DE2355221A1 - Electrical safety unit for munitions fuse - has removable safety units connecting opposed branches of electrical circuit - Google Patents

Abstract

Electrical safety unit for a tubular fuse for artillery rounds or explosives has a tube with mutually insulated conductive parts and in opposed branches of an ignition circuit, between whose inner ends are igniters for the fuse. Removable safety units can bring the circuit branches into electrical contact. Pref. the units are formed by masses and bodies in a stable position in connection with the two branches and held there elastically and frictionally, and can be removed from this position by a preset inertial effect to interrupt the contact, in the direction toward the electrical apparatus. Complete electrical security is ensured during transport of the grenades.

Description

PATENT ADVERTISERS 235522 T

DR.-ING. KARL BOESiMERT. 2HP 1.-ING. ALBERT BOEHMERT DR.-ING. WALTER HOO ^ MANN. PIPL-PHYS.Sr. HEIWl GODDAR

BREMEN FELDSTRASSE 24. TELEPHONE (0431) »74044 · TELEX 244958 bopaf d File number: Ueuanmeldiing. ftwfidiedtkonto, Hamburg 1260 83

'- Bank account ι Brem.r Bank, Bremen,

Named Anrti η ' -tr rt _ ■ _ Κοηίο 1001449 (BU 290 80010)

Name d. Note: Gianni Verga Casati

Our reference: C 60J 28 Bremen, November 3rd 1973

Gianni Verga Gasati, Via degli Olivetani, 8, Milan (Italy)

Safety device for electrical ignition devices for grenades, in particular for artillery cartridges

The invention "relates to an electrical safety device as part of a tube ignition device for the electrical ignition of projectiles or Explosives, with a tube which is electrically conductive Has metal parts that are mutually insulated and. which lie in the opposite branches ■ of an ignition circuit, between their inner ones Ends arranged ignition means for the ignition device are. ·

The invention is based on the object of providing a safety device for tube ignition devices electrical ignition in guns or the like to create through which a complete electrical safety when handling. with and when transporting the

410

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Grenades or the like is guaranteed, with rapid, preferably automatic unlocking should be possible.

According to the invention, this object is thereby achieved in a device of the type mentioned according to the invention solved, -that removable securing means are provided, which the opposing branches' of the ignition circuit can bring them into electrical contact. The new device makes it an absolute Security against undesired electrical ignitions guaranteed. ! The following effects will be absolutely excluded: the introduction of direct or induced currents into the ignition circuit, the accumulation an electric charge as a result of moving electric fields or static electricity, as well as the conversion of energy or radiation generated by electromagnetic fields into corresponding electrical voltages causing ignition.

This absolute security against electrical effects makes it possible to carry out all necessary operations, which are necessary before the use of artillery shells or the like, such as storage, loading and the like, to be carried out safely and safely. Takes place at the moment of shooting Immediately release the fuse, with the insulation between the two temporarily connected for security Branches of the ignition circuit is restored. In this way, the ignition circuit can be ignited again if

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it is traversed by current caused by the application the "two branches of the ignition circuit is generated by means of a voltage.

An ignition device of the type according to the invention, which has the safety device according to the invention, is suitable for use with all types of bullets or explosives, but especially for the casing of artillery projectiles. The following Description "refers to this intended use the invention. - ..... ......, .......

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Further features and advantages of the invention emerge from the claims and from the following Description in the various embodiments the safety device according to the invention based on the drawing are explained in detail. It shows:

Pig. 1 is a schematic demonstration sketch showing a first embodiment of the invention, in which the application the safety device is done by hand and the safety device itself works mechanically;

Prop. 2 in axial section with an electrical Safety device equipped cartridge tube, whereby the safety device takes place mechanically or by means of an accelerator drive;

Prop. 3 another embodiment of the invention Security facility where this is attached to the cartridge tube shown in Figure 2;

3a shows a section along the line IHa-IIIa of S ¹ Ig-. 3>

Fig. 4 shows another embodiment of the invention Contraption;

5 shows a part of a cartridge tube in axial section with an electrical safety device that is mechanically operated and moved dynamically;

6 shows, in axial section, part of a sleeve or cartridge tube with an electrical one Safety device with mechanical operation and combined dynamic and Acceleration actuation;

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Fig. 6a shows a modified detail of the Pig. 6th embodiment shown;

Pig. 7 shows a modified embodiment

the device according to the invention on which in Fig.;. 6. Assembled cartridge tube shown; - "" - ■■■ ..-. . "..." ■■

8 shows a further embodiment of the device according to the invention; ■■. . \;.

9 shows part of a cartridge ear in axial section with an electrical safety device with electrical operation;

Fig. 10 in axial section a part of a sleeve or Cartridge tube with an electrical safety device with magnetiscliem Operation·. . ; ■ "

The invention is shown in Fig. 1 on the basis of a schematic Embodiment shown in which it is. an extremely simple solution, which is used in cartridges for artillery shells, which require direct, manual intervention is. While this solution appears to be the least technically perfect, it has the merit of simplicity and the possibility of immediate use with any type of cartridge with an electric ignition tube, without the ear having to be replaced by one which performs in accordance with the teaching of the invention were. On the other hand, all have loading below. written execution examples the advantage of the automatic operation and are for the cartridges of business

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protect with mechanical cartridge control suitable.

In Fig. 1 there is a case 1 of an artillery cartridge shown, which is provided with an electric ignition tube, of which a head 2 is visible. It is well known that when a shot is fired, there is a schema. through the Arrow P shown voltage is applied between the sleeve (ground) and the head, the latter being expedient is attached isolated. in order to "apply" electrical current to an ignition means A as a trigger. The case is therefore in an ignition circuit that ..........

contains two branches, which are formed from mutually isolated parts, namely sleeve and head, as well as ignition means of any kind, for example dui ^ ch resistance, by spark, by conduction, by induction, which are connected to the inner ends of the branches. This sin circuit is energized when the gun is fired, whereby it is of course necessary to avoid that this voltage is applied at any other moment, since otherwise severe damage or losses could be caused. As already mentioned, this is achieved according to the invention in that the branches of the ignition circuit, ie the case 1 and the head 2, are brought into direct contact, the possibility of this contact being made when the cartridge or cartridge is inserted into the gun or to easily interrupt the weapon. In the embodiment shown, this is done in an extremely simple manner in that a metallic cover 3 is placed on the bottom of the cartridge sleeve.

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is set, on the one hand with the sleeve and on the other. On the one hand, you can establish effective contact with your head. For this purpose, the cover 3 is made elastic and made of a highly conductive material. The lid 3 has an elastically deformable edge 4 ·, .the can be anchored stably at the edge 1 ¹ of the bottom of the sleeve 1 and a central buckle 5 of limited extension, which supports the head 2 elastically. "

To increase safety, a second, intermediate, annular bulge 6 is provided, which ...,

sits elastically on the bottom of the sleeve 1. The lid excludes any direct or indirect electrical path that could trigger a cartridge ignition would give, so that the cartridge handled, stored for this reason with the greatest possible safety and can be transported. Before commissioning is it is necessary to remove the elastic cover 3 to restore the ignitability * whereupon the cartridge is ready to fire again. ·

In Fig. 2 an automatically operating embodiment of the invention is shown. An ignition device 12, which is mounted in the interior of the cartridge case, has a head 11 and a head opposite this Head isolated by cylindrical insulating elements 14, 15 Head 13, with a double diameter reduction being provided on the bottom part, which, between a gate 16 of the head base 11, the Insulation and the head 13 itself an annular,

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stepped recess 17 creates. In this ring-shaped The insulating element provided at the end of the head and a cylindrical metal ring 18 are located in the recess, which sits between insulating elements 1A and 15. Of the Metal ring 18 stands with the projection 16 of the head of the ignition device and with the head 13 in Contact. One or more elastic blocks 19, each consisting of a ball 20 and a spring 21 ″, are located in a transverse cavity 22 of the head 13 » the bead 20 protruding from this cavity. As a result of this construction, the metal ring 18 is the Contact between the two branches of the ignition circuit, which also in this case by the head 13 and the sleeve are formed, the latter in direct. Contact with the head 11 of the device is. In this way, absolute electrical safety remains the cartridge or cartridge guaranteed. As soon as these are used for loading in the gun or the like causes the shock due to the inertia of the hanging, the sudden stop of the ring 18 is caused when the cartridge with a certain energy and speed in the barrel of the gun has been deployed and suddenly stops that the resistance of the elastic Latch 19 is overcome so that the ring 18 is opposite the innermost part of the ignition device 12 offset so that it loses contact with the head 11 of the device. In this position the Metal ring 18 stopped by the blocking ball 20, which is provided with cavities for this purpose uses, which are provided inside the ring 18,

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- 9 - '■■' ■ ·

whereby the regular operation of the ignition circuit is enabled.

Fig. 3 shows another embodiment of the ignition device according to the invention with electrical Safety device that works on the principle of the same accelerator drive system as in Fig. 2 shown device. In a head 51 of the Device a head 32 is provided, which completely insulated by an insulating cladding 33

is. The head 32 is hollow inside. (34) ". And ....,

contains a metal ball 35. Both the head 31 and The insulating cladding 33 and the side wall of the head 32 also have three radially extending ones Openings that are the same angular distance to have. The metallic shafts 36 of spring pistons 37 extend through the openings of the head 31 are arranged and into the cavity 34 of the head protrude. The ends of the shafts 36 are beveled inside the head as shown at 38 so that they are in direct contact with the metal ball 35 reach, on which they act elastically and hold them at the bottom of the head. The ends themselves have an insulating on the other side of the slope 38 Material 39 as a cladding.

In the secured state, the safety device, as shown in FIG. 3, lies between the two branches of the ignition circuit, namely between the head 31 eggs Ignition device and the head 32, the connection between the branches by the spring piston 37 »

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whose shafts 36 and the ball 35 is made. If the cartridge is inserted into the barrel when the shot is fired, the shock causes it to occur when the shot is terminated the insertion movement occurs, due to the inertia of a force acting on the ball 35, which it does allows to overcome the resistance of the shafts 36: These return elastically to their seat, with the ball opposite that of the cavity that was originally occupied Part of the head cavity 34 occupied. Then sweep the shafts. 36 back in theirs

inner position and thus prevent · Anything

Return the ball to its original (safety) Position. In view of the insulating material 39, the ignition circuit can be regular, for ignition ur-d for the shot can be put into operation.

Another example, from the point of view only The device structure seen is illustrated in Fig. 4-, the ball 35 being supported by a piston 35 'replaces is.t, the shaft 35 "in an insulating Sleeve 35 '' 'and with the head 32', located in a special seat, is in contact. The shafts 36 and the pistons 37 in turn are replaced by one or more spring pistons 37 *, whereby allows the insertion of the hollow piston rim 35 ' will. This gate direction works in practically the same way as the previously described embodiment.

Another safety device, designed as

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Exemplary game according to the invention is shown in Fig. Shown * Here a head 4-1 faces the ignition device a head 42, which by means of a needle

44 made of conductive material, preferably metal, is inserted into special openings in the head 41. Between an inner end 43 of the head 42 and A certain amount of play G is present in the bottom of a cavity provided for this purpose. An insulating element

45 41 separates the head from the head of the device Another annular insulating element 47 'is located immediately adjacent the needle 44 at the edge of -Köpf r - · ■■■ Chen 42nd

The operation of this device takes place through a dynamic effect, by a certain external force If applied against the head 42. This pushes it forward and breaks it apart Leaflet or needle 44, wherein, the movement of the Head together with the leaf part, which is on full length of the intended game G is separated, continues. That way the connection becomes between the cartridge case and the head 42, 43 through the head 41 of the device and the leaflet 44 interrupted by the insulating element 47, which changes the state from safety to fire readiness the cartridge passes. The force E is preferred delivered from the firing pin of the weapon »

In the embodiment shown in Fig. 6, which both dynamically and as a result of the exerted

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Acceleration can work, a bottom 52 is provided in a coupled head, which opposite a head body 531 in a head of the ignition device is used, can perform a forced movement. An insulating element 54 separates the head 51 both from the body 53 and from the bottom 52, the bottom 52 of the head has a deep outside Annular groove 55, which is clad with insulation 56 is. The head 51 in turn has one or more Radially arranged holes in which spring-loaded metal balls 57 sit. .

In Pig. 6a, the balls 57 are replaced by small cylindrical bodies, which perform the same function.

If the cartridge is in the described condition, the existing connection between the head 51 and the head body 53 thus guarantees > Which by the balls 57 or by the Met all cylinder 58 imd the head base 52 is ensured, the fuse against electrical influences. This safety state is terminated when the cartridge enters the barrel of the gun or the like is introduced, whereby by the sudden stop of the cartridge itself or but by applying an external force F, as desired and possible, the bottom of the head 52 on the body of the head 53 "with which it is coupled, slides until the isolated annular groove 55 lies opposite the ball 57. The described Security connection dissolved, so that the

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electrical ignition necessary ignition circuit is established. "■" .- ■■ "■ '-. ■ .-.' - ■" ■ - ■■■ -'- '] -', /: --_ ':'", . ■. ■■■

An exemplary embodiment of this system is shown in FIG. 7 shown, where, the .Köpf chen62 inside the Head 61 of the ignition device lies. The security device has a button.63, which is Inside a bore 64 of the head lies and on its outer end at the level of the bottom of the head

61 aligns. The button is through with the head

a strong spiral spring 65 as well as with the inside of the --- ■ head base connected by a splash 66. An insulating element 67 separates the button 63 from the head 61 while Another insulating element 68, the head 62Vom Head 61 separates. In this an inner ring groove is provided in which an annular spring 70 is located in Height of the flange 66 of the head sits and the end of the insulating element 68 separates from it. When applied an external force F on the outer surface of the button 63 the latter overcomes the resistance exerted by the spring 65 and moves forward, so that the flange 66 is removed from the head 61. In this Position becomes the previously guaranteed security for the connection between the head 61 and the head

62 interrupted by parts 66, 63, 65, so that the cartridge is ready to fire. The spring 66 cannot push the button back to its original position, since the flange 66 has moved away from the head bottom and the annular spring 70 has narrowed, whereby the end part of the insulating member 68 is deformed so that that a return is no longer possible. This gate *

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direction cannot only be given directly by an external force, but also by the acceleration effect that occurs when a cartridge is put into operation after being inserted into a gun barrel or the like after being dropped, suffers a holding shock.

Another embodiment of the invention is shown in FIG. Essentially the same elements are present as in the exemplary embodiment described above, changed in a corresponding manner with regard to their shape and with regard to their dimensions, with the exception of a restraint system of the button 63 'in the unlocked state. In this restraint system, instead of the ring spring 70 © in spherical body 7I, the head 62 ^! protrudes. The spherical body 71 is connected to the head 62 * via a constriction 72. At the end of a recess 74 of the head 63 ', two elastic rods. 73 are arranged. If the button 63 * changes from the explained safety state to the unlocked state, in that it is pushed through the head by an external force or force, the two elastic rods 73 slide past the spherical body 7I and get stuck in the constriction 72, thus preventing any return to the secured position.

In turn, the principle of action is completely different the one in Pig. 9 embodiment shown, but also taking into account the inventive concept is executed. Here, a head 82 is hollow and includes an electromagnet 84

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-. 15 ■ - '■ - -: ■. ■ .i. ■ ■■■ ".- ■■ ·

an anchor 85. The head 82, containing these components, is drawn into the head 81 and from this separated by an insulating element 85. The anchor 85 stands over elastic rods 87, which are in a recess 85 'of the head 81 sit, with the head 82 and a conductor 86, which from the head 81 through the Isolierele-r ments 85 running, in connection * The poles of the electromagnet are connected in such a way that one pole, 84- ', with * · ■■ -.- dem Head 82 and the other, 84 ", with anchor 85 communicates .. When the anchor 85 with the conductor 86 is connected, the head 81 and the head 82 to each other by the electromagnet 84- electrically tied together.

If now after the cartridge in the gun barrel has been set, the Geaaste is used by a Firing pin 88 acts on the head and the firing circuit "is put under voltage", a current first runs in the short circuit through the coil of the electromagnet 84, whereby the armature 85 is attracted the backup is removed by making the Short circuit interrupted and the current through the ignition means is conducted in the ignition circuit. .

-A safety device with magnetic actuation according to the invention is shown in FIG. In a head of the type shown in Fig. 9 is a -small permanent magnet 93 arranged, which by. Friction is held and the connection between a head 92 and a head 91 of the ignition device manufactures. The backup can be canceled

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be by adding the bottom of the bowl 92 a suitable "ferromagnetic body is approximated, in particular the firing pin of the gun.

It goes without saying that the invention is also implemented in various modifications and structural configurations can be, with modifications and configurations familiar to the person skilled in the art, all of which are within the scope of the invention. '

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Claims (7)

A η sp "r ü e h e Electrical security equipment as part of a Tube ignition device for electrical ignition - .; ■ ··: " of projectiles or explosives, with a tube which has electrically conductive metal parts that. are mutually isolated and those in each other opposite branches ^ of an ignition circuit lie, between their inner ends · ignition means for the Ignition device are arranged, thereby marked * draws that removable securing means are provided, which the opposing branches bring the ignition circuit into electrical contact, 2. Safety device according to claim 1, characterized characterized in that the securing means are formed by masses and bodies that are in a stable Position in connection with the two branches Ignition circuit stand and are held in this position elastically and by frictional connection, the Safety means can be removed from the safety position as a result of a previously determinable inertia effect in order to interrupt contact in the direction on the electrical equipment. . 509819/02 3. Safety device according to claim 1, characterized characterized in that the securing means of masses and bodies "consist of elastic holding means are held in a stable position in connection with the branches of the control circuit and through strong friction clutch can be removed from this position, whereby the contact by influence of external forces acting on the cartridge or the like can be canceled. 4. Safety device according to claim. % .by .. ....... characterized in that the security means from one in a stable position by elastic holding means bodies kept in contact with the branches of the circle of fire, which by means of an electromagnet, which is put into operation by an electrical voltage, from its safety position are removable, whereby the ignition circuit is activated. 5. Safety device according to claim 1, characterized in that the safety means consists of one Permanent magnets - exist that are in a stable position with the branches of the circle of fire through elastic Holding means is held in connection and by bringing a ferromagnetic body to the Cartridge or the like can be removed from the secured position. 6. Safety device according to claim 1, characterized in that the safety means consists of one 509819/0223 ■ <■■■. . - 3 - ·:. ; ". .- · ■■■■ -is.." - ■ metallic conductive element "exist, which is elastically attached to the cartridge or the like and quickly removed from it by manual intervention can be, this element making effective contact with the. both branches of the fire circle . 7. Safety device according to claim Ί or according to ' one of claims 2 to 5, characterized in that that the parts forming the mutually opposite branches of the ignition circuit are the head of the ignition device, in contact with the sleeve, or the cartridge sleeve itself as well as the head of the ignition device of the cartridge are »