which absorbs moisture from the primary explosive charge 3 and releases it to the outside, for example a paper or cardboard material. This makes it possible first of all to apply the primary explosive charge 3 as a moist material, optionally to press it in, and then to dry it for activation, this drying process being promoted by the material carrying moisture away from the primary explosive charge 3. The various embodiments can be dried in air and/or in a drying oven.

(7) FIG. 2 shows a schematic illustration of a further bullet hit squib 10, in which a sleeve 11 forms a carrier in which the primary explosive charge 3 together with the glow wire 4 embedded therein is arranged. The same reference numerals as in FIG. 1 are used in FIG. 2 for the same features.

(8) The glow wire 4 is connected via the contact points 5 to the connecting lines 6, the separated ends 7 of which serve for connection to electrical power. Furthermore, in the embodiment in FIG. 2, an insulating plug 12 is provided, which is also arranged in the cylindrical sleeve 11. The connecting lines 6 run through the insulating plug 12.

(9) The sleeve 11 is made of a material by which moisture can be absorbed from the primary explosive charge 3 and dissipated to the outside, which assists the drying of the primary explosive charge 3 after application as a moist material. For example, the sleeve 11 can consist of a cardboard or paper material.

(10) The further bullet hit squib in FIG. 2 also has a cover 13, which can also be made of the moisture-dissipating material.

(11) The different embodiments of the bullet hit squib 1, 10 have the common feature that the primary explosive charge 3 forming the active substance contains silver azide. Sodium azide (NaN.sub.3) and silver nitrate (AgNO.sub.3) can be used as raw materials for the production of silver azide, for example by dissolving the raw materials in water. By using a precipitation reaction, a moist primary explosive is produced which is inactive in the water. The silver azide can then be filtered out, as a result of which a moist material is provided which can be applied to the corresponding carrier of the bullet hit squib 1, 10. This is followed by drying in order to activate the primary explosive.

(12) During production of the particular bullet hit squib 1, 10, before the application of the primary explosive charge 3 (for example as a moist material) the glow wire 4 can be provided with an anti-corrosion coating at least in portions, in order thus to prevent the glow wire 4 from corroding and in this way to maintain the functionality of the bullet hit squib 1, 10 even after prolonged storage. In one embodiment, the anti-corrosion coating can be formed by an adhesive material, for example paste or glue, which is then also used for the adhesive connection of other components of the bullet hit squib 1, 10, for example the cover 13 being glued on.

(13) Although the invention has been illustrated and described in greater detail with reference to the preferred exemplary embodiment, the invention is not limited to the examples disclosed, and further variations can be inferred by a person skilled in the art, without departing from the scope of protection of the invention.

(14) For the sake of clarity, it is to be understood that the use of “a” or “an” throughout this application does not exclude a plurality, and “comprising” does not exclude other steps or elements.