Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
  • F42C19/00—Details of fuzes
  • F42C19/06—Electric contact parts specially adapted for use with electric fuzes

Definitions

• Switching device for influencing the function of electrical ignition systems, in particular ammunition ignition systems
• the invention relates to a switching device for influencing the function of electrical ignition systems, in particular ammunition ignition systems in a projectile or a missile.
• switching devices which are used in particular to set the delay time which is to elapse between the triggering of the ignition device and the time at which the charge is ignited, are known.
• DT-OS 1 933 377 and to CH-PS 581 822 the latter of which describes an electrical ignition device with a time delay in hand grenades.
• the delay time was generated by actuating mechanical devices from the outside.
• the projectile body had, for example, a rotatable ring or similar elements which forwarded the switching command to the delay circuit through an opening or a hole in the projectile body.
• the switching device has at least one movable element which, under the influence of gravity as a function of the angular position in the axial direction of the projectile or the missile when launched, different possible positions relative to the projectile without external intervention. or occupies rocket bodies and determines the function of the ignition system during the launch acceleration.
• FIG. 1 shows a projectile with the device according to the invention in a first firing position
• Fig. 2 shows the same floor in a second Ge
• FIG. 3 shows a schematic sectional view along a plane perpendicular to the projectile axis through the device according to the invention in a first firing position
• Fig. 4 shows the same section in a second launch position
• 5 shows a schematic sectional view along a plane lying in the axis of the projectile through the device according to the invention in a first firing position
• FIG. 7 shows a schematic illustration of the switching device according to the invention on an electrical ignition system
• FIG. 8 shows a sectional view of an exemplary embodiment of the switching device according to the invention before firing
• FIG. 10 shows a sectional view of another embodiment of the switching device before firing
• FIG. 12 shows a sectional view of a third exemplary embodiment of the switching device according to the invention, before firing
• Fig. 13 is a sectional view of the same switching device after firing
• FIG. 14 shows a schematic sectional view along a plane perpendicular to the projectile axis through an embodiment of the invention, in which one can choose between three switching states.
• the ignition device of which is triggered by the impact on a target object, it is advantageous to provide delayed ignition in addition to the instantaneous ignition of the load. This is because the
• Goals - e.g. Armored vehicles - are often provided with panels, the purpose of which is to get the projectiles to fire at the actual target before they appear, thus weakening their effect. This can be prevented by igniting the charge with a certain time delay compared to the time of impact. During the instantaneous ignition, the time between the triggering of the ignition device and the ignition is of the order of 10 to 20
• Microseconds it is extended to approximately 1 millisecond if the ignition is delayed.
• the shooter After the target has been observed, the shooter has to decide which function of the ignition system is suitable for the target and must then adjust the projectile accordingly in the shortest possible time. In the present invention, this is done in that the shooter shoots 1, as in FIGS. 1 and
• a marked stabilizing wing 2 of the projectile 1 points upwards.
• a cavity 4 in the form of a sector of a circle is in the position shown in FIG. 3 in the region of the ice of the sector and at the entrance of the channel 6 which opens there and contains a switch 7. If the projectile is fired in the direction of the arrow (cf. FIGS. 7 to 13 /, the inertial force of the ball 5 triggers the switch 7, as a result of which a delay circuit 8 (FIG. 7) in the electrical ignition circuit 9 is put into operation.
• the ignition circuit 9 can thereby be constructed in a conventional manner known to the person skilled in the art, similar to that shown in CH-PS 581 822.
• An ignition capacitor 10 is triggered at the moment of firing by a known ignition current generator (not shown), such as that described in CH-PS 586 384.
• a target switch 11 closes. If the delay circuit 8 is activated, as shown in FIG 8 determined time delay the discharge of the capacitor 10 via a primer 12, which causes the detonation of the main charge of the projectile
• Ball 5 on the periphery of the circular sector.
• the ball lies, as shown schematically in FIGS. 4 and 6, on the side of the cavity 4 facing away from the channel 6 and therefore does not come into contact with the switch 7. This switch remains unactuated, and the Delay circuit does not work.
• the switching device can be used in a wide range of possible elevation angles. Since the acceleration direction during firing coincides with the axial direction of the projectile, no forces act on the bullet 5 that would be suitable for displacing it from its position in the cavity 4, even when firing under elevation in the firing phase. The acceleration and gravitational forces acting during the flight, should the ball also shift during the flight phase, should not be able to trigger the switch 7, since this only occurs when a certain minimum acceleration occurs, as is typical for the launch phase is actuatable. The large negative acceleration occurring in the event of an impact exerts a force on the ball 5 that is directed away from the switch 7, so that even in this phase it is no longer possible to change the type of function of the ignition device that was established during the firing. This is especially true for projectiles or missiles that rotate around their axis during their flight. Since at least in - 6 -
• the first part of the firing phase during which the function type of the ignition device is determined, the self-rotating forces on the ball 5 are negligible, but later the function can no longer be influenced, the switching device also ensures that it functions properly on such projectiles.
• FIGS. 8 and 9 show such a switch 7 in its two possible positions, the mode of operation of which is based on the severing of an electrical line 14.
• the electrical line leads through a body 15, which is fitted into the channel 6.
• the strength of the line 14 is selected such that it is sheared off under the influence of the force which the ball 7 exerts during the firing, in that the body 15 moves out of its initial position (FIG. 9). If this force is missing because the ball 5 is not in the area of the switch, the line 14 remains intact and the first switching state is thus maintained. As one can easily see, this is the case when the projectile is shot in the position shown in FIGS. 2, 4 and 6.
• FIGS. 10 and 11 Another embodiment of the switch 7 is shown in FIGS. 10 and 11.
• the delay circuit 8 is preferably constructed in such a way that it is activated even with a single short-term contact, regardless of a possible interruption of the contact. Characterized that a displacement of the ball 5 zwi ⁇ rule ensures te the contacts 17,18 and consequent poor 'or interrupted connection the function of the device Weg ⁇ not impaired.
• FIGS. 12 and 13 a further embodiment of the switch 7 is shown in FIGS. 12 and 13.
• the obstacle is formed by elastically deformable tabs 19 attached to the channel entrance and directed away therefrom. These tabs perform two functions simultaneously. First of all, they form an obstacle that can only be overcome by the ball 5 when a certain minimum acceleration occurs, by elastically deforming the tabs against the channel walls. If the ball has overcome the obstacle, the tabs 19 spread, hold the ball 5 trapped between the contacts 17, 18 and exert a certain force on the ball with which it is pressed between the contacts.
• the invention is not limited to the setting of different ignition delay times, but rather any definition of functions of a projectile or one desired during the firing
• Rocket is possible with it.
• FIG. 14 a cross section through the switching device 3 perpendicular to the projectile axis is shown. Other views have not been shown, since the further configuration can easily be gathered from the above description.
• the projectile is attached to the launching device in one of three possible axial angular positions. As a result, a specific one of the three balls 5 is brought into the activated position and actuates a switch (not shown) when it is fired, as a result of which one of three modes of operation is defined, as has been described in detail above.
• the device according to the invention has the advantage over the known devices that the type of operation of the projectile or the missile is determined without any intervention in the interior. This makes it possible to completely isolate the switching device from external influences, as a result of which the same presupposable functional conditions prevail under all weather and operating conditions.
• the operation of the device is also extremely simple and perfectly possible even under difficult conditions.
• the construction of the switching device is simple, since no seals and mutually movable "outer" parts are necessary, and is suitable for cost-effective series production.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4245594

Family Applications (1)

Country Status (2)

Cited By (2)

Citations (5)

• 1978
  • 1978-03-17 CH CH296478A patent/CH620765A5/de not_active IP Right Cessation
• 1979
  • 1979-03-19 WO PCT/CH1979/000043 patent/WO1979000792A1/de unknown

Patent Citations (5)

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