Ammunition and explosives – Drop bombs – Rebounding or multiple bursting charges
Patent
1998-08-03
2000-06-27
Carone, Michael J.
Ammunition and explosives
Drop bombs
Rebounding or multiple bursting charges
102404, 102373, 102382, F42B 2500
Patent
active
060793341
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a shell for trench mortars and a similar firing system, whereby the shell includes an effective portion, which can be fired from a barrel by a propellant charge, there being a pressure plate interposed between the propellant charge and the effective portion, which pressure plate carries the influence from the propellant charge.
BACKGROUND OF THE INVENTION
A shell of this type is previously known and described in SE 9501309-0.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a shell, which explodes and delivers its effective fire in the air instead of at ground impact as previously is known. The shell can easily be reshaped into an inexpensive training shell, which is extraordinarily safe. Further, as the pressure from the propellant charge, which shoots the shell out from the barrel, is not carried by the shell itself but by the pressure plate, it is possible to use less sophisticated and cheaper material in the shell itself, which is particularly applicable to training shells.
The invention will be described schematically below on one hand and a specific embodiment thereof on the other hand.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows schematically the principle of the invention with a shell inside a barrel immediately after the firing.
FIG. 2 shows schematically the shell after impact with the ground.
FIG. 3 shows schematically a portion of the shell in the ground after the effective component has been shot away.
FIG. 4 shows the effective component being free from the carrier component.
FIG. 5 shows an imaginary cross section of a preferred embodiment according to the invention of a shell, which is in safety secured state.
FIG. 6 is a longitudinal section of the shell according to FIG. 5 in the unsecured state after having been shot out from the barrel.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1 there is shown a barrel 1 of a trench mortar. The shell generally designated 2 is in the barrel together with the pressure plate 3. In the imaginary position shown, the pressure plate 3 has been released from the shell 2. The pressure plate 3 includes a propellant charge 4, which is located below the pressure plate and is initiated by a detonator 5. The detonator can be fired by means of a striking pin (not shown) in the bottom of the barrel. When the mortar is being loaded, the pressure plate 3 is attached to the shell 2 by a sleeve 6 of the pressure plate surrounding a stud 7 attached to the shell, the sleeve being provided with an aperture, through which a pin 8 is inserted and extends into an aperture in the stud 7. When the propellant charge 4 explodes, a portion of the gas pressure is directed through an aperture 9 to a central aperture in the stud 7, which central aperture is communicating with said aperture, through which the pin 8 is inserted, and this pressure pushes out the pin 8. Thereby the pressure plate is released from the shell 2 but accompanies the shell out from the barrel 2, but due to its much smaller weight the pressure plate falls down to the ground very soon after having left the barrel, while the shell, which has absorbed all pressure energy from the propellant charge and the pressure plate, is expelled out from the barrel.
The shell includes an effective portion 10, in which the effective charge (not shown) is located. Further, the shell includes a support portion 11, which constitutes the head portion of the shell, i.e. the portion which hits into the ground. The support portion 11 has a backing tube 12, around which the effective portion 10 with fins 13 is arranged. Thus, the effective portion 10 is applied on the backing tube 12 and is held by some kind of frictional force or equivalent. This implies, that when the pressure force of the propellant charge is released, this acts firstly on the pressure plate 3, and then the pressure action is transmitted directly onto the backing tube 12 through the stud 7, and due to frictional force between the backing tube 12 and the effective
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Bergin James S.
Carone Michael J.
Roheim System
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